Single Turbo RX-7's Questions about all aspects of single turbo setups.

twin garret gt-28rs???

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Old Jul 27, 2007 | 07:04 PM
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twin garret gt-28rs???

anyone running twin gt28rs set-up (this might not qualify in the single turbo section but whatever),

i am looking for 390-420 hp i will be using 650cc primary and 1200cc secondary injectors is this enough for these turbos
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Old Jul 28, 2007 | 05:01 PM
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why twins?
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Old Jul 28, 2007 | 09:30 PM
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twins are less eff. for a given flow rate, heavier, more complicated and you have 2x the potential weak links... twins, given the proven single turbo performance available , makes absolutely no sense.
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Old Jul 28, 2007 | 10:32 PM
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Unless they are run sequentially.
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Old Jul 28, 2007 | 11:36 PM
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Originally Posted by doridori-rx7
twins are less eff. for a given flow rate, heavier, more complicated and you have 2x the potential weak links... twins, given the proven single turbo performance available , makes absolutely no sense.
Wow, what logic...


-Ted
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Old Jul 28, 2007 | 11:58 PM
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Originally Posted by RETed
Wow, what logic...


-Ted
totally
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Old Jul 29, 2007 | 03:25 PM
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m2 performance use to machine the stock turbo housings to swap out the ht-12 for gt28r dual bb turbos two of these turbos can flow about 65 lbs.min
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Old Jul 29, 2007 | 03:33 PM
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Well if you do it it would work, how do you plumb something like that though?
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Old Jul 29, 2007 | 03:57 PM
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Originally Posted by Bluem
m2 performance use to machine the stock turbo housings to swap out the ht-12 for gt28r dual bb turbos two of these turbos can flow about 65 lbs.min
the m2s were t25s.

The BNR stage 3s are similar to what you're looking for, but of course they use a shared turbine housing and arent ball bearing.
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Old Jul 29, 2007 | 04:17 PM
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hey rich are you still running the bnr's?

wonder if gt28r's will fit in the stock housings
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Old Jul 29, 2007 | 07:01 PM
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Didn't RX7 Store used to have a kit? I'm going twin with Garrett T3/TO4E's.
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Old Jul 29, 2007 | 10:03 PM
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Originally Posted by Bluem
hey rich are you still running the bnr's?
Nope. I had the thirst for more boost than they could provide. Besides, I was running them non-sequential and missed the low end. Sequential BNRs are the hot ticket if you want an affordable twin setup, in my opinion.

Call up Bryan and see what he can do for you, www.BNRturbos.com.
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Old Jul 30, 2007 | 12:07 AM
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I like the idea of two turbos, I'm building a twin gt30 setup with two bovs on a custom s.s. steel manifold currently. Should make around 550hp.
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