quote:Originally posted by "72 GTS:
Doug,
Thanks for your help
any other cam advice ( I 'd preferably stay in a 7000 Max Rpm range)
Any power prediction then ?
Philippe
You build the engine for 8,000 then set a rev limiter at 7000.
You are looking at around 490 to 500 with a Holley and around 550 with Webers with iron heads. Another 40 to 50 hp with a good set of high port aluminum heads.
Torque with either heads is right around 500 at 4500 rpm. Comes in a little lower with the Webers. Maybe 4,000 to 4200.
That's good for the ZF. Seems to have a maximum load capacity of around 550ft-lbs under duress.
180 degree headers will give you more hp and torque too. Maybe another 50hp and 25-30 ft-lbs of torque. You tune those with the size of the tube and the lengths of the primaries.
You need 2" tubes to tune it right. 1-3/4 are too small.
So you could get 650 OR MORE...EASY with a few parts changes.
That will get you right into the hp range of the current vintage racers. Those cars are fast.
The old rule of thumb for the cleveland is that the lift equates to the hp,i.e., a .600" lift cam will give you 600hp, etc.
Make sure your setup holds you in the seat tightly. This thing is fast. Easy 12 second 1/4 mile car.
Mike Cook took Gary Halls GTS with this set up, changed the ring and pinion to 5.38:1 and put it into the 9 second 1/4 mile times. With a single Holley 750dp.
The thing would pull the front tires off of the pavement.
Very close in nature to a good 427 Cobra.
The Cobras you would see them twisting the chassis when they would pull the wheels.
The Pantera is stiffer believe it or not?
Takes a lot of practice to use this much power.