So it looks like the G8 GT is underrated.

[AlmostFamous]

A guy I know just got a G8 GT. He dyno'd the car with 31 miles on the clock and I put down 324whp through the automatic.


http://forums.peddersusa.com/imagehosting/2647db808514d21.jpg


http://forums.peddersusa.com/imagehosting/2647db80880a7fb.jpg


http://forums.peddersusa.com/imagehosting/2647db8085dc01c.jpg


http://forums.peddersusa.com/imagehosting/2647db80a598e69.jpg


http://forums.peddersusa.com/imagehosting/2647db80a6651ca.jpg


http://forums.peddersusa.com/imagehosting/2647db80bb57353.jpg


http://forums.peddersusa.com/imagehosting/2647db80bc1eaca.jpg


So it's putting down LS2 numbers with that shitty cam. Talk about potential with the L76.

[Gomez909]

Holy choked up airbox Batman!!! :eek:

[Kman]

This has been known for awhile. One of the Aussie posters on here posted a G8 GT with mild bolt-ons running mid 11's.

[SIK02SS]

Haddad? where you located?

[GMCtrk]

that car looks fucking great in red!

[Hillbilly Deluxe]

That is a horrible airbox design :wtf:

I'm gonna have to go down to the local dealer and look at one in person :cool:

That car looks great, I've been waiting too see some real world pictures of the car.

[Kman]

Originally posted by El Kabong


That car looks great, I've been waiting too see some real world pictures of the car.

http://www.ls2.com/forums/showthread.php?s=&threadid=617119

[krispycobalt]

Originally posted by El Kabong
That is a horrible airbox design :wtf:

I'm gonna have to go down to the local dealer and look at one in person :cool:

That car looks great, I've been waiting too see some real world pictures of the car.

its handy dandy silencer :yup:

replacing it with some silicone hose or such should prove to be extremely easy

[mogs01gt]

Originally posted by SStick Bandit
Holy choked up airbox Batman!!! :eek:
I thought the exact same thing when I first saw it.

[habib]

lolmatic

[keliente]

Originally posted by AlmostFamous
[B]

Keep in mind that is on a dynapak.

[426HEMI]

Originally posted by keliente
Keep in mind that is on a dynapak.

They read high or low?

[JeffsSS]

Originally posted by 426HEMI
They read high or low?

[JeffsSS]

am i the only one who thinks it's a bad idea to put a car with 31 miles on a dyno?

[426HEMI]

Originally posted by JeffsSS
am i the only one who thinks it's a bad idea to put a car with 31 miles on a dyno?

Why?

[Kata Skopos]

break in a guess

[F1_SS]

Originally posted by JeffsSS
am i the only one who thinks it's a bad idea to put a car with 31 miles on a dyno?

Yes

[keliente]

Originally posted by 426HEMI
They read high or low?

IMO, higher, generally.

[Kata Skopos]

i hope the LS3s underated in it as well :cool: :D

[keliente]

Originally posted by JeffsSS
am i the only one who thinks it's a bad idea to put a car with 31 miles on a dyno?

No, you just have more self control than most people...myself included ;)

[Mark]

man that car is sexy. Dayum!

[46CALLAWAY]

Breaking in an engine on the dyno is the way to do it...

[Kman]

Originally posted by JeffsSS
am i the only one who thinks it's a bad idea to put a car with 31 miles on a dyno?

This isn't the 60's. Generally, it's better to go WOT when you first get a car. Sets the rings on the pistons.

[mogs01gt]

Originally posted by 46CALLAWAY
Breaking in an engine on the dyno is the way to do it...
yep!

[Rich97 W68]

I can't remember the location of the article, but it shows the assembly line of the G8. At the end of the line, the car is placed on a dyno... 0 miles...

[Jeffro]

I can't wait to see what these cars do with better induction and exhaust.

[NoRiceInside]

Originally posted by Kman
This isn't the 60's. Generally, it's better to go WOT when you first get a car. Sets the rings on the pistons. the rings are seated before you pick your car up. less than 5miles is more than enough on a street car

[krispycobalt]

Originally posted by Rich97 W68
I can't remember the location of the article, but it shows the assembly line of the G8. At the end of the line, the car is placed on a dyno... 0 miles...

Its called a hot test and every engine goes through it before getting shipped to the vehicle assembly plant (applies to most every carmaker I think).

[LS1POWERED]

nice numbers but what is with the tq curve, big dip between 3000 and 3600 rpm

[NoRiceInside]

Originally posted by LS1POWERED
nice numbers but what is with the tq curve, big dip between 3000 and 3600 rpm more than likely its TM'ed to death

[Dolemite]

Decent car, I would consider it if it had a nicer interior.

