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I am trying to find a compressor map for the stock Garrett 86/87 GN turbo. I have been searching for quite a while, and I can't find it.

1. Does anybody know the exact model and trim of the stock GN turbo?
2. Does anybody have a compressor map for it?
3. Does anybody have a compressor map that is close to the stock turbo, if the stock turbo map isn't available?

I tried the archives, but I didn't see anything. Any help would be greatly appreciated.

Mike
1986 GN
 

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never seen a stock map...call John Craig at Limit and he will be as likely as anyone to have some info.. Or Harry at PTE, both come from Garrett originally.
 

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Never seen one either. John Craig told a buddy of mine a few years ago that he didn't have a map for it. At least if he did have it, he wasn't handing it out to anyone.

A T'netics guy said their map for the TO4B S-3 is "close", for whatever that's worth.

Supposedly the compressor wheel was made from a 60-1 wheel, and is a TO4B "50" trim.

John
 
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