Valve Lift

Restoman,

Limits in early valve lift due to piston to valve clearance depends upon the phasing & profile of the cam lobes. The piston is stroking downward as the intake valve opens, so long as the valve doesn't open too quickly, it won't hit the piston. So the cam grinder is in control of that aspect. Ultimate valve lift will depend upon the reliability you want for this motor. These days, cam grinders are able to grind roller lobes with lifts a bit above 0.600" while maintaining good reliability.

In regards to making a cam recommendation, we need to know a bit more about your motor, what condition is it in, what other changes will you be making, what other performance parts must it operate in conjunction with, what are you attemptimg to achieve with this change, how will you be using the car, what performance aspects are important to you (drivability, reliability, fuel economy, accelertion, a certain dyno number, etc) AND what's the budget.

You'll have 2 choices in off the shelf cams, Crane or Competition Cams, and a third choice will be to use an independent cam grinder.

your friend on the DTBB

George what happened to Iskydarian?? Did they go out of business? Crower? Them too? Hard to make it in the performance parts biz I guess. Maybe I should buy an Offenhauser before something happens to them??

quote:

Originally posted by DeTom:
George what happened to Iskydarian?? Did they go out of business? Crower? ...

Oh no DeTom. They're still in business. They simply do not manufacture retro-fit hydraulic roller cams for the Cleveland. Only Crane & Comp Cams have chosen to do so.

your friend on the DTBB

Thanks George for the reply. To answer your question on my motor condition.
The block was bored 20 over new Keith Black flat top hyper pistons, Compression 10.7:1 and has an oil restrictor kit. The crank is stock, The Heads have just been redone. Polished Quenched chamber 63cc. 3 angle valve job, hardened seats, new guides, new springs(145/322) pedestals cut down, SS valves, exhaust port plates. My intake is a Weber type EFI sold by Dennis Quella with short stacks and controled by Haltech
Important aspects: drivability and acceleration. If it can hit 400hp great.
Budget: I have budgeted approx. 1K for cam, lifters, rockers, push rods and retro fit kit.

Restoman,

How do you inted to use the car? Do you have a particular powerband in mind? I normally recommend 2000 to 6000 rpm.

I'm not sure if IR fuel injection is as finicky about camshaft overlap as Webers, if so, you're out of luck with using an off the shelf grind. Perhaps Dan Jones can bail me out on this one, since he's also building a motor with IR fuel injection.

A good man to order the custom ground cam & kit from will be Mark McKeown of MME Performance. He's an engine builder with a depth of Cleveland experience, and a Mechanical Engineering degree. He will be able to spec out the cam to meet your requirements, and then get it manufactured for you. Everybody gives him high praise for both his business ethics and his products. The telephone number is: (301) 246-9225. He's in Maryland.

http://www.mmeracing.com/about.htm

Your friend on the DTBB

quote:

A good man to order the custom ground cam & kit from will be Mark McKeown of MME Performance. He's an engine builder with a depth of Cleveland experience, and a Mechanical Engineering degree. He will be able to spec out the cam to meet your requirements, and then get it manufactured for you. Everybody gives him high praise for both his business ethics and his products. The telephone number is: (301) 246-9225. He's in Maryland.

http://www.mmeracing.com/about.htm

Your friend on the DTBB

Agreed George, And if I can ever help anyone here, I'll offer my services. Mark is within a few miles of me. For once we're on the map.. "I'm in the telephone book"!!!!!!

LOL..