ZL1camaro

what alows the new ls-1 from the gto to make more power. the only thing i know of is that it now has true dual exaust, instead of y pipe. is there now more compression or any other changes in the motor

badpewter-z

iTrader: (4)

they dont have to under rate them any more
same reason the vette was always rated higher with the same friggin motor

dissonance

Different cams and pcm tune... this is why there is so many gains from swapping a cam… gm left a lot on the table when they picked the cam for the f-body vs. vet… why would you spend 20k more and have a Camaro beat you?

badpewter-z

iTrader: (4)

the fbody and vette (non zo6) ran the exact same motor and cam as for the tune minimal differences. a stock fbody will actully put more power down on a dyno than a stock vette too. they have a lil more loss but are lighter cars

dissonance

i know for sure the ls6 has a diffrent cam, but i'm almost 100% sure the vet has a diffrent cam... the ls1 that went in to the vet does not have an egr and that has something to do with the spec of the cam... same thing with the 01 02 f-body...

i know the 98 to 00 f-body has a diffrent cam then the 01/02 f-body

Vet also has dual exhaust/mufflers and different manifolds

badpewter-z

iTrader: (4)

yes 98-00 have one cam 01-02 have the same cam as the trucks as with the ls1 vette trust me i get bored at work and looked it all up. parts and numbers is my job

dissonance

F-Body
Intake lift .500
Intake duration 201
Intake lobe center 117
Exhaust lift .500
Exhaust duration 212
Exhaust lobe center 122
Lobe separation 114.5

Y-Body
Intake lift .472
Intake duration 202
Intake lobe center 113
Exhaust lift .479
Exhaust duration 210
Exhaust lobe center 121
Lobe separation 117

huh? diffrent part numbers to?
12560965 Camshaft for 98-00 F-body
12560964 Camshaft for 98-99 Y-body
12560968 Camshaft for 00 Y-body
12561721 Camshaft for 01 F-body & LS1 Y-body "one year is the same"
12560950 Camshaft for 01 Y-body LS6

the intake are also diffrent... no egr on the Y-body
12561269 Intake manifold for 98-00 F-body
12557846 Intake manifold for 98-00 Y-body

badpewter-z

iTrader: (4)

i stand corrected must have been thinking of the 01's and confused myself

dissonance

I have heard that some 98 f-body’s got y-body cams but I’m sure how you could ever tell? Funny thing is the y-body cam is smaller interims of lift and duration "minus the intake" but the lsa is 117 on the y-body and the f-body is 114.5 I’m sure they this changes the power band on the y-body...

I don’t now much about cam so maybe someone can chime in and fill us in?

GTO has different manifolds... dual exhaust... and a different cam. This gives it a higher rating... I have only looked at a few dyno runs from GTO's and Auto Trans running around 310-320 to wheels "remember this is with almost no miles so that number should rise. Maybe the HP rating is at the flywheel? That would work out close to 320 to the wheels?