gomer

iTrader: (13)

My brother bought an 05 M6 LS2 GTO a couple of months ago and finally got it on the dyno this past Saturday. I was really impressed with the power it made. The car is bone stock down to the paper filter. At the time the dyno was done the car had 2,300 miles on it. It was also running VERY rich on the top end. I wish HPtuners would hurry up with their LS2 stuff Right now his plans for the car is to get about 7-8,000 miles on it and add some headers and a small cam, along with a pulley and good exhaust to it.

Checkmate

iTrader: (2)

Nice #'s, a little rich though.. I see GM is still adjusting the tunes so the vette stays on top.

gomer

iTrader: (13)

Yep, I wish HPtuners would get on the ball and finish up the LS2 software I'd like to see what it would do "tweaked in".

Worm

iTrader: (2)

Wow, bump the timing and lean it out. It'd pull 355. Thats pretty stout though.

Wicked_Hugger99

iTrader: (1)

damn! stout as hell for a stocker. that puts it right at the 400FWHP given a 15% loss. Nice!
i agree w/ the hptuners ( once it gets out ) u'll pick up a good bit but of course you already know that gomer

niphilli

My z06 was 11.5:1 from the factory

I would not call that VERY rich. Maybe 5 ponies on the table,but if it were my personal car I would leave it alone. Even after headers / cam I would only tune it to 12.5 or so. Just IMHO

ls1charged

iTrader: (8)

very nice numbers and you can lean it out if youre staying on motor...any power adders in the future and you better be ready to get rich,and not in the pockets.

xfactor_pitbulls

iTrader: (16)

Thats what I was thinking. Even at the richest, the A/F is close to 12:1. Thats pretty damn close. On the street it is probably closer to 12.75:1. Which is pretty close to spot on. The bottom end looks more lean than the top end looks rich, IMO of course, no pro here.

Brandon

gomer

iTrader: (13)

I've had pretty good luck with my car running it where most people consider it "too lean", so that's the plan for the GTO too. I'd like to know how much timing it is getting too.... man, waiting for this software is going to be a bitch.

TheBowtieboy

iTrader: (6)

I challenge that comment.

I have seen on many occations where a LS1 running rich in the low 12's pick up at least 7-8 RWHP, and if you look closely the car is at aprox 11.9 in the high RPM's, where the car makes peak HP.

If I were to make an educated guess, I would venture to say 10-12 RWHP at a dyno reading of 12.7-12.9 (conditions being equal)

_HAVOC_

iTrader: (5)

id say there is 20 rwhp to be gained with a good tune! take her up to 13.3 afr!

rotwiler

iTrader: (1)

Nice #'s, my 02 A4 Z28 with LT's, high flow cats, predator tune, fipk, tb bypass and catback put down almost the same exact #'s just a tad little more torque. Nice to know GM is still underating their h.p #'s.

AOC

Nah, my bone stock Z06 was running very rich, it was 11:1. The optimum AFR should be in the range of 12.8 - 13.2

02NBMFormula

iTrader: (6)

what kinda of dyno??? dyno jet, mustang, eddie current?

gomer

iTrader: (13)

It was a dynojet.

Mike98WS6

iTrader: (5)

Nice numbers gomer for a stock 05 GTO. I'm impressed.

Mike K.

damn good numbers for a stock car.

JZ'sTA

iTrader: (23)

I am impressed.
Who can complain about 350 RWHP stock in a family sports car?

UtOhCop

I thought the LS2 horsepower peaked at 6000.. Not 5600

JEB99TA

iTrader: (32)

Dang good numbers ...congrat's