Sick build, I’ve never messed with anything above 15:1 but you sure made it work really well, that power curve is steady and it sounds like that thing can pull at any rpm. If you keep up the good work It’ll be over 800 in no time
Sitting on 2 new blocks. one LS3 and straight line bored and sleeved late gen LT. Looking at all the guys like yourself. Looking to build a hi RPM to replace turbo 6.0 to go into a 2700 lb FD RX7. Cant wait for your solid lifter also. Thank you for the content.
Man that’s some great numbers for that head combination working on a very similar project with 14:1 compression wasn’t sure how much timing I could get away with I don’t have access to a dyno so just be going off what the plugs look like thanks for the help
You could spin that thing to 8000 and pickup a few more hp. It looks like it didn’t wake up till 6000rpms, I’d love to see this setup with solid roller and more rpms. Awesome build
@@dustinlee5566 love it!! That’s absolutely amazing. I’d love to build something like this.. but I’m poor! maybe one day lol… be a nice swap for my regular cab short bed 4x4 Silverado
Sweet build man and btw, there’s nothing wrong with lost of compression IF you know what your doing and it’s obvious your not just guessing… Good luck!
Unfortunately I didn’t have enough time that day at the dyno or we would have ran it higher at least 8000 rpm. I like to start the pull close to where the converter stall speed is, most drag race cars the torque converters are pretty high stall. I’m going to do a video here soon on how and why we run the engines this way.
Dustin, do you ever do any all-motor builds like this with more common blocks? Something along the lines of a factory LS3 block and crank (or 6L)? I'd love to see what you could do with something like that, whether it be with factory heads or not. Gwatney Performance has made 855 with a factory parts bottom end, with a lot of piston flycutting I gather, so anything in along those lines that is setup to rev hard and make big top end power would be cool to see.
@@dustinlee5566 That would be great! The all-motor stuff makes for some really great content, since there are so many cool details to it. And I think I got the HP number wrong for that Gwatney stock bottom end LS3 build. I think it was around 829 or something...
Epic build bro, very impressive, and well thought out, I’m not sure what those heads flow, but I know the liberty heads have a lot of potential when ported right, and it looks like you have plenty of room to take more off the deck of the heads, why didn’t you do that, so you could go with a smaller dome? You may crack 870-900 on the next build doing that with a solid roller, nothing wrong with a 800 hp hydraulic setup though!
Thank you, I had more room to surface the heads but, here lies the problem as you mill the heads especially after .040” the airflow at higher lifts starts to diminished rather quickly, that’s why I had reshaped the chambers. Yes a smaller chamber with a smaller dome will make more power if you don’t loose airflow, which the LS heads do have a problem with them and all the ones I’ve tested on the flow bench seem to all show the same problem that they’re very very combustion chamber sensitive.
@@dustinlee5566 Eric weingartner has a video on the Chinese liberty heads, if you haven’t seen it, you will probably be interested for the money/potential they have
Please don't forget poor side of your RUclips viewers.) Some gen3 4.8/5.3 for pure drag application would be hot! LS3 impressive nevertheless. Dream engine.
I love the big piston but the cylinder wall is so thin. Can it handle 800 hp without getting a crack in it. Only time and test will tell if it is reliable.
Honestly we ran out of time, the pull before with that carb it was peaking around 7200, I cooled the engine down to see if it liked that and it did, had I had another hour on the dyno I would have ran it to 8000 just to see how the power curve looked.
That makes sense if your just using the dyno to see the peak horsepower. I would want to see what it is doing above peak because it's faster to shift above peak and will see that on the track. Easier to fix a valve float or oil pressure issue before the engine goes in the car
I agree, though I’ve ran this particular Valvetrain combo 8500 in my own personal dragster, so I know it’s very reliable. We did have too much vacuum earlier in the day and we made some changes with the oil pump and pulled some vacuum out of it. I had nearly 20” on a few of the earlier pulls and felt that was too much for non coated wrist pins and the internal oil pump doesn’t like that either.
.050”:249.0 with a holley hi ram and a Holley 105mm throttle body so what do you think? Hope makes more then 700hp never have check the m311 frankienstein heads hope they do Hp
@dustinlee5566 this isnt the best place to ask but what are your opinions on lobe separation, ICL and dry flow direct injection engines? GM LT engines I'm speaking about specifically.
