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Cam Motion's Cam recommendation...

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Old Dec 29, 2004 | 01:25 PM
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Default Cam Motion's Cam recommendation...

I am hoping for ATLEAST 700rwhp/650rwtq @15psi on 93 Octane with my 383LT1 and T76 combo. I have a FMIC and alky setup. I havent decided on what to do about the headers (either home made or PTK hotparts). I have fully ported AFR210's that flow strong all the way up to .700".

.........Intake.......Exhaust (no pipe)
.200...143............103
.300...204............141
.400...247............173
.500...281............198
.600...308............219
.700...311............227

I told Cam Motion I wanted max hp, but still pass emissions. Here is what they came up with:

223/217 .540/.542 116+4

Seems a bit small doesnt it? Especially on the lift considering my heads flow pretty good. What do you guys think, and what kind of power did you guys make with your cam/setups?
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Old Dec 29, 2004 | 01:30 PM
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Turbo cams tend to be smaller than supercharger cams. I am running a Cam Motion cam that is 236/246.
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Old Dec 29, 2004 | 01:37 PM
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I would run a smaller 220/216 with .585 lift on a 115 duration.With a Turbo you don't want to go to big because the Turbo is more about midrange.
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Old Dec 29, 2004 | 01:45 PM
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Originally Posted by Pro Stock John
Turbo cams tend to be smaller than supercharger cams. I am running a Cam Motion cam that is 236/246.
I have a custom SC cam similar in size that I was going to use with the vortech i had, but the S/C is sold.
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Old Dec 29, 2004 | 01:46 PM
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Originally Posted by Slowhawk
I would run a smaller 220/216 with .585 lift on a 115 duration.With a Turbo you don't want to go to big because the Turbo is more about midrange.
Mike's cam is 226/220 with .58#" lift?? Is he sticking with that with the new setup? I thought cam motion would utilize more lift. I am not too worried about duration...
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Old Dec 29, 2004 | 03:28 PM
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Originally Posted by RealQuick
Mike's cam is 226/220 with .58#" lift?? Is he sticking with that with the new setup? I thought cam motion would utilize more lift. I am not too worried about duration...
Just think about the design of the cam lobe. If you only have 220 degrees to reach peak lift and back down (with a hydraulic roller which means you can't have as agressive opening/closing ramps) then you can't really have insane lift because you just can't physically get the hyd. lifter to stay on a lobe that goes up really quick and reaches a high peak and then stays there only to come down quickly to close. I like solid rollers for just that reason. You can get have an agressive opening ramp and then leave the valve open for longer at higher lifts and then sharply bring it back down (the more "square" the shape of the lobe the more lift under the curve you will have and therefore more air will be allowed to enter).

If you had say 230 degrees, then maybe you'd be able to add more lift without worrying about having valvetrain issues, but they designed the cam to fit your needs so I would at least try it out before you start second guessing them.
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Old Dec 29, 2004 | 03:44 PM
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Originally Posted by LTLHOMER
Just think about the design of the cam lobe. If you only have 220 degrees to reach peak lift and back down (with a hydraulic roller which means you can't have as agressive opening/closing ramps) then you can't really have insane lift because you just can't physically get the hyd. lifter to stay on a lobe that goes up really quick and reaches a high peak and then stays there only to come down quickly to close. I like solid rollers for just that reason. You can get have an agressive opening ramp and then leave the valve open for longer at higher lifts and then sharply bring it back down (the more "square" the shape of the lobe the more lift under the curve you will have and therefore more air will be allowed to enter).

If you had say 230 degrees, then maybe you'd be able to add more lift without worrying about having valvetrain issues, but they designed the cam to fit your needs so I would at least try it out before you start second guessing them.
I hear what your saying, but there are plenty of cams out there with alot more lift and just as small duration. Ah well...maybe I'll just order it thru them and see what happens, atleast there will be doubt about passing emissions.
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