Anyone use the purple shaft "533" hydraulic cam in a 440?

[minnesota guy]

I picked up a Mopar 533 hydraulic cam as a back up to do some testing on a 6 pack pistoned 440 with ported 906 heads. In my 71 Cuda. 4:30 gears, and 9.5 Dynamic converter. Hooker Comp headers with 3 inch TTI exhaust. It ran a 11.68 @115 on a STH-42 hydraulic Racer Brown cam with .520 lift.

Just curious if anyone running this large hydraulic and what kind of 1/4 times..in an RB motor.

Thanks.

Jeff

 

[Meep-Meep]

I don't recall seeing a ".533" purple shaft for a big block. ".528" yes. I ran the .528 in a 383 and it was fantastic. Put a 3700 lb B body into the high 12's with mostly stock parts. And it was not a 383 stroker.

 

[67 B-body]

I cant say I've ever heard of the .533" lift either.....
I've used the .509 hyd camshaft in my 69 R/R, And the .590" Solid cam with 1.6:1 ratio rockers in my 67 now....
Both are 440's standard stroke...

 

[lewtot184]

the 533 is mopar's bigger hydraulic than the 509.

 

[Meep-Meep]

the 533 is mopar's bigger hydraulic than the 509.

I guess I'm dating myself! The 509 was the biggest hydraulic for years.

 

[lewtot184]

I guess I'm dating myself! The 509 was the biggest hydraulic for years.

it's been out for several years. 320/320, .533 lift, 108lsa, 104 degrees overlap. if you ever thought the 509 was awful, the 533 should send your directly to the rubber room.

 

[minnesota guy]

it's been out for several years. 320/320, .533 lift, 108lsa, 104 degrees overlap. if you ever thought the 509 was awful, the 533 should send your directly to the rubber room.

It is a huge hydraulic cam! It was made for about 10 yrs or so and now I don't think they make it anymore. But I am still curious if anyone has used it and results. :hello2:

 

[Meep-Meep]

Well, looking at Lew's post with the specs, you better have that distributor locked at 38 degrees and about 11:1 compression. Not a street cam but I bet if all done right it will make some serious power.

 

[lewtot184]

i think it's a comp cams race hydraulic profile for big cube engines. i have a friend who has a 500 cube olds with a comp cams hydraulic roller, 108lsa-100+ degrees overlap, it idles at 1" of vacuum in gear, 5" in nuetral, with a locked out distributor. these cams have close to 270 degrees at .050 lift.

 

[minnesota guy]

Well, looking at Lew's post with the specs, you better have that distributor locked at 38 degrees and about 11:1 compression. Not a street cam but I bet if all done right it will make some serious power.

Actually, I have better results with them at 40-42 degrees. 38 degrees< my car slows down. 2 sets of 906 Heads that was with. "Mr. 6 Pack" Bob K recommends 40 degrees as well on a stock 6 pack car. I run 11:5 compression. I have tested a a few cams....

Thanks!

 

[Meep-Meep]

Actually, I have better results with them at 40-42 degrees. 38 degrees< my car slows down. 2 sets of 906 Heads that was with. "Mr. 6 Pack" Bob K recommends 40 degrees as well on a stock 6 pack car. I run 11:5 compression. I have tested a a few cams....

Thanks!

It's possible the piston dome gets in the way thus requiring more timing. Whatever works is the bottom line. But you might also try different fuel (faster burning) to see if you can back down on the timing.

- - - Updated - - -

i think it's a comp cams race hydraulic profile for big cube engines. i have a friend who has a 500 cube olds with a comp cams hydraulic roller, 108lsa-100+ degrees overlap, it idles at 1" of vacuum in gear, 5" in nuetral, with a locked out distributor. these cams have close to 270 degrees at .050 lift.

Any less vacuum you might as well use a pressure gauge! I have a buddy with a 57 Chevy that idles at 2" in gear. It has some thumper cam in a stock 396. I don't want to be near a 500 cube Olds when that cam starts to work!

 

[lewtot184]

meep, that 500" olds is bad to the bone! but, in my opinion, 100+degrees overlap with a hydraulic tappet, even in a big engine, for the street is a major tuning headache for the average guy.

 

[minnesota guy]

It's possible the piston dome gets in the way thus requiring more timing. Whatever works is the bottom line. But you might also try different fuel (faster burning) to see if you can back down on the timing.

- - - Updated - - -



Any less vacuum you might as well use a pressure gauge! I have a buddy with a 57 Chevy that idles at 2" in gear. It has some thumper cam in a stock 396. I don't want to be near a 500 cube Olds when that cam starts to work!

I run flat top 6 pack pistons....No dome to get in the way. I mix 50/50 110 race gas with 91 pump. Anyway, I hear the crickets with guys using the 533 bb hydraulic.

 

[Meep-Meep]

meep, that 500" olds is bad to the bone! but, in my opinion, 100+degrees overlap with a hydraulic tappet, even in a big engine, for the street is a major tuning headache for the average guy.

No doubt!

I'm running a very mild 455 Olds in my jet boat and it's great.