Wich could be a good rocker set for the Mopar 452 heads

Posted By: Coke

Wich could be a good rocker set for the Mopar 452 heads - 05/03/11 11:47 AM

Good day all

I have a 440 block with the "452" MP aluminium heads,and now i need to order the camshaft ,pushrods and the rocker set.
Wich could be a good rocker set for these heads for a reasonable price?

Since it is going to be a street car i think that i,m going to order this cam:
http://www.summitracing.com/parts/CCA-CL21-227-4/

Thanks a lot for any input.

Posted By: Anonymous

Re: Wich could be a good rocker set for the Mopar 452 heads - 05/03/11 01:08 PM

Call Todd at Marsh Performance--a sponsor here --he will ship to you and get you exactly what you need--he knows and will treat you well

Posted By: ahy

Re: Wich could be a good rocker set for the Mopar 452 heads - 05/03/11 01:12 PM

Lots of choices. The Comp Cams "pro magnum" cast alloy steel work very well in your application. They are robust and don't have fatigue issues and generally have excellent sweep over the valve tip with no adjustment. They also work well with the stock oiling setup. Get the matching shafts and hold downs to go with them.

Another good choice are the Crane ductile iron rockers that are going back into production I understand. Similar benefits, just a little more weight to deal with.

Posted By: Mr.Yuck

Re: Wich could be a good rocker set for the Mopar 452 heads - 05/03/11 01:19 PM

With that cam you can probably use MP chrome shafts and HD rockers. Just make sure your valve springs can handle the seat pressure. As for push-rods I'd guess any aftermarket set would work.

Posted By: fourgearsavoy

Re: Wich could be a good rocker set for the Mopar 452 heads - 05/03/11 04:13 PM

Quote:

With that cam you can probably use MP chrome shafts and HD rockers. Just make sure your valve springs can handle the seat pressure. As for push-rods I'd guess any aftermarket set would work.

The only upgrade might be a set of Isky or Crane iron rockers done by RAS. They can bush them,re-direct oiling,check the ratio,and install new hardware.You can find them used for around $75-$150 on the net or at swap meets

These rockers would give you room to grow in the future.
Gus

Attached picture 6615387-burnoutpicturegus.JPG

Posted By: NachoRT74

Re: Wich could be a good rocker set for the Mopar 452 heads - 05/03/11 07:29 PM

I got PRW steel ones long time ago, able to keep the stock round-round pushrods... Not installed yet but sure looks like a good option ( got in half of price being sold now )

http://cgi.ebay.com/ebaymotors/PRW-MOPAR...sQ5fAccessories

Posted By: BSB67

Re: Wich could be a good rocker set for the Mopar 452 heads - 05/04/11 12:08 AM

Quote:

Lots of choices. The Comp Cams "pro magnum" cast alloy steel work very well in your application. They are robust and don't have fatigue issues and generally have excellent sweep over the valve tip with no adjustment. They also work well with the stock oiling setup. Get the matching shafts and hold downs to go with them.

Another good choice are the Crane ductile iron rockers that are going back into production I understand. Similar benefits, just a little more weight to deal with.

Posted By: Coke

Re: Wich could be a good rocker set for the Mopar 452 heads - 05/04/11 12:28 AM

Thanks a lot for the replies,

Then ,is not necessary to install aluminium rockers?
I always heard that install an iron set up on aluminium heads is a botched job..

About the cam ,it was suggested to me like a good option for my intention,wich is to build a strong street car with a good low rpm torque.Nothing for the track.
That is why i,m considering to order it,in fact i didn,t look much more

Posted By: fourgearsavoy

Re: Wich could be a good rocker set for the Mopar 452 heads - 05/04/11 02:24 AM

That sounds like a good street cam but make sure you check your piston to valve clearance

I am using Isky iron rocker on Indy EZ heads and they are working great.The cast iron rockers will sometimes gall on stock type shafts.I recommend hard chromed shafts with whatever rocker you choose

Gus

Attached picture 6616246-burnoutpicturegus.JPG

Posted By: Coke

Re: Wich could be a good rocker set for the Mopar 452 heads - 05/04/11 10:44 AM

Thanks Gus,

I,m still waiting for the alu heads,i ordered them to summit,and they use to take 3-4 weeks to receive them from the factory.
However the pistons are flat top,stock type.The piston at TDC is around .05" under the block surface and the gasket is going to be 0.039".
Until now,this engine was running 906 heads(87cc) with this cam:
http://www.summitracing.com/parts/CCA-21-248-4/

So i hope not to have troubles with the new cam...

Thanks again for your invaluable help

Posted By: NachoRT74

Re: Wich could be a good rocker set for the Mopar 452 heads - 05/04/11 03:46 PM

With what I have learnt ( not personal experienced ), the cam it had is too much duration for the compression on 87 cc and composite gasket... SPECIALLY on a street car. Beside will be requesting a HIGH torque converter stall, even more with the low compression ( it looks around 9.3~9.5:1 )? Dunno what the last owner was thinking when build that

staying below 240 at 050 will be more healthy. Maybe close to 235 max, so the first one you posted looks waaaay better option

Posted By: Coke

Re: Wich could be a good rocker set for the Mopar 452 heads - 05/04/11 11:38 PM

Hi Nacho,
The engine was "Performed" by Arrow Racing in Michigan.
I have a several sheets and documentation about this engine.The last owner gave me all this stuff with the car.
I didn,t like how it was running.It was almost impossible to burn tire under acceleration.

