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Forced Induction Turbo, Supercharger, Methanol, Nitrous |
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07-15-2014, 01:31 AM | #29 |
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9.5
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07-15-2014, 02:11 AM | #30 |
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For what it's worth, I'm personally a huge fan of the gtx28 series as well.
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07-15-2014, 02:39 AM | #31 |
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nice saying
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07-15-2014, 11:29 AM | #32 | |
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Yea you'll see a lot of PSI the lower the comp for pump gas. Technically you could run more than that if you wanted, but you'd be going past 400whp. Since the GTX28 is a relatively small turbo, I wanna say boost will be there at 2900-3000 rpm. Most people think that low comp will be bad response, but the response is offset from the amount of boost pushed. To make it better I would reccomend a twin scroll manny if they have one for the 28
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Last edited by cdrazic93; 07-15-2014 at 11:58 AM. |
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07-15-2014, 11:31 AM | #33 |
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I mean that's crazy low! I've been running 20psi so far! Although I can't really tell but it might be on a conservative tune. I'd be very happy with 15psi.
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07-15-2014, 01:45 PM | #34 | |
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07-15-2014, 01:51 PM | #35 | |
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07-15-2014, 01:52 PM | #36 | |
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07-15-2014, 01:53 PM | #37 | |
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07-15-2014, 01:55 PM | #38 |
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So 12.5:1 CR with 21 psi on 93 pump gas only made 412 whp...yeah you'll need more than 15 psi
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07-15-2014, 02:00 PM | #39 |
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Could be a conservative tune. I've seen people with about the same psi making over 500whp.
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07-15-2014, 02:00 PM | #40 | |
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How much did you sell yours for again?
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07-15-2014, 02:05 PM | #41 |
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$32.5k. My M3 is sold, and it is time to build another turbo 4 cylinder.
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07-15-2014, 02:06 PM | #42 | |
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There are so many different approaches to tuning and engine building.. everything is a compromise.
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