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Not making full boost!

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Old Jul 10, 2005 | 01:27 PM
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Question Not making full boost!

I bought an 8lb Procharger system from EPP but is only making 6lb of boost???

I installed the Procharger a few weeks ago and finally got it dyno-tuned. The max hp I got was just a little over 400. This isn't too hot considering previous dyno before the procharger was 315. Less than 100 hp gain.

Has anyone else had a similar problem with not making the intended boost? Is there any way to correct this with the existing components?
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Old Jul 10, 2005 | 02:05 PM
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Bob probably ordered the kit under the assumption that the car was 100% stock, but since you have headers and a cat-back, you've gotten rid of some that restriction, which results in less boost. (Not a bad thing.) All you have to do is put on a smaller pulley to get back up to 8psi.
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Old Jul 10, 2005 | 02:41 PM
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I agree the pulley will change the boost level. I was curious if there is anything else which can alter the boost.

When I ordered the system I talked in full detail with Bob about what was already on my car. I questioned him on each and every step involved and he had full knowledge of what is on my car. Now whether or not that was conveyed to ATI .......

Besides, I don't think the shorty headers make any less restriction than stock on the '01 and '02 cars.
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Old Jul 10, 2005 | 02:57 PM
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6 rib setup or 8 rib???? I never could get the advertised boost from what ATI said..... I bet its belt slip though..... what size pulleys and were are you shifting at?? I always got belt slip with the stock pulley setup..... until i swaped to SDCE spring tensioned 8 rib setup... the more belt wrap helped out so much.
Kyle
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Old Jul 10, 2005 | 03:06 PM
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Originally Posted by ntimid8r
Now whether or not that was conveyed to ATI .......
Exactly!
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