Midnight00SS

Looking to buy one but i see the 6.0 comes with only 361 hp?? can this be right i thought they had 400hp like the 05 gtos? im confused, can anyone help me

GMCHammer

iTrader: (4)

Because of AFM the cam shaft is smaller then what you would find in a LS2.

Stock G8 L76 cam: 200/208 .472/.479 116 LSA

Stock GTO LS2 cam: 204/211 .525/.525 116 LSA

RedHotG8

iTrader: (1)

An intake and tune will bring it to 400hp and you can disable AFM too.

GXPPOWER

i dynoed 340 rwhp 350 tq with my only Real mod being gutted cats, and a smooth intake pipe to the stock airbox. so im actually now at would be considered 400+ crank hp..

Torqued

Great mph for the lack of $ mods. I have run similar, but with the mods in my sig.

BMW540-G8GT

I would love to hear your exhaust.... any video clips?

I like how the stock mufflers sound when I step on it but around town it’s too quiet.

SLOW SEDAN

iTrader: (13)

Yeah stupid DoD! I would get rid of it... the 2009 also has a few less hp because they installed an extra set of cats that werent on the 08's.

Just for comparison to your specs above here are the LS9 cam specs:

211/230 .558/.552 122.5

Its only a $100 cam from GM, replace the lifters with LS7 units, pushrods, valley cover. You have a cheap DoD delete kit that might only cost you $500 and have a nice 40+hp gain.

RedHotG8

iTrader: (1)

Hey Slow does the LS9 cam have a lope to it?

SLOW SEDAN

iTrader: (13)

None, idles like stock.

RedHotG8

iTrader: (1)

That won't cut it, if I install a performance cam I want people to know my car has a cam.

Midnight00SS

ok i see now i wasnt aware of this, didnt know about the afm unit either, im amazed it runs on 87 octane also lol

RedHotG8

iTrader: (1)

The ECM pulls timing if you run regular gas, so you're losing some power. I tuned mine to run on premium and I can feel the difference.

SLOW SEDAN

iTrader: (13)

I took out my 235/242 .618 114 and everyone knew within a half mile that the car was cammed... it was fun but after two years with that setup I wanted something a bit different.

Now I have the OEM LS9 cam, car idles like stock, and is faster! Granted I added a blower... haha

ramairetransam

iTrader: (18)

if you get an 09.5 you have 355 hp

Jv9437

I just had the top end on my g8 worked on replace the lifters, springs, pushrods , bigger cam 240 duration to the exhaust with all ls3 parts . Put it on the dyno and it put down 373 rwhp

VINCE

iTrader: (1)

Stock exhaust and untouched heads I am guessing? That's a big cam.

Jv9437

[QUOTE=VINCE;19349138]Stock exhaust and untouched heads I am guessing? That's a big cam.[/QUOTE

It is a big cam, but I have magna flow exhaust and the heads were redone also before this was done . The only thing I have left to do is put on some long tube headers but havent decided which ones I want to put on. Do you have any suggestions on which ones are better?