delete this thread please.

fantasy_blu_boi · Post by **fantasy_blu_boi** » Mon Sep 07, 2009 10:59 pm

delete this thread please, i am no longer using it.

Post by **Spunkster** » Tue Sep 08, 2009 11:14 am

What did Skunk2 say about this?

fantasy_blu_boi · Post by **fantasy_blu_boi** » Tue Sep 08, 2009 9:58 pm

Spunkster wrote:What did Skunk2 say about this?

I didnt ask them yet, but i just put back my mugen catback exhaust and the problem is solved. The mugen catback is 50mm up front, then goes to 57mm near back of B pipe, and then 60mm from axelback on. It turns out that the 70mm skunk2 catback exhaust was just too big of piping for the k20z3. It was only good on high end 5000rpm+ racing and driving, but anything from 3000rpm and under deals with a great loss of power. I guess the exhaust pulses get really messed up on the low end with too big piping as an exhaust, as this is a naturally aspirated setup.

I guess to all k20 owners, DO NOT GO ANY BIGGER THAN 2.5 INCHES FOR AN EXHAUST. It will lose a lot of power on the low end for a slight betterment of high end.

soxfan143 · Post by **soxfan143** » Wed Sep 16, 2009 7:42 pm

fantasy_blu_boi wrote:
Spunkster wrote:What did Skunk2 say about this?
I didnt ask them yet, but i just put back my mugen catback exhaust and the problem is solved. The mugen catback is 50mm up front, then goes to 57mm near back of B pipe, and then 60mm from axelback on. It turns out that the 70mm skunk2 catback exhaust was just too big of piping for the k20z3. It was only good on high end 5000rpm+ racing and driving, but anything from 3000rpm and under deals with a great loss of power. I guess the exhaust pulses get really messed up on the low end with too big piping as an exhaust, as this is a naturally aspirated setup.

I guess to all k20 owners, DO NOT GO ANY BIGGER THAN 2.5 INCHES FOR AN EXHAUST. It will lose a lot of power on the low end for a slight betterment of high end.

This is absolutely not true. It sounds like the tuning was not done correctly. Larger profile cams like stage 2 cams will always benefit from a larger exhaust. Especially a motor the breathes as well as the K series motor.

Garrett_si · Post by **Garrett_si** » Thu Sep 17, 2009 9:40 am

fantasy_blu_boi wrote:
Spunkster wrote:What did Skunk2 say about this?
I didnt ask them yet, but i just put back my mugen catback exhaust and the problem is solved. The mugen catback is 50mm up front, then goes to 57mm near back of B pipe, and then 60mm from axelback on. It turns out that the 70mm skunk2 catback exhaust was just too big of piping for the k20z3. It was only good on high end 5000rpm+ racing and driving, but anything from 3000rpm and under deals with a great loss of power. I guess the exhaust pulses get really messed up on the low end with too big piping as an exhaust, as this is a naturally aspirated setup.

I guess to all k20 owners, DO NOT GO ANY BIGGER THAN 2.5 INCHES FOR AN EXHAUST. It will lose a lot of power on the low end for a slight betterment of high end.

that's wrong

I could show you about 10 dyno test I done on different car, and open header dyno test never show us that with a big exhaust you lose power in the low end