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Lunati Cam???

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Old 01-25-2007, 08:45 PM   #1
james.frazita
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Default Lunati Cam???

I have a 1968 427, 390 HP Vette with M-21 tranny and 4:11 rear end. I am using an Elderbrock AVS 800 CFM carb. Compression is 9.73:1 and the heads are closed chamber 98.4 cc. Has anyone had experience with a Lunati 302A8LUN hydraulic or 402A2LUN solid lifter cam??? Looking at also buying th 65001LUN kit with springs, lifter, etc.... Any other options you would recommend?

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Old 01-26-2007, 12:14 AM   #2
itsonlyairandfuel
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I'm running the 402A3LUN,with 4.56, 3000 stall, turbo 400 and 10-1 comp 454. It idles at 10 inches of vacuum, 15 at 3000rpm. Performance easy 7.80@89 MPH in the 1/8 with a DA of 5000 plus. Yours should idle better and be comparable. I used Howards solid EDM lifters with it. Do a search or call their tech line. Ron B.
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Old 01-26-2007, 01:20 AM   #3
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Quote:
Originally Posted by itsonlyairandfuel View Post
I'm running the 402A3LUN,with 4.56, 3000 stall, turbo 400 and 10-1 comp 454. It idles at 10 inches of vacuum, 15 at 3000rpm. Performance easy 7.80@89 MPH in the 1/8 with a DA of 5000 plus. Yours should idle better and be comparable. I used Howards solid EDM lifters with it. Do a search or call their tech line. Ron B.
That's a fine cam you have there Ron!

James, I didn't look up the specs on your cam but I assume it's a step milder than Ron's & mine. Just a few words of caution though- with the closed chamber heads I'm running I found that I had to relieve the pistons for the valves (exhaust if I remember right) in order to obtain enough valve to piston clearance. My pistons were milled at the time of my original rebuild to give me 9.5 to 1 comp. ratio but without digging through my old reciepts I can't tell you any more specifics about them except that they are forged aluminum.

With any increase in cam you should check for valve/piston clearance anyway, so this is more of a reminder anyway. Good luck.
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Old 01-28-2007, 01:15 PM   #4
james.frazita
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Default Git it!

THANKS! One of the reasons I am concerned is that the relief on the L2300F pistins might not be enough. When I took the heads off, I had 10 BENT valves! With the 4:11 rear end I probably over reved the engine. (hydraulic lifters) I want to protect against this in the future by either going to soild or roller cam. I will be checking clearances with clay this week.

Jim

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