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LS3 Vette gains 67rwhp, 40rwtq with cam, LS7 exhaust, bolt-ons

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Old 09-03-2008, 09:23 AM
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Default LS3 Vette gains 67rwhp, 40rwtq with cam, LS7 exhaust, bolt-ons
A user on the Corvette forum wanted a real clean, stealthy setup, without the hassles of headers. He swapped the LS3 exhaust manifolds/exhaust for LS7 manifolds/exhaust, then added:
Custom Comp Cam, spec'd by Patrick G 218/230 .563/.573 on 115lsa +0, Comp XE lobes
PAC beehive springs, comp titanium retainers, comp 7.425 pushrods
Cometic .040 head gaskets for 11:1 static compression
LS7 Exhaust Manifolds with Cat Pipes
Dr Gas 3" X-pipe
ATI 10% underdrive pulley
Yella Terra roller rockers
More details here: http://forums.corvetteforum.com/show....php?t=2118422

Nice gains:
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2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
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Old 09-03-2008, 09:29 AM
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that looks like a nice setup
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Old 09-03-2008, 10:17 AM
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That thing looks like it could have pulled a couple hundred more RPM as well, nice.
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Old 09-03-2008, 10:21 AM
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Nice cam work. I wouldnt be surprised if he ends up installing LT's at some point though once he gets used to the power.

Pat you have a PM.
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Old 09-03-2008, 10:36 AM
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Nice!

I'm not a math whiz, but it actually looks like it gained 78 RWHP and 47 RWTQ, not 67 and 40.

Unless there's an explanation on the corvette forums. I didn't click the link.
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Old 09-03-2008, 10:53 AM
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very impressive patrick, that give me ideas for the cali guys over here ,trying to keep smog legal
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Old 09-03-2008, 01:09 PM
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That is pretty amazing. Good job PAT G !!
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Old 09-03-2008, 01:16 PM
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Looks like a pretty solid setup for the goals. Just out of curiosity, what are the stock cam specs on the LS3?
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Old 09-03-2008, 07:00 PM
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damn, i wouldn't have expected a cam of that size on a 115 lsa to hold peak power like that...nice.

i assume having no advance contributed to this?

nice numbers, badass setup on manifolds.
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Old 09-03-2008, 08:21 PM
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Nice job on the cam. These L92 style heads like a big split!
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Old 09-05-2008, 08:48 AM
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Headers would really wake that thing up. Manifolds and a cam??? I would of talked him out of that idea.
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Old 09-05-2008, 08:59 AM
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Damn, those LS3's impress me more all the time. Might be time to start planning a stroker combo for down the road myself, lol.
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Old 09-05-2008, 09:00 AM
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Originally Posted by WHPLASH
Headers would really wake that thing up. Manifolds and a cam??? I would of talked him out of that idea.
I don't know...

Stock NVH and stock drivability, but with LS7 power is pretty attractive. Not everyone wants a loud, rough, unrefined road rocket.
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2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
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Old 09-05-2008, 09:04 AM
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actually headers do not make much more power over the ls7 manifolds, it shocked me but they dont im not speaking from hear say i saw it with my eyes.
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Old 09-05-2008, 09:41 AM
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^Then why do people with C6 Z06's install headers?
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Old 09-05-2008, 10:52 AM
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you get some power but not a tremendous amount, the ones that i installed only picked up 10hp and 13tq, yeah it made more power but i dont know if it enough to justify $2k
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Old 09-05-2008, 12:29 PM
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no intake? I know those vettes love the varacrams. And it looks like you gained 87 horsepower and 47 lbs of torque.
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Old 09-05-2008, 12:56 PM
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Great job Pat & really impressive gains right there buddy

peace
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Old 09-06-2008, 08:21 AM
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Originally Posted by craze4speed
you get some power but not a tremendous amount, the ones that i installed only picked up 10hp and 13tq, yeah it made more power but i dont know if it enough to justify $2k
When people go from 440 rwhp to 500 rwhp with bolt-ons, is most of that gain coming from the tune? Just trying to figure it out.
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Old 09-06-2008, 09:54 AM
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I thought I read where the ls7 manifolds are pretty good and flow pretty well, so that's a nice balance between performance and streetability.
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