1964 327 (Bored/Stroked to 383) Dyno Test
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- Опубликовано: 16 окт 2024
- 327 Chevy small block dyno test. (May 8th 2022 edited title to avoid confusion)
Bored and stroked to a 383 and built for my 64 Impala that is being restored. Matching casting numbers, original looks, high torque and good manners were important.
Using the dyno shop headers, it managed to get 420 torque and 378 horsepower using stock 327 block, heads, intake.
With the stock 2.5 inch cast iron exhaust manifolds and 2.5 inch head pipes, 424 torque and 362 horsepower. Very little loss was attributed to the low flow rate of the stock intake manifold.
With the stock 2.5 inch cast iron exhaust manifolds, 2.5 inch head pipes and a 2 inch reducer at the end (the stock exhaust necks down from 2.5 to 2 inches) 404 torque and 351 horsepower.
With the stock 2.5 inch cast iron exhaust manifolds, 2.5 inch head pipes and a 2 inch reducer at the end and the stock air cleaner/filter 410 torque and 362 horsepower.
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Cool!
I swear those small block 327 are mean ass motors!!
It's not a 327 it's a 383
They didn't come with 383?
1964 327 had a small journals and only afew at end of 327s run were large journals, would have to be later block than 1964, havent ever found a small journal 400 crack WTF
Since I wanted date correct parts, this is a '64 327 block with (originally) small main journals. I did run across a small journal 383 stroker crank from Speed o motive when I was considering this. I think they are out of business now. But the engine builder went the route of putting large journal caps on the small journal block and having it line bored to large journal size. This gave more choices for the crankshaft (I went with a forged crank).
Dang belt couldn't be any more loose!
Apparently, the belt does not need to turn the water pump all that much for a short run. And it keeps the parasitic loss of running the pump to a minimum, so slightly higher HP on the dyno run. I have seen other dynos that use electric water pumps for that reason.
Hey guys! Read the notes. It had to line bored to .200 over for the 383 crank to fit. Needed to be titled as such. Thought I would see another dump test on a THREE TWENTY SEVEN.
I can't believe the belt stayed on
Short stroke that had it kinda like a honey badger
It must be my computer, but I absolutely could not read 90% of the written text in this video. Disappointing, because I was really wanting to know these dyno numbers.
ROFL this is hilarious. these guys need to stick with building those cheeseburgers theyve been scarfing down and leave engine building to the experts. good job guys you can fuck up a small block chevy which is the most basic engine ever.
Beautiful engine !
Remembering the 327 when it campout the fall of '61. Great, great engine.
In what universe is a 383 considered 327 cubic inches?
its a 327 block.
@@ihatejustin500 so what does that matter, its still stroked to a 383, its no longer a 327
@@ihatejustin500 327 350 small block Chevy hes right it's no longer a 327 and it has to be 69 and up large journal too which means it's basically a 350 same crank and stroke to be a 327 all they did was decrease the bore before 69 they were a breed along with the 283 and 302 that were very high revving high horse power motors when set up right the small journal crank alowed them to spin easier and into the stratosphere provided the valve train could keep up but unfortunately they often see destructed for obvious reasons
@@glennmanchester1568 Sorry if i wasn't clear in what i was saying. i meant it seems that its a 327 block which he states he bored and stroked to a 383 displacement.
@@glennmanchester1568 283 with 3 7/8 inch bore all 3:27 or 4 inch bore sorry partner better do some studying
i would find a new dyno shop. that place sucks.
I've ran them in 250 lap endurance races. Very brutal races. And the last one was in a mudtruck with a rad packed full of mud, got stuck and got very hot.
I just bought a 83 Pontiac Grand Prix. I'm putting a TH350 behind a 327. I could put a 2 speed power glide behind it. But I might use it as a daily driver if my 91 rangers trans goes. So I'm just gonna go with the TH350. I'm new to mechanics so if anything was wrong with that paragraph. Please tell me so I can not do it again 😂
thanks for all the numbers, hope you have more dynos w/###. the first motor i bought as a kid was a 327 vette motor that i put in a sleeper truck, a early 60s chevy with a truck 4 speed. rat rodding in the early 70s
Thats a badass 327 dude.
