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which turbo?

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Old 09-26-2009, 10:26 PM
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Hey guys, building a turbo 402 and looking at two different turbos,
an S88 or GT4788. Anybody got any input as to which one is better/ more preferred?
Old 09-26-2009, 11:32 PM
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pt88 or pt91 for that sized engine
Old 09-27-2009, 08:44 PM
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I thought against the pt88 because of the t4 flange being restrictive. Is the pt91 also a t4? Or can you order either with a t6 flange?
Old 09-27-2009, 10:36 PM
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A PT88 will spool slower than a GT4788 and make less power, and less than an S88 also. PT91 isnt a bad turbo, but he doesnt need a thumper to make his power goals on a 402.
Old 09-28-2009, 03:47 PM
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How much of a price difference is there between the gt and the s88? Reliability wise either one? ScorpoinT thanks for the help so far. Just trying to find out which one to order and who through. What about BOV and WG?
Old 09-28-2009, 04:22 PM
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i talked to dr turbo and he said a pt88 for my goals. im pretty sure he said it was a t6
Old 09-28-2009, 05:20 PM
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Originally Posted by bad6as
i talked to dr turbo and he said a pt88 for my goals. im pretty sure he said it was a t6

I thought that all pt88's were .96 A/R t4's. Mine is.
Old 09-28-2009, 05:30 PM
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thats what I have heard. t4 flange is restrictive. the other two turbos are t6 flanges. Just wondering about price between the two and longevity. Still wondering what bov and wg to run though...
Old 09-29-2009, 03:50 PM
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maybe he said gt88 the a/r is a 1.08
Old 09-29-2009, 09:21 PM
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I would think the 91 would be ideal for what your doing
Old 09-29-2009, 09:39 PM
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PT88 is T4 and GT88 is T6. No relation in power though....as the GT88 will make ALOT more power. Spool up is almost identical if not better with the GT.
Old 09-30-2009, 11:26 AM
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how does the gt88 and the s88 compare?
Old 09-30-2009, 11:27 AM
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Originally Posted by ssnovaturbo
how does the gt88 and the s88 compare?
GT88 is more compact. As for HP its a toss up.
Old 09-30-2009, 11:39 AM
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What about price and reliability? DR. Turbo, Do you carry both? What would you put on it?
Old 09-30-2009, 11:47 AM
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Originally Posted by ssnovaturbo
What about price and reliability? DR. Turbo, Do you carry both? What would you put on it?
Both are great and will take serious beating. We carry everything pretty much....if its a Garrett, BW, Tnetics, PTE, Holset, IHI.....etc



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