madmike9396

iTrader: (29)

Swapped a fresh L76 into my Trans am. i Kind of have mixed emotions about the dyno results. i had already planned this build for my 5.7 but it decided it didnt want to live after my 2nd 1/4 pass and blew the #7 piston apart. So i picked up a l76 short block and rebuilt it.

Mod List......
L76 from a G8
SLP Lid
Stock MAF
Advanced Induction 241s 219cc package
.40 cometic head gasket
227/234 .600.600 111 LSA TSP cam
Fast 92 mildy ported
Warr 92 mm Tb
Speed Engineering 1 7/8 long tubes
Speed Engineering true dual full exhaust
Yank PT4000
Performabuilt lvl 2 trans
Quick Performance 9" with spool & 390 gear

Ended up making 426 rwhp and 378TQ on a dynojet

was hoping for 450 but i believe i will need a better head and more compression to reach that goal.

the end results will be at the track and that will determine if i have to pull these heads or not lol

pretty satisfied with the track results. these times are off idle.

zzracer

iTrader: (33)

Didn't like the nitrous.

JonCR96Z

iTrader: (33)

I thought it was a 5.3 with a 100 shot. Thats how I tuned it anyway.

You"re lucky that Bobby dont know how to swap injectors or that white truck would give you some trouble.

madmike9396

iTrader: (29)

lmao.....

madmike9396

iTrader: (29)

I think it had low bottle pressure LOL....

Tuskyz28

How much compression on the motor ?

madmike9396

iTrader: (29)

The best I could figure was 10 9 1. the guy I got the heads from said they hadn't been milled. so those numbers are based off stock 241 chamber #s

LilJayV10

iTrader: (39)

It has a stall and a 9 inch. Take it to the track and move on with your life.

madmike9396

iTrader: (29)

exactly! that's why I hope it runs good at the track.

LSX416ci

I have a used set of 243’s for sale. There are many places that port these and you would definitely get a good jump in power. Nice numbers

BlueMaro00

Man damn, I finally make an account to see what everybody else was putting down with 6.0s and ended up finding ole Mike lol.

We’ll see what kind of power I can out of my lq. I plan on using some Summit flat tops to get my compression up 11.5:1. Did a lot to help mine breathe and get the most from my hog *** MS4 cam so Im expecting some good numbers this time around but won’t know till I get her back on the rollers.

caviness

iTrader: (14)

bluemaro00 where you get that car ? good job on your work madmike

zzracer

iTrader: (33)

Bluemaros's car made good power to have a LS1 intake on it. Mikes car well it's okay I guess. 😂

jmilz28

iTrader: (13)

Super solid for a high stall auto and a 9inch. See what the track says at the big end with DA figured in, then you'll know. I'll bet you run faster than the dyno suggests.

zzracer

iTrader: (33)

Stall doesn't matter since it was locked on the dyno and I'm just messing with Mike.

madmike9396

iTrader: (29)

lol.... i bet you make some good numbers once you get her back together !

madmike9396

iTrader: (29)

thank you !

lsxjon03

Go LS3 top end!😎

MonmouthCtyLS7

iTrader: (6)

Not sure if thats good, my 99 C5 auto w/ ported 241's and a mild cam put down more. I'm sure all dyno's vary.

madmike9396

iTrader: (29)

True, I have learned that dyno numbers dont mean squat. I've seen where guys put down 475 rwhp on the dyno and only trap 115 In the 1/4 🤣

how did you're car do at the track ?