Have tuned Chevy 327 before but nothing this good or powerful. Miss the old days when you could do your own work and repairs. Still have my RAC Maxi Tune Dwell meter but no manual and wish someone would post a video on how to hookup a good dwell meter or upload the original RAC Maxi Tune manual for the DIY mechanic who gets to work on these older engines.
Pound for pound the best engine ever built. 265-283-327-350 Chevy. Simply the best.
Chrysler/Dodge 340/360 are real good too.
debatable.
SBC 262 - 400...
I remember an Orange Engine south of Chapman on Tustin I think. About 1970. I'd ride along with my dad to get parts and stuff.
How much what's your phone number
I just found out that in 1968, chevy also made 4 bolt main block 327s in their trucks, limited numbers only. Many guys said they werent made, but a guy from the Flint Michigan plant answered and said there were small numbers of them. I always thought they were all 2 bolt.
I thought most corvette 327 motors from the mid 60's were 4 bolt mains? I had a small journal crank 327 that came factory in a 62 Pontiac...from the owners manual it was the same spec as the mid -power 62 vette ...300 hp, same carb, same temperature activated fan, 10 1/2 - 1 compression...but not a four bolt main motor.
I have an 365hp 327 lg journal, it was bought new in about 1977 as a short block from GM iirc $400
Back in '69 I built a 327 (actually 331, 030 over) for my 67 Corvette out of a 350 4 bolt block and a forged large journal 327 '68 truck crank. I wasn't after max power, but I thought a 67 should have a 327, not a 350. So the block would not pass scrutiny by an expert, but it's stronger and I built it to be turbo'd. Big valve angle plug factory heads, much relieving around the valves, flat top forged pistons netted 9.3:1 CR which for modest boost is OK. Now running w/o turbo and Qjet carb on iron manifold with iron exh manifolds and mild solid lifter cam because that car originally had a solid cam (435 HP) and I like the way they sound. It's a driver. Never had it on a dyno, but it runs great on any gas I put in it and is rock solid. I've gotten as high as 25 mpg on a trip, but high teens is more common. Open element air cleaner in warmer weather, large snorkel heated air cleaner housing in colder damp weather - absolutely transformed the car from balky cold blooded POS to a pleasant, smooth driver, quick to warm up and go in colder weather. Still driving it.
that would have just been a 4 bolt 350 block with a large journal 327 crank...
010 block… 2 or 4 bolt large journal 327..later used in 350’s
Nice engine. I had a few 327's. I've blown up all of them. I have 327 damage reports posted on my channel from the last 327 that blew up!
MudRFunR if your blowing up a 327 you not taking care of it
could you maybe...stop building 327s and blowing them up, since it seems you cant build anything worth a shit?
Been looking for a dyno comparison on stock exhaust manifolds vs headers. Thank you. I guess I will keep my rams horns (chevy) for that little improvement.
remember stock intake is holding things back too ....there is more torque available there
410 torque through stock exhaust and drawing through stock air cleaner is respectable
Better rpm by 2 k than any 350 4 mpg better than any 350. 22k pound truck / trailer 72 chevy 4x4 over 9% grade L 2 at 5800 rpm. 5 miles not a thot of a problem best sbc ever made old school best
The "ram horns" are considered just about equal to headers. They should have been on the '55 and '56 models too.
The "rams horns" came in different sizes. In 1962 I ordered an Impala with the 300hp 327. It had 2.5 inch outlets and the 250hp I believe had 2 inch outlets. I did a lot of drag racing in stock classes and switched to a set of Hedman headers and found no noticeable difference in performance. It did sound better though!
alway thought that would be a great combo , a 383 draft tube block looking stock. Great.
How did you get a large journal crank from a 400 sbc to fit the small journal 327 mains?
the $64000 question
@@michaelphelps5064 the same way an original 400 crank was
turned down to fit in a 350 block. they most likely bought
an Eagle or Scat crank that come with mains to fit 350's,
and turned that crank down to fit the smaller 327 journals.
or line-bored the mains to 350 size journals, which would
have been more expensive and time consuming.
Stock Heads? are you using the stock steel crank? These are pretty mean numbers for a 327 not bad at all.
