NeedmorePower Member 192 Member For: 18y 11m 17d Posted 07/10/08 07:59 AM Share Posted 07/10/08 07:59 AM these are the mods to my car nizpro vlave springs, injectors, 3.5 inch custom exhuast system cat guttered, intank fuel pump, plazmaman plenium and rapids cooler, tranny rebuilt.Nizpro tried very hard to get more power through the car, but they have blamed my exhuast system as its bottling it up. the car is at 14.5 psi from memory. they also said the inlet temps are to high I think they said 39deg so has any1 got a 3.5 inch system for sale (xforce).any suggestions on such a low power would be considered....And please lets nor bag the tuner. im curious as some1 else has had a similuir problem Link to comment Share on other sites More sharing options...
Worm A much better forum Silver Donating Members 3,808 Member For: 16y 3m 22d Gender: Male Location: Victoria Posted 07/10/08 08:25 PM Share Posted 07/10/08 08:25 PM Get a decent exhaust for starters... And a cat... $1500 will get you a 4 inch dump, 3.5 cat and exhaust on ebay XFORCE full stainless..Have you upgraded the actuator? Doesn't say it in your mods? This needs to be done. Go for 12psi... Will hold boost well up to 18-20psi... If you have the stock one, it wont hold boost.You can also port your wastegate and fit a larger flapper valve...Have you plugs been regapped and how old are they? What about your fuel filter... This can play a major part in low power.Check all these and you should be around 330-350 definitely with your setup... Link to comment Share on other sites More sharing options...
RAP1D Member Donating Members 3,739 Member For: 18y 5m 25d Gender: Male Location: Sydney NSW Posted 07/10/08 11:06 PM Share Posted 07/10/08 11:06 PM If time permitted, you could drop the exhaust and dyno it, that way you know if its the exhaust or not.From what you told me, the 3inch mufflers are holding it back... put straight through 3.5inchers in there to match the whole system.But, in saying that, there's plenty of cars with 3.5inch dump & cat, stock exhaust minus centre muffs pulling over 310 with my stock plenum IC kits.I'd still be looking at your mufflers though, if that's what the tuner is saying then start there. Link to comment Share on other sites More sharing options...
Dirty32 Legendary member!! Donating Members 1,739 Member For: 17y 9m 23d Gender: Male Location: Dianella, West Oz Posted 08/10/08 01:22 AM Share Posted 08/10/08 01:22 AM Im with RAP1D - Id listen to what the tuner says... Nizpro are obviously very very experienced, if not pioneers of tuning the XR6T so im sure they would have a good idea of what is holding it back and would be very well equipped to go through the elimination process to find out what it is...Saying that - It is a low number so always good to ask! Link to comment Share on other sites More sharing options...
Guest Guests Posted 08/10/08 01:26 AM Share Posted 08/10/08 01:26 AM New mufflers & gut the cat Link to comment Share on other sites More sharing options...
Worm A much better forum Silver Donating Members 3,808 Member For: 16y 3m 22d Gender: Male Location: Victoria Posted 08/10/08 01:31 AM Share Posted 08/10/08 01:31 AM Remember a gutted cat can cost $10k fine... Sometimes it is not the best option to gut it... Link to comment Share on other sites More sharing options...
Dillz Three pedals are better then two.. Donating Members 15,637 Member For: 17y 5m 19d Gender: Male Location: Melbourne Posted 08/10/08 02:02 AM Share Posted 08/10/08 02:02 AM Isn't Nizpro's new zorst like 2k? That would do the job for sure. Link to comment Share on other sites More sharing options...
Guest Guests Posted 08/10/08 02:04 AM Share Posted 08/10/08 02:04 AM Meh who hasn't got a measly $10k laying around to pay a fine?? HahaI know plenty of people who have done it here in WA & never been tested. Could be different over east though Link to comment Share on other sites More sharing options...
qikshift Member 518 Member For: 17y 11m 30d Gender: Male Location: Melbourne, Victoria Posted 08/10/08 02:48 AM Share Posted 08/10/08 02:48 AM (edited) Isn't Nizpro's new zorst like 2k? That would do the job for sure.not available till the end of the year though mate I think. Edited 08/10/08 02:49 AM by qikshift Link to comment Share on other sites More sharing options...
XR06T Silver Donating Members 4,146 Member For: 19y 4m 22d Gender: Male Posted 08/10/08 03:15 AM Share Posted 08/10/08 03:15 AM 1st post says the cat is already hi-flow.. must be a pretty horrible exhaust if it cant flow more that 300rwkw, people are pushing 350rwkw through ebay twin 2.5" cat backs. Link to comment Share on other sites More sharing options...
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