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Old 10-17-2018, 02:43 PM   #21
jrpontiac
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Join Date: Nov 2017
Location: spokane, wa
Posts: 122
Re: 77 c10 5.3ls turbo

Google was my friend. But I will say it was really confusing because there is no correct answer. But I did determined a couple things many people agreed on. I determined the LSA for a turbo should be in the 112-114 range. As much as I wanted a 108lsa for a nasty idle apparently that is not what turbos like. The lift I picked .560 appeared to be about as high as I could go using stock pushrods and valve spring retainers, I am changing springs. I'm sure someone has a different opinion on that.
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1977 Chevy C10 SB, Turbo 5.3ls, TH400
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