I love how these always start out with "a fresh 306 crate motor from blueprint engines"....yeah, like the majority of us have the budget to just order up a fresh 306 crate. How about a real world test on a stock 302 the average guy would be working on?
You would get about the same 10 percent increase on your stock 302 that you saw in the video on the crate engine. If you had a stock 302 with 220HP it would roughly gain about 22HP with the cam.
What ignition timing are you running on the 274cam. I got this cam and I’m sitting at 14 degrees advance ignition timing and I’m getting a off idle falls on it’s face then gos. Any ideas.
It's mild cam. Plus brands do the fittings themselves and provide enough info for you to see if you're gonna need to do extensive mods. Cylinder head upgrades might need longer valves. But they'll tell you. What's the max cam you can run.
A ton of mustang guys go the route of 306. So a 306 on a summit video isn't too far from target audience. However, it should have stated 306 in the title rather than 302. No biggie. This cam and valve spring upgrade would be good for us 302 guys. Hell, even just upgrading your springs would do a lot of good. Stock springs suck.
Hi Vada, Any time mechanical engine modifications are added like camshaft, rocker arms, or cylinder heads, piston-to-valve clearance needs checked. There are too many variables beyond valve lift to give a direct answer; things like cam lobe separation, duration, valve size, combustion chamber, and valve relief design all factor in the equation.
Hi Homie, we are not sure which tool Richard used specifically. However, we can recommend PRO-66832 which is well rated and a pretty good value. www.summitracing.com/parts/pro-66832
Did a similar cam swap on a 302 Ford with a Crane hydraulic flat tappet from Summit. Could not get the engine to fire, Degree'd, valve springs, lifters, custom pushrods, etc. Changed the ignition, went over firing order by cam card dozens of times, pulled the front cover check the timing again backfiring, no start. Got to thinking Ford used a different firing order on 351's, so tried that and it fired right up. The cam was ground on the wrong firing order for the cam number stamped on it!!!!! It went flat after so many starting tries, now Crane wants to just replace the cam if I send it to them. I had to rebuild this engine because of negligence!!!!!! What do you think?
You’re in the wrong. The 5.0 HO firing order is standard for aftermarket cams. Same as the 351 firing order. You’re lucky they will even warranty the cam.
@@iqinsanity Apparently you cannot read!!!!! The firing order on the cam card and the number on the cam was different than the cam!!!! It is NOT a late 5.0 but a 79 302. But never mind trying to explain to someone so uneducated they cannot understand anyway.
I can read, and I’m not stupid enough to keep cranking and cranking when it’s not starting to the point it causes engine failure. Misprints happen, no one told you to beat a dead horse until total failure.
I know you always use this cam in these engines, but why doesn't Comp Cams call the cam an xe274hr? Is it on the box? There website doesn't even list any cam by that name, not that I could see. If I google that, not one retailer comes up with results that use the name "xe274hr." I have to match up the specs from the video to make sure I'm looking at the same cam.
I have 2 friends with stock motors with cams, one had a e303 with 3.73 gears, one had a bcam with 3.55 gears. Both of those cars were slower then my bone stock ho motor with 2.73 gears from a 30 roll. While i do not have hp numbers for you this was our experience
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Not surprisingly the heads needed valve springs. Seen it way to many times on the BP motors.
what cam did it have before??
Just ordered this
We appreciate your business, Anthony!
What compression . no dyno chart where did it make more power this video is to short on information
I love how these always start out with "a fresh 306 crate motor from blueprint engines"....yeah, like the majority of us have the budget to just order up a fresh 306 crate. How about a real world test on a stock 302 the average guy would be working on?
You would get about the same 10 percent increase on your stock 302 that you saw in the video on the crate engine. If you had a stock 302 with 220HP it would roughly gain about 22HP with the cam.
Stock ET7 heads flow like crap. A cam swap would net little gain over stock. Richard has tons of 5.0l videos on his channel. Check them out.
What ignition timing are you running on the 274cam. I got this cam and I’m sitting at 14 degrees advance ignition timing and I’m getting a off idle falls on it’s face then gos. Any ideas.
Piston to valve clearance? Always check with a cam swap.
