First dyno, think I have a problem

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Apr 24, 2006 | 01:59 PM

killswitch

Passenger

Posts: n/a

First dyno, think I have a problem

OK, here's the dyno run for my car from the weekend. Was done on a Dynapack at the hubs.

I was expecting standard as it just has HKS filters and Super Drager Exhaust but the second turbo seems a bit dodgy. Someone suggested I may having a sticky wastegate causing the erratic boost. The other problem is when the second turbo spools it makes a whistling sound, the guy at the dyno reckoned it could be the bearings on the way out.

Anyone any thoughts?

Ta

Torque/HP

https://static.flickr.com/48/132925838_51bb511684.jpg

Boost pattern

https://static.flickr.com/50/132925906_569baa171e.jpg

Apr 25, 2006 | 12:57 PM

Robertio

Full Member

Joined: Jan 2003

Posts: 158

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From: Scotland

If you still have the stock cat it is always worth replacing/removing it as once they start to die you lose a huge amount of bhp.
Never had any problems with the turbos themselves (except putting apex seals through them) so can't comment on them. Have had problems with wastegate actuators which resulted in the car always running a bar, but if you are getting full boost early on then that suggests a different problem.

Apr 25, 2006 | 02:31 PM

killswitch

Passenger

Posts: n/a

Thanks for replying

I'm going to get the downpipe replaced as soon as I have the cash...I have a Power FC already so no worries about blowing anything yet. May get a cat bypass done at the same time. I need to be able to put it back for an MOT that we have over here.

Thanks again!