Compression ratio 9.5, designed for what passes for Premium gas here in Cali. Pistons are Speed Pro. Roller tipped stamped steel rockers and retrofit hydraulic roller lifters. Cam is a mild one, 218 intake and 224 exhaust at .050 lift. Intake manifold is stock casting # 3844459.
did you notch the pan rails and lower cylinder bores
for rod bolt clearance ?
So if you went with an original 327 block just to go to 383 cubes why didnt you do that with the 350 that was already in there?
D.Szymanski 327 and 350s have the same bore size and a lot of cars back in the 327s day never got a 350 cause it didnt exist
wanted the stock appearance of the old school engine. Sleeper 327/383. .
agreed...ruined that 327, and im a mopar guy....
I have a 327 I'm about to build out of my 67 Camaro. I went with the rams horn exhaust on my 57 Bel Air because of clearance problems. It's great to see they make only a minor difference until 5200. For daily drivers, that's just fine. Easier to get to plugs, starter, no starter heat soak, cooler engine bay when ceramic coated.
I find it funny how some people think a 1964 327 can't make that much HP. Face it people Old school HP before the smog regulations made a lot of power.
A 327 that's been bored and stroked to 383 is no longer a 327.
Tim: Agreed, But its still a SBC
And so is a 434 your point is ?
If guy wants to re work a 327 and stuff it full of stroker parts then let him end of the day his mill his vision either way a small block will spank a Ford or Mopar of equal cubic inch any day.... Or at least they do when I build them.
TPV Productions that's a lot more Hp and more torque than a 390 ford or a 383 mopar
5252 number is good over 1 hp / cube pump gas ?
I wanted perfectly stock appearance. A 350 block has several differences that can be noticed easily, like the stamp pad and crank case ventilation.
Hydraulic roller lifters and a mild custom cam. Duration at 050 280 intake, 224 exhaust. Valve lift .502-.508, lobe center 112
Proof that headers are pretty much a waste of time and money for a daily driver, 3000 to 5000 rpm the power gain was negligible. On some engines the stock exhaust manifolds are equal to headers, big block mopars, again for the daily drivers, in the idle to 5,000 rpm range.
wat cam bearings n piston rings ya recommend for my 67 327 doin a budget build
The back fire was cool. I love the look of the stock air cleaner assembly and exhaust manifolds.
It's a small journal ,No company makes a small jor 3.75 stroke for a small jor block, the most you can get is about 340 cu in and I wouldn't trust it.., a 327 .030 to .060 over build right, can make over 390 ft lbs and about 480 hp, but not with those heads, we raced them for years, someone is full of crap, also you got your CF knob maxed out..... quit being shady... best low budget build for the 327, h and m 292 .550 108, cam. 492 ported 2.02, 1.60, heads ti valves add stud girdles for high rpm, a good set or rollers run 12.5 to 1 pistons narrow ring, on 106 fuel, and the biggest ported dual plane you can find we used a eldebrock c3bx Holley 830 dp... small jor, stk steel shaft, good carillo rods dry sump it.. and you need 1 5/8 long tubes.. a nice set of stiff valve springs, sling to 8500rpm it will move... build it less than 4k minus the dry sump... add a set of 221cc brodix heads and a tall vic jr you can bump it up another 100hp, quit being foolish.
the 327 was crying out for what it got a bigger bore and much longer stroke they should have all been 383's since 1962 when they went from 283's to 327's sbc greatest engine ever!
It's no longer a 327 is it and is it the small journal 327 or large which is a 350 crank apparently it has to be to get tje 400 crank so the 327 is no longer a 327 at all it's a 30 over 350 now 355 with a totally different externally balanced crank from a 400 which lengthened the stroke considerably now how is cu inches determined ?? Bore and stroke ?? It started life as a 327 block ok well it's 69 and up which was a 350 block underbored to be a 327 the stroke and crank are exactly tje same as a 350 the 69 and up 327 motors. Are not anything special whatsoever and actually are not much more than a stock. 305 plus 22 cu inches no power or torque to speak of small jug motors
@@glennmanchester1568 got it backwards Glenn..bore is the same on a 350 or a 327 at 4 inches .The stroke was different,3.25 for a 327 and 3.48 for a 350.
@@glennmanchester1568 what is "underbored"? 327 and 350
share the same 4 inch bore. 327's use a 3.25 stroke,
350's use a 3.48 stroke. 305's are completely useless.
