black04silverado

iTrader: (5)

Last weekend i raced a mostly stock g8 gt
we raced 4 or 5 times with the same result.
g8 mods exhaust no cats and a dyno tune A6 310hp.
V mods muffler delete and tune M6 no dyno numbers.

from a 40 roll we were side by side no body pulled dead even!
25 roll i pulled half a car down low but thats it side by side the rest of the race.
I really expected to pull him.. but overall a damn close race.
Im getting rid of my cats and replacing the resonator with an x pipe maybe that will give me the power i need to pull him.

marc97taws6

iTrader: (6)

The G8's dyno-tune numbers seem pretty low for those mods

Anyway, good runs and good kill on the roll. Try LT's, ORX, and a new catback exhaust and see what happens

black04silverado

iTrader: (5)

its a stock exhaust he just cut the cats and mufflers out.
but yes i agree.

WSsick

iTrader: (13)

The tune really wakes the GTs up. They put down some pathetic numbers bone stock because of all the computer "aids" holding them back. Sounds just about like it should, with similar weights making similar power.

RedHotG8

iTrader: (1)

The G8 is no slouch with a tune and an intake. It was driving a totally different car after I added those mods. Plus the stock trans tune is lame, so the tune also makes the A6 shift so much better too. Add some headers, remove the DOD and add a nice cam, and it really unleashes the power since it has LS3 style high flow heads.

Deuuuce

Agreed, G8 dyno number seems low for those mods. Nice run.

black04silverado

iTrader: (5)

Well damn looks like i have to get some go fast parts together faster then he can so i can stay on top!!

itsslow98

iTrader: (18)

im suprised you didnt pull up top as well, grab some long tubes and leave the exhaust the way it is.

black04silverado

iTrader: (5)

I'm going to the exhaust shop this weekend to get the cats taken out and a x pipe put in.
I will update and let you know the results. I think the cats are really holding me back.
I cant afford headers at the moment so this is my cheap way out.

itsslow98

iTrader: (18)

u might be lucky to see 5hp from what your getting done. youll get some raspiness and popping though.

black04silverado

iTrader: (5)

well if we are dead even now the 5hp might just be enough to pull him.

RedHotG8

iTrader: (1)

If you remove the cats you'll need to retune the motor to take advantage of the added exhaust flow. Plus you need to have the code removed for the O2 sensors or you'll get a check engine light.

black04silverado

iTrader: (5)

i have already had the rear o2's deleted in the tune.

ScreaminRedZ

iTrader: (3)

Good race! My money would have been on the CTS-V all day, but what are you gonna do.

There is no 1:1 gear either.

The Manalishi

iTrader: (3)

Seriously?

ScreaminRedZ

iTrader: (3)

3rd gear is 1.532
4th gear is 1.152
5th gear is 0.852

I dynoed mine in 3rd because it would have hit the stock speed limiter in 4th.

The Manalishi

iTrader: (3)

Didn't know that. Learn something new everyday. Thanks.

Sticks n Stones

Hey Screamin: what is your MPG? I'm looking for a daily driver and always loved the G8's. If I got it I'd just keep it to CAI, Tune, LT's, and ported intake. All the things that should free up power without hurting fuel economy.

RedHotG8

iTrader: (1)

That's because you have the stock tune, an aftermarket tune turns the G8 into a totally different car. The 1.152 ratio in 4th means it will pull harder than if it was a 1:1 ratio, which makes the car quicker. So it's helping the car, not a handicapping it.

RedHotG8

iTrader: (1)

I'm getting 15mpg but I do mostly city driving. Plus I have AFM disabled since it's so annoying.