Building 402 motor, what heads/cam
10-06-2004, 04:02 PM
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Building 402 motor, what heads/cam I am going with a 402ci (probably the SLP ZL-402, not sure yet)
It is going to be a mostly drag car, maybe driven 2 times a week at most. I am also converting to a TH400 and will be spraying a 200shot.
So with the 402, I was thinking about the LQ9 heads and a cam something similiar to what SLP used to get 575 on the dyno
256/256 621/.603 112. For the cam, I might do better with a split duration for the spray???
I have all the other goodies already, LS6 intank, oil pump, fuel pump, timing chain, etc.
So would this be a good combo for the 402 to optimize the power? I like the "window shaker" type of lope and want a real agressive motor.
It is going to be a mostly drag car, maybe driven 2 times a week at most. I am also converting to a TH400 and will be spraying a 200shot.
So with the 402, I was thinking about the LQ9 heads and a cam something similiar to what SLP used to get 575 on the dyno
256/256 621/.603 112. For the cam, I might do better with a split duration for the spray???
I have all the other goodies already, LS6 intank, oil pump, fuel pump, timing chain, etc.
So would this be a good combo for the 402 to optimize the power? I like the "window shaker" type of lope and want a real agressive motor.
10-06-2004, 06:50 PM
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if your looking for a nitrous cam, you should get a split duration, talk to FMS to find out what they recommend. also, if you will be spraying that big of a shot, and it will be mostly a drag car, you might want to get a higher lsa cam as well, so the pressure doesnt bleed it off through the overlap.
10-06-2004, 07:58 PM
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I just built a 427 with PP LS6 stage III heads and a t-rex and put down 560rwp at 6500rpm and 601 rwtq from 2700rpm to peak at 4600rpm with a base tune, I will post a graph when It is tuned and broke in. The tune said that we can likley get another 40+ hp out of it.
Last edited by hydfixer; 10-06-2004 at 08:05 PM. Reason: more info
10-06-2004, 08:32 PM
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Originally Posted by hydfixer
I just built a 427 with PP LS6 stage III heads and a t-rex and put down 560rwp at 6500rpm and 601 rwtq from 2700rpm to peak at 4600rpm with a base tune, I will post a graph when It is tuned and broke in. The tune said that we can likley get another 40+ hp out of it.
10-06-2004, 08:40 PM
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Originally Posted by chety
thats hard to believe
Last edited by hydfixer; 10-06-2004 at 08:42 PM. Reason: more info
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10-06-2004, 09:06 PM
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Originally Posted by hydfixer
I just built a 427 with PP LS6 stage III heads and a t-rex and put down 560rwp at 6500rpm and 601 rwtq from 2700rpm to peak at 4600rpm with a base tune, I will post a graph when It is tuned and broke in. The tune said that we can likley get another 40+ hp out of it.
