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

Steering Rack ID; Z51 or not?

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Old 10-12-2018, 01:21 PM
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Tom400CFI
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Default Steering Rack ID; Z51 or not?

This should be really basic, but I confused;

Base rack = 2.5 turns, lock to lock.
Z51 rack = 2 turns.....this is what I've always understood.

With my '89 'Vette Kart project, once on the road I quickly noticed that the steering was much sharper than my '92 (base). I assumed it was due to less weight. But it seemed even sharper than that. When I had it up on stands, I spun the steering wheel and it turned not 2 turns, lock to lock....but not 2.5, either. I got 2.25 turns out of it -right in the middle. Thoughts?
Old 10-12-2018, 02:09 PM
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JimLentz
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Does this thread help?
Old 10-12-2018, 02:11 PM
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383vett
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2 turns or just a little over is a Z51.
Old 10-12-2018, 09:20 PM
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WVZR-1
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I've read more than 'once' that in 89 there were some cars built with 13:1 steering (1.96) turns and midyear everything got a different ratio and they were actually considered 2 3/8 turns(myth I believe).There's threads I believe that mention that. What is the 'end-plug' letter code? Is there a B1X option on the SPID - it's been said no one has ever seen one with the B1X on the SPID I've no idea.


This is the only thread I stumbled upon this evening with a quick search.

https://www.corvetteforum.com/forums...post1557560079

MVMA specifications vary year to year but an '88 is mentioned to be 13:1 (1.96) 15.64:1 (2.36)

Last edited by WVZR-1; 10-13-2018 at 08:46 AM.

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