MP purple shafts ?

[Rolling_Thunder]

Anyone had any problems with them - I recently did with MPP4120235    thats the 284*/284*   .484"/.484" Purpleshaft...    Max has had a problem with them as well so i am curious if anyone else has...   

[ChgrSteve67]

I just rebuilt my engine and installed a P4286677 Cam
1300-5700 RPM
Duration 272/272
Lift .455/.455
I have not had any problems, what problems are you experiencing?

[Rolling_Thunder]

Could not be timed...    timing mark is way off (by about 90*) --  when the timing was retarded to get it to TDC it would stall ---  would not run at all...       the only times ive heard of this is with the 284/284 cam.....       I just installed a different camshaft and will be starting her up tomarrow....         

[ChgrSteve67]

Make sure you plug the vacuum advance while timing the motor.
I had over 30 degrees in drift when I tried to time mine with the Vacuum advanced connected to the carb..
Ultimately my timed out at 36 degrees.

I also took my Charger to a tuner with a Chassis Dyno to get it dialed in.

[Rolling_Thunder]

The advance was plugged...     

[Spike]

Not a good cam choice if you want to have a good vacuum reading. I pulled the 484 MP cam out of my 440 and replaced it with a Scott Brown cam. Wish I would have done that in the first place.

[Runner]

are you saying that you tried to set the initial timing a tdc?      youll want your initial timing at around 16 degrees with that cam and total in the 35-38 range. i ran mine at 27 degrees intial and 40 total in my 484 camed 383.   

[694spdRT]

What is the problem again...I try to concentrate on your post but, that Avatar keeps distracting me. 

Any chance the balancer ring slipped or did you check that already? You posted about your engine having a noise coming off of acceleration right? Did you recently try to dial in the cam and find this problem or ? 

[Rolling_Thunder]

the balancer is good...   its just the timing had to be WAY up there...  for it to run       anyway just curious ----   swapped the cam out today so its no longer an issue

[694spdRT]

So did the noise go away too?

[Ghoste]

I have the same cam in my car and as much as I dread doing it, I am thinking about pulling it from my setup too.

[firefighter3931]

I have the same cam in my car and as much as I dread doing it, I am thinking about pulling it from my setup too.

Do it !   My vote is for the crower hdp271....you'll luv how that cam idles and pulls down low.   Tuning problems will disappear !  

Ron

[Ghoste]

How is it going to work with my intake and so on?  Isn't the milder cam going in the opposite direction from the rest?  (don't worry, you have me about 95% talked into it)

[firefighter3931]

How is it going to work with my intake and so on?   Isn't the milder cam going in the opposite direction from the rest?   (don't worry, you have me about 95% talked into it)

The SD makes excellent bottom end power so that's not the issue. Taking 20* (@ .050 lift) of duration out of the motor will really wake up the bottom end grunt. The 112* lsa will spread the power around and it will pull hard right to 6k. The idle vacuum will increase substantially and make tuning a joy. Best of all this grind will swap right in w/o any head mods or valvespring swaps. When your converter stalls, the engine will be in it's powerband...not 1000 rpm away.  

Ron

[Ghoste]

It's probably coming.   I have to get through Christmas first and then I'll get back on the Charger program.  
So, returning the thread to Rolling Thunder, have all your problems disappeared with the cam swap?

[Rolling_Thunder]

well it hasnt knocked yet so...   i can only assume that the knocking was the cam as well ----   screw MP

[Ghoste]

There sure is a lot of evidence piling up against buying cams from Mopar.  It's too bad, they better turn things around fast or they'll lose us on all their speed parts.   I know it's a very tiny part of their business, but it's still a contributor to the bottom line.

[Runner]

sounds to me like your tune up was more of a problem than the cam was.

[Ghoste]

Me or Rolling Thunder?  Cuz my tuneup sucks AND my cam is ill suited too.

[Rolling_Thunder]

sounds to me like your tune up was more of a problem than the cam was.

doesnt change the fact that the cam i had sucked == havent changed anything else and not it runs like a champ

[Runner]

well if you were trying to set the timing at tdc then the cam didnt suck, the tune up did!   ive ran a mp 484 cam and my little old 383 ran pretty damn hard with it (12.49@109mph)

[Runner]

Me or Rolling Thunder?   Cuz my tuneup sucks AND my cam is ill suited too.

        with you, the cam is just in the wrong combination of parts, and to be honest, that may very well be the case with rolling thunder as well.  

     now i know your a moparts member as well,      do you trust fast68?

    when i lost a lobe on my mp 484 cam and was planing to pull the motor apart and clean it up, i contacted dwayne about doing a cam change to something that would pick the performance up while still staying with a hydrolic cam. he told me to either go back to the 484 cam or to stick comps version of the 484 cam back in, when i questioned him about the possibility of going to a solid lifter cam, he told me if i was looking at going solid to DO IT and thats when he recomended the xe282s comp cam for me. i used it and i love it.   i guess my point is, dont blame the cam becasue it didnt have the right parts around it and was in the wrong aplication.

