Toyspeed.org.nz Message Board

by **dvmv_kim** » Wed Nov 14, 2007 10:11 pm

would anyone know what would be the max psi i could take with my gt4 it has a 3" aftermarket downpipe off the turbo and a podfilter with bov and i will be putting a front mount.

by **Boosted_162** » Wed Nov 14, 2007 10:21 pm

Stock ceramic CT26 - no more than about 14psi. Makes no more power with more boost. I ran mine on 17psi, went nuts but not really that good for the motor or turbo.

by **Prymal** » Wed Nov 14, 2007 10:36 pm

boosted gets a gold star ..

Plus you save your engine from ceramic intergestion ...

by **dvmv_kim** » Wed Nov 14, 2007 10:49 pm

would it be all good if i run 15psi max? and with the ct20b turbo could that run more and is that straight bolt on to the stock manifold that i got on my st185 and what else can i do to make the car more faster/powerful?

by **Boosted_162** » Wed Nov 14, 2007 10:59 pm

dvmv_kim wrote:would it be all good if i run 15psi max? and with the ct20b turbo could that run more and is that straight bolt on to the stock manifold that i got on my st185 and what else can i do to make the car more faster/powerful?

CT20B bolts on, but needs minor oil feed mods as far as im aware. Get a steel shaft one, and its been proven to work well up to 20psi (on Al's SW20)

15psi should be fine if your turbo and motor is in good condition. Id prolly lower it a bit on hot days tho, thats when your intake temp will go up and will start detonating. NOT GOOD.

by **Anth_555** » Thu Nov 15, 2007 7:18 am

Boosted_162 wrote:

CT20B bolts on, but needs minor oil feed mods as far as im aware.

no it bolts up no mods what so ever needed had one on my st185

no grip · by **Akane** » Thu Nov 15, 2007 1:57 pm

Don't really suggest you running 20psi of VTAX on the CT20b, you might overspeed it and the bearings wear out quicker.

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st185 gt4 max psi

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