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Discussion Starter · #1 ·
Hello all, I am a first time poster, that has enjoyed all the great reading and info on here. I don't currently own a Turbo Buick, but was wondering what the stock turbo from an 87GN was capable of. I am planning on using 2 of these on my current project, and was hoping to get 500 hp out of them. One day I will own a GN, but for now two stock turbos is as close as I can get.
Thanks, Tom
 

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I made about 460HP on the stock turbo. This was with 25-27psi in 1st and 2nd gear, leveling off to 21psi in 3rd. Also had an .82 exhaust housing on the stock turbo.

This netted my 3800# car [email protected]

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Stock Block, Stock Cam, PTE-52, Champion Heads, V4, MSD50's, TH DP, JayJackson 62mm TB, 16position MaxEffort Chip. 3680# with Driver
12.0 @ 116.5mph w/20psi using 17.9* timing

mailto:[email protected][email protected]</A>
 

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Discussion Starter · #3 ·
I never realized a stock turbo would boost that high. I guess the larger exhaust helps. I have read that the stock turbo uses a Super 60 compressor wheel. Is the exhaust turbine a standard T3, or would you require a special exhaust housing. The reason I ask, is that I know the early Turbo Regals had .82AR housings, and I thought they might be useful for more exhaust flow.
Tom
 
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