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gt3037s vs gt3071r whats the diference between these two turbos? which 1 is the better snail?

They are both good turbos, there is no better out of the two - there might be one which is more suited to what you want but nothing in your question suggests what that would be.

A GT3037S (GT3076R in Garrett speak) is very very similar to a GT3071R, everything on the turbine side is identical - the 76R just has a bigger compressor wheel and compressor housing (which also has antisurge ports). The GT3076R will make an extra maybe 50 or so hp but with that comes a little more lag.

A "GT3037S" is a HKS handle meaning GT30 turbine + 76.2mm 56T GT37 compressor in a port shrouded 0.60 A/R T04E compressor housing - "S" . From HKS the compressor trim can be 52 or 56 .

The GT3076R from Garrett is basically same thing from Garrett but only in 56 comp trim and minus the flared inlet stub .

A "GT3071R" is same deal as the GT3076R but with a 71.1mm 56T GT35 compressor wheel , in a non shrouded 0.50 A/R compressor housing .

A .

http://www.turbobygarrett.com/turbobygarre...R_700382_12.htm

http://www.turbobygarrett.com/turbobygarre...T30/GT3071R.htm

Edited by discopotato03

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