G60ING 0 Posted January 23, 2003 I'm running a 260 cam and when I ran a 68mm I used to see 20psi but that was with my flowed charger and a larger crank pulley 18 with a stock 1990 crank pulley. Before with a stock G60 charger and a 68mm with a stock 1990 crank pulley I used to see 16psi. Now these numbers are at 6500rpms(ie right at the rev limiter :shock: ) But I have the ISV rerouted so that the hose no longer runs into the boost return pipe but rather into the boost pipe feeding the throttle body. This puts equal pressure on both sides of the ISV and does not allow any pressure to bleed off. This so that the ISV will not bleed boost above .8bar. How do I know that the ISV bleeds boost, well this video tells me so: http://www.redrado.net/GCharger.wmv At: 3min 45sec into the video the ISV bleed off is mentioned. Quote Share this post Link to post Share on other sites
