DrRich 1 Posted April 22, 2013 Report Share Posted April 22, 2013 Just wondering if anyone knows how much boost a C30-84 with a 75mm pulley will produce on our engines.I bought one second-hand - love it! - but have a bit of detonation around 3500rpm when I get on it. Had the charger off at the weekend chasing down a belt alignment issue and just in passing measured the pulley diameter. When I plugged this into the 'holy interweb of truth', there wasn't much info but one post in the Corrado forum, by mrfusion, suggested that Storm told him he was producing around 15psi with this set up. I was told it would produce 6-10psi - no wonder it's detonating (no compression changes or cooling aids installed).If anyone can chime in with info I'd be grateful - hate bothering the busy people at Stealth or Storm when I didn't actually buy it from them (so I'll bother you lot instead!). Link to post Share on other sites
craggsy 91 Posted April 22, 2013 Report Share Posted April 22, 2013 I can't remember the sizes of the pulleys I had with my rotrex. I know one was a 6 psi pulley and I often saw 8 psi with it, also had another one but can't remember what it was for but was more than 6 psi Link to post Share on other sites
DrRich 1 Posted April 25, 2013 Author Report Share Posted April 25, 2013 OK cheers Craig. Better get a proper boost gauge hooked up then - currently using a Gunson LoGauge - which actually works quite well but I can't look at that and the road at the same time... Link to post Share on other sites
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