Finally swapping cams

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MB43

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I'm finally getting around to changing the cam in my 360.

I'm looking at three different ones, lemme know what you think:

1. Comp XE284H - 284/296, 507/510 lift
2. Mopar 233 - 292/292, 509/509 lift
3. Lunati 60404 - 276/284, 513/533 lift

This is going in a 360 with 9.5:1 compression, X heads, 750HP, headers, etc, etc, etc. Full specs are here: http://www.burwoodboysracing.com/about_the_car.htm

It'll be replacing a Crane 454/480 lift cam. I'm looking to get from the car from the low 12s into the mid to high 11s.

Comments? Suggestions for a different cam?
 
Do you know what the duration at .050 is on 1 and 3 ? I know the .509 is rated at 248 but I have heard its been measured as big a 254.

The XE284 would probably work well. I know its in the 240s @ .050" but that Lunati Im not familiar with. It does sound interesting though.
 
I think that Lunati may be better for your car. Alittle less duration then the comp has so it will have more low end. If you had more gear the Comp may be faster.
 
AdamR said:
I think that Lunati may be better for your car. Alittle less duration then the comp has so it will have more low end. If you had more gear the Comp may be faster.
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Good thought there. I'm gonna pop both of these into DesktopDyno and see what the numbers look like.

Anybody else have an opinion?
 
Dont know about the Lunati, but I think at 9.5 cr you would get better results with the Comp Cam XE284 vs. the Mopar one. You may bleed off cylinder pressure more so with the MP unit. The Comp Cam unit is designed for better performance for the CR you will be running. When I built my stroker engine 5 years ago, I bought the 408 kit (9.7:1 pistons) from Muscle Motors. Mike Ware (MM) wasnt impressed with that same Mopar cam I was going to order from him, said their were better and recomended the XE284 to keep some cylinder pressure at our altitude here. It worked great. Last season I upgraded to one of their custom ground mechanical cams, the XE284 went into our new 360 powered street driven Duster as a hand down. My 360 build sounds very close to yours except I run J-heads, but same carb, intake ,9.5" converter 1 5/8 headers, 3.91 gears. Iam as happy with it in the 360 as in the 408, idles well, sounds awesome and pulls hard up through the entire rpm range.
 
408duster said:
My 360 build sounds very close to yours except I run J-heads, but same carb, intake ,9.5" converter 1 5/8 headers, 3.91 gears. Iam as happy with it in the 360 as in the 408, idles well, sounds awesome and pulls hard up through the entire rpm range.
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What does your car run?
 
My wife runs it in street class and isnt the most aggressive on the launch, and leaves it in Drive . We are at 4,000 ft elevation so not the best of air, she runs 14.10's with it. My buddy would run 13.6's with his 360 Dart Sport equipped with the same cam. When I put it in the 360 I was a little concerned it would be a tad too much for what we wanted it to do, but its real happy with the converter and gearing.
 
just wandering how much stall u got we built my sons 360 pretty much like yours except no roller rockers with 4'10 gears 3000 stall and the lunaticam in a heavy 87 d150 ran high 12's whats yours running now if you don't have a stall the lunaticam would be useless
 
mr.318 said:
just wandering how much stall u got we built my sons 360 pretty much like yours except no roller rockers with 4'10 gears 3000 stall and the lunaticam in a heavy 87 d150 ran high 12's whats yours running now if you don't have a stall the lunaticam would be useless
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I've got a 9.5" PTC converter that stalls at 3500-3800 RPM, and 3.91 gears. With the smaller cam (216/226 @ 050, 454/480 lift) it's gone a best of 12.21 @ 111 MPH.
 
We are at 4,000 ft elevation
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Yea, thats up in the air and then theres days where it will spec out higher.
I'm at sea level. Pressure is allways good. I think at max I'm 300 ft. in the air at the highest point on the Island.

Mike, how much lift can your X heads handle?
Did you look at a Comp Cams XE HI LIFT series cam?
 