A 305 is an underbored 350 that's the reason they are junk the bore is so small the valves and combustion chamber are shrouded they weren't designed to be upgraded they were the general motors corporate work horse good torque numbers but low hp ratings low compression. Engines and so it goes you wanna spend the money build a motor make it a 350 cause the 305 is not your best choice 327 you mentioned had a much bigger piston. But a shorter stroke so it goes again big jug short stroke motors spin Into the stratosphere but will make big power up there so they shrouded the valves made it so the heads can only flow like shit A small combustion chamber and a dished piston and the 305 can only be bored to about 40 over unless you stroke it that's it no more than 312
dodge had a 383 in 59 :)
Hmm. Loose distributor walking away. Still happy to see and hear a hot street SBC any day.
I was responding to Jeff Carr's comments. Looked over your post and still found no mention of this being a 383. Makes all the difference.
what did it like for ignition timing???
4 bangers today produce that much torque. .unbelievable
Yes, it is very unbelievable that production 4 cylinder cars have over 400 ft lbs of torque. The 2017 Toyota Camry 2.5 liter 4 cylinder produces 170 ft lbs. according to Toyota's website. Now I suppose you could hot rod a 4 cylinder with nitrous and turbos to get numbers like that, but I doubt such engines last very long. And yes, engine technology has improved a lot since this engine was made. Both in power and durability and efficiency.
I'm not a Chevy fan, but the 327 always had a sweet spot in my heart for some reason. It seemed to hit way over it's size. As to 4 banger torque, Levi is wrong... the Ford Focus RS has a 2.3-liter turbocharged 4-cylinder engine; 350 hp, 350 lb-ft. Took a lot of work to get it there. I respect both.
levi 287 do your homework
Yep, you dont see any V8 chevys having to bolt on turbos to double their hp though. And chevy ports are prehistoric compared to the advancements made in port flow in the last 30 years. Racing open wheel you have to retire your heads every year for a better ported pair or you dont win races.
Well he should put one of yur ricers in then!
any advice on what brand cam bearings n main bearings ?
That's the worst dyno session I've ever seen.
wat brand pistong rings yall used?
My 327 with the corvette ram horns and solid lifter cam made 500hp so I know it is possible, camel hump heads ,and a carb that was sent out to be built just for th he cam and intake head set up
uh-huh....i bet it popped wheelies on the street too.
@@frigglebiscuit7484 I wish,but it would burn the tires in to 3rd, it truly is how you build them,building a 377 right now, hoping 600hp.
you would not want to do that the small journal is awsome rev monster i had one in a 71 nova built it was bad ass
wish i could do this shit to mine
It was fun getting some nice torque out of a "327" On the downside, only 9 mpg!
Wow that's was great. I would love a reply on cam specs as well as cylinder heads and pistons. Also, what carb? Once again great.
Looks like prolly about a 204/214 truck performance cam, flat top pistons, 461X heads, and 750 CFM carb...
to be fair, it did say 327 rather than a 383 stroker.....
It's a sweet vintage looking engine but a stroker 383 is not a 327. You didn't dyno test a 327. You dyno tested a 383 dressed to look like a 327. The dyno results would be impressive if the engine was a 327 but they're pretty "ho-hum" for a 383. It's cool you used the original block and heads and the performance will surprise unsuspecting challengers but your caption should have been honest and said, "383 Dyno Test". You can dress any small block to look like any size engine you want. Heck, I've dressed a 454 with 396 decals before. No big deal, but I'd never say I'm dyno testing a 396 , 427 or 454 when I'm actually dyno testing a 496 .
wat cam and rocker n carb u used
Is this the 30-30 solid lifter cam?
@dcairns61 That changes the whole picture! I stand corrected.
Engine sounded really good I might add.
Sounds pretty good.I bet your impala has plenty of pep! Them 327`s are revmasters for sure.Loved mine.
Big jug and long stroke makes power thats dah how it works in the naturally aspirated world lol nowadays tho nothing is naturally aspirated anymore and power numbers are way different
How u like the stuff for sends because of me lol
Dino screwed up these guys don't seem to have much upstairs
@jridge56
It helps that it has been bored and stroked and displaces 383 cubic inches ;) Lots of 383's with aftermarket stuff do much better than that, but this was constrained by using the stock block, heads, intake and exhaust.
explaine how you put a 400 large jurnal crank in a small jurnal engine
@@butchking154 You turn the mains down to fit the small journal block. Pontiac guys have been stuffing 455 big main cranks in 400 small main blocks for years. Not a real technical problem for a competent machine shop.
