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Edelbrock MP heads / older MP how do u tell difference?

Posted By: HemiDart68

Edelbrock MP heads / older MP how do u tell difference? - 10/28/09 05:04 PM

How does one tell the difference between the old style and new edelbrock MP aluminum hemi heads. I can tell the difference by looking at them in person but is there a part number difference. Is there anything stamped on the head to indicate different part???
Posted By: ZIPPY

Re: Edelbrock MP heads / older MP how do u tell difference? - 10/28/09 05:27 PM

Old casting number: 2531110-M
New casting number: 2531110-M2
Posted By: HemiDart68

Re: Edelbrock MP heads / older MP how do u tell difference? - 10/28/09 05:39 PM

Zippy, You Sir are the man, thank u
Posted By: ZIPPY

Re: Edelbrock MP heads / older MP how do u tell difference? - 10/28/09 05:51 PM

You bet, anytime
Posted By: BB 70 Challenger

Re: Edelbrock MP heads / older MP how do u tell difference? - 11/02/09 05:42 PM

What are the differencies between those two (the old MP Hemi and the new Edelbrock MP Hemi heads) ???

I tried to search but did not find the answer. Please let me know?

Thanks!

Posted By: an8sec70cuda

Re: Edelbrock MP heads / older MP how do u tell difference? - 11/02/09 06:30 PM

Quote:

What are the differencies between those two (the old MP Hemi and the new Edelbrock MP Hemi heads) ???

I tried to search but did not find the answer. Please let me know?

Thanks!





From what I've heard, the Edelbrock heads are a much nicer casting and are a little thicker to allow slightly more flow after porting. CHIP
Posted By: hemi_doug

Re: Edelbrock MP heads / older MP how do u tell difference? - 11/02/09 07:38 PM

Quote:

What are the differencies between those two (the old MP Hemi and the new Edelbrock MP Hemi heads) ???

I tried to search but did not find the answer. Please let me know?

Thanks!





The seats fall out of the older castings......

I wouldn't touch one of those heads with a 10 ft pole....
Posted By: Bob_Coomer

Re: Edelbrock MP heads / older MP how do u tell difference? - 11/02/09 07:48 PM

I have a newer set with the M2 number. There is also the Letter stamped "E" on the head kinda sideways. It looks like the letter used on Edelbrock products..well kinda.
I have a bunch of pics, and with a MCH CNC port program they will break the 460cfm mark...
Posted By: CRE2004

Re: Edelbrock MP heads / older MP how do u tell difference? - 11/02/09 09:40 PM

I have a new set of the M2 heads on the shelf. PM me if you need them
Mike

Attached picture 5582298-31908111.jpg
Posted By: Gtxxjon

Re: Edelbrock MP heads / older MP how do u tell difference? - 04/11/21 11:14 AM

Hi hemi folks,

I have now got an NOS 2531110M and a NOS 2531110-M2 'side by side' and they are very similar except...

A much better exhaust PORT in the Edelbrock M2 head! panic

To let the Flames OUT!!! weld ozbbq
Posted By: Anonymous

Re: Edelbrock MP heads / older MP how do u tell difference? - 04/11/21 02:43 PM

Wow! Talk about scratching an old thread. I wonder what happened to Bob Coomer? He hasn't been around since 2017.
Posted By: sixpakdodge

Re: Edelbrock MP heads / older MP how do u tell difference? - 04/11/21 11:49 PM

Originally Posted by Superfreak
Wow! Talk about scratching an old thread. I wonder what happened to Bob Coomer? He hasn't been around since 2017.


I always wondered what happened to the '65 Belvedere he was building. He had it just about finished, then dropped off. When he came back on, had a B-1 Duster he was putting together.
Posted By: cudaman1969

Re: Edelbrock MP heads / older MP how do u tell difference? - 04/12/21 12:43 AM

I wanna know more about these seats dropping out, what’s the fix if it’s a real problem?
Posted By: maximus

Re: Edelbrock MP heads / older MP how do u tell difference? - 04/12/21 11:40 AM

They haven't had loose seats since the early 1990's. They didn't have a tight interferance fit, so some came loose.
Posted By: Gtxxjon

Re: Edelbrock MP heads / older MP how do u tell difference? - 04/13/21 05:58 PM

Oops I was doing some correspondence with Zippy to get another head and picked this very old thread by error!

The M2 head is a much better casting and has a revised exhaust port.
Most of the newer design hemi heads are “all about the exhaust issues”.
Obviously when the original head and ports were ‘canted over’ for passenger car fitment, it reduced flow... fan

Now the M2 head is ‘way out’ of production, it’s a worry indeed!
Lots of folks need one or two M2’s for their current builds...

Edelbrocks themselves are in a big moving scenario and deny even casting the M2’s... shruggy

But a very nice man did email me to say, they will be available soon?
How did he know this if they don’t actually make them lol? work work work runaway
Posted By: an8sec70cuda

Re: Edelbrock MP heads / older MP how do u tell difference? - 04/23/21 12:49 PM

My MP heads are from the early/mid 2000s and haven't had any seat issues.

The Edelbrock castings that replaced the MP heads have an "E" cast into them on top of the head. They don't say "Edelbrock" on them, just have the Edelbrock font "E" on them. I have a pair of them in the shop...if anyone wants a pic, I can get you one.
Once Edelbrock came out w/ their own heads, they have the full "Edelbrock" cast onto them. That's a whole different head though.
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