Ls3 Heads/Cam record results
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Le Mans Master
Joined: Nov 2003
Posts: 8,308
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From: NJ
Ls3 Heads/Cam record results
We recently beat the Ls3 heads/Cam record with a mild street package that was designed for a future Procharger.
Congrats to Matt (Tune Time) and Gary for running a 10.37 and 134+ mph.
Mast heads
Custom Cam
4.10 gears
American Racing Headers
RPS Clutch
After thinking it over and seeing the results of some of the ls3 headed cars we've done, we feel confident that we can match, if not exceed, the performance above with our ported stock LS3 heads and cam package.
And maintain great driveability. I can get more detals if people are interested.
If there was an interest in an all out max effort combo for those who are focussed on ET drag strip results we could make that happen too. With the right driver we're looking at 9 something and near 140mph in great air.
Congrats to Matt (Tune Time) and Gary for running a 10.37 and 134+ mph.
Mast heads
Custom Cam
4.10 gears
American Racing Headers
RPS Clutch
After thinking it over and seeing the results of some of the ls3 headed cars we've done, we feel confident that we can match, if not exceed, the performance above with our ported stock LS3 heads and cam package.
And maintain great driveability. I can get more detals if people are interested.
If there was an interest in an all out max effort combo for those who are focussed on ET drag strip results we could make that happen too. With the right driver we're looking at 9 something and near 140mph in great air.
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St. Jude Donor '08-'09-'10-'11
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St. Jude Donor '08-'09-'10-'11
Drifting
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From: Avon Indiana
St. Jude Donor '09
To set the record straight, my LS3 heads from SDPC are actually LSA cores that they start with. I wasn't aware of this until I tried to bolt my stock LS3 intake on and the dowels pegs didn't line up. After almost 2 hours on the phone with scoggins we figured it out. If others are picking up power by switching from lsa to ls3 heads then I feel cheated..lol just kidding.
To say that max power can't be made with ls3 heads can't be completely accurate. I ran over 105mph in the 1/8 with a completely stock bottom ls2 and over 131.5 mph in the quarter with only 3.42 gears. That was done with a stock LS3 intake that I ported in my garage in little over an hour. Point being that with professional parts I might have went quicker. My cam is not terribly big but is decent size. Also I'm running stock rockers.
Congrats on that run Matt, Gary and Rob.. There's more in it!
To say that max power can't be made with ls3 heads can't be completely accurate. I ran over 105mph in the 1/8 with a completely stock bottom ls2 and over 131.5 mph in the quarter with only 3.42 gears. That was done with a stock LS3 intake that I ported in my garage in little over an hour. Point being that with professional parts I might have went quicker. My cam is not terribly big but is decent size. Also I'm running stock rockers.
Congrats on that run Matt, Gary and Rob.. There's more in it!
Last edited by stanger383; Nov 23, 2012 at 09:15 PM.
Le Mans Master
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St. Jude Donor '11-'12-'13-'14
I don't remember, what was the fix for that issue?
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St. Jude Donor '09
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Tech Contributor
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From: Colorado Springs, CO
St. Jude Donor '08-'09-'10-'11
To set the record straight, my LS3 heads from SDPC are actually LSA cores that they start with. I wasn't aware of this until I tried to bolt my stock LS3 intake on and the dowels pegs didn't line up. After almost 2 hours on the phone with scoggins we figured it out. If others are picking up power by switching from lsa to ls3 heads then I feel cheated..lol just kidding.
To say that max power can't be made with ls3 heads can't be completely accurate. I ran over 105mph in the 1/8 with a completely stock bottom ls2 and over 131.5 mph in the quarter with only 3.42 gears. That was done with a stock LS3 intake that I ported in my garage in little over an hour. Point being that with professional parts I might have went quicker. My cam is not terribly big but is decent size. Also I'm running stock rockers.
Congrats on that run Matt, Gary and Rob.. There's more in it!
To say that max power can't be made with ls3 heads can't be completely accurate. I ran over 105mph in the 1/8 with a completely stock bottom ls2 and over 131.5 mph in the quarter with only 3.42 gears. That was done with a stock LS3 intake that I ported in my garage in little over an hour. Point being that with professional parts I might have went quicker. My cam is not terribly big but is decent size. Also I'm running stock rockers.
Congrats on that run Matt, Gary and Rob.. There's more in it!
OK so I'm back to my original opinion of aftermarket Vs ported LS3 stockers.
Thanks for sharing your complete build info. Its rare to have people share like that.
Le Mans Master
Joined: Nov 2005
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From: Kendall Park NJ
I guess we have to take some stock LS3 heads, port them, and have them run low to mid 10s in streetable combination. 
Rob- It's becoming quite arduous to do what we say we can do. (again)
Rob- It's becoming quite arduous to do what we say we can do. (again)
Thread Starter
Le Mans Master
Joined: Nov 2003
Posts: 8,308
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From: NJ
We've seen the ls3 heads make big power with an experienced head porter and a few different cams. As these performance packages make it to the street the numbers will trickle in and I already know the possibilities.
Thread Starter
Le Mans Master
Joined: Nov 2003
Posts: 8,308
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From: NJ
If we took a beefy mast head and ported it to its ultimate limit with a professional who specializes in drag racing then I have no doubt we could make more power with the aftermarket product provided we utilize all of the flow and other characteristics of the head to our advatange with rpm and other things.
But lets face it, the driveability will suffer immensely and you are looking at maybe $6000 + just for the heads and port work and that can take up to 6 months of time.
I'm saying it makes sense to take your existing heads that you know will fit perfectly and upgrade them because we are now confident that they make big power without a big loss in driveability.
Or swap your your ls2 heads for ls3 and see huge gains. Take advantage of other peoples R&D that have proven results and utilize as many gm parts as possible to save money, and you know they already work and fit. I bet it would be difficult to find someone who knows more than I do about the frustrations of aftermarket parts on these late model vettes.