That's very cool. Can you tell me what you've done to the engine? What pistons, cam,intake manifold are you running? What CR does it have?
how much did that cost?
Yeah that's dumb bullshit. Oh check out my "327" The power numbers are weak as fuck for a 383. You could make that with the dam 327.
SWEET
I've run many of them with good numbers and dependability over 7000 rpm. Maybe question your build man?
understood.
Did you miss that this 327 is bored and stroked to 383? It is doing good considering it is stuck with the stock intake manifold and heads, which was my choice to keep perfectly stock external appearance.
@beeterolds he is trying to keep the car original the 64 came with a 327
That belt can't be spinning the water pump right, it looked like it about jumped off one time ...lol
The dyno operator said it was 'good enough'. Perhaps it is a bit of a cheat. Keeping it loose lets it slip at higher RPMs so it has less drag on the motor, giving better power numbers.
I didn't know you could stroke a small journal 327 to a 383. I've got a 327 in my garage.
Daxton Brown not all 327 are small journal i believe 68 was the year went to 2.45 on mains
Small journal blocks can be line bored to be large journal and use a regular stroker crank (which is what I did). Also, there were a few companies out there selling stroker cranks for small journal blocks.
All 1964 Blocks were small Journal.. He must of cut the mains down and run 2.00" rods with a seriously mocked out block.
The "SBC" THE most "VERSATILE" engine ever made/produced, Hands down........
Or maybe the Buick/Olds/Rover 215" / 3.5 L all aluminum V8... first seen in 1951... mass produced turbocharged in 1960 - 63 for Olds JetFire... in production until 2000... still available on the aftermarket... also converted to overhead cam from F1 racing use... later enlarged to 318" / 5.2 L... favorite swapping engine in Europe... only 320 lbs...
All i'm saying, Is the 1st gen SBC is the most versatile engine made, you can get parts ANYWHERE for them they are versatile in design and they are easy to work on/rebuild. Where most other engines would cost much more to rebuild, The 1st gen SBC is cheaper......HANDS DOWN. T.W.I.M.
Zenme Yangzi maybe for a numbers matching my 65 vette 327 rated at 360 hp probably a lot of other reasons to waste money on 327
allen blackman And price per price will ALWAYS make more power tham a similar CI engine.
@@allenblackman1459 versatile does not mean "can find parts anywhere".
Hey there funny guy.. The only people who could ever or would ever be able to tell the difference between them are going to be the very same people who can easily tell IT'S NOT A 327 so you reasoning is kaput . please tell Me you didn't already know that and I'm just not overly excited about restoring a 4 dr anything
shit like this is as bad as weird crap mopar restorers do. trust me, im a mopar fan, id know.
to all the description says nothing about boring and stroking
Since several people seem to be confused, I added the info about it being bored and stroked to 383 in the description.
How is the stroking on the small journal crank?
Large journal caps were installed, then line bored to large journal size. This allowed the use of an off the shelf forged 383 stroker crank.
what is the purpose of a dyno test?
option man to accurately determine the horsepower and torque output of an engine
Adam Hamshou thanks for the explanation. I appreciate it
To test what timing/jetting makes the most power, this also makes the engine last longer.
@@donrutter6765 Running an engine on a dyno does not increase engine life, running it properly tuned does.