    383man ran the 484 cam in his sons dart, i believe it ran a 12.31@110 mph on street tires.  both his dart and my roadrunner were basically stock rebiuld 383 long blocks with headers, the 484 cam, intake with  gears and a good CONVERTER. 

  let me ask this,  how many stock headed 9.-1 383 chargers on this board are running 13.0 or better?.

 

        now the 383 that i have in my 68 satellite was intended to be a REAL driver, winter , summer, going on trips ext.   with 3.23 gears and a 2500 stall the 484 cam wasnt the right choice. i ended up going with a crane 272h grind.      thi car runs and drives like a dream. while its far from fast it runs 13.80s@102mph the way i drove it 110 miles ot the track, just pulled the cooler out and put it in the lanes.

    i doing another 383 for my wifes pink 72 satellite not sure yet what it will get, but im pretty sure it will be a comp that i buy from some dude in vermont.  


          you all have a merry christmas!!

[Ghoste]

I hardly ever go on Moparts so I'm not too familiar with him to be honest.  It seems like on this site I can ask the stupidest question and it gets patiently answered.  I tend to be one of those guys who asks questions that I sometimes already know the answer to but can't see the forest.  I think Ron and Neil especially both seem to know when I need to understand the mechanics of something and when I just need to reassure myself.  At least that's how I perceive it.
As to my car, I don't know.  I was careful in selecting components, or so I thought and still somehow there is a piece missing.  I'll get there but man...

[Rolling_Thunder]

ok - and when my boss cant tune the engine either what does that tell you ?    What set us was your 383 running ?  I thought this cam would be rather small but it proved to be not worth it...      My engine was to be a good reliable engine i can enjoy driving...    9.0:1 compression, ported and polished heads, dual plane intake...    nothing fancy - but that cam was just horrid....     there should be no reason for the timing to be at about 80* is there ?       

[Runner]

rolling thunder,   dont know who your boss is so......   .   it sounds like you did have the wrong cam for what you wanted. mopar cams are a little decieving. if you look at the lift numbers then they are small, but they are ground on a 108 lsa (well the 484 and 509 are) and that gives you alot of overlap and moves the rpm range up. and acording to mp, the @.050 duration numbers are around 241.     i personally liked the way the 484 cam ran and mostly loved the way it sounded, infact my wife was disappointed with the way the comp solid cam sounded when we broke in the 452. the first drive however i forgot all about the way the 484 cam sounded.


  as for my combo with the 383     it was .030 over with stock 906 heads with good springs and a good valve job (NO port work) tm6 intake (ran the same with a torker intake) 8.9-1 compresion measured. cheap ass badger pistons, stock rods and stock 383 steel crank. 750 dp holley, headman headers and a turbo action 10 inch converter that flashes to around 3800 rpm.

    when i put the motor together 10 years ago   i did it with a stock converter, and hp manifolds, and a 3310 holley. the car ran 15.80s, basically wouldnt get out of its own way. a set of headers and a 11 inch, 2500 advertised converter (it flashed to about 2900) and it was low 14s, then i started playing with the timing and got it to go 13.40s then i switch the holley 750 dp and it ran 13.20s then the t/a converter went in and it ran 12.80, more tuning and tweeking to get it to 12.50s with a best of 12.49.

       after 10 years of flawless operation my 484 cam lost a couple lobes so thats when i went to a solid lifter cam, 452 inches and 10-1 compresion. same everything else was the same, car ran a best of 11.80@114mph, i bolted on a set of ootb e-heads and it ran a best of 7.33@93.95 mph in the 7/8 but i ran out of season to get it to a 1/4 mile track. it should go 11.40s-11.50s as thats what the 1/8 mile numbers indicate.     ive sence added a wilson manifolds tappered spacer and im going to put a set of 1 7/8 inch headers on it ( i think thats whats under the christmas tree .


        ghoste, fast68 is the head porter in vermont.   he has done work for ron, including dynoing his engine and i believe(but im not positive) biulding his latest motor. i know you dont seem to care what i think, but ive been there done that with your basic combo, you are in a bad need of another cam or more converter.

     heck i belive that neil likes the mp cams doesnt he?. i know he likes engle cams and doesnt like comps.


     rolling thunder,     i dig your car!