Quote:
Originally Posted by Steve Tinker
Meir
Just to put your mind at rest, I fitted a set of Chinese sourced headers (from Delubois Parts) onto my 2001 S. No other mods mechanically. The fitting went well, bolted strait on to the heads & secondary cats with no drama's. There is definately no loss in mid range, and the balanced length header pipes really come into their own at 4,000 rpm. In fact, as far as I am concerned there are no downsides apart from not being able to fit the rear plastic undertray.
One difference for you though is that here in Australia we don't have cats in the header - this may or may not have an impact on US cars.
The headers worked so well that I bought the cat delete test pipes from Delubois, and bolted them onto my stock rear muffler. This combo gives a really good sound above 4,000 rpm without the dreaded drone.
|
thanks Steve.
couple of reasons for asking:
1. i have the test pipes installed, and right away noticed a drop in torque in the low RPM. no doubt that once the engine gets to 3k RPM and up, there is extra gain.
2.the plan is going totally catless. got headers waiting to be installed, and once i finish my "winter project", i'm gonna start with my home made PSE (got most of the needed parts in hand)
since i don't track my car, i rather have more torque in the low mid then the high RPM.
BTW. as part of my project, the car is going back to stock, and then to the dyno.
next:headers, test pips,open muffler, large TB and plenum,UDP, ECU flush and dyno again.
its about time someone will show the real numbers. it might as well be me.
boxster S
Threaded Mode