U know the more I think and hear and see I just wanna grow to levels and sort all performances down and separate all the breeds because sometimes the ones that are to real say the way the sound not really the way they build there horsepower but yes they way they build the rpms are separate and what has to be done is how to chase all the rules like I explained the other day as I watch study and feel and learn what's really going on is to take the ones that need to be created in certain stuff even if they got more horsepower at the end and as I chase down all breeds and create all the skellitol that vise verses the way it barrels and builds tacktics around the breeds that have to vise versa the more deffense engines just like I explained and what it I have to do is keep createing all the evil offense and the good offense that revolves around the deffense that builds a cycle around deffense and revolves around deffense that builds skellitol visions and feelings to feel and to chase down them to allways keep building mask that create charts and residences with creates ways of how to organize the blocks all parts and e with bit of tacktics that's side lined around everything even all the programs and even what's real deffense that's why jcds is so real now...because it's completely against the grain so that's what it's about us to allways build skellitol Visio s thoughts and feelings to study and to find and control offense and deffense I'm in another time zone and in another era level of levels and I'm way down deep somewheres that's why I can feel and know and control what's inside of my mind to think because I'm left behind so everything made me far away from everything I had to be in bumb fucked Egypt to let the world and the pack go by with whatever they felt like they had to do say or threaten to do what ever it is all the bull shit is the reason why I'm hear and why I know what I know and why I can feel what I can feel and know to know with my own wisdom and knowledge in in a impire that I built and it's jacks world I got a big some and the most satanic visions around where I'm at if it's not hear then I build it some where else...just like back 2 the future...i do t know but how to restart and to drop back and down eatch and everyday like I feel like I don't know what I can remember that's what offense is a bunch of notches that get piled up of negative subtraction bars and deffense steady continues yo build plus signs on top of the subtraction bars that's why I can create all the cemetery and the mask that I think of cause it's so much that creates the meckignizums and all the low mid and hug and skellitol stinceks and ruff drafts and offense that builds all the realiest thinking and feelings to always use as a brain storm and a meckignizum now to build shops with study's and knowledge and wisdom into the shops and drag stuff from them......thers gonna be so much that builds the foundation and estabels the creation and organizes the lab the labetory and the foundation. That's gonna build it to create all the mask the main stuff that creates it all and then how you keep draggin more mask to stuff....and build visions with it all and obtain it all...u know it will always be how to create dyno charts and ways of thinkin of how to keep thinkin of creating offense of knowledge and the skellitol.of how to revolve the feelings to create watch think is going on and is really gonna brake down when u hear deffense run and when u watch deffense run and how to think for another performance that's against deffense because ubhave to build mask that's what its all about......uum yeah u gotta think of offense that's never been thought of as u feel it eternal and are thinking of wisdom that goes on through the block eternal and through out all the debideing lines areas sections and departments all items accessories and parts....witch what I do I'm like hallow man the terminator and I'm drop dead fred I mutilate all the parts down build a pile of substances and it's liquids then think for the parts as they was with every bit of deffense about them and how to then re form.them.and reshape and re structure them and reform.them with offense and even the deffense of technical and tecknicalty and forms and build mask for it all again watch and evetytime....
That's all one sentence? I couldn't read the whole thing. Didn't know where to pause.
Just tried to read all of it. What the hell are you smoking?
jesus christ, did you just type the entire bee movie script?
A sleeper!
Sweet music!
I have a 64 / 327 camel heads made 402 hp at 7000 rpm .It's for sale
Ron, do you have a dyno printout to show that ?
@@normhodgkinson6965 the engine was built by Fairman racing in Houston Tx and was dyno proven .They have built 3 motors for me all of them was great reliability and performance.
@@ronhue3522 , i don't doubt they built good motors for you. its just that i have been
building, racing, and having my engines run on dynos, for over 35 years, and
i have never seen a dyno operator run a motor much past 5600 or 5800 rpm's
where the peak HP and torque begin to fall off. i've built a couple 327's
years ago similar to yours, and it made 422 HP at 5740 rpm's. what type of
cam did you have, roller ? hydraulic ? lift ? duration ? just curious.
get that restrictive air cleaner horn off there and let it breath
TheNorthsquad all dyno tests use that..
This is a joke
I remember all the hype over the 350 when it came out in 68-9. It was in response to the EPA regulations of the day. Their were several side by side comparisons in Hot Rod, Car Craft and Hot Redding magazine during the time when the 350 first hit the streets, and most of them showed that the 327 had more potential than the 350. Builds with the same cam, compression, rods, and manifolds repeatedly showed that the 327 was a more efficient engine, due to its bore to stroke and Rod length to stroke ratios! Why anyone would want a 350 is beyond me if they can find a 327 instead. The same with the 427 over the 454. The Rod length to stroke ratio of the 454 is downright crazy. Try to find a 454 crank, cast or forged, in the 70's and 80's and you'll pay and arm and a leg for the core charge on the 454. With a rod ratio near 1.5-1 it's easy to see why so many 454 cranks broke. The same with the aftermarket 383 and 400SB Chevies. Lost of them in every shops just iron pile, and not too many for sale. No we have an abundance of quality forging sand billet crankshafts and rods available, so it's easy to ignore bad rod ratios. It still takes its toll on the major thrust side of the block though, making bores egg shaped after a few years of wear. I'm glad these guys are building this 327!
