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another cam question ?? #656205
03/30/10 07:51 PM
03/30/10 07:51 PM
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connecticut
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69charger R/T Offline OP
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I was going to get the lunati 60303 cam for my 440 but,I'm running stock 906 heads and I'm worried about the retainer to valve guide clearance. The lift on the exhaust is .513, so I was thinking maybe I should get another cam.I was looking at some comp XE cams that may be close to the lunati cam. I've heard good reviews on the lunati 60303 so I want to get a cam that's close to the lunati but with less lift. These are the cams I was looking at.

comp XE268H .224*int/.230*ex dur. .477int/.480ex
comp XE274H .230*int/.236*ex .488int/.491ex
lunati 60303 .226*int/.234*ex .494int/.513ex

witch cam do you think is the closes to the lunati and would perform about the same.

Re: another cam question ?? [Re: 69charger R/T] #656206
03/30/10 07:55 PM
03/30/10 07:55 PM
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Dougsmopars Offline
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The 60304 513/533 will run fine in 906 heads. I run that cam in mine. Super nice cam. Great street maners and makes a ton of power.

Re: another cam question ?? [Re: Dougsmopars] #656207
03/30/10 08:41 PM
03/30/10 08:41 PM
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connecticut
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69charger R/T Offline OP
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Quote:

The 60304 513/533 will run fine in 906 heads. I run that cam in mine. Super nice cam. Great street maners and makes a ton of power.




My heads are "stock" I don't want to pull the heads and have the valve guides trimmed. From what I've been told max lift on stock heads is .510,and that is close.

Re: another cam question ?? [Re: 69charger R/T] #656208
03/30/10 09:25 PM
03/30/10 09:25 PM
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Dougsmopars Offline
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My heads are stock. Don't know what to tell you?

Re: another cam question ?? [Re: Dougsmopars] #656209
03/30/10 09:55 PM
03/30/10 09:55 PM
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Salinas, CA USA!
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Quote:

My heads are stock. Don't know what to tell you?




"Just Do it"


1968 Dodge Charger
Re: another cam question ?? [Re: 69charger R/T] #656210
03/31/10 07:18 PM
03/31/10 07:18 PM
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connecticut
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From what I've been told you can't run a .513/.533 lift cam on stock heads with out trimming the valve guides,the retainers will hit the guides ?? Is this true ?? Does anyone have any opinions on the comp cams I listed ?? Has anyone run them,how do they perform,idle ??

Re: another cam question ?? [Re: 69charger R/T] #656211
03/31/10 07:20 PM
03/31/10 07:20 PM
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Dougsmopars Offline
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I run the Lunarti 513/533 with stock heads. I have no issues with anything hitting. Car runs super strong.

Re: another cam question ?? [Re: 69charger R/T] #656212
03/31/10 07:25 PM
03/31/10 07:25 PM
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Junky Offline
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Quote:

From what I've been told you can't run a .513/.533 lift cam on stock heads with out trimming the valve guides,the retainers will hit the guides ?? Is this true ?? Does anyone have any opinions on the comp cams I listed ?? Has anyone run them,how do they perform,idle ??



Hughes Engines has a Whiplash cam with .519 lift. They say it will run with stock heads, no work on the heads needed. But the valve springs are another thing...


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Re: another cam question ?? [Re: Dougsmopars] #656213
03/31/10 07:36 PM
03/31/10 07:36 PM
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connecticut
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69charger R/T Offline OP
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Quote:

I run the Lunarti 513/533 with stock heads. I have no issues with anything hitting. Car runs super strong.




Well now I'm confused,everyone I asked said .510 lift was the max you could run on stock heads with out trimming the guides. I like the lunati cam thats the one I want to run. I guess I'll have to pull the valve cover check the valve guide to retainer clearance to be sure ?? Is rhode Island where your from, how are you doing after all this rain !!

Re: another cam question ?? [Re: Junky] #656214
03/31/10 07:36 PM
03/31/10 07:36 PM
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Dougsmopars Offline
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You can run 600 lift in a 906 head. It wouldn't flow enough for that much lift with out a lot of porting. Here is an article from Hot Rod. Muscle Motors is doing a CNC machine port job on 906 heads good for 600 Horse and 600 lift. No cutting anything for lift clearence. There porting and reworking the combustion chambers. "The net result is a set of factory appearing 906 heads, with well above factory performance, all at a reasonable price. After porting, the 906 heads flow an impressive 313.1 cfm on the intake side and 223.5 cfm on the exhaust side at .600-inch lift. Using the rule of thumb that cylinder heads have the potential to support horsepower double their intake flow, these heads are capable of 600 hp or more when used on a well-built engine. That kind of potential certainly makes the Muscle Motors CNC ported 906 a viable competitor when compared to other heads in the same price range, and gives enthusiasts a good product while retaining a stock appearance"

Re: another cam question ?? [Re: 69charger R/T] #656215
03/31/10 09:36 PM
03/31/10 09:36 PM
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Las Vegas
JeffC Offline
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I think the arbitrary .510 limit is where the stock valve springs coil bind. With good springs apparently you can go with more lift.

Re: another cam question ?? [Re: JeffC] #656216
03/31/10 09:47 PM
03/31/10 09:47 PM
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Dougsmopars Offline
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Yup. all you need is the springs rated for the cam you choose. Plenty of guys running bigger cams then 513/533 with only ported 906 heads. Just get the matching springs and put her in.

Re: another cam question ?? [Re: 69charger R/T] #656217
03/31/10 09:50 PM
03/31/10 09:50 PM
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pana illinois
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bigblock4x4 Offline
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Quote:

Quote:

I run the Lunarti 513/533 with stock heads. I have no issues with anything hitting. Car runs super strong.




