Crate Hemi from Mopar Performance

[VANDAN]

I am looking at a motor that's for sale, and was hoping to find some who have bought, owned, or worked on the Mopar Performance crate Hemi's that were available prior to about 2010. Does anyone know what pistons, rods, crank and cam shaft was used in most of them, as far as specs, and manufacturer ? It is the 2468330-M block, standard bore, and pistons appear to be around 10-1/2 to 1 CR. Any thoughts or input appreciated...Thanks

 

[dieseldazzle]

I have no first hand knowledge but Fred up in Canada at the hemi shop knows them well. I'd give him a call.

 

[snakeoil24]

All crate Hemis had issues. Leaking oil, burning oil and put together by num nuts. Things are much beter now. I would still build from parts.

 

[moper]

Depending on what your needs are, the rate Hemis are the best way to get all the parts to put one together. But, you really, REALLY have to take any of them apart and have a very cl look at everything. Assume you will need some machining done, plus the wearables. If your plans are big horsepower, the block should be sonic tested before anything else is considered because some of those blocks are almost junk at std bore. Regardless of advertisements.

 

[VANDAN]

Was hoping for some more response on this, as to the quality, and source of the components in the pre-2010 units that were built. Were the parts mainly U.S. manufactured, or mainly imported, sub-quality ? The other factor is if someone basically threw this build together with spare parts, and I would need to re-machine the block, and re-size the the components to fit, thus ending up with a box of parts not needed. The block looks brand new, never run, as does the rotating assembly, and appears to have been balanced ? Aluminum heads have minimal run time, possibly from a break-in run, with very little carbon build up on them ? Weighing the cost of this buy, against starting from scratch to purchase individual parts, and build to desired level. Does anyone have a figure to build a hemi, street-able, pump gas friendly, to around 600 HP/FT#'s, by obtaining individual, choice, quality parts, and having solid, reliable machine work performed ? Again, I appreciate all serious input, as this will probably be my last serious build to get me to the finish...Thanks

 

[Hemirunner]

The heads of that era would be the 2531110-M heads and those suffered some quality issues like valve guide clearance issues (both tight and loose) and issues with valve seats falling out due to inadequate press fit. They had the repop "wide pad" style rockers with issues of ratio being all over, but mostly under ratio as low as 1.3ish. There were significant issues with the hone/ring packages as most had high oil consumption. Along with the above issues, there were countless assembly issues with insufficient pushrod clearance being one of the major issues. If you bought one, assume that you're buying a core for the component parts alone and plan on rebuilding it. With the improvement in parts quality from then to now, the price of an old crate engine would have to be quite low to be worth the frustration. If you're paying to have every aspect of this build done, expect to be in the $17-19K range for a good solid hemi built right.

 

[64 Sportfury]

Here are the specs on the one I bought back in 2001. I got lucky and it lasted over 70,000 miles before I rebuilt it. Engine builder advised that it originally came with an Eagle rotating assembly but Mopar changed components and sub contractors from time to time. I re-used the crank and rods during the rebuild as the needed minor machining and balancing.

The 472 Hemi77 Crate Engine with increased displacement


and power is an


impressive step up from the familiar 426 Hemi. Mopar

Performance recommends the use of an 850 cfm Holley Carburetor


and 2.00" Exhaust Headers


(not available through Mopar).

472 HEMI77 CRATE ENGINE CC 525 HORSEPOWER

Specifications:

Built with all-new components

$$ Heavy-Duty Cast Iron Block with cross-bolted mains

$$ Cast Iron Cylinder Heads

$$ Chrome Valve Covers

$$ Breathers

$$ Stainless Steel 2.25" Intake Valves and 1.94" Exhaust Valves

$$ Heavy-Duty Single Valve Springs with Dampers

$$ Premium Material Valve Stem Seals

$$ 292E° Hydraulic Camshaft CC 0.524"/0.507" lift

$$ Forged Pistons CC 4.250" bore, 9.0:1 compression ratio

$$ Aluminum Dual-Plane M177 4-bbl Intake Manifold

$$ Forged Steel Crankshaft CC 4.150" stroke

$$ Premium Double Roller Timing Chain and Sprockets

$$ Front Timing Chain Cover


$$ 6-quart Rear Sump Oil Pan (1970BB71 B- and E-body style)

$$ 7 mm Silicon Spark Plug Wires

$$ Spark Plugs

$$ High-Performance Electronic Distributor

$$ Heavy-Duty Engine Stand and Shipping Crate

Note: 9.0 :1 compression ratio allows the use of current high-octane premium pump gasoline. Crate

engines that change the emissions performance of the vehicle may not be legal for use on

vehicles regulated for highway use in California and other states. Horsepower and torque

rating based on test engine. Ratings may vary on individual engines.

