low boost d1sc
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low boost d1sc
I currently have a 3.4 head unit pulley and a 7.5 crank pulley which should put my blower spinning about 66000 rpm at 6700 engine rpm. I have verified that I have no leaks and no belt slip but I am only making 11# of boost. Right now I have a big red valve is it possible that the valve needs adjustment? I am at about 5000 ft elevation right now and I know that will have some effect but there are other d1 cars here that make 18 #. Another thing that might have something to do with it is the 6 degrees of overlap on my cam?
Background: ls1 with ls6 heads, 102 intake, 228/232 on 112
Background: ls1 with ls6 heads, 102 intake, 228/232 on 112
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I currently have a 3.4 head unit pulley and a 7.5 crank pulley which should put my blower spinning about 66000 rpm at 6700 engine rpm. I have verified that I have no leaks and no belt slip but I am only making 11# of boost. Right now I have a big red valve is it possible that the valve needs adjustment? I am at about 5000 ft elevation right now and I know that will have some effect but there are other d1 cars here that make 18 #. Another thing that might have something to do with it is the 6 degrees of overlap on my cam?
Background: ls1 with ls6 heads, 102 intake, 228/232 on 112
Background: ls1 with ls6 heads, 102 intake, 228/232 on 112
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#6
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Between your elevation and your overlap, I'd say you don't have any boost leaks. At 5000 ft you're not going to make a lot of boost with a D-1SC. The only way someone there is making 18 psi with a D-1SC is with clogged cats, or on a very small displacement engine. A D-1SC at 900 ft on an LS1 with a cam and headers is doing well to make 16 psi. Bob
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