Turbo Boost

[sb930turbo]

I'm only getting 0.6 Bar boost max,I understand it should be 0.8 Bar.
Are there any other causes for this other than the Diaphram in the wastegate?What sort of cost would I be looking at to rectify this?
Cheers
Steve

[iguana]

How do you know you are only getting 0.6 bar?? if its from the dash read out ignore it as they are so unreliable you need a professional boost gauge to measureit acutatly anyway.

But the boost presure does drop on older cars as the wastegate diaphram gets shagged with age & use, so it can get as low as 0.4 bar. My advice is get the wastegate diaphram replaced and at the same time bung a stronger 1 bar boost spring in there. The spring cost sod all like £20 quid its just the fitting thats a bit pricey coz of the labour involved.

The performance increase is very noticeable and causes no more grief to the componants. You can get 1.2 bar springs but you really must uprate othet bits if you go that far.

[k27]

I would go with an aftermarket wastegate like the Tial or Delta.

[Thom]

It also appears that turbocharged Porkers are extremely sensitive to climatic pressure change...(a 944 Turbo Cup was one day measured at 277bhp, another day at 302bhp...)

>> Edited by Thom on Sunday 29th September 09:46

[Ultra Violent]

Get it on the rolling road at G-Force, they measure boost as well as BHP, then get the 1 bar spring.

[k27]

quote:
It also appears that turbocharged Porkers are extremely sensitive to climatic pressure change...(a 944 Turbo Cup was one day measured at 277bhp, another day at 302bhp...)

Absolutely true, my car pulls much harder on cool damp days, real seat of the pants difference.