[Kata Skopos]

Originally posted by Dolemite
Decent car, I would consider it if it had a nicer interior.

nicer? how nice do you want it? :confused:

[GMCtrk]

Originally posted by NoRiceInside
more than likely its TM'ed to death

I thought the whole point of these new 6 speed autos was to be able to handle the power of these engines :Picard:

[Blade]

Dynopak?

Corrected for humidity and temperature?

Just seems 10-15rwhp too high. Newer GM cars aren't supposed to be underrated with the new HP validation standard in place.

[Rich97 W68]

Originally posted by krispycamaro
Its called a hot test and every engine goes through it before getting shipped to the vehicle assembly plant (applies to most every carmaker I think).

This wasn't an engine dyno. This was post-assembly car-on-rollers.

[krispycobalt]

Originally posted by Rich97 W68
This wasn't an engine dyno. This was post-assembly car-on-rollers.

interesting, guess they wanna hot test the whole car

[JeffsSS]

Originally posted by Kman
This isn't the 60's. Generally, it's better to go WOT when you first get a car. Sets the rings on the pistons.

weird.

there was a break in period on my buddys 08' Corvette.

From the 08' C6 manual:

New Vehicle Break-In
Notice: Your vehicle does not need an elaborate
break-in. But it will perform better in the long run if
you follow these guidelines:
• Keep your speed at 55 mph (88 km/h) or less for
the first 500 miles (805 km).
• Do not drive at any one speed — fast or
slow — for the first 500 miles (805 km). Do not
make full-throttle starts.
• Avoid making hard stops for the first 200 miles
(322 km) or so. During this time your new brake
linings are not yet broken in. Hard stops with
new linings can mean premature wear and
earlier replacement. Follow this breaking-in
guideline every time you get new brake linings.

[Jeffro]

This car did dyno high and I'm sure it was because of that dynapak. Another G8 dynoed 286 and then 310 after a tune which puts it in line with the 361 hp that GM is claiming.

http://www.autoblog.com/2008/03/19/2008-g8-gt-reaches-the-dyno-with-video/

[Kman]

Originally posted by JeffsSS
weird.

there was a break in period on my buddys 08' Corvette.

From the 08' C6 manual:

New Vehicle Break-In
Notice: Your vehicle does not need an elaborate
break-in. But it will perform better in the long run if
you follow these guidelines:
• Keep your speed at 55 mph (88 km/h) or less for
the first 500 miles (805 km).
• Do not drive at any one speed — fast or
slow — for the first 500 miles (805 km). Do not
make full-throttle starts.
• Avoid making hard stops for the first 200 miles
(322 km) or so. During this time your new brake
linings are not yet broken in. Hard stops with
new linings can mean premature wear and
earlier replacement. Follow this breaking-in
guideline every time you get new brake linings.

That's more for the rear end than the motor.

[CT Morgan]

As stated, it's just a dyno issue.

[JeffsSS]

Originally posted by Kman
That's more for the rear end than the motor.

I don't care if it's for the power windows.

Why would someone spend 30k+ and do that?

fuck.

I follow shit to a T.

[keliente]

Originally posted by Morpheus
This car did dyno high and I'm sure it was because of that dynapak. Another G8 dynoed 286 and then 310 after a tune which puts it in line with the 361 hp that GM is claiming.

http://www.autoblog.com/2008/03/19/2008-g8-gt-reaches-the-dyno-with-video/

Yep. We do not know what octane the dealership put in it - so I do believe there is more left in the tuning.

[still-asleep]

Originally posted by JeffsSS
I don't care if it's for the power windows.

Why would someone spend 30k+ and do that?

fuck.

I follow shit to a T.

Seems like more of an issue with the force applied to the rear end on the road during the break in period as to why they issue those guidelines. On a dyno, you don't have that force being applied since the rear tires are on the rollers of the dyno. Engine-wise, I don't think it needs any extended break in period.

[Jeffro]

Originally posted by JeffsSS
I don't care if it's for the power windows.

Why would someone spend 30k+ and do that?

fuck.

I follow shit to a T.

Good for you. There are plenty of people that have driven the shit out of their cars as soon as they signed the papers and seen no problems whatsoever. It probably says the same thing in the G8 brochure as what it says in the Vette because it says it in the 05 GTO brochure. It does tell you that the engine doesn't need an elaborate break-in. It's just a recommendation.

[JeffsSS]

Originally posted by Morpheus
Good for you. There are plenty of people that have driven the shit out of their cars as soon as they signed the papers and seen no problems whatsoever. It probably says the same thing in the G8 brochure as what it says in the Vette because it says it in the 05 GTO brochure. It does tell you that the engine doesn't need an elaborate break-in. It's just a recommendation.

well to each his own i suppose.

