i wanted to know what is the performace differance for the 95-99 cavalier z24 and the 00-02 z24 I am looking to but a second z (aside my 2000z )I know they have little look difference
im pretty sure they have the same engine man..i personally like the 00+ tranny better but as far as performance i dont think your gonna find much differnce..unless im just missing something
"Freedom 'ought to have its limits"-George W. Bush may 31 1999 (who voted for this idiot?)
Actually, they are different:
Some 99 engines as well as 00-02 have a compression ratio of 9.7:1 versus the older engines with 9.5:1.
When www.gmpowertrain.com used to have the LD9 specs on their website, there was speculation over the numbers they posted. The Pre 99 LD9 had specs that stated 150 fl/lbs of torque whereas the 99+ engines were listed with 155 ft/lbs of torque.
None of these power specs were ever confirmed though. Nobody ever dynoed a brand spankin new version of either engine aside from what GM posted.
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There is the difference in compression ratios (however small they may be) due to the change to flat-top pistons in '99+, but the older ones had a better flowing exhaust manifold ('96-98). These changes are so small they likely cancel each other out anyways, so don't make your decision based on that. The older the car and more miles on it the slower it's likley gonna be, that's a better decision making factor than anything else.
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Ian Brydon wrote:There is the difference in compression ratios (however small they may be) due to the change to flat-top pistons in '99+, but the older ones had a better flowing exhaust manifold ('96-98). These changes are so small they likely cancel each other out anyways, so don't make your decision based on that. The older the car and more miles on it the slower it's likley gonna be, that's a better decision making factor than anything else.
Actually they change exhaust for the better when they changed in mid 99, or 2000. A bigger down pipe as well. I had a 97 Z24 (from new), and now have a 2001 Z24 (from new as well.) the 200+ plus's are much faster. My 97 Z with mods could not touch my 2001Z stock. As said no one has dynoed any stock to see HP differences, but there was more power put out. most of your fast times in the Z's (N/A) are 2000+ cars, or cars with 2000+ motors.
^^then there was something seriously wrong with ur '97.... my '96 Z24 was a fender behind my old friend who had an 02 Z24 5spd.. and mines auto... and at the time i only had my intake he had intake and cat-back...
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captaincarnage wrote:^^then there was something seriously wrong with ur '97.... my '96 Z24 was a fender behind my old friend who had an 02 Z24 5spd.. and mines auto... and at the time i only had my intake he had intake and cat-back...
Well my 97 Z ran a best 15.4 With homemade intake 57mm TB, 2.25" exhaust (stock manifold), motor mounts. For teh year it was a fast car, but 2000+ are just beasts!!
well my quad burns em both
i dont really see how you can say a 2000 + 2.4 can blow a pre 2k away? theres just not enough differnce .....
"Freedom 'ought to have its limits"-George W. Bush may 31 1999 (who voted for this idiot?)
John Higgins wrote:Ian Brydon wrote:There is the difference in compression ratios (however small they may be) due to the change to flat-top pistons in '99+, but the older ones had a better flowing exhaust manifold ('96-98). These changes are so small they likely cancel each other out anyways, so don't make your decision based on that. The older the car and more miles on it the slower it's likley gonna be, that's a better decision making factor than anything else.
Actually they change exhaust for the better when they changed in mid 99, or 2000. A bigger down pipe as well. I had a 97 Z24 (from new), and now have a 2001 Z24 (from new as well.) the 200+ plus's are much faster. My 97 Z with mods could not touch my 2001Z stock. As said no one has dynoed any stock to see HP differences, but there was more power put out. most of your fast times in the Z's (N/A) are 2000+ cars, or cars with 2000+ motors.
The '96-'98 exhaust manifolds have bigger runners than the '99+, not sure about the downpipe though. Without dyno proof we'll never know.
15.3 @ 89.97mph, 14's on the way?
For Sale:
Getrag '00-'02 2.4 8000kms $800
omg..this is gonna turn into the age old 2.2 vs 2.4 argument isnt it!!!!?
"Freedom 'ought to have its limits"-George W. Bush may 31 1999 (who voted for this idiot?)
ive got a 97 2.4 auto sedan , and a 00 2.4 sedan , with all the same mods , both run equal times , with in hundredths of each other
and i forgot to mention , you will have factory freaks out there
and well as the factory turttles
I thought, please correct me if I am wrong, but didn't the 99+ have a better flowing intake manifold? Better flowing Ports? Also wounded the difference in high and low impedance injectors affect power a little. Does the different knock sensors affect power any?, I don't think so imo.
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Old Motor: 160whp & 152ft/lbs, 1/4 Mile 15.4 @88.2
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some 99 had the same injectors the 200+ had from what i understand 99 had a slightly bigger diameter downpipe opening than 96-98. I think the tranny made a difference with the times 96-99 and 2000+ ran the getrag was geared differenty also as far as i know auto remained the same so track times would be similar.
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all the time
no EGR 2000+
slightly higher compression
but like most have said, the biggest difference is the gearing on the getrag
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[quote=Keeper of the Light™]no EGR 2000+
slightly higher compression
but like most have said, the biggest difference is the gearing on the getrag
Correct. The compression increase might have been small, but it all adds.
Like i have said most of your great times in 2.4's n/a are by 2000+ motors. All your nice turbo times with a factory motor were 2000+ motors. So it would seem that they have more to them. Maybe not a lot, but enough.
