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How can I get a smaller A/R on my turbo?

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Old 07-17-2012, 07:54 AM
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Default How can I get a smaller A/R on my turbo?

The turbo I have is a BW366. It has a .91A/R and the extended tip. I know many turbos have different sized A/R's

My question is what would I have to do to make that turbo a .70 A/R or something similar in size to get a quicker spool.

I know I could always get another turbo but this seems to be a cheaper option than getting the gtx3076r that I am dreaming of haha.

Sorry about the noobish question.
Old 07-17-2012, 08:00 AM
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Just buy a new exhaust housing (with a lower A/R) that's compatible with your current turbo
Old 07-17-2012, 08:02 AM
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Who knew it was that simple THANKS!
Old 07-17-2012, 08:26 AM
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Well, in your case you cant. Your .91 housing is T4, and the only one smaller is a .88 which will effectively do nothing but increase spool time. There is a company that makes .70 housings but they are T3 flanged, and you will need to get a different manifold.

Your best bet is to replace the turbo. I would use an S360 or S362 FMW, they both spool noticeably quicker than your S366.
Old 07-17-2012, 09:33 AM
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Just when I thought it was 1,2,3 simple I looked at the turbos for BW, anything with a smaller a/r than .88 I have to go t3 manfiold!

I may sound dumb for this but I couldn't replace the current exhaust housing with another companies "0.70AR T04S compressor housing t4" on the turbo?


http://www.atpturbo.com/mm5/merchant...egory_Code=GTH

Something like that ^
Old 07-17-2012, 09:53 AM
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I'll still swap you turbos, plus cash on my end
Old 07-17-2012, 09:55 AM
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What kind of turbo? What kind of mani? Condition of turbo?
Old 07-17-2012, 10:43 AM
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Garrett p trim. Ilp stage 2. Great working condition. No bent fins or anything
Old 07-17-2012, 03:14 PM
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Originally Posted by JDMBLINDIAN
Just when I thought it was 1,2,3 simple I looked at the turbos for BW, anything with a smaller a/r than .88 I have to go t3 manfiold! I may sound dumb for this but I couldn't replace the current exhaust housing with another companies "0.70AR T04S compressor housing t4" on the turbo?http://www.atpturbo.com/mm5/merchant...e=GTHSomething like that ^
That turbine housing is for a Garrett P trim turbine, and in several ways wont mate up to the BW turbo.


Originally Posted by DFWs2k
Garrett p trim. Ilp stage 2. Great working condition. No bent fins or anything
The 79mm turbine from the S366 will spool quicker than the P trim.
Old 07-17-2012, 03:27 PM
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Not according to our dynos


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