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Any big difference?

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Old Dec 8, 2011 | 07:44 PM
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Default Any big difference?

Threw a rod in my 98 Z about a month ago, now she has an LS1 from a 00 Z. Are their any major differences between the 98 and 00 LS1? I know that 01-02's have the LS6 intake and no EGR... but is their anything different between these two?
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Old Dec 8, 2011 | 07:49 PM
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Yep, the heads, cam, intake are all different.
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Old Dec 8, 2011 | 07:51 PM
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Originally Posted by IRONFIST
Yep, the heads, cam, intake are all different.
Different isn't always better hah... But, I'm assuming they are all better and it should make a bit more power than the 98 LS1??
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Old Dec 8, 2011 | 07:56 PM
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https://ls1tech.com/forums/15544832-post5.html
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Old Dec 8, 2011 | 07:58 PM
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Originally Posted by TransAmWS.6
Exactly what I needed... thanks!
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Old Dec 8, 2011 | 08:37 PM
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Originally Posted by TransAmWS.6

good write up
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Old Dec 8, 2011 | 09:56 PM
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Originally Posted by IRONFIST
Yep, the heads, cam, intake are all different.
Yes, no and no. Heads have a different valve cover arrangement (perimeter bolt vs center bolt - and thus a different casting number), but the cam and intake are exactly the same between '98 and '00.
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Old Dec 8, 2011 | 10:16 PM
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Originally Posted by RPM WS6
Yes, no and no. Heads have a different valve cover arrangement (perimeter bolt vs center bolt - and thus a different casting number), but the cam and intake are exactly the same between '98 and '00.
Yea it says different heads... I thought it might of meant Better heads, as in better flowing... not something like that hah. It also says the cam is different in the write up? I already knew the intake was the same before I posted this.
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Old Dec 8, 2011 | 11:52 PM
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Originally Posted by need2speed94
Yea it says different heads... I thought it might of meant Better heads, as in better flowing... not something like that hah.
The only heads that are marginally better in stock form are the 241 heads found on all '01-'02 cars (and some very late '00 cars). The difference with 241s is a better casting process which may result in slightly better flow.

As for the 806 heads from '98, vs. the 853 heads from '99-'00, there is no difference besides the valve covers and coil pack hardware arrangement....no internal advantages between those two.

Originally Posted by need2speed94
It also says the cam is different in the write up?
I think you might have read it wrong, or there is an incorrect passage somewhere. The only part that mentions the cam for '98 is this:

14. 1998-2000 cars had a larger cam than the 01-02 cars
....and that is correct. '98-'00 cam had a slightly more aggressive duration and lift than the later cams.
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Old Dec 9, 2011 | 12:06 AM
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Originally Posted by RPM WS6
The only heads that are marginally better in stock form are the 241 heads found on all '01-'02 cars (and some very late '00 cars). The difference with 241s is a better casting process which may result in slightly better flow.

As for the 806 heads from '98, vs. the 853 heads from '99-'00, there is no difference besides the valve covers and coil pack hardware arrangement....no internal advantages between those two.



I think you might have read it wrong, or there is an incorrect passage somewhere. The only part that mentions the cam for '98 is this:



....and that is correct. '98-'00 cam had a slightly more aggressive duration and lift than the later cams.

Ahh yes... I did. Either way... I've concluded that I should get a bit more hp/tq from the better flowing exhaust manifolds. And correct me if I'm wrong, but would the larger TB cam hurt my throttle response a bit when I floor it and go WOT?
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Old Dec 9, 2011 | 12:15 AM
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Originally Posted by need2speed94
Ahh yes... I did. Either way... I've concluded that I should get a bit more hp/tq from the better flowing exhaust manifolds.
Yes, the '00+ exhaust manifolds are superior in flow to the '98-'99 style.

Originally Posted by need2speed94
And correct me if I'm wrong, but would the larger TB cam hurt my throttle response a bit when I floor it and go WOT?
At WOT, there is no difference in performance because the throttle blade is fully open with either cam.

All the larger TB cam does is require more pedal input for the same amount of throttle blade response as with the smaller TB cam. So the end result is that a bit more pedal travel is needed for equal throttle blade position.
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Old Dec 9, 2011 | 12:23 AM
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Originally Posted by RPM WS6
Yes, the '00+ exhaust manifolds are superior in flow to the '98-'99 style.



At WOT, there is no difference in performance because the throttle blade is fully open with either cam.

All the larger TB cam does is require more pedal input for the same amount of throttle blade response as with the smaller TB cam. So the end result is that a bit more pedal travel is needed for equal throttle blade position.
Gotcha, thanks!
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