redyno day for the l92 408
redyno day for the l92 408 me and sean over at collins automotive had our disagreements but he made everything good it just sucks haveing a dad breathing down your neck 24/7 
but im a happy camper
anyways the low down
408
around 11:1 c/r
Synergy Motorsports cam (236 duration)
ls7 lifters
stock untouched l92 heads
stock l92 rockers
stock l92 valves
stock l76 intake with holley 90mmtb
1 7/8 headers to catless 3in td's
a/f 12.7 across the board
26* of timing
threw a t56 and stock 10 bolt on 18 wheels if that matters
475 HP@6300
442 TQ@4800
overall im very happy for basically a stock topend, thought the torque was gonna be a lil more but
im thinking next year some trick flow heads and a bigger cam 550whp?
but im a happy camper anyways the low down
408
around 11:1 c/r
Synergy Motorsports cam (236 duration)
ls7 lifters
stock untouched l92 heads
stock l92 rockers
stock l92 valves
stock l76 intake with holley 90mmtb
1 7/8 headers to catless 3in td's
a/f 12.7 across the board
26* of timing
threw a t56 and stock 10 bolt on 18 wheels if that matters
475 HP@6300
442 TQ@4800
overall im very happy for basically a stock topend, thought the torque was gonna be a lil more but
im thinking next year some trick flow heads and a bigger cam 550whp?
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From: Western Burbs of Detroit
lean her out a bit and try throwing another 2 degrees of timing and see if she picks up a bit more power. Or did you already do that and backed it off and enriched the fuel for safety ???
11:1 compression, seems like she'd like a bit more comp too. Just a few comments for ya, not saying anything negative. BTW Mustang Dyno's are notorious for low torque numbers from what I hear and from what I've seen.
Good numbers, will get better next year if you go with more cam and the TFS 235's
11:1 compression, seems like she'd like a bit more comp too. Just a few comments for ya, not saying anything negative. BTW Mustang Dyno's are notorious for low torque numbers from what I hear and from what I've seen.
Good numbers, will get better next year if you go with more cam and the TFS 235's
from like 5 calculators online im between 11.0 and 11.4 but idk for sure
sean said thats the max those heads can handle so idk if he did or not, no biggie
im guessing the a/f is for saftey
sean said thats the max those heads can handle so idk if he did or not, no biggie
im guessing the a/f is for saftey
im not to familuar on the differences between dynos
how do you sae correct it as well?
im running tr6 plugs in it not sure what the gap comes from ngk since i was told not to gap them, i think i might pull em and check em
how do you sae correct it as well?
im running tr6 plugs in it not sure what the gap comes from ngk since i was told not to gap them, i think i might pull em and check em
Last edited by 89Formulaws6; Jun 13, 2008 at 05:55 PM.
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Nice power for some stock un-touched parts. My 402ci with the same set up but ported heads and a 248cam did 517hp 468tq mustang dyno also.I'm at 30deg timing on my set up. I can't wait for fast to get an intake on the market. should be good for another 25hp.
Sean's dyno reads pretty low. You could have 525 rwhp Dynojet hp on your hands. If those numbers matter to you, take it to a Dynojet and see what it does.
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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
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.
yeah that'd be pretty cool, then i dont have to hear about how i spent more (like 500 bucks lol) then my buddy who did a h/c combo on his auto ls1 and made 418whp
