Quote:
Originally Posted by Kremer930
There is not an awful lot of difference between the 20G and a 3071. The 71 has a 3mm bigger compressor wheel. My gut feeling is that with a 2.1 litre that you would get better response by going for a TD05-20G or a GT2871.
Cobb has had great results on a TD05-20G on the 257. Especially once you run e85 and higher pressure ratios.
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The other thing to consider is ballbearing on the garrett and journal on the mitso. This makes a difference.
I had a blouch billet wheel td05. And replaced it with a larger blouch billet wheel dom 2.5 and it spoooled earlier and made more top end at lower boost. Id expect a similar result comparing a 20g to a 3071.
The OP sounds like he wants a pretty powerful setup. What about 3076 even. He want 370whp .
EDIT. Forget the bb vs jb comment. Just realised OP said 20g XTR not XT.