Well now I'm confused,everyone I asked said .510 lift was the max you could run on stock heads with out trimming the guides. I like the lunati cam thats the one I want to run. I guess I'll have to pull the valve cover check the valve guide to retainer clearance to be sure ?? Is rhode Island where your from, how are you doing after all this rain !!


i also use that cam with no mods,it does perform flawlessly

Re: another cam question ?? [Re: bigblock4x4] #656218
03/31/10 11:41 PM
03/31/10 11:41 PM
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Redding,CA USA
440charger500 Offline
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Get some adjustable rockers and the correct springs for the cam and you'll be smokin tires. Your not going to have a problem with 906 heads.

Re: another cam question ?? [Re: Dougsmopars] #656219
04/01/10 09:36 AM
04/01/10 09:36 AM
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NE Oklahoma
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Von Offline
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Quote:

the 906 heads flow an impressive 313.1 cfm on the intake side and 223.5 cfm on the exhaust side at .600-inch lift. "





Inserting a big grain of salt next to these claims......


72 RR, Pump gas 440, 452s, 3800 lbs, Corked, ET Radials,. 11.33@117.72. Same car, bone stock 346s, 9.5 comp, baby solid. 12.24@110.
Re: another cam question ?? [Re: Dougsmopars] #656220
04/01/10 10:10 AM
04/01/10 10:10 AM
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SE Kansas
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indytex96 Offline
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Are you running it with a stock converter? I am concidering a cam upgrade also.

Re: another cam question ?? [Re: Dougsmopars] #656221
04/01/10 04:09 PM
04/01/10 04:09 PM
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Bellaire, Ohio
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66cornet Offline
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Quote:

The 60304 513/533 will run fine in 906 heads. I run that cam in mine. Super nice cam. Great street maners and makes a ton of power.




I just wiped the #8 intake lobe of my MP509 cam. The lifter looks as if it stuck a little, rotated, stuck again rotated and then stuck for good. Lifter looks like it was put on a grinder.

I'm looking at the Lunati cam also. Are you running adjustable rockers or the non-adj type?

My 440 .030, 10:1cr, eagle crank, eagle rods, hyperutectic pistons, eddy heads, eddy 2x4 w/2 600s on it. I'm wondering if I'm being to radical with the 60304 cam? I probably won't be at the track, mostly street driving.
Any ideas/suggestions?

5901411-100_1699.jpg (24 downloads)
Re: another cam question ?? [Re: 66cornet] #656222
04/01/10 04:33 PM
04/01/10 04:33 PM
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Dougsmopars Offline
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i run mine with stock mopar rockers. Non adjustable

Re: another cam question ?? [Re: indytex96] #656223
04/01/10 04:36 PM
04/01/10 04:36 PM
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Dougsmopars Offline
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I'm useing a Mancini 2800 to 3200 stall. Cam likes it.

Re: another cam question ?? [Re: Dougsmopars] #656224
04/01/10 04:53 PM
04/01/10 04:53 PM
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Bellaire, Ohio
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66cornet Offline
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Quote:

i run mine with stock mopar rockers. Non adjustable




Dougsmopars, thanks for the info. I just want to be able to drive to California if I want to. However, I want some grunt and good sounding Mopar engine.

I am leaning towards the Lunati cam. I will have to change my sprocket to a three holer, but no problem there. May as well do it up right.

Again, thanks for the info..

Re: another cam question ?? [Re: Dougsmopars] #656225
04/01/10 07:19 PM
04/01/10 07:19 PM
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connecticut
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69charger R/T Offline OP
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Quote:

You can run 600 lift in a 906 head. It wouldn't flow enough for that much lift with out a lot of porting. Here is an article from Hot Rod. Muscle Motors is doing a CNC machine port job on 906 heads good for 600 Horse and 600 lift. No cutting anything for lift clearence. There porting and reworking the combustion chambers. "The net result is a set of factory appearing 906 heads, with well above factory performance, all at a reasonable price. After porting, the 906 heads flow an impressive 313.1 cfm on the intake side and 223.5 cfm on the exhaust side at .600-inch lift. Using the rule of thumb that cylinder heads have the potential to support horsepower double their intake flow, these heads are capable of 600 hp or more when used on a well-built engine. That kind of potential certainly makes the Muscle Motors CNC ported 906 a viable competitor when compared to other heads in the same price range, and gives enthusiasts a good product while retaining a stock appearance"




which hot rod mag. was this article in I may have it,would like to read it.

Re: another cam question ?? [Re: 66cornet] #656226
04/01/10 07:24 PM
04/01/10 07:24 PM
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Dougsmopars Offline
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I would not think twice about taking my car on a 3000 mile run across country. Cam is very street freindly. Allthough my 440 isn't all that fuel freindly. lol

Re: another cam question ?? [Re: 69charger R/T] #656227
04/01/10 07:30 PM
04/01/10 07:30 PM
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Dougsmopars Offline
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Re: another cam question ?? [Re: Dougsmopars] #656228
04/01/10 08:32 PM
04/01/10 08:32 PM
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Columbia, CT
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I wouldn't run .600 lift, because the springs they require will not allow the factory seals or fit in the factory spring seat... The guides get cut down and narrower to fit the positive seals, and the spring seats get the centers cut out to run the dual spring. As far as what fits... with a spring change I've run .520 with no issues on stock pistons. But more than that, especially with a fast rate (more duration earlier in the lift cycle) I think you're pushing it in a '69-'71 shortblock. All others probably have plenty of room.


Well, art is art, isn't it? Still, on the other hand, water is water! And east is east and west is west and if you take cranberries and stew them like applesauce they taste much more like prunes than rhubarb does. Now, uh... Now you tell me what you know.
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