[tater]

Originally posted by JeffsSS
well to each his own i suppose.

It is 2008, not 1965.

[JeffsSS]

Originally posted by pre
It is 2008, not 1965.

This is printed in the owners manual of a brand new car, but I guess I'll ignore that because it's 2008, not 1965

:Picard: and like i said.. to each his own.

From the 08' C6 manual:

New Vehicle Break-In
Notice: Your vehicle does not need an elaborate
break-in. But it will perform better in the long run if
you follow these guidelines:
• Keep your speed at 55 mph (88 km/h) or less for
the first 500 miles (805 km).
• Do not drive at any one speed — fast or
slow — for the first 500 miles (805 km). Do not
make full-throttle starts.
• Avoid making hard stops for the first 200 miles
(322 km) or so. During this time your new brake
linings are not yet broken in. Hard stops with
new linings can mean premature wear and
earlier replacement. Follow this breaking-in
guideline every time you get new brake linings.

[Blade]

Originally posted by mavsfan41
Seems like more of an issue with the force applied to the rear end on the road during the break in period as to why they issue those guidelines. On a dyno, you don't have that force being applied since the rear tires are on the rollers of the dyno. Engine-wise, I don't think it needs any extended break in period. I don't know about that.... I hear both sides actually.

Perhaps dave1w41 can chime in...

[NoRiceInside]

Originally posted by Blade
I don't know about that.... I hear both sides actually.

Perhaps dave1w41 can chime in... a stang dyno loads the rollers hence lower, real world numbers. so a unloaded dyno doesnt hurt the driveline.

dave is waving the GM flag waaay to high to see clearly.



i have posted a number of times, the breakin nowadays is for the auto trans and rear gears. they need some heat cycles.

[WCFields]

Originally posted by JeffsSS
This is printed in the owners manual of a brand new car, but I guess I'll ignore that because it's 2008, not 1965

:Picard: and like i said.. to each his own.

From the 08' C6 manual:

New Vehicle Break-In
Notice: Your vehicle does not need an elaborate
break-in. But it will perform better in the long run if
you follow these guidelines:
• Keep your speed at 55 mph (88 km/h) or less for
the first 500 miles (805 km).
• Do not drive at any one speed — fast or
slow — for the first 500 miles (805 km). Do not
make full-throttle starts.
• Avoid making hard stops for the first 200 miles
(322 km) or so. During this time your new brake
linings are not yet broken in. Hard stops with
new linings can mean premature wear and
earlier replacement. Follow this breaking-in
guideline every time you get new brake linings. Actually this is complete bullshit.

Ever read the break in procedure from aftermarket brake pad/rotor vendors, you make several VERY HARD higher speed slow downs to set the pads in.

GM wants you trash the pads because they are wear items not covered by warranty, so when they wear out early from their "easy break in" they can charge you for them..

I just got my G5 GT and I did exactly what the aftermarket pad/rotor vendors say to do, several high speed slow downs without stopping and then a modest speed drive to cool them off. I'm willing to bet my pads last a long time.

[Kman]

Originally posted by JeffsSS
This is printed in the owners manual of a brand new car, but I guess I'll ignore that because it's 2008, not 1965

:Picard: and like i said.. to each his own.

From the 08' C6 manual:

New Vehicle Break-In
Notice: Your vehicle does not need an elaborate
break-in. But it will perform better in the long run if
you follow these guidelines:
• Keep your speed at 55 mph (88 km/h) or less for
the first 500 miles (805 km).
• Do not drive at any one speed — fast or
slow — for the first 500 miles (805 km). Do not
make full-throttle starts.
• Avoid making hard stops for the first 200 miles
(322 km) or so. During this time your new brake
linings are not yet broken in. Hard stops with
new linings can mean premature wear and
earlier replacement. Follow this breaking-in
guideline every time you get new brake linings.

I told you it was because of the force of the rear end needing to be broken in. Go talk to ANY high performance manufacture of motors and they will say Wide Open Throttle.

[DAFFYDRUNK]

Originally posted by Kman
I told you it was because of the force of the rear end needing to be broken in. Go talk to ANY high performance manufacture of motors and they will say Wide Open Throttle.

I did this with the RXP. Kinda translated this web site (http://www.mototuneusa.com/break_in_secrets.htm) to water. First time it saw water I went WOT after I got past the 300 ft buoy. GF was on the back, and was pissed. Floored it for 5 seconds then drove varying speeds for 5 minutes. Repeated process 4 times, before returning to the regular Seadoo break-in. GF hasn't been on the thing since because she says I'm an asshole. :devil: Thing runs great except for last year's supercharger clutch issue you may remember me bitching about.