3.0 vs 3.2 cams - some calculations

[jayro]

Is anyone making a true aftermanket set of cams yet?

I need to see at least 275ft/lbs and 300hp to use this engine in a desert truck turning 35" tires.

300chp is possible with a lot of bolt ons ect, but the torque number wouldn't be there. I know it's 17 percent loss to the wheels for a quaifed/wavetraced for hp, is it the same to find the torque # at the crank?

 

[rbruso]

Is it the same to find the torque # at the crank?

Short answer: Yes.

Long answer: Yeeeeeeessssss.

 

[jayro]

Short answer: Yes.

Long answer: Yeeeeeeessssss.

Thank you sir.

 

[javve]

Time to revive an old thread. Does this seem to hold true? Did anyone ever get Dyno numbers of the two? From the looks of this it is better to stick with the 3.2 cam in a 3.2 rather than put a 3.0 cam in the 3.2 and have an extra item to list as a mod.

 

[jayro]

Time to revive an old thread. Does this seem to hold true? Did anyone ever get Dyno numbers of the two? From the looks of this it is better to stick with the 3.2 cam in a 3.2 rather than put a 3.0 cam in the 3.2 and have an extra item to list as a mod.

I don't believe there is alot of hard data on this. It is all pretty much the seat of the pants type stuff (which is sketchy at best). From talking to a number of people that have driven both in the same car/motor....I was told that the biggest thing that they noticed was that the car pulled to a higher Rpm with the MTX cams. When I say higher I mean a few 100 rpm's higher, not to 8k. This could benefit other breathing mods to the engine more than ATX cams. With ATX cams you have a little more torque lower in the RPM band which some like for DD. In all honesty the difference is minimal and wouldnt make that much of a performance difference either way. our engines have low torque anyway and 15ft/lbs isnt gonna matter that much. I don't think drivability would be effected much either. I have aftermarket cams, lightened flywheel and a stage 3 clutch. After about a minute in the car to get used to everything it is perfectly drivable.

 

[javve]

I don't believe there is alot of hard data on this. It is all pretty much the seat of the pants type stuff (which is sketchy at best). From talking to a number of people that have driven both in the same car/motor....I was told that the biggest thing that they noticed was that the car pulled to a higher Rpm with the MTX cams. When I say higher I mean a few 100 rpm's higher, not to 8k. This could benefit other breathing mods to the engine more than ATX cams. With ATX cams you have a little more torque lower in the RPM band which some like for DD. In all honesty the difference is minimal and wouldnt make that much of a performance difference either way. our engines have low torque anyway and 15ft/lbs isnt gonna matter that much. I don't think drivability would be effected much either. I have aftermarket cams, lightened flywheel and a stage 3 clutch. After about a minute in the car to get used to everything it is perfectly drivable.

Sounds like it is worth doing if I plan on doing other mods such as the intake and Maf mods. It appears that is where it is one of those mods that doesn't do as much by itself but with other mods it makes a difference. I plan to get a 3.2 then rebuild the motor anyway, so changing the cams would not be that big of a deal. Would much rather do the timing belt and chains while the engine is out of the car anyway. The rebuild is so I can turbo the car without tearing up the engine or tranny (will do a differential at that time too).

Thanks for the input on that.