440 source stroker with mopar purple cam

[68charger440]

Hello, I have a 440 stroked to 500" using 440 source stroker kit.  I have stock 906 heads.  Can I put a Mopar Purple cam or something similar in there without machining the heads or changing the rocker arms.  Also, is it a must to change the valve springs in that setup.  The car will mostly be a street car with a trip to the track once in a while for fun.

[tatrick2me]

You can run any cam you want. But if I was you I'd call the folks at Mancini racing for advice.

[Rolling_Thunder]

it is always a good idea to go with the recommended valve springs for whatever cam you go with...         what were you looking for ?  power brakes ? good idle ? lopey idle ?   what's the rest of the combo ?

[68charger440]

it is always a good idea to go with the recommended valve springs for whatever cam you go with...         what were you looking for ?  power brakes ? good idle ? lopey idle ?   what's the rest of the combo ?

I want the lopey idle mostly because I love the sound as much as the performance. I'm not a serious racer.  It's got a 727 with a shift kit.  Stock converter, but I will eventually go with a 2500 stall in a year or two.  Edelbrock performer RPM intake and Holley 870 street avenger carb.  Mallory Hyfire ignition, and HEI distributor. 3:91 sure grip.

[FLG]

Lope does not equal performance. Put too big of a cam and a guy on a bycycle can take you off the line. Best bet is to either wait until the more experienced guys chime in or call voodoo or engle and tell them what you have and they can recommend a cam based on your combo. Everything in the driveline needs to be matched to coencide with the power band of the engine. You can have a 500hp engine but with the wrong stall and gearing it can fall flat on its face.

[1Bad70Charger]

Those old purple cams are outdated and the new modern grinds are 100% better for performance. You have a BIG ENGINE (modern stroker), and why hold down it maxium potential with an old school grind.

Call Engle as FLG suggests, and they will recommond one of their nice size flat tappet hyd. cams for you for ultimate performance, sound, etc., that is compatible with  your exisiting valvetrain.

Also, the right Comp Cams and Lunati Voodo Cam will be 100% better than the old fashion lobes on the purple cam that was popular 40 years ago.  New modern flat tappet hyd cams, with new retainers, locks, push rods, and valve springs are inexpensive.   I recall Firefighter, Ron, the resident cam (and overall performance guru here), previously telling me that you can go up to .510 lift and still use your stock oem 440 rocker arms on stock heads.  

As a matter of fact, here is EXACTLY what Ron (Firefighter) was recommonding for me when I was planing on using my stock heads for a 440 build, and as you can see he said this cam would work good for a 500 inch engine also:  


Here's what i would use....and it will work fine when you decide to build a stroker. The stock throttle and kickdown linkage also works with the SD.  

http://www.summitracing.com/parts/HLY-300-14/


The Comp XE284 hydraulic is 240/246 on a 110* LSA with .507/.510 valve lift

http://www.summitracing.com/parts/CCA-CL21-225-4/

Matching #911 valvesprings

http://www.summitracing.com/parts/CCA-911-16/

[Rolling_Thunder]

yep - go with a modern grind....     I love Engle cams myself...    their old school designs seemed to work well with my past engine builds.

my personal choice would be an Engle K60 / K62 on a 110*LSA

Overall specs would be 288*/291*    238*/244* @ .050"   .534"/.539"     110* LSA

Again, personal choice here - I'm sure Ron would suggest something as well when he finds this thread    

PS - your cylinder heads will be the great limiter in this combo

[1Bad70Charger]

yep - go with a modern grind....     I love Engle cams myself...    their old school designs seemed to work well with my past engine builds.

my personal choice would be an Engle K60 / K62 on a 110*LSA

Overall specs would be 288*/291*    238*/244* @ .050"   .534"/.539"     110* LSA

Again, personal choice here - I'm sure Ron would suggest something as well when he finds this thread    

PS - your cylinder heads will be the great limiter in this combo

Yes, that is a great cam for the OP's 500 ci engine, but  isn't the oem rocker arms on the stock heads limited to .510 lift at .050?   Ron (Firefighter), previously told me this.

[68charger440]

yep - go with a modern grind....     I love Engle cams myself...    their old school designs seemed to work well with my past engine builds.

my personal choice would be an Engle K60 / K62 on a 110*LSA

Overall specs would be 288*/291*    238*/244* @ .050"   .534"/.539"     110* LSA

Again, personal choice here - I'm sure Ron would suggest something as well when he finds this thread    
Thanks to all for your input.  I just got back home after spending the week up in the hills here in Colorado.  I don't have internet at my cabin so I just got to see all of the input.  I guess I will scrap the Mopar Purple thought, and go with a modern grind.  Thanks again to all!
PS - your cylinder heads will be the great limiter in this combo

Yes, that is a great cam for the OP's 500 ci engine, but  isn't the oem rocker arms on the stock heads limited to .510 lift at .050?   Ron (Firefighter), previously told me this.

[Belgium R/T -68]

I'm running a Engle K60 with 112° LSA in my 500" stroker after following Rons suggestion, never felt a stronger engine.
I do have eddyheads but still think I should upgrade to adjustable rockers, feels a little bit riscy to stress the stock rockers.

Per

[Nacho-RT74]

guys, have you checked MP released new cam grinds ?

http://www.dodgecharger.com/forum/index.php/topic,82695.0.html

( well thinking... are they actually Mopar ? LOL )

[1Bad70Charger]

I'm running a Engle K60 with 112° LSA in my 500" stroker after following Rons suggestion, never felt a stronger engine.
I do have eddyheads but still think I should upgrade to adjustable rockers, feels a little bit riscy to stress the stock rockers.

Per

I agree, according to Ron (Firefighter) you can safely run up to only .510 lift with stock rocker arms that the OP references, and although that K60 is a great street cam, I think you are pushing things with stock rocker arms.

Maybe Ron can pipe in here about the .510 cam lift being the comfort zone at .050 for stock rocker arms (b/c you guys know he is has a wealth of knowledge on this stuff).  

[firefighter3931]

With unmodified stock heads (no valve guide trimming) you are limited to .510 valve lift. Anything more and you will encounter retainer to guide clearance 

That being said ; the XE284 is an excellent street cam for a mild street stroker 

Per ; no worries with the K60 and stock rocker system.....i wouldn't hesitate to run that combo in my own engine. 



Ron

[1Bad70Charger]

With unmodified stock heads (no valve guide trimming) you are limited to .510 valve lift. Anything more and you will encounter retainer to guide clearance 

That being said ; the XE284 is an excellent street cam for a mild street stroker 

Per ; no worries with the K60 and stock rocker system.....i wouldn't hesitate to run that combo in my own engine. 



Ron

The man has spoken, order the Engle K60 cam for your 500 ci engine! 

[firefighter3931]

With unmodified stock heads (no valve guide trimming) you are limited to .510 valve lift. Anything more and you will encounter retainer to guide clearance 

That being said ; the XE284 is an excellent street cam for a mild street stroker 

Per ; no worries with the K60 and stock rocker system.....i wouldn't hesitate to run that combo in my own engine. 



Ron

The man has spoken, order the Engle K60 cam for your 500 ci engine! 

That K60 will work with the stock heads and stock rocker system as long as the correct modifications are done to the factory heads (valve guides need to be shortened and aftermarket valve seals installed).

If using unmodified stock heads, the XE284H is what i would recommend.

* Of course, the correct valvesprings will need to be installed 


Just a clarification for the original poster 



Ron