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Author Topic: 292 509 mopar purple cam  (Read 11490 times)

Offline kars440

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292 509 mopar purple cam
« on: February 23, 2008 - 02:04:02 AM »
Boy did i ever screw up after reading views on 292 mopar cam, i thought it was a good cam so i bought one but now i think i made a bad choice. i'm sort of lost now, i should have join you guys sooner, oh well  :clueless: live and learn. Anyway anyone need a cam? think i'm going to rethink  :clueless: this cam selection out. Heres what i'm building 74 challenger 3.55 gears or is it 3.54, :clueless:   727 auto,   440 .030 over, eddie rpm intake, eddie heads, carb  :clueless: compression 10:1 to 11:1 not sure, hedders for sure.                                                                                                                                                          I will be doing town cruising also a lot of highway driving so any advice on cam choice.I like a radical idle but has to be very quick off the line. I,m going to be 52 yrs old this spring, so i don't no how much power i can handle,I guess there's always (DEPENDS) I'll have extras for the wife. :roflsmiley:. Noise not an issue anymore my hearing going, i'm hoping for a 11 to 12 sec car. Any advice would be very helpful thanks Karsten        :feedback:                                                     

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292 509 mopar purple cam
« on: February 23, 2008 - 02:04:02 AM »



Offline Chryco Psycho

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Re: 292 509 mopar purple cam
« Reply #1 on: February 23, 2008 - 04:17:53 AM »
unfortunatly you cannot have both , the rougher the idle the worse the low end response will be
 I would be looking at a K58 Engle grind or similar Lunati VooDoo , far better design

Offline dodge freak 2

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Re: 292 509 mopar purple cam
« Reply #2 on: February 23, 2008 - 09:11:21 AM »
But with your auto trans, all you need is a high stall converter. Then when you floor it from a stop, the engine will rev. right to the stall speed.

Thats how drag races can run a much larger cam than what you have.

BTW..you gas mileage will be very low, 7 mpg, so keep that in mind.

A 3000 stall converter works good on the street, be sure to use a trans cooler too-not the rad. one.

With a big cam your power brakes will not have enough vacuum, but theres ways around that.-Switch to manual brakes or get a vacuum cantiser or even an electrical vacuum pump.

Offline CrazyPete

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Re: 292 509 mopar purple cam
« Reply #3 on: February 23, 2008 - 11:55:42 AM »
you cam choice isnt ideal but its very common choice most of us have had at one time or another owned one of those 509 purple shafts its just an old design.  If you go to just about any car show or cruise night your gonna find someone with a big block there that has the same cam.  It's just today their are so much better choices to be made.  I'm still rockin the 509 purple shaft cam in mine 15 years later but yes if your doing a build id change that cam.

1970 Dodge Challenger T/A      http://heartlandmopars.com
1970 Plymouth Barracuda Gran Coupe
1976 Dodge Dart Sport
"Is that an oil leak?  No it's just sweat from all that HORSEPOWER"

Offline dodge freak 2

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Re: 292 509 mopar purple cam
« Reply #4 on: February 23, 2008 - 02:37:56 PM »
One thing about those "lazy" cams is that they last a longer amount of time. Most of these older cars today are only driven on weekends and for short trips but for a daily driver that sees 15,000-20,000 miles a year, some of these high lift, short duration cams just would wear out too soon.

Its a good idea to run a zinc additive or a racing oil high in zinc with a flat tappet cam . These off the shelf oils today are low in zinc but with a roller cam, the motor still will last.

Offline kars440

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Re: 292 509 mopar purple cam
« Reply #5 on: February 23, 2008 - 02:48:07 PM »
Thanks you guys for your input, Chryco i,m leaning towards your advice on k58 Engle cam, would you go for more lift cause the eddie heads can handle .600, just a thought.  Thanks again  Karsten

Offline moparmaniac59

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Re: 292 509 mopar purple cam
« Reply #6 on: February 23, 2008 - 03:04:12 PM »
Hey Kars,
You might want to consider your compression ratio too. If you run an 11:1 compression ratio, you most likely won't be able to get by on pump gas, but will need racing fuel (like 100 octane). I'd stick with 10:1 and run on pump gas. I think I've heard some guys mention being able to go with high octane at 11:1, but I'd be sorely afraid I'd get idle ping and crack a piston or two as my friend did with his 11:1 race motor (running it on the street) which he had a lot of money tied into. I personally would not take the risk with my money and sweat!! :eek7:

