twin 60's... swaping from stock exhaust to 3" duals worth 86rwhp
12-13-2009, 10:18 PM
#1
twin 60's... swaping from stock exhaust to 3" duals worth 86rwhp thanks tom at c&s dynoshop. this car is running hard! here are pics of my before and after exhaust >> http://neufamily.org/images/g8gallery/index_2.htm
before 477rwhp/504rwtq
after 563rwhp/575rwtq
thats 86hp and 71tq by dumping the stock exhaust and going with the dual 3". boost is the same, a/f still low 11's, meth still on full. that is with an extra 2deg of timing at 16deg now. the previous run was at 14deg and gave us 552hp, 14deg is what the timing we ran with stock exhaust.
next plan is to run it to the local dynojet and see what kind of numbers we see there. then as some point toss in this cam i have had laying around.
before 477rwhp/504rwtq
after 563rwhp/575rwtq
thats 86hp and 71tq by dumping the stock exhaust and going with the dual 3". boost is the same, a/f still low 11's, meth still on full. that is with an extra 2deg of timing at 16deg now. the previous run was at 14deg and gave us 552hp, 14deg is what the timing we ran with stock exhaust.
next plan is to run it to the local dynojet and see what kind of numbers we see there. then as some point toss in this cam i have had laying around.
12-14-2009, 10:13 AM
#2
Big gains Jim. Really like the way it spools faster now. I replied to your questions about scaling tables with HPT on the other forum.
__________________
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
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
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
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
12-17-2009, 09:29 PM
#7
Hey Jim how am I supposed to catch up to you if you keep putting more mods on your car?!?!? Man when I get back from my 7 month "vacation" to Afghanistan I will have to get on the ball with the turbocam, tranny build, and bottom end build for this thing! By that time you will probably be in the single digits damnit. lol. Good numbers especially from a MD.
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12-22-2009, 08:24 AM
#9
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Jim,
Congrats on the new numbers.
I've never resigned up on the GMmod board but browse through it every once in a while.
I need to get off my but get a motor built and send the hawk out to ya for a couple twins install.
Hope all is well.
Congrats on the new numbers.
I've never resigned up on the GMmod board but browse through it every once in a while.
I need to get off my but get a motor built and send the hawk out to ya for a couple twins install.
Hope all is well.
12-22-2009, 01:39 PM
#11
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Parish,
What mufflers are those? I've got a turbo car as well and went from open DP to 2.5" duals with no mufflers. This is a different motor so I can't compare numbers like you...but those muffs must flow to give you that kind of increase.
good job!
What mufflers are those? I've got a turbo car as well and went from open DP to 2.5" duals with no mufflers. This is a different motor so I can't compare numbers like you...but those muffs must flow to give you that kind of increase.
good job!
12-29-2009, 06:07 AM
#15
never got any good numbers on the dynojet. ran into issues. i think the problems are mostly related to my meth kit. it is hard to get the a/f ratio dialed and then when you do it doesn't stay dialed in. add or pull a little boost and the a/f ratio is all off even though we tuned it in that area.
all this screwing around tuning takes time. i might just toss a squirt on there for the fueling and run the meth off the squrit too. i can tune that thing on the fly in very little time.
all this screwing around tuning takes time. i might just toss a squirt on there for the fueling and run the meth off the squrit too. i can tune that thing on the fly in very little time.