It's mild cam. Plus brands do the fittings themselves and provide enough info for you to see if you're gonna need to do extensive mods. Cylinder head upgrades might need longer valves. But they'll tell you. What's the max cam you can run.
Any tests for XE270HR-12 , or crane 2031? These cams are advertised be paired with 1.7RR.
A ton of mustang guys go the route of 306. So a 306 on a summit video isn't too far from target audience. However, it should have stated 306 in the title rather than 302. No biggie. This cam and valve spring upgrade would be good for us 302 guys. Hell, even just upgrading your springs would do a lot of good. Stock springs suck.
302 to 306 just to clean up the bore is all of nothing more than 1/2 a hp.
What were the flow numbers on the head?
That would be nice to know
What cam was used 1st???
Will this 274 comp cam work on stock pistons with 1.6 rocker
Hi Vada, Any time mechanical engine modifications are added like camshaft, rocker arms, or cylinder heads, piston-to-valve clearance needs checked. There are too many variables beyond valve lift to give a direct answer; things like cam lobe separation, duration, valve size, combustion chamber, and valve relief design all factor in the equation.
What tool did you use to swap out the springs? Do you have a pet number on that tool?
Hi Homie, we are not sure which tool Richard used specifically. However, we can recommend PRO-66832 which is well rated and a pretty good value. www.summitracing.com/parts/pro-66832
Go to O'reillys look for it in the tools sections, its like 14 bucks. Thank me later
Did a similar cam swap on a 302 Ford with a Crane hydraulic flat tappet from Summit. Could not get the engine to fire, Degree'd, valve springs, lifters, custom pushrods, etc. Changed the ignition, went over firing order by cam card dozens of times, pulled the front cover check the timing again backfiring, no start. Got to thinking Ford used a different firing order on 351's, so tried that and it fired right up. The cam was ground on the wrong firing order for the cam number stamped on it!!!!! It went flat after so many starting tries, now Crane wants to just replace the cam if I send it to them. I had to rebuild this engine because of negligence!!!!!! What do you think?
Has nothing to do with this video.......
You’re in the wrong. The 5.0 HO firing order is standard for aftermarket cams. Same as the 351 firing order. You’re lucky they will even warranty the cam.
@@iqinsanity Apparently you cannot read!!!!! The firing order on the cam card and the number on the cam was different than the cam!!!! It is NOT a late 5.0 but a 79 302. But never mind trying to explain to someone so uneducated they cannot understand anyway.
I can read, and I’m not stupid enough to keep cranking and cranking when it’s not starting to the point it causes engine failure.
Misprints happen, no one told you to beat a dead horse until total failure.
@@iqinsanity I think it takes a fat lady to weigh a ton ...
Go back to trying out for the flagger position on pinks
Anyone know what size carb was used?
Holley 650, look with your eyes
I know you always use this cam in these engines, but why doesn't Comp Cams call the cam an xe274hr? Is it on the box? There website doesn't even list any cam by that name, not that I could see. If I google that, not one retailer comes up with results that use the name "xe274hr." I have to match up the specs from the video to make sure I'm looking at the same cam.
Would it kill you just swap the cam and valve springs on a stock engine? If you have. Link please.
Why it would literally choke with the stock cylinder heads. Want similar gains. Get similar parts.
@@MrDevilldogg666 ya. But just once I would like to see the results.
I have 2 friends with stock motors with cams, one had a e303 with 3.73 gears, one had a bcam with 3.55 gears. Both of those cars were slower then my bone stock ho motor with 2.73 gears from a 30 roll. While i do not have hp numbers for you this was our experience
What size rockers 1.6 or 1.7????
The video does not specify the rocker ratio. Based on the valve lifts specs listed in the video its does appear to be 1.6 ratio rockers, though.
No solid baseline due to valve float. Video made this way too complicated and moved way to fast with too little information.
Lot's of info, you can see the original cam had already nosed over before the valve float.
Richard holdener has his own channel where he goes more in depth
Which valve spring kit should I use with this cam on stock e7te heads
This cam is WAAAAY too much for a E7TE head
@@linctexpilot8337 he used that cam on e7te heads with upgraded spring , check his channel he got 30hp from xe274 swap