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Originally Posted by 207 de
Am I at the point where I need a FMIC or bigger turbo? Im running about 1.4ish bar..Apparently more boost just gets me hot air and no gains. "if" i went a bigger turbo, whats the biggest you would go and have it still streetable? Im thinking a 3037 or a TD06-25G? (is a 25G heaps bigger than a 20G) I'd need cams to get them working half decent hey?
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Pete you'd probably find a TD06-25G a bit of a pig to drive off boost with a 2L. A 20G on a 2.5 isn't too bad, it's responsive from about 3500rpm and hits hard. Cams will help your top end with a 25G, but you could be ok with a 20G on stock cams - I'm just going off what I know from my car, but then again, we have different motors so I'm probably wrong.
I don't know enough to comment on a 3037, but have a look at what Huy's old sti was doing with a 2835 (iirc?) - Not sure how this sizes up to your current turbo but it would be a good comparison to make. With a 3037, you'll be pushing the upper end of 300HP if not beyond it.
I'll leave it to the pros to comment, but there's some food for thought.