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C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

what rpm?

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Old Nov 10, 2004 | 10:58 PM
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At what rpm does your L98 shift when pedal is floored? I may have picked up a few hundred rpm from a camswap and just want to compare with others running a stock cam.
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Old Nov 10, 2004 | 11:37 PM
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I'm running a stock cam with 1.6:1 RRs and shift points are: 1-2=5,200rpm; 2-3=5,700rpm.
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Old Nov 10, 2004 | 11:44 PM
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If anyone can squeeze power out of an L98, its 65Z
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Old Nov 11, 2004 | 12:46 AM
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cuisinartvette, thanks but there are some others, like Vic'89, who have strong pulling L98s.

BTW Vett-eight-nine, where is your L98 shifting with the new cam?
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Old Nov 11, 2004 | 08:55 PM
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I'm ashamed, Z01, with a zz4, the digital tach shows 4900. Mind you, it's not 100% tuned yet. Im optimistic, but, mid 5s? I doubt it....
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Old Nov 11, 2004 | 09:10 PM
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It really should NOT be up to your cam to set the shift rpms..
It's up to your transmission to set that.

Mine shifts at 5K if I let it shift, but manually I shift at 5300rpm or so, and that's because my cam is still stock.

Before my mods and new tranny, the car shifted at 4400rpms by itself (when it didnt' slip), and was out of breath by 4800rpms..

With a ZZ4 and your cam you should be shifting in the mid to high 5k's.
(Unless you are using stock TPI (which is a waste with a ZZ4)).
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Old Nov 11, 2004 | 09:14 PM
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Beats me, I've never seen over 4900 and before the swap it was 4600
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Old Nov 11, 2004 | 09:52 PM
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With a nice cam you should be able to pull higher if intake & exhaust are not the blockage points.

Vett-eight-nine, what other mods do you have??
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Old Nov 11, 2004 | 09:56 PM
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That's it, really. Frisbee's gone (thanks to your website btw ).
You think I should be pulling higher?
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Old Nov 11, 2004 | 09:57 PM
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Vette-Eight-Nine, why don't you try to manually shift the car at higher rpms?
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Old Nov 11, 2004 | 10:27 PM
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I will, eventually, but right now, I'm not too confident with this "base" tune I've got by adjusting the injector constant only after the install.
I'm having a hell of a time getting my datalogging rig to work
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