bolt on power

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May 6, 2003 | 08:24 PM

#26

BDoty311

88 AE

Joined: Mar 2002

Posts: 2,865

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From: N/A

I understand what you are talking about Icemark, Im saying that you need to reduce backpressure from stock levels to increase power.

May 7, 2003 | 04:17 AM

#27

SlidinRX7

The Only SlidinRX7

Joined: Jul 2002

Posts: 105

Likes: 0

From: Hawaii

Quote:

Originally posted by Icemark
actually there is a fine line, too free of an exhaust and you loose low end torque, but gain high end HP.

But with a less free flowing design , you might gain both low end and high end power.

For example often putting on a 60mm exhaust designed for a turbo on to a N/A will really mess up the low end and overall HP. But using a 50mm or 55mm will give great gains, with a nice increase on the high end of the rev band.

Yup, it all depends on what the power is going to be applied to. If for SCCA, you would want more low end and than top end (depending on the course). On the other hand, if you are doing high speed runs (freeway/highway racing), then you would want something free flowing. A well designed exhaust system would have a good balance between back pressure and vacuum(sp?)