Looking at the whole package...How confident your pistons are really at 9.5:1? How good are the X heads? Stock, or ported? Any flow numbers? I would lean towards either the Comp or the MP .509(just make sure the cam gets degreed properly...) IMO, the lunati might be a little small, where the MP might be a little too much for a "9.5" engine that really is 9:1 when it's measured and figured. The Comp will give you good cylinder pressure. 3.91s with a 29" tire isnt much gear. I think you'd go faster with a set of 4.30s in there and that same setup you have now. That being said, maybe the Lunati IS a good idea...lol.
 
mikelbeck said:
I'm finally getting around to changing the cam in my 360.

I'm looking at three different ones, lemme know what you think:

1. Comp XE284H - 284/296, 507/510 lift
2. Mopar 233 - 292/292, 509/509 lift
3. Lunati 60404 - 276/284, 513/533 lift

This is going in a 360 with 9.5:1 compression, X heads, 750HP, headers, etc, etc, etc. Full specs are here: http://www.burwoodboysracing.com/about_the_car.htm

It'll be replacing a Crane 454/480 lift cam. I'm looking to get from the car from the low 12s into the mid to high 11s.

Comments? Suggestions for a different cam?
Click to expand...
Rather than guess at something available from a catalogue - why not phone Jim at Racer Brown and at least get a recommendation from a cam "builder" or even from Bullet Cams.
Personally, I think you should go with something in the range of 242/246 @.050 range with 515/535 lift. M2CsW :salute:
 
First let me say those are impressive times Mike. And I'd hate to see you ruin the combo you obviously have working for you. But at the risk of urging you the wrong direction, I'd agree with Adam, and go for the Lunati grind. Seems like the proper pick for that compression. And you wouldn't have to ring it out so far. The '509 would not even enter into the duke out.
 
rumblefish360 said:
Yea, thats up in the air and then theres days where it will spec out higher.
I'm at sea level. Pressure is allways good. I think at max I'm 300 ft. in the air at the highest point on the Island.

Mike, how much lift can your X heads handle?
Did you look at a Comp Cams XE HI LIFT series cam?
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The guy who sold me the heads had this to say about them:

These springs were recommended by lunati for soild flat-tappets up to .640" lift at 1.650" installed height. I was going to run Mopar's .557" soild cam at first, but changed my mind. I opted for the hydraulic .509" and installed the springs at 1.690" instead of 1.650" to reduce spring pressure on seat and open in order to work with the hydraulic. I don't have spring pressure checking equipment. But, as you can see, I initially set up the springs .040" short of recommended height, so the springs weren't stressed in my application. They still have plenty life in them.
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I looked at the high lift cams, but those numbers kinda scared me. ;-)

The heads were milled quite a bit, they're down to 64cc chambers, with the pistons I have (that were 060 down in the hole, from what I remember) I figured the compression was just about 9.5:1. They're supposedly "experimantal super stock heads" that were ported by an old SS racer.

As for talking about a builder, I forgot I pinged Scott Brown a while back, he recommended a 237/242 on a 108 LSA with 525 lift.
 
As for talking about a builder, I forgot I pinged Scott Brown a while back, he recommended a 237/242 on a 108 LSA with 525 lift.
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Head flow balance is an issue I would have taken into the thought process before I made a judgement. Also the head milling and where the piston sits in the hole was an unknown to me. This complicates things.

Between the Comp duration and Scotts I would have landed and as much lift as the head can use. To the point of head flow stall. The actual amount in the split is hard to call. (Head flow dependent thing.) Also, your not driving this everyday right, so I'm with the 108 LSA. When it gets lower than that, it idles really freakin choppy and can be hard to tune in at idle.
 
So... the Scott Brown cam sounds like a good one? I looked back at the e-mail exchange, it was from a couple of years ago... Is he still doing cams?
 
I do believe so. I recently read someone just picking one up. I'm not a 100% on that. But it's worth a try.
 
Well, I wound up going for the Lunati. It showed up here over the weekend, the box was all beat up and the box inside that the lifters were in was destroyed. They were bouncing all over the place in there, I don't know if any are damaged or if it banged up against the cam but I called Jeg's and they said they'd send me a new one.

My wife was gone all week and I was supposed to be working on the car, but I can't swap the cam if I don't have the cam, so no work got done. :-(
 
No worries Mike. Better weather is coming.
 
I'm hoping... and still waiting for the replacement cam. :-(
 
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