@@dustinlee5566 I would rather have 450 to the wheels and be able to use 89 octane kind of like my heads and cam coyote.. but that motor looks pretty wicked though I would like it at 11.5 compression so I could use pump gas.. I want to see that thing run
I haven’t yet, but I’m working on a build for myself, high compression, solid roller LS3 combo and when I dyno it I have some things I’d like to try with it. Should be a 920-950hp piece.
@@dustinlee5566 I have a 427 dart block with mast ls7 heads and am looking at super vic and cid. Was curious if height differences was worth the trouble of cutting hood on a ram air Trans am
In my opinion if you’re think you might be in the 900hp range I think the CID will be the better choice. Around 800hp the Super Victor has worked well for me with the LS7 head.
It would be a good test to try E85. I think though in my opinion that you might have pull some timing out to help with detonation issues. But would be a try.
Well to be perfectly honest, the stock GM rockers are one of the keys to getting the LS to run 8000 plus RPM with a hydraulic roller camshaft. They have the lowest inertia weight of any rocker arm. Big key in the Valvetrain.
@@dustinlee5566 ..........yes, 791 HP.....but close enough to 800. All else being left the same, how much HP (just by rule of thumb) would it lose making it 12.5:1 so you could run it full time on E85....?
@@dustinlee5566 ……..do you think going solid roller would bring it back to 800 hp? I’m about to install a T6 turbo on my fully forged iron LS (LQ9) and it should make 1300 RWHP. Roll racing is what we do around S. Florida. But I’ve been wanting a big power N/A engine again. There’s nothing like raw N/A power. Having a 725 RWHP N/A engine with a 250 progressive shot would make a nice roll racer too.
On this particular combo I would expect 80hp more with a solid roller. I’ll be dynoing my 419” LS3 here soon, it’s a solid roller combo. I’ll be sure to go over it in detail.
Very nice build. I like how you went straight to 16:1 because you had a specific purpose for it. Excellent numbers.
Thank you.
Sick build, I’ve never messed with anything above 15:1 but you sure made it work really well, that power curve is steady and it sounds like that thing can pull at any rpm. If you keep up the good work It’ll be over 800 in no time
Thank you.
Sitting on 2 new blocks. one LS3 and straight line bored and sleeved late gen LT. Looking at all the guys like yourself. Looking to build a hi RPM to replace turbo 6.0 to go into a 2700 lb FD RX7.
Cant wait for your solid lifter also. Thank you for the content.
Cool deal, I’ll hopefully have that build starting here in a couple weeks.
Man that’s some great numbers for that head combination working on a very similar project with 14:1 compression wasn’t sure how much timing I could get away with I don’t have access to a dyno so just be going off what the plugs look like thanks for the help
Not a problem, I’ll have more videos on dyno tuning here soon. Thank you for the compliment as well.
Killer build have you ever bored out a gm aluminum 5.3 block to 3.900 or larger?
Thank you, I haven’t tried boring the aluminum 5.3 out, but I’ve done an iron 5.3 block before
Nice build, thanks for sharing.
Good luck on the dyno.
I think you may make more HP.
Take care, Ed.
Thank you.
You could spin that thing to 8000 and pickup a few more hp. It looks like it didn’t wake up till 6000rpms, I’d love to see this setup with solid roller and more rpms. Awesome build
I’ve got one I’m doing right now with a solid roller, I’ll post up a few part build of it and definitely rev it way up.
@@dustinlee5566 love it!! That’s absolutely amazing. I’d love to build something like this.. but I’m poor! maybe one day lol… be a nice swap for my regular cab short bed 4x4 Silverado
Sounds Great Dustin!!!! 791!!!!
Thank you.
Gunna hurt some big block feelings for sure haha!
Haha that’s the plan.
I doubt it 🤣
Bbc, ls, sbc, as long as you put a turbo and efi its good. You na guys are nuts lol
Sweet build man and btw, there’s nothing wrong with lost of compression IF you know what your doing and it’s obvious your not just guessing… Good luck!
Thank you.
Far beyond impressive
Thank you.
Thats a nice build
Thank you.
Love it- but Starts the pass at 6100??? This is not a 9,000 rpm motor..
Love the compression..... Much better rings package go for it bud-!!
