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What Cam for a GT-67 6.0

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Old Apr 6, 2005 | 03:54 PM
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Default What Cam for a GT-67 6.0

My brother is putting the sts system w/the gt67 on in a couple of weeks. The cam he has in there now is a 218/222 with the lift in the 560s an 113 +3. His other mods are asm longtubes(which we might take off), 918s, TT3000, shiftkit and vette servo. We are wanting something suited for the turbo and I think he would also like it to be bigger than the one he has now. I have heard many different opinions on reverse split cams and all of that stuff but if anyone has any cam opinions or suggestions on size/reverse split or not etc. I think the lsa will be on 115 or so.
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Old Apr 6, 2005 | 04:02 PM
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i think that cam would work fine for the turbo. remember that you don't have to run a massive cam with a turbo and you already have a good amount of lift. even if you ran a turbo specific cam, i don;t think the gains would out weigh the cost of changing it. JMO
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Old Apr 6, 2005 | 04:10 PM
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what about the lsa...would it be ok for boost...also, w/your cam and and boost #s how high do you spin to. My brother only spins his to 5900 and we wanted to turn it a little higher before the sts came into the picture.
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Old Apr 6, 2005 | 04:11 PM
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Also, how is your motor doing with that much boost. My bros SSS is his daily driver so i dont know if he wants it up that high yet.
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Old Apr 6, 2005 | 04:13 PM
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Im pulling to 7200.......on stock motor and a small cam
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Old Apr 6, 2005 | 04:14 PM
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Ok maybe Im not.... But stilll
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Old Apr 6, 2005 | 04:19 PM
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ha....shut up matt...now is not time for your childish games....we are talking horsepower here!
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Old Apr 6, 2005 | 04:53 PM
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i've got 228/224 .575/.576 115+4. Right now just for driving around its alright, no major issues. Under the couple runs at 11-13psi it seemed fine. Im still having STS issues so sorry I cant give you a better idea.

makani
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Old Apr 6, 2005 | 04:59 PM
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A reverse split is supposed to be better for a turbo than a forward split. The advance on that cam's lsa concerns me. The rule of thumb for lsa and turbos is:

take the average of the durations and divide by 2 -- that gives you the lsa for 0* overlap.

So in this case, the ave dur = 220, so 110 lsa is a 0* overlap for the cam. Since you are at 113 (and ignoring the advance for now), that would me you were roughly -6* overlap. I'm not sure about the advance, but I think it just takes you back to 0*.

Makani's cam is going to work very well in the 6.0L with a GT67.
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Old Apr 6, 2005 | 05:07 PM
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Originally Posted by TurboBerserker
A reverse split is supposed to be better for a turbo than a forward split. The advance on that cam's lsa concerns me. The rule of thumb for lsa and turbos is:

take the average of the durations and divide by 2 -- that gives you the lsa for 0* overlap.

So in this case, the ave dur = 220, so 110 lsa is a 0* overlap for the cam. Since you are at 113 (and ignoring the advance for now), that would me you were roughly -6* overlap. I'm not sure about the advance, but I think it just takes you back to 0*.

Makani's cam is going to work very well in the 6.0L with a GT67.
Im a little confused on the overlap stuff, I never have understood it too well. But with that being said, Makani's cam is close to what i was thinking one should look like....Makani..I am curious to who ground your cam and also are you still running stock cubes..I assume you are.
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