boost controller

screamer69 · Post by **screamer69** » Sun Jul 09, 2006 2:33 pm

can anybody tell me the best valve to use for the boost controller in the uk please

many thanx

fritoss007 · Post by **fritoss007** » Mon Jul 10, 2006 6:44 am

same question from myself...but for the US ??

thanks alot !

superchargingmachine · Mon Jul 10, 2006 8:31 am

I don't know about the best valve but I do know that the GM CK 6.5L diesels used a PWM vacuum valve to control the actuator. Should work in a pressure based system I would think.

I think some Subaru and SAAB vehicles use PWM solenoid's too. Can anyone post specific vehicle's that use them?

IanS · Post by **IanS** » Mon Jul 10, 2006 11:55 am

I've heard of people using the VW/Audi Bosch N75 valve. Its a standard 3 port solenoid setup. All the 1.8T engines have one.

The GM one might be fairly equivalent and probably cheaper, though.

If you want to try to snag one for cheap, post on VWVortex in the classifieds and someone might be selling their stock one. Some 1.8T guys 'upgrade' their N75's to ones which allow more boost. Its probably just a smaller orifice on the boost line side, but it means a few people will have extra ones they're not using.

screamer69 · Post by **screamer69** » Tue Jul 11, 2006 3:57 am

does the boost controller work with externall wastgate

Jon k · Post by **Jon k** » Thu Jul 13, 2006 5:15 am

screamer69 wrote:does the boost controller work with externall wastgate

It'll work with internal or external wastegates.

baldur · Post by **baldur** » Sun Jul 16, 2006 3:55 pm

I have observed that many of these valves have a pretty long response time, so at relatively low duty cycles they won't open at all and high duty cycles they won't close at all so maybe PWM control isn't all that good for some of those valves, perharps a frequency control consisting of fixed length pulses would do the job better?