Unfortunately I didn’t have enough time that day at the dyno or we would have ran it higher at least 8000 rpm. I like to start the pull close to where the converter stall speed is, most drag race cars the torque converters are pretty high stall. I’m going to do a video here soon on how and why we run the engines this way.
Dustin, do you ever do any all-motor builds like this with more common blocks? Something along the lines of a factory LS3 block and crank (or 6L)? I'd love to see what you could do with something like that, whether it be with factory heads or not. Gwatney Performance has made 855 with a factory parts bottom end, with a lot of piston flycutting I gather, so anything in along those lines that is setup to rev hard and make big top end power would be cool to see.
There’s a possibility that I might do something down the road
@@dustinlee5566 That would be great! The all-motor stuff makes for some really great content, since there are so many cool details to it. And I think I got the HP number wrong for that Gwatney stock bottom end LS3 build. I think it was around 829 or something...
Glad you’re liking the content I appreciate that!
No worries hopefully here soon I’ll have project 7 seconds on it’s way together
@@dustinlee5566 Exciting!
What size is the cam in this beast?
Cam is 260/272 @ .050” .630”/.620”
@@dustinlee5566 I can't remember for sure, but it seems like you said you had Cam Motion do a cam in another engine for you. Did they do this one?
Yes this is a Cam Motion Camshaft.
@@dustinlee5566 Thank you!
Awesome video!
7,500 rpm on single valve spring, How is that possible 🙆 ???
Lightweight valves and using the latest in lobe design from Cam Motion. Will go to 8000 no problem
High compression has to do more with timing than anything else would be like a turbo car you got to have the timing sweet spot 😉
Epic build bro, very impressive, and well thought out, I’m not sure what those heads flow, but I know the liberty heads have a lot of potential when ported right, and it looks like you have plenty of room to take more off the deck of the heads, why didn’t you do that, so you could go with a smaller dome? You may crack 870-900 on the next build doing that with a solid roller, nothing wrong with a 800 hp hydraulic setup though!
Thank you, I had more room to surface the heads but, here lies the problem as you mill the heads especially after .040” the airflow at higher lifts starts to diminished rather quickly, that’s why I had reshaped the chambers. Yes a smaller chamber with a smaller dome will make more power if you don’t loose airflow, which the LS heads do have a problem with them and all the ones I’ve tested on the flow bench seem to all show the same problem that they’re very very combustion chamber sensitive.
@@dustinlee5566 that’s good info, do those heads have stock valve spacing? I wish I had a good flow bench to play with, I built a homemade one 😂
Yes those are just stock LS3’s factory valve spacing.
@@dustinlee5566 Eric weingartner has a video on the Chinese liberty heads, if you haven’t seen it, you will probably be interested for the money/potential they have
I’ll definitely check it out. Thanks.
Please don't forget poor side of your RUclips viewers.) Some gen3 4.8/5.3 for pure drag application would be hot! LS3 impressive nevertheless. Dream engine.
I’ve got a cool build coming up with a 5.3 combo
All those motors can make some dam good projects any ls v8 will do the job if u build it 4sho
I love the big piston but the cylinder wall is so thin. Can it handle 800 hp without getting a crack in it. Only time and test will tell if it is reliable.
Should be just fine at 4.125” bore diameter, block is solid between the cylinders
Compression works....even with boost.
It sure does, how all the COPO Supercharger engines are.
Sounds great
Thank you.
Very nice what kind of timing would you run in a build like this and are they ls7 heads
So I used the factory GM CNC LS3 heads. With some chamber modifications. As far as timing I made best power at 31°
Nice engine but why did you stop the pull at 7400? It was still climbing and it seems like you built it to rev.
Yeah going to 8000 would not be abusive.
Honestly we ran out of time, the pull before with that carb it was peaking around 7200, I cooled the engine down to see if it liked that and it did, had I had another hour on the dyno I would have ran it to 8000 just to see how the power curve looked.
That makes sense if your just using the dyno to see the peak horsepower. I would want to see what it is doing above peak because it's faster to shift above peak and will see that on the track. Easier to fix a valve float or oil pressure issue before the engine goes in the car
I agree, though I’ve ran this particular Valvetrain combo 8500 in my own personal dragster, so I know it’s very reliable. We did have too much vacuum earlier in the day and we made some changes with the oil pump and pulled some vacuum out of it. I had nearly 20” on a few of the earlier pulls and felt that was too much for non coated wrist pins and the internal oil pump doesn’t like that either.
