Looking at something along the lines of the Lunati VooDoo 60122 or Comp XR282HR for a 5.7 rod 383 with either AFR eliminators or Brodix IK's. I am still undecided on 180 or 195/200 versions. CR is also up in the air. I am trying to decide between a 12cc dish (9.5) or flat top(10.1:1)

Show truck with 4.86 gears,32" tires and a TH400 that will participate in cruises/rod runs.

Lunati 60122 231/239 282/290 .535/.550 110 LSA

Comp XR282HR 230/236 282/288 .510/.520 110 LSA

Anyone running a simular combo or have some input?

Thank you!

the voodoo looks good.
Comp should be higher - around 10.5:1
Heads should be 200-210 for a heavy car.

google the joe sherman 383 build, similar compression (10.1) but used the comp xfi lobes.

That's about the same cams Bullet & Comp recommended for mine. 9.7-1 AFR 190's
The Bullet would be the older Ultradyne.

10.5 to 1 here with the full roller 383 and a .021 thick copper head gasket. I am using the 400 rods however, with iron World II heads. I have a Crane Cams HR-284-2S-12 IG Part # 119831. The specs are: Lift intake@cam 339@Valve 509 Exhaust@Cam 352@528 with a 1.50 rocker arm ratio. The advertised duration is 284.0 intake 292.0 exhaust. The range of the cam is from 2500 to max rpm 6000 and float at 6500 naturally. This may be more cam than you like but I like a good rumble at idle and if you're actually pulling anything with the truck, you might want some more low end.

Same cam I'm using, with the new afr 195 heads. That cam will like the flattops. I run 92 octane with no detonation, haven't tried a lower grade yet. Pulls hard even with my 3.31 gears.

BTW unless you have a modern roller block you'll want the 60112, same cam but for older blocks. I'm sure you knew that, just a heads up!

Same cam I'm using, with the new afr 195 heads. That cam will like the flattops. I run 92 octane with no detonation, haven't tried a lower grade yet. Pulls hard even with my 3.31 gears.

BTW unless you have a modern roller block you'll want the 60112, same cam but for older blocks. I'm sure you knew that, just a heads up!

Yes,I have a late model block. Do you think the GM hydraulic rollers,guides and spider are a bad idea? The Lunati does have quite a bit of lift.

Thanks for the info!:)

10.5 to 1 here with the full roller 383 and a .021 thick copper head gasket. I am using the 400 rods however, with iron World II heads. I have a Crane Cams HR-284-2S-12 IG Part # 119831. The specs are: Lift intake@cam 339@Valve 509 Exhaust@Cam 352@528 with a 1.50 rocker arm ratio. The advertised duration is 284.0 intake 292.0 exhaust. The range of the cam is from 2500 to max rpm 6000 and float at 6500 naturally. This may be more cam than you like but I like a good rumble at idle and if you're actually pulling anything with the truck, you might want some more low end.

I was looking at that cam also. I figured at least 10:1 with that cam. Not going to pull anything so it may work fine.

Thank you!:)

I would like to check with UDHarold also. Is he still in the cam grinding business with some other than Lunati?

Yes he is. On the other, I'm not sure - I've never owned a roller block and therefore don't know alot about them.

I was running the XR282hr Comp in my 355 until I lost the fuel pump lobe. Harold is grinding his version of this cam 282/290 with his ramp designs. I am using the AFR 195 heads now and they will all go into a 383 and he agrees with this cam for this motor. . I ended up using SRP 16cc dish piston with 6.0 rods. Comp is 9.9 with 64 cc head. If Harold get his cores in as he expected, I could have the cam any week now.

Harold, you there?

I was running the XR282hr Comp in my 355 until I lost the fuel pump lobe. Harold is grinding his version of this cam 282/290 with his ramp designs. I am using the AFR 195 heads now and they will all go into a 383 and he agrees with this cam for this motor. . I ended up using SRP 16cc dish piston with 6.0 rods. Comp is 9.9 with 64 cc head. If Harold get his cores in as he expected, I could have the cam any week now.

Harold, you there?

Lost the fuel pump lobe? how much time on the motor? How did you like the cam for your combo,until the lobe failed of course:(

Do you have the other specs for Harolds 282/290 cam?

Thanks

i just got done assemblying my short block with the 60122 cam.
im reusing the stock lifters, tie bars, and spider.
im also using flat tops, should be around 9.7:1 with 64cc heads.

harolds cam is very similar to the 60122.there is a post on here with his new cams he is designing.



aaron

Lost the fuel pump lobe? how much time on the motor? How did you like the cam for your combo,until the lobe failed of course:(

Do you have the other specs for Harolds 282/290 cam?