*P5249666AC 472 Hemi Crate Engine CC 525 Horsepower, 540 ft.-lbs. Torque.

 

[VANDAN]

Well I decided to pull the trigger on this motor, and brought it home on Wednesday evening. It appears to be a new MP block that was never fired, bottom end assembled, only assembly lube present in the pan. Aluminum heads with what looks like minimal run time, possibly a break-in on another motor. Top end is as you see, MP X-Ram, with Holley 4235 & 4236 carbs, with air horns. Other odds & ends included. Plans are to dis-assemble, clean & check all parts, & re-assemble to use in my '65 Coronet, as a Street/Strip NSS ride. I will probably be selling off the top end intake, carbs, and valve covers, and going with a more Era correct set up, maybe just a dual 4, inline for easier tuning & upkeep. If you have any interest in the mentioned parts, drop me a PM, but it probably won't go for a while 'til I decide my path for sure. I want to THANK ALL who gave me some feedback when I posted for their input, and it's always appreciated. Thanks FBBO for this Forum to discuss...

 

[68 HEMI GTS]

The cross ram would look right at home in that thing!!

 

[64 Sportfury]

I vote crossram as well. Good luck with the build whatever combo you use.

 

[glassman]

Well I decided to pull the trigger on this motor, and brought it home on Wednesday evening. It appears to be a new MP block that was never fired, bottom end assembled, only assembly lube present in the pan. Aluminum heads with what looks like minimal run time, possibly a break-in on another motor. Top end is as you see, MP X-Ram, with Holley 4235 & 4236 carbs, with air horns. Other odds & ends included. Plans are to dis-assemble, clean & check all parts, & re-assemble to use in my '65 Coronet, as a Street/Strip NSS ride. I will probably be selling off the top end intake, carbs, and valve covers, and going with a more Era correct set up, maybe just a dual 4, inline for easier tuning & upkeep. If you have any interest in the mentioned parts, drop me a PM, but it probably won't go for a while 'til I decide my path for sure. I want to THANK ALL who gave me some feedback when I posted for their input, and it's always appreciated. Thanks FBBO for this Forum to discuss...View attachment 441051 View attachment 441052 View attachment 441053 View attachment 441054

I like your project and if you need any fiberglass parts, we make them all . Hoods, trunks, fenders, bumpers, doors, scoops, dash boards, backup delete plates. We are Sled City fiberglass. www.sledcityfiberglass.com or [email protected]

 

[moper]

Cool. Good luck with it!

 

[VANDAN]

Glassman, your inbox is full. I am looking for a '65 Race Hemi scoop, the lower height model. Can you send me, or post some info on it ? Pics, price, and does it have the mounting studs incorporated in the mold ? Also, quality of it, as far as how much finishing to get it ready for a quality paint & finish. Will you be at Carlisle vending this weekend ? Thanks

 

[aldal]

Glassman, your inbox is full. I am looking for a '65 Race Hemi scoop, the lower height model. Can you send me, or post some info on it ? Pics, price, and does it have the mounting studs incorporated in the mold ? Also, quality of it, as far as how much finishing to get it ready for a quality paint & finish. Will you be at Carlisle vending this weekend ? Thanks

I bought the scoop that you are looking for from glassman and it was a very nice piece.

 

[SSSN8KE]

I have no first hand knowledge but Fred up in Canada at the hemi shop knows them well. I'd give him a call.

Do you know Fred's shop name or how to contact him? I tried to google "the hemi shop" with no results.

 

[moparedtn]

I dig where this project is "headed" (see what I did there? ).
KEEP US POSTED, please!

 

[glassman]

2 year old thread but I do have a stock 64-65 Hemi scoop in stock and in a box ready to ship.

 

[Challenger340]

We did LOTS of them.... the 426's are typically a Wiseco Piston with an actual "poured" Compression Ratio of around 8.2:1 (but was advertised much higher), internal Machining and Head work is just aweful.
We used to recommend our Customer's go BUY one as a great "Box of Parts" we could them build into something better.... because for the price a guy got a Block, Crank, Rods, Heads, etc., etc.
But alas.... mnay just bought them and ran them "as is" which was when commonly all the "issues" were seen like Oil consumption, poor power, etc., etc.