Cam selection.. isky.. engle... lunati

[SilverXJ]

After my Comp Cam failed I think I want to look at other avenues, as I have had a bad lifter from Comp previously as well. I'm looking at the Lunati 63501, the Isky 133125/26, and possibly a Engle cam, but haven't heard back from them for a grind recommendation.

Also Isky recommended me this custom grind:
.464 intake lift
.480 exhaust lift
adv duration: 258 intake, 264 exhaust
duration at .050": 208 intake, 214 exhaust
112 lobe center

Seat:Open Close
Int 20 58
ex 67 17

.050:open close
int 5 33
ex 42 8

1800-5800 range


I liked the performance of the Comp, but would like a little better idle quality (although the idle was nothing to bitch about), and a quieter valve train. This is on my daily driver.

Opinions?

[crustodd]

Hey,
I have the Lunati in your list and I like it. It's a bit noisy at times what with the RR' and the profile snapping the valves shut so quick. Nice power band though.

T~

[dwg86]

You can also try Racer Brown. I talked with Jim on the phone. Great guy. I was only buying a set of Stanadyne lifters from him, but he talked for at least 20 mins. He said he could grind a Jeep 6 cam. his web site and phone number...http://www.4secondsflat.com/RB%20Cam%20Specs.htm

Hughes engines also grindes Chrysler "real" cams for the .904 dia. lifter. They also can grind a Jeep 6 cam. http://www.hughesengines.com/TechArticl ... lercam.php

I think Reed cams went out of business. Thier web site is down and phones have been disconnected.

I bought an Engle cam. 213 dur @ .050, 501 lift, 112 lobe centers, for my stroker. I still haven't installed my engine yet, so I don't know how it will perform, or last.

I bought a 97 dakota for my son, he will be 16 in Oct. As soon as I get it on the road, I am going to swap my Jeep engine out. That way I will have something to drive while my Jeep is down.

My personal opinion is stay away from mass produced cams from the "big" companies. I have a Reed cam in my 401 that was broken in without ZDDP, I didn't know about that at the time, and it is running great.

[SilverXJ]

You can also try Racer Brown. I talked with Jim on the phone. Great guy. I was only buying a set of Stanadyne lifters from him, but he talked for at least 20 mins. He said he could grind a Jeep 6 cam. his web site and phone number...http://www.4secondsflat.com/RB%20Cam%20Specs.htm

Hughes engines also grindes Chrysler "real" cams for the .904 dia. lifter. They also can grind a Jeep 6 cam. http://www.hughesengines.com/TechArticl ... lercam.php

So many options.. this is why I went with a Comp Cam to begin with... and the fact that I used them in the past with good results...

When you say real cams, are you talking about the wider lobes?

[dwg86]

Hughes engines calls thier cams "real Chrysler cams". From what I've read on thier web site, the cams are designed to use a fast ramp that can only be used on the larger .904 lifters. The smaller diameter lifters, like sbc, can't use a fast opening ramp. The Hughes cam specs look like the same specs as Engle.

[Flash]

You can also try Racer Brown. I talked with Jim on the phone. Great guy. I was only buying a set of Stanadyne lifters from him, but he talked for at least 20 mins. He said he could grind a Jeep 6 cam. his web site and phone number...http://www.4secondsflat.com/RB%20Cam%20Specs.htm

When I buy my next cam, i will do some investigation with Racer Brown. Every net site i have ever been on and the the word "Racer Brown" comes up, It's alway good.......Inexpencive was never one of the word used. But if your after a "custom" grind, it never will be

[SilverXJ]

I recieved a reply from Engle Cams today. This is what they recommend:

EP-22HYD .512" lift 274' duration 230' dur @ .050" 110' lobe centers Power band 1800-5800 RPM $232

I'm no expert on reading a cam so I run them through Desktop Dyno. While I feel it doesn't give a good absolute hp and tq measurement it makes for a good comparison.

That showed a significant drop in torque and HP until 4000, where most of the cams I am looking at crossed. After that the torque and HP rose significantly above the others. Don't think that is a cam I want.

[dwg86]

230 dur @ .050 is not a torque cam. That is a fairly big cam. The cam in my 401 has 228 @ .050, 110 lobe centers. At idle it will shake the filling out of you teeth.
I would run a 52hyd (209 @ .050 /489 lift) or a 54hyd (214 @ .050 /501 lift) Or a combination of both (52hyd on the intake and a 54hyd on the exhaust) with 112 lobe centers. If you go to Engles web site,look under the cam specs for the amc v8.

[SilverXJ]

Hughes Cams won't do an L6 cam

I've been playing around some numbers and came up with this:

intake lift: .465
exhaust lift: .480
adv duration: 250 intake, 264 exhaust
duration at .050": 205 intake, 214 exhaust
Intake centerline: 110
Exhaust centerline: 114
lobe center: 112

Seat timing:
Open Close
Int 15 55
ex 66 18

.050 timing:
open close
int -7.5 32.5
ex 41 -7

Thoughts on that?

[gradon]

The numbers look good and your power oughta start alot earlier than the cams you previously posted.

[SilverXJ]

I took the numbers that Isky gave me for a custom and played with them a bit. Looked at the comp cam and determined that I didn't like the rate, so I reduced that and increased it a bit from the Isky. Increased the lobe center angle for better idle. According to Desktop Dyno, it will have a bit less lowend torque than teh Comp cam, but more HP and torque after 3500.. in theory anyhow.

[SilverXJ]

Talked to Jim @ Racer Brown today. He suggested a cam with .460" lift, 210* @.050 duration and 110* LSA. He said that would perform well and have a fair idle. He also suggested a cam with .450" lift, 206* @.050" duration and 110* LSA which would have better idle quality, a bit less top end and faster ramp rates.. which would make a noisier valve train.

Now I just don't know... my head hurts..

[gradon]

What Jim recommended is basically what the mopar 30ab is, except the lsa is 108*, which works fine on my obd2--I like the slight lope. The isky that sean is using, the 133125/26 is similar as well, so talk to him about his impressions(he hasn't been saying much lately).

[SilverXJ]

Which one of Jim's are you talking about? The first, larger one?

I did get in touch with Sean and he had this to say:

Offline and midrange torque are good, although I dont think it pulls too hard over 4k, but thats not where I spend most my driving so I think it suits me. I used the 133125/26 because it was dual pattern with larger exhaust lifts which helps offset smaller exhaust ports on the head. My head isnt ported but if it was I think it would wake things up more.

The custom cam the Isky recommended seems a bit better...

Jim was adamant about not going with a dual pattern.

[gradon]

The 2nd one w/ .45" lift is similar to the mopar. The isky 133125 looks like a good option. The custom isky above looks like it starts later than you should want and you wouldn't use the upper part of the range(better to have it down 500rpm). I haven't seen the lunati options yet.
edit: Man the lunati looks like a wicked cam:
* Advertised Duration (Int/Exh): 256/262
* Duration @ .050 (Int/Exh): 213/220
* Gross Valve Lift (Int/Exh): .484/.507
* LSA/ICL: 112/108
* Valve Lash (Int/Exh): Hyd/Hyd
* RPM Range: 1300-5400
* Includes: Cam Only

The 96+ jeeps came with dual pattern cams, so what's the big no-no about them?