Thread: Ultradyne cam question

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ok so i went to a swap meet and i found a BBC cam and lifters for $150 and i talked the man down to $100 and i bought them, the cam and lifters came out of a drag boat with 1.5 hours on them they looked good, the cam was and Ultradyne solid roller and i am not sure on the lifters but i assUme they are the same, the specs on the cam are:

cam grind: BB286/300R-7

Cam serial: A6191

lift: IN 685 EX 670

lobe lift: IN .4033 EX .3944

duration (ADV) IN 286 EX 300

duration@.050" IN 255 EX 264

LSA: 107

What compression do i need for it, whats the RPM range, and is it streetable at all?

it is going into a 74' nova with 454, a muncie m21, 3.43 gears(will change),

3100#, ported and polished 781 heads, and haven't decided on anything else.

thanks,

Randy

The man who made Ulta-dyne cams is a frequent visitor at Team Chevelle, mostly in the Performance forum. I cannot think of his name but he seems like a really knows his stuff on cams. He is highly respected over there. He has recommended losts of cams to lots of guys. Try there, maybe someone will have that cam and can help you. Edd

lifters with hippo are nice add oil to cam lobe. they have a small hole in the body . the cam can work on the street .i run much bigger but your going to need some CH . on a 107 it will hop like a fog in a hot pan . 1 and 2 gear will be fun with a stick

Originally Posted by uppster

The man who made Ulta-dyne cams is a frequent visitor at Team Chevelle, mostly in the Performance forum. I cannot think of his name but he seems like a really knows his stuff on cams. He is highly respected over there. He has recommended losts of cams to lots of guys. Try there, maybe someone will have that cam and can help you. Edd

His name is Harold Brookshire. You can reach him @ 662-562-4933. Email addy is brookshire@panola.com

I think the intake centerline is 101 ATDC and the exhaust centerline is 113 BTDC. That would give you the lobe separation angle of 107 degrees. If that's true, then at 0.050" tappet lift, the intake would open at 26.5 degrees BTDC and close at 48.5 degrees ABDC. The exhaust would open at 65 degrees BBDC and close at 19 degrees ATDC

If you installed the cam straight up on the 101 intake centerline with the intake closing at 48.5 ABDC, the static compression ratio to dynamic compression ratio would work out like this.....
9.8:1 static....7.950:1 dynamic
10.0:1 static....8.108:1 dynamic
10.2:1 static....8.266:1 dynamic
10.4:1 static....8.424:1 dynamic
10.6:1 static....8.582:1 dynamic
10.8:1 static....8.740:1 dynamic

Originally Posted by pat mccarthy

you will need a good oil like joe gribbs or bran penn with a hi zddp. that cam at low speed at idle can wipe(low oil splash) that is abit of lift .the last cam that big i used the EDM lifters that add oil to cam lobe. they have a small hole burnd thru them by a EDM machine . the cam can work on the street .i run much bigger but your going to need some CH . on a 107 it will hop like a fog in a hot pan . 1 and 2 gear will be fun with a stick

You don't need High Zddp oil for Roller Cam .... Why do you think the reason all newer cars and truck went to roller cam???? EPA is making oil companies take out Zddp.

Originally Posted by Racecar100

You don't need High Zddp oil for Roller Cam .... Why do you think the reason all newer cars and truck went to roller cam???? EPA is making oil companies take out Zddp.

WELL HELL I KNOW THAT .WHAT I DID NOT KNOW IS I CAN NOT SEE ANY MORE HELL I BEEN RUNNING BIGGER ROLLER CAMS THEN THAT ON THE STREET for 20 years.I WAS THINKING IT WAS A FLAT LIFTER CAM now i going to find a seeing eye dog and yes i still would use brad pen oil in it ... you must not read many of my post racecar100 then you would know i knew this just having a hard time looking thru my eyes today