Thanks
There was prolly 500 mile on the Comp cast roller, I was told that I could use the stock fuel pump pushrod with the stock pressure / volume fuel pumps even though I wanted to use the brass tip. Well did not make it. I went to quiet Carter electric. Motor pulls good, no valve float but I was running 1.5 valve springs. I had intended to use it with my 383 until I tore it down and also found a "flaked" spot on one lobe opening ramp. So I heard about Harold and gave him a call. He said he was replacing the comp cams with his own version but in billet. I like his theory about closing ramps. . Its been about a month now, no cam yet, he said he was having core availability issue.
Only other cam I was looking at was the bullet design that was recommended. Still waiting on Harold. Guess good things are worth the wait. I have specs on Harolds cam and there close but on a 112° LSA. It will be ground on a small base circle , just for safety. I have profiled Compstar rods and they have been known to clear .600 lift cams, Harolds cam is about .550.

i just got done assemblying my short block with the 60122 cam.
im reusing the stock lifters, tie bars, and spider.
im also using flat tops, should be around 9.7:1 with 64cc heads.

harolds cam is very similar to the 60122.there is a post on here with his new cams he is designing.



aaron

Aaron, do you know if this cam 60122 has the same valve closing ramp design as harolds? Same theory? Easy on valve train? Whos cam is the 60122? Lunati?

don

yes its a lunati voodoo roller.

harold is responsible for creating the voodoo series cams. not sure of he is also responsible for the rollers or not.


The most popular hydraulic roller that I make right now is the 288/296, 233/241 at .050, 158/164 at .200, and .563"/.563", with the next the 282/290, 231/239 at .050, 156/162 at .200, and .552"/.552" valve lift, all with 1.5s.
The 288/296 made well over 550 BHP in our 426 cid 6.1L test Hemi.....
No "SMN".....
I make others, larger and smaller. tell me what you want.
The 282/290 is available now, with more lift on the intake than the 60122. The profiles are different from the VooDoos, but both were designed by the same man, me.

I am not trying to take this thread over but Im curious to know more about the camshaft material itself.

It does seems to me Harold would have it straight. How do you really know what these are made of! Are they cast iron or steel or maybe even some sort of cast-steel. It get mixed up at times.

I was told last Tuesday by Crane that there hydralic roller cams in the catalog are cast not steel? This is for an early BB retrofit

Harry P.Hunter

his are billet i belive. and ground on a landis 3L

aaron

To me a cam around 230 @ .050 needs around 10.5 compression.

All voodoo cams are billet steel cams.

Harold only uses billet at his new company.

You can get roller cams in cast or billet, Its becoming apparent that billet is the way to go as profiles become more agressive. Harold mentioned they use the 8660 steel cores. Retro Roller is just a term where you add linked roller lifters in pre factory roller blocks. Factory roller blocks allow you to make used of the less expensive roller lifter and spider hold downs .

We only use steel cores for our roller cams. There are two types we use:

-induction hardened 8660, with a pressed on "everwear" gear for compatability with cast dist. gears

-carburized 8620, with a machined steel gear for bronze dist. gears

Both types are the same price. Some of the "everwear " gear cores are a little difficult to obtain at times.

We only use steel cores for our roller cams. There are two types we use:

-induction hardened 8660, with a pressed on "everwear" gear for compatability with cast dist. gears

-carburized 8620, with a machined steel gear for bronze dist. gears

Both types are the same price. Some of the "everwear " gear cores are a little difficult to obtain at times.

Im still not exactly sure of what you mean? Induction hardeend sound like its only heat treated to certain depth

Is the 8660 core a cast steel part? If so that means its still a cast cam

I go way back when Pontiac had cast conecting rods that failed regulaly. These were steel rods but still cast not forged. Is that the same here, is the induction hardened cam a cast one or is it machined from one piece?

Please give straihgt answer if you know for sure.

Will 8660 camshaft handle spring pressures the same as the the 8620s?
200 pounds closed and 600 pounds opened with around 700" valve lift?

Harry P.Hunter

Yes, the heat treat has a certain "case" depth. Through hardening the barrel just makes it brittle.

Both types are forged billet. No castings here.

Both are capable of 300/750 seat/nose pressure, .875 lift for 100+ passes @8800RPM

Yes, the heat treat has a certain "case" depth. Through hardening the barrel just makes it brittle.

Both types are forged billet. No castings here.

Both are capable of 300/750 seat/nose pressure, .875 lift for 100+ passes @8800RPM

Thank you

Harry P.Hunter