Regards

Posted By: NachoRT74

Re: Wich could be a good rocker set for the Mopar 452 heads - 05/05/11 04:51 AM

por eso decia que me parecia una combinacion un poco extra�a como para que quedase bien

Posted By: Coke

Re: Wich could be a good rocker set for the Mopar 452 heads - 06/05/11 10:56 PM

Hello again.

Would it be possible to use the rockers wich was working with the mechanical cam and the 906 heads ? It has Isky Non roller rockers.

Do the hydraulic cams require an special roller kit or can be these used with both?(Mechanical or hydraulic)

Thanks again

Posted By: MoparforLife

Re: Wich could be a good rocker set for the Mopar 452 heads - 06/05/11 11:36 PM

use the same rockers if you want. Just don't over preload. and the solid pushrods will not work on a hydraulic lifer cam as they will be way too long.

Posted By: Coke

Re: Wich could be a good rocker set for the Mopar 452 heads - 06/15/11 11:49 PM

Hi,thanks for the reply and sorry for the delay,i have been a little busy these days.
To mount the existing rocker arm is not going to be an option since the other day i noticed that one of the rockers is different .It is shorter than the other ones and i don,t know how it was working ,because it does seem that i can,t arrive to the valve.

Uploaded with ImageShack.us

Uploaded with ImageShack.us

Due that i,m pretty sure that i,m not going to be able to found one of those Isky vintage rockers for replacing it ,i,m considering to order this harland sharp kit,because it does seem to have a good price -quality relation- ship:

http://www.summitracing.com/parts/CSP-S70015K/

What i don,t know if i will need more parts for installing it...

Posted By: Stanton

Re: Wich could be a good rocker set for the Mopar 452 heads - 06/16/11 12:12 AM

That short rocker is for a smallblock.

You could try these guys to see if they'll sell you one rocker: http://www.rockerarms.com/rockerarms.com/Home.html

That Harland Sharp kit is complete except for the bolts or studs to hold it down.

Posted By: AndyF

Re: Wich could be a good rocker set for the Mopar 452 heads - 06/16/11 02:18 AM

Those rockers that you have will be fine once you get them fixed up correctly. Looks like you have at least one small block rocker arm on there and you might have more. Check it over carefully. Look to see who made those rocker arms and then search for another set of used ones. Those could be Crane or Isky rockers. Might also be factory rocker arms but that is less likely. I see in the picture that one of the rocker arms says Isky on it, but the others don't say that. So you might have a mixed set consisting of different vendors as well as big block and small block. If those rocker arms came off of your engine then I'd wonder about the other stuff that is in the engine. Might have been an "inventory clean out" special or something.

Posted By: Stanton

Re: Wich could be a good rocker set for the Mopar 452 heads - 06/16/11 04:10 AM

Quote:

The engine was "Performed" by Arrow Racing in Michigan.
I have a several sheets and documentation about this engine.The last owner gave me all this stuff with the car.

From the looks of it either Arrow screwed the customer or the previous owner screwed you. Those Isky rockers are good rockers ... I'd try to complete the set if I were you.

If it comes down to it, there is absolutely nothing wrong with running two different brands or types of rockers as long as all intakes were the same and all exhausts the same. Your bad one looks to be an exhaust so you could buy a set of aluminum exhausts and use all the Isky intakes. The motor will never know the difference.

No matter what you do, get rid of those springs and use spacers and replace those factory hold-downs with something else.

Posted By: Coke

Re: Wich could be a good rocker set for the Mopar 452 heads - 06/17/11 11:21 PM

I see in the picture that one of the rocker arms says Isky on it, but the others don't say that. So you might have a mixed set consisting of different vendors as well as big block and small block. If those rocker arms came off of your engine then I'd wonder about the other stuff that is in the engine. Might have been an "inventory clean out" special or something.

Hi,

All of them are Isky except for the one that you can see in the picture.I have sent a mail to rockerarms.com to see if they have a single one around them.

The person who sold me the car was working for Arrow Racing for a while and he build his engine in their workshop out of the business hours.
I supouse that he wouldn,t last very much there because at the moment,i have found two inverted pushrods,the lips of the rear main seal were pointing to the flywheel and now the small block rocker .

Go figure

Posted By: fourgearsavoy

Re: Wich could be a good rocker set for the Mopar 452 heads - 06/18/11 02:20 AM

I would really call them at RAS because they have a history of not answering E-mail

Gus

Attached picture 6687718-burnoutpicturegus.JPG

Posted By: Coke

Re: Wich could be a good rocker set for the Mopar 452 heads - 06/26/11 02:07 PM

Quote:

I would really call them at RAS because they have a history of not answering E-mail
Gus

I can say that it is a very well deserved fame...

However after looking for info about these isky rockers,i have found that they are still in production but they are only available as sets of 16 units.The other trouble is that they are rated for a 1.440" max. Spring diameter and the Mopar heads have 1.550" springs,so i think that it is going to be safer to mount a new set of rockers.