some cam help????

[NorCam]

I've had the pleasure of dealing with Dave a couple of times. Great advice and a good education came from those talks. I've been a big fan of their products ever since. As a matter of fact, I chose their 294FDP grind for another motor completed a few weeks ago. It can be heard running in this 383 video that was just built for my 69 car. It'll be topped with a Crossram and is also running the cloned Trickflow -175 heads. They actually flow really well.



Can't go wrong with Crower!

[x33rs]

I like those factory cams mentioned but there is power to be found. I like to build PS engines and then skirt with the rules. Camshaft is one area I find power with even just a little bit of wiggle room. Since you're playing without rules I'd go roller for sure and enjoy all the benefits.

On my DZ I built the 302 per the PS rules, which state duration @.050 within 1% and lift at the valve within 2% of advertised. To take advantage of this with the solid cam I employed some knowledge of a good friend/engine builder that knew what would work well with stock unported heads.

Stock lift is advertised .485 but when you figure lash at .030 lift is only .455 so we changed the lobe profile to .495" lift with tight lash of .014" so lift at the valve falls in at .481", moved the duration a pinch and put the lobe sep where he felt would work best with the manifolds and exhaust system being used. A little trickery with the cam but within the rules. I kept compression at a true 11:1 (didn't use the 1.5 allowance) so the engine would be happy on pump gas. I'll assume that is also one of your requirements. Keeping iron heads and 11:1 requires attention paid to off seat timing and intake valve events.

The result was 402 hp on the dyno at 6700 and held pretty flat to 7200 on 91 octane.

Here's a quick idle clip. Makes 9 inches of vacuum up here at 5,000 ft. and more like 13 inches at sea level, very docile to drive, wife daily drives it, and it knocked down 17 mpg on the last highway trip we made, with an M-20 and 3.55's. It would run AC fine, if these cars had AC that is.

https://youtu.be/IZ0HlEY7b74

Here's a driving clip shifting at 7,000 at about 1:20 in. I like the cam, it works well with the 3.55's and the 4.88's. Nice smooth endless power band but if I were you and not worried about rules, I would have went a completely different direction.

https://youtu.be/5vX6hVQ_cKw

[firstgenaddict]

Originally Posted by NorCam

I've had the pleasure of dealing with Dave a couple of times. Great advice and a good education came from those talks. I've been a big fan of their products ever since. As a matter of fact, I chose their 294FDP grind for another motor completed a few weeks ago. It can be heard running in this 383 video that was just built for my 69 car. It'll be topped with a Crossram and is also running the cloned Trickflow -175 heads. They actually flow really well.



Can't go wrong with Crower!

X10... pure pleasure listening to him describe cam shafts... the man is an incredible genius... take advantage of his EXPERIENCE. If you understand the mechanics of a cam he is something else.

[x33rs]

If you can get him. I assume he's a busy guy, I've had trouble getting feedback from him in the past. Just had a set of his best solid rollers fail in an engine here within 3,000 miles with only moderate (the recommended) spring seat pressure of 240 lbs.

I prefer to deal with Paul and Jeff at Koerner Racing. They dealt with Harold Brookshire for decades and are very familiar with his lobes, especially the newest stuff he was working on before he passed, which I understand no one else has access to. Some of the best stuff I've seen to date.

[aaronkl84corvett]

Thanks all - -

I wound up ordering a cam from Chris Straub - we'll see how it does -

Probably a couple months off from having the car put back together -