For a street motor low end torque is what most people will care about. In both of your example the 350 and 454 torque comes on earlier. Both of them can rev pretty high as they have reasonable strokes. You make it sound like they are under square motor, they are still over square. If you compare the L76 327 with the LT1 350, nearly identical aside from the stroke, the LT1 made more torque and HP. Same is true of the L72 427 and LS6 454 which are the same aside from the stroke. Generally speaking these motor motor are still very close in performance when spec'd the same. I also in terms of reliability the 327 lags behind the 350 although mainly because of the small journal size. I think you would be hard pressed to make the case with the big blocks as well.
As for reliability the extreme stroker motors seem to hold up pretty well, I know it surprised me. Sure they cant's reach very high revs but they have a massive displacement advantage to make up for it. I you can build a 327 or 427 to handle 7500rpm or you can stroke SBC to 420 or BBC 572 that only revs to 5500 but makes a metric shit ton more power.
Also this is a 327 block bored and stroked to a 383.
GlassTopRX7 the small journal on the 327 does NOT make it less reliable, i have one and i have large journal 350 engines too.. if anything it is an advantage.. smaller journal takes less force to turn and wears less, it is true that the longer stroke in the 350 is better for emissions.. that being said a stock 327 is MUCH faster than a stock or even mild 350, however if you go all out and build a drag motor 327 and 350 from the ground up with the biggest camshafts and biggest upgrades that can be done to both.. yeah the 350 will be faster as it has more overall displacement and yes they have more torque but the 327 turns an unreal amount of rpms with that short stroke and they are really close in power and i'd even say the 327 is faster on the street when closer to stock form. the longer stroke engines have more torque on the bottom but the 327 has a power ban on the top that is hard to beat from 50-100 mph like on a short track for example.. but for overall top speed over 100 mph.. the bigger displacement the better, thats the same reason why Hemi's won so many superspeedway races in Nascar and the same reason they ran small block chevy's on short tracks back in the day.
The smaller journals wear faster and are weaker. In addition to that in high hp builds the are more prone to spinning bearings. If what you are suggested was the case the 302 would have retained the small journals, the change was made as result of high bottom end failure rate in competition.
The revs don't matter with stock heads, all them made peak HP at or under 6500.
GlassTopRX7 no the reason they went to large journal 327's was because the 350's are large journals and came out in '67 and they wanted to have the same block casting for both the 327 and 350, its not because they had trouble or anything like that both large journal and small journal's are fine.. its just ideally the 327 was originally designed to be small journal, that being said large journal is ok too, there were no problems with either one. I have built small journal 2 bolt main 327's with roller cams and stock rods and NEVER had any issues. this is a moot point and minor differences were talking here but when I said large journals wear faster I was referring to 350's with the bigger cranks vs small journal 327's..
GlassTopRX7 small journal, slows bearing speed= less friction, higher rpms.. read grumpy jenkins book.
such a low lift cam and those low flow iron heads no way it made those numbers
The HP of a fuel injected 375 HP 327" but with the torque of it's 383"s...
im surprised how much power it made with those crappy ram's horns manifolds . that thing will be a torque monster with those small parts on such a big engine . 383 wins
at least a 283 made one hp pr cubic inch. this engine needs help, afr heads rpm air gap intake long tube headers. great tq numbers for your "327" sleeper , will pull that old car nicely.
C'mon. 430 torque @ 3100 RPM? No way. Not possible. Even the new truck LS 5.3 is 100 lb-ft less than that. Sorry, better check the dyno calibration as it is very optimistic.
jridge56 how is it not possible? you do understand tthe ls has a high rpm ranger tendency while a sbc has a different firing order and etc
this is a 383 cu in dude. also, i wouldnt be suprised if a stock stroke 327 did make more tq than a 5.3 if both were built the same. the ls engines have weird ass tiny bore/long strokes, and it just doesnt have the swept volume that big bores do.
Lol
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..lol
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