Mac Daady before anyone chews you out on this, I suggest a search. Jersey in the house !

 

Thanks, but I searched several different ways so maybe it's me but I read a lot of specs on 01 & 02 LS1s and guesses and part numbers for the '04 but I didn't see an actual set of specs - Intake and exhaust duration @50, lift, LSA and CL.

I'm guessing by the way it runs that the specs are different from the 01, 02 fbodies.

 

It is (E/I) .479/.467 lift; 207/196 duration; 116 LSA; 117/115 timing

(Something I read in a Dec 03 Magazine---they never lie)

 

It is .479/.467 lift; 207/196 duration; 116 LSA; 117/115 timing

(Something I read in a Dec 03 Magazine---they never lie)

Can I assume that those are Ex/Intake as opposed to Int/Exhaust?

(And thanks, by the way)

 

I believe nobody really knows for sure. Its only speculation as nobody has put it on a cam doctor yet. So its either the '02 F-Body, '04 Corvette, or something different.

I plan on getting mine checked to know for sure. Just have to meet up with the guy that has one. Hopefully soon.

 

From what we have read the GTO cam is hotter then the standard vette but less agressive then the 385 hp Z06.

 

Can I assume that those are Ex/Intake as opposed to Int/Exhaust?

(And thanks, by the way)

You are absolutely correct! I know this because I kept the #s and compared it to an LS1 book...it is the same cam as the 2002 LS1 in the F and 2002/3 Y body. Its part # is 12561721. I forgot the magazine, but it had one of the first GTOs in it...Blue Goat.

 

From what we have read the GTO cam is hotter then the standard vette but less agressive then the 385 hp Z06.

E/I for LS6 is .551/555; Duration: 218/204; 117.5 LSA (2002/2003)
.525/.525; Duration: 211/204; 116 LSA (2001)

Seems like a big difference w/the LS1

 

It is (E/I) .479/.467 lift; 207/196 duration; 116 LSA; 117/115 timing

(Something I read in a Dec 03 Magazine---they never lie)

wow i thought it was closer to .500 on both sides... that seems really small!! :-off the

 

E/I for LS6 is .551/555; Duration: 218/204; 117.5 LSA (2002/2003)
.525/.525; Duration: 211/204; 116 LSA (2001)

Seems like a big difference w/the LS1

Something that might be relevant to this discussion is the emissions parameters GM has to meet with stock cams. Somebody pointed out that the Impala LT1 cam, at 192/196 and 111 LSA, has nearly identical overlap to the 95 f and y body cam, which is 201/208 at 117 LSA, about -28º at .050". It appears that GM was up against a hard limit in terms of overlap - maybe for emissions? Just for s&g I put the GTO cam into Desktop Dyno and came up with -30º overlap, which makes sense from an ever-tightening emissions standpoint.

The factory race cams have 110º and 106.5º LSA's with much bigger lobes, meaning the LS1 can use WAAAAY more overlap than the factory cams are permitted, including the LS6 cam (-24º overlap).

Just for comparison's sake, the Crane 144581 cam has 220/220 dur at 112 LSA, which works out to -4º duration at .050".

Even Lingenfelter's turbo cam at 208/230 121 LSA only has -23º overlap at .050", less than the factory cams (which means, I guess, that the factory cams, particularly the LS6, should work pretty well as turbo cams?)

Just something to consider when you guys are looking at cams.

 

Here's the info I posted on the other thread last week,

1998 - 2000 Fbody
202/210 int/exh @ 0.05" duration
0.496" / 0.496" int/exh lift
116 LSA

2001 - 2002 Fbody
197/207 int/exh @ 0.05" duration
0.467" / 0.479" int/exh lift
116 LSA

2001+ LS1 Corvette cam
198/208 int/exh @ 0.05" duration
0.500" / 0.500" int/exh lift
116 LSA

2001 LS6 cam
207/217 int/exh @ 0.05" duration
0.525" / 0.525" int/exh lift
116 LSA

2002+ LS6 cam
204/218 int/exh @ 0.05" duration
0.551" / 0.547" int/exh lift
117 LSA

 

Here's the info I posted on the other thread last week,

1998 - 2000 Fbody
202/210 int/exh @ 0.05" duration
0.496" / 0.496" int/exh lift
116 LSA

2001 - 2002 Fbody
197/207 int/exh @ 0.05" duration
0.467" / 0.479" int/exh lift
116 LSA

2001+ LS1 Corvette cam
198/208 int/exh @ 0.05" duration
0.500" / 0.500" int/exh lift
116 LSA

2001 LS6 cam
207/217 int/exh @ 0.05" duration
0.525" / 0.525" int/exh lift
116 LSA

2002+ LS6 cam
204/218 int/exh @ 0.05" duration
0.551" / 0.547" int/exh lift
117 LSA

*******

Back to square one. Does the 2004 GTO have the 2001+ Corvette LS1 camshaft or the 2001-2002 F-body camshaft or neither?

 

*******

Back to square one. Does the 2004 GTO have the 2001+ Corvette LS1 camshaft or the 2001-2002 F-body camshaft or neither?

It has both because they are the same...I have the 2001 Y and the 2002 F body cam as:

e/i .479/.467 207/196 116 p/n 12561721. I picked up the GTOs # from a Dec 03 magazine and matched them with a LS1 Lingenfelter book. Anyhow, that's what I got.

 

We may need somebody to measure theirs and post the #s to really know for sure.

 

No flame intended on my part. I recall this question from mid-2004.

 

Yeah, I think I also posted this info once before. I haven't seen one that was actually measured before. Have you? Maybe one of the GM parts weenies can give us the part #.

 

Doesn't matter. Stock not big enough. Get a new cam and be happy.

 

Doesn't matter. Stock not big enough. Get a new cam and be happy.

LOL. I think folks want to know what they are starting with.

 

LOL. I think folks want to know what they are starting with.

Exactly. From a torque perspective, unless it is purely due to the exhaust, and or tune, the GTO is stronger than the stock F bodies. Stock f-bodies were rated at 325 HP, the GTO at 350 - where's the extra power coming from? To know what the specs are on this cam gives you some idea of the characteristics you may want to duplicate in the new cam. The GTO also has a pronounced lope to it at times - again making me think this is not the same as the 02 f bodies.

 

the GTO is stronger than the stock F bodies. Stock f-bodies were rated at 325 HP, the GTO at 350 - where's the extra power coming from?

2001/2002 F bodies were under rated in power (advertised). Compare rwhp and rwtq and you'll see a slight drop due to the IRS of the GTO.

 

2001/2002 F bodies were under rated in power (advertised). Compare rwhp and rwtq and you'll see a slight drop due to the IRS of the GTO.

He is right... compare rwhp numbers of ANY stock (98 on) LS1 f-body and you will see they made right around the same as the GTO's and Vette's. There might be a handfull that only made the 325hp but most made 350+ out of the box.

 

He is right... compare rwhp numbers of ANY stock (98 on) LS1 f-body and you will see they made right around the same as the GTO's and Vette's. There might be a handfull that only made the 325hp but most made 350+ out of the box.

That could be true, but I would like to see the actual specs on the 04 GTO cam anyway.

 

That could be true, but I would like to see the actual specs on the 04 GTO cam anyway.

Oh, I agree I would like to see the specs too!

 

I'm suprised one of the GM parts guys has posted the # for the 2004 GTO LS1 replacement, that would help us out.

 

I'm suprised one of the GM parts guys has posted the # for the 2004 GTO LS1 replacement, that would help us out.

not necessarily...GM seems to like using different part numbers for the same part if it's for a different car...