@@dustinlee5566 wow... awesome for a hydro roller to carry out that far.
Hairy build!
Thank you.
Dustin i just made a 427 lsx with m311 frankienstein heads 11:55 compresion do you think would make 700hp?
How much camshaft did you put in it? If you’re in the high 240° range on duration on the intake you should be over 700hp.
.050”:249.0 with a holley hi ram and a Holley 105mm throttle body so what do you think? Hope makes more then 700hp never have check the m311 frankienstein heads hope they do Hp
very nice.
Thank you.
What camshaft dou you have?
1.62 ft. Lbs/cu.in. nice! In your opinion with a bigger solid roller high high could it go hp wise?
With a solid roller I would expect about a 80hp gain. I ran out of time on the dyno but this combo will run 8000 plus with hydraulic roller.
@@dustinlee5566 that is amazing
@dustinlee5566 this isnt the best place to ask but what are your opinions on lobe separation, ICL and dry flow direct injection engines? GM LT engines I'm speaking about specifically.
@@joeinmi8671 💩
@@dustinlee5566 That's amazing...
Can I run that on 87 octane
Unfortunately with a 16.5:1 compression ratio it requires race gas only.
@@dustinlee5566 I would rather have 450 to the wheels and be able to use 89 octane kind of like my heads and cam coyote.. but that motor looks pretty wicked though I would like it at 11.5 compression so I could use pump gas.. I want to see that thing run
Here soon we should have some videos up of it running at the track.
How big is your ring gap? Sick build btw
.019” on the top ring.
.021” on the second ring.
@@dustinlee5566 nicely done
Thank you.
What did you use for fuel management
I ran a 1050 Holley Dominator carb.
looks like Cathedral port LS-2 head
It had LS3 heads from GM
Is that a super vic intake?
Yes that’s an Edelbrock Super Victor Intake.
@@dustinlee5566 have you tested them against a Cid?
I haven’t yet, but I’m working on a build for myself, high compression, solid roller LS3 combo and when I dyno it I have some things I’d like to try with it. Should be a 920-950hp piece.
@@dustinlee5566 I have a 427 dart block with mast ls7 heads and am looking at super vic and cid. Was curious if height differences was worth the trouble of cutting hood on a ram air Trans am
In my opinion if you’re think you might be in the 900hp range I think the CID will be the better choice. Around 800hp the Super Victor has worked well for me with the LS7 head.
I want an lsr 😅
They’re a nice block, just pricey.
Let’s see what it will do with Methanol
Would definitely pickup torque in the lower rpm ranges based on some my previous testing. The Q16 makes very similar horsepower to Alcohol.
Can he slide by on e85?
@@dennisrobinson8008 Maybe E 85 but E 98 no problem
It would be a good test to try E85. I think though in my opinion that you might have pull some timing out to help with detonation issues. But would be a try.
@@dustinlee5566. You ever try the e85?
no roller rockers = your cheap !
Well to be perfectly honest, the stock GM rockers are one of the keys to getting the LS to run 8000 plus RPM with a hydraulic roller camshaft. They have the lowest inertia weight of any rocker arm. Big key in the Valvetrain.
Dude stop saying ummm so much
Only went 791. Junk.
Did you watch the whole video?
@@dustinlee5566 ..........yes, 791 HP.....but close enough to 800. All else being left the same, how much HP (just by rule of thumb) would it lose making it 12.5:1 so you could run it full time on E85....?
I think at 12.5:1 with E85 you would be in the 720-740hp range.
@@dustinlee5566 ……..do you think going solid roller would bring it back to 800 hp? I’m about to install a T6 turbo on my fully forged iron LS (LQ9) and it should make 1300 RWHP. Roll racing is what we do around S. Florida. But I’ve been wanting a big power N/A engine again. There’s nothing like raw N/A power. Having a 725 RWHP N/A engine with a 250 progressive shot would make a nice roll racer too.
On this particular combo I would expect 80hp more with a solid roller.
I’ll be dynoing my 419” LS3 here soon, it’s a solid roller combo. I’ll be sure to go over it in detail.
Bro say ummm one more time
Ummm thanks lol I’ll work on it. I’m an engine guy... Not person a that is use to doing videos..
@@dustinlee5566 ummm... ok =D
Ummm