Re: Advantages of the MP 484 and 509 cams ?
[Re: Kern Dog]
#1042963
07/30/11 10:51 AM
07/30/11 10:51 AM
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Joined: Oct 2003
Posts: 7,506 Az
Crizila
master
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master
Joined: Oct 2003
Posts: 7,506
Az
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Old grinds. I think the newer cams make better use of the 904 lifters.
Fastest 300
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Re: Advantages of the MP 484 and 509 cams ?
[Re: Thumperdart]
#1042966
07/30/11 01:17 PM
07/30/11 01:17 PM
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Joined: Jan 2005
Posts: 12,422 Kalispell Mt.
HotRodDave
I Live Here
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I Live Here
Joined: Jan 2005
Posts: 12,422
Kalispell Mt.
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The old mopar cams sell so well because they work OK and they say mopar on the box. The newer desighn cams work better and are cheaper but people think for some reason that useing a comp or lunati is like putting a chevy cam in their mopar when really it is quite the oposite, the old mopar cams are lobes stolen from chevy desighned cams that have to use the smaller lifter diameter witch limits how much lift you can get in a given duration, comp cams has mopar specific cams in witch the lobes would not work with a chevy lifter. The faster higher opening means less duration and that generally means more tq while the higher lift generally translates into more HP, sort of the same reasons roller cams are advantageous and as a matter of fact on very short duration cams a big mopar diameter flat tappet lifter can get the valve open higher and faster than a roller.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: Advantages of the MP 484 and 509 cams ?
[Re: shoebox]
#1042968
07/30/11 03:19 PM
07/30/11 03:19 PM
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Joined: Jan 2003
Posts: 27,421 Balt. Md
383man
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,421
Balt. Md
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Actually these MP cams were designed in the 60's and 70's and really have nothing to do with saving money. They were made for Mopar by Racer Brown originally and they were part of a package that Mopar would put out for the street cars and bracket racers for use in building good performance package. They would recommend the eng parts to use for stuff like a 12 second and 11 second build and so on. So Mopar had these cams ground to work for budget street racers and bracket racers. You could buy the cams themselfs and use them how ever you liked. But if you looked in the MP books they would have different builds in the books for big and small blocks and anywhere from 14 second to 10 second builds. And they all used one of the MP cams. I believed they felt it really helped the average hot rodder in helping them select a cam for their Mopar build. Yes they are good cams and were some of the best back when they were put out. Today there are better cams but there is still nothing wrong with the MP cams if they fit your build. I guess what I am trying to say is back when they were put out there was not alot of cams to use and these were good selection that Mopar recommended. But today there are alot more cams out there and alot more eng builders to help hot rodders select a cam for their build. Bottom line is that yes the MP cams work fine and yes there are better cams to choose from nowadays so it is up to you or your eng builder to choose a cam. Nothing wrong choosing one of the Mopar cams if you feel like it fits your bill but you have many more modern cams to choose from now. I myself like to use some of the MP cams in my budget builds as they work fine in the right combo. I used the .484 cam in a very mild 383 Dart and I really liked it. It ran 12.30's with 3.91's and was just a basic stock 383 with 9.5 comp and the normal bolt on's........headers , Eddy intake , Holley carb and MP ign. I also used the .557 cam in my old 440 that was in my 63 and it was a mild 440 that ran a best of 11.49 @ 116. I would suggest that if you dont know alot about cams talk with your eng builder or one of the reputable shops in your area about choosing the right cam for your combo. Ron
Last edited by 383man; 07/30/11 03:22 PM.
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Re: Advantages of the MP 484 and 509 cams ?
[Re: d-150]
#1042973
07/31/11 11:48 AM
07/31/11 11:48 AM
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Joined: Oct 2007
Posts: 4,210 New York
polyspheric
master
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master
Joined: Oct 2007
Posts: 4,210
New York
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"not as lopey but much better low end" compares any 2 cams...
Boffin Emeritus
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