Ian C Posted December 14, 2001 Share Posted December 14, 2001 One for the techsters. I had a snout around the engine bay last night, and located all four VSVs. Two have 1/4" pipes, two have 1/2" pipes, so there is a sort of 'lite' version of the VSV for some jobs it seems. My findings were thus - at the front of the engine, turbo side, in amongst all the tubing, there are two VSVs. One 'lite', one 'heavy'. The lite one is plumbed into what I think is the Exhaust Gas Control Valve, the thing that opens at 4000rpm and allows exhaust gas through #2 turbo. The heavy one is plumbed into a 'T' at the top of the #2 intake manifold, which leads to another lite VSV (possible the Exhaust Gas Bypass Valve?) and the manifold itself. The other connection on the heavy one hasn't got a pipe on it! Is this the wastegate VSV? Is it supposed to have no pipe on it if you have an Apexi boost controller? The pipe coming off the wastegate vents to atmosphere just above the altenator as well - should this be in fact connected to the heavy VSV? I'm trying to find reasons why the second turbo dumps all boost when switched in. My theories are - buggered turbo vanes or EGCV not opening. Any thoughts? -Ian Quote Link to comment Share on other sites More sharing options...
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