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Discussion Starter · #2 ·
> If I swap a 3.90 diff from a turbo ZX
> into my '79 n/a with the stock engine,
> will the acceleration improve any?
It will depend what diff ratio that you now have.
Is yours a 2 seater, 4 seater, auto, or 5 spd?
Also, what year, and model turbo car diff are you getting that has 3:90 ratio?
Joe
 

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> It will depend what diff ratio that you now
> have.
> Is yours a 2 seater, 4 seater, auto, or 5
> spd?
> Also, what year, and model turbo car diff
> are you getting that has 3:90 ratio?
> Joe
I heard the 81-83 turbo ZX's had the 3.54:1 rear end. If you want a 3.90:1, get it from an '81-'83 non-turbo.
 

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Discussion Starter · #4 ·
> I heard the 81-83 turbo ZX's had the 3.54:1
> rear end. If you want a 3.90:1, get it from
> an '81-'83 non-turbo.
Yes, that was my thinking too. We find the 2+2 zx's had the 3:90
Joe
 

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Discussion Starter · #7 ·
> It will depend what diff ratio that you now
> have.
> Is yours a 2 seater, 4 seater, auto, or 5
> spd?
> Also, what year, and model turbo car diff
> are you getting that has 3:90 ratio?
> Joe
I have the stock '79 diff, whatever that is, 2 seater, 5spd manual, I didn't exactly mean out of a turbo ZX, and 3.90 will do.
 
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