Edelbrock #60189 heads

[c00nhunterjoe]

800 a peice for a complete head? not bad in my opinion. this should be a nice motor when its all said and done

[christianlarsen]

I just recieved the MP452 heads and they look nice! 

In the instructions I see that mopar recommend adjustable rocker arm assembly P4120974.
I had planned to reuse the original rocker arm assembly, pushrods etc. is that ok to do or must I follow mopar's instructions ?

/Christian

[christianlarsen]

I would also like advice on the spark plugs i should use ?

Now im using champion J8C but that could be incorrect and I suspect that the new heads also changes this ?

[firefighter3931]

I just recieved the MP452 heads and they look nice! 

In the instructions I see that mopar recommend adjustable rocker arm assembly P4120974.
I had planned to reuse the original rocker arm assembly, pushrods etc. is that ok to do or must I follow mopar's instructions ?

/Christian

With the 484 cam you can reuse the stock rockers, pushrods etc...no problem 

Yes, those heads are sweeeet....allmost to nice to bolt onto an engine. 



Ron

[firefighter3931]

I would also like advice on the spark plugs i should use ?

Now im using champion J8C but that could be incorrect and I suspect that the new heads also changes this ?

Yep, you will need new plugs for the aluminum heads. NGK BCPR-6ES will work great ! 



Ron

[christianlarsen]

Hi

I got the mp452 on the engine with everything else you specified and what an unbelievable difference!
i notice:
-better start
-much less shaking when running idle (close to still and i suspect the old fan in front might be in on it..)
-totally cool sound
-alot more power


I just ran the car for an easy ride (no kickdown of any kind  ) but the sense of more power/better combustion is very noticable and i had to yank my chins of my ears after...

To everyone who helped me out in this thread i thank you very much. Ron, I especially owe you great thanx for your advice and patient explanations!  thnx m8

/Christian

[firefighter3931]

That's fantastic news Christian ! 

Wait until you really hammer the throttle !!! 

Not surprising it feels much stronger....you picked up an easy 75hp with the aluminum 452's and the (closed) combustion chamber is much better for throttle response.

Good work buddy 




Ron

[christianlarsen]

Hi Ron.

I tried a couple of kickdowns now and the engine is still knocking when it pulls hard (it pulls very very hard by the way  and .)
I think the timing has to be lowered/retarted a bit. Can you tell me what range the timing must be within ? im running the engine on 95 pon (over here its 99 ron) so i dont believe its an octane problem rather timing.

/christian

[flyinlow]

I used Hooker comps on my 446 with Eddy Heads (84cc). Drivers side is fine  Pax side #2 and #8 plugs are very close . Clearenced headers and use plug boot insulators. ( and carry a spare plug wire). TTI s would be nice. Hookers have good ground clearence on my 73.

Edelbrock says the angle plug is worth 15 hp over the straight plug Mopar heads that they make.

I have srp flat top piston with valve reliefs. 10.6 CR .020 deck  if i remember .Runs well on 94 Ultra, ok on 92.