APS making too much boost?

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03-30-2008, 09:19 PM

#21

Sideways240sx

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Quote:

Originally Posted by MY99TAWS6

Sideways I have heard of guys upgrading the blow offs already but not the gates. Not sure what other gate would fit on that setup? But we do have a few stock engine guys running think 7psi range..Huggerz??

Your right... I was also thinking of a 350z kit that had interally gated turbos' and people were changing them and adding an external gate.

Chris

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03-30-2008, 09:32 PM

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peter@aps

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Originally Posted by MY99TAWS6

Also have to wonder if maybe APS has got stuck maybe unknowingly with knock off tial gates. They are out there now unfortunately. Tial also has ways to check on their website to see if they are in fact real tials or knock offs. Wouldn't of course expect the knock offs to work properly.

APS uses genuine Tial Wastegates..............purchased directly from Tial in the US.

Peter

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03-30-2008, 09:33 PM

#23

MY99TAWS6

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Ok was pretty sure no problem in that area Peter. So do you have any ideas for these guys that seem to be getting more than 7 psi from their kits? I would think one 38 per turbo is plenty big enough.

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03-30-2008, 10:03 PM

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peter@aps

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Originally Posted by Alvin

Yikes! We definately don't want 10psi on a stock short block.. We where lookign for around 5psi and upping it to 7psi at the track.

The base wastegate springs are 7.5 - 8 PSI so there's no way you could run 5 PSI.

Peter

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03-30-2008, 10:12 PM

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peter@aps

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Quote:

Originally Posted by MY99TAWS6

Ok was pretty sure no problem in that area Peter. So do you have any ideas for these guys that seem to be getting more than 7 psi from their kits? I would think one 38 per turbo is plenty big enough.

I'd guess that the wastegates are very marginal on gas flow or the orifice in the turbine housing is marginal. If you have a very retarded ignition timing stratgey this could also accentuate the issue.

Peter

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