                                                   Matt B.
Matt

Offline kars440

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Re: 292 509 mopar purple cam
« Reply #7 on: February 23, 2008 - 08:36:54 PM »
Thanks for the info Matt, i read with aluminum heads you can go with 1 compression point higher 11= 10. Not sure bout all this techical stuff , maybe i'll go with a bored out slant six, NOT.                                                                                      Thanks Karsten

nivvy

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Re: 292 509 mopar purple cam
« Reply #8 on: February 24, 2008 - 12:43:44 AM »
I really like the mopar .528 cam........... lower duration with better lift than the .509 .......... add 1.6 rockers and get .561 lift.........   :thumbsup:

Offline Chryco Psycho

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Re: 292 509 mopar purple cam
« Reply #9 on: February 24, 2008 - 02:56:29 AM »
you can easily run 10.5- 10.7 with Alum heads on Pump gas
 no need to beat the valve train excessively , the K58 or even K60 will be fine if you want to use a hyd cam , if you are willing to go solid it opens up a lot of other good choices , the .528 Mopar with 1.6 rockers works great , I use this often But you have to remove valve lash from the lift so the .561 spec is .531 at the valve

nivvy

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Re: 292 509 mopar purple cam
« Reply #10 on: February 24, 2008 - 10:35:55 AM »
you can easily run 10.5- 10.7 with Alum heads on Pump gas
 no need to beat the valve train excessively , the K58 or even K60 will be fine if you want to use a hyd cam , if you are willing to go solid it opens up a lot of other good choices , the .528 Mopar with 1.6 rockers works great , I use this often But you have to remove valve lash from the lift so the .561 spec is .531 at the valve

thats a good point CP..... that messed with my brain for awhile on "gross" lift as my lobe lift is .389 * 1.7rockers is .661 "gross" lift minus .018 lash is a "net" actual lift of .643  :bigsmile:

not bad for a solid roller for the street  :2thumbs:

Offline Chryco Psycho

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Re: 292 509 mopar purple cam
« Reply #11 on: February 24, 2008 - 01:24:54 PM »
very nice as long as the heads will lfow there !!

Offline 74 340 4speed

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Re: 292 509 mopar purple cam
« Reply #12 on: February 25, 2008 - 02:14:31 AM »
I have that cam in my 340.  I love it, but its not an auto, and it doesn't have 3.55s :bigsmile:  If you keep that cam, a 3500 stall and 3.91s would be a good choice. 

Since you are considering a different cam, I think a cam on a 110 or 112 LSA in the mid 230 duration range would work better for you.  Should put you in the 2300-6000 rpm range.  With a 3,000 converter, this would be a very good combination.

Crower PN # 32243  228/236 duration @ .050" .478"/.502" lift, on a 112 LSA
They state that the power range is from 2,000-6,000 with a redline of 6500

Lunati 33702  228/235 @ .050" .465"/.465" lift on a 110 LSA
They state that the power range is from 2,400-5,800

hope this helps.
Andy
1967 Camaro SS: 406 sbc 505 hp/506 ft lbs|4 speed|Posi|3.73s
1969 C/10  350|Turbo 350
1969 Dodge D300 318|4 speed|Dana|4.88s
1972Nova: 350|Turbo 350
1974 'Cuda: 340|4 speed|Dana 60|4.10s|posi
1999 Camaro SS: Auto|Longtube Headers|True Duals|TT2s
2013 Challenger R/T: 6 speed|Hurst with pistol grip|mopar performance exhaust|super track pak

nivvy

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Re: 292 509 mopar purple cam
« Reply #13 on: February 25, 2008 - 02:34:18 AM »
cP my head flow about 330 cfm at .700 so im ok...........  ;)

« Last Edit: February 25, 2008 - 02:46:10 AM by StRoKer »

Offline moper

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Re: 292 509 mopar purple cam
« Reply #14 on: February 26, 2008 - 01:49:29 PM »
With what you have, I would simply swap the MP 292/509 with a Comp Cams Magnum 292. It's the same rough specs, but much more street friendly. Including tight (low stall) convertors and gearing. A couple of notes, a 12 second Ebody needs about 400hp. To run 11s, you'll need a bit closer to 500. Torque gets a car with 3.55s moving, and you better have the tires and suspension to stick them. You have no idea what the compression is. You used pistons taht were rated for "10:1", correct? That means if they are typical, you really have about 9.4:1. If you want that snap, you need to do a little mroe homework to see where you need to make up. A simple check, take a compression reading from every hole, with the engine hot, and all the plugs out. If it's under 130 with the MP.509, you dont have 10:1, or the cam is ground retarded (standard Operating procedure for MP stuff... poor execution, good theory... A cam swap will make you happier, but bigger is not the answer. Better is. Also, on valve springs and what you "can run"... some .550 lift cams need hevier springs than what Edelbrocks come with. The more modern the grind, the more spring it needs, and the more likely you'll be removing the original Eddy ones if you bother to look. What you have will work with the Comp 292.

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Re: 292 509 mopar purple cam
« Reply #14 on: February 26, 2008 - 01:49:29 PM »