HP2

polarus

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I just purchased a 440 from a fellow member, the pad on top is stamped HP2. I thought the 2 stood for second shift, my friend thinks it means six pack internals, who's right?
 
HP = High Performance version of the engine, 440 in this case.
2 = Second Shift build according to some reference sources on the internet.

Visit:

440 Source.com Everything you've ever wanted to know about blocks and more....

Scroll Down to; "There is absolutely no physical difference between a block with an HP or HP2 stamp and one without, where it states:"

All blocks were cast and machined at the foundry, and then assembled at Chrysler's 2.1 million square foot "Trenton" assembly plant in Trenton, Michigan. During assembly, if the engine was given high performance cam and valve springs, or in some cases other items that differed between HP and non-HP engines such as: six pack rods, carbs, etc., then the engines ID pad would be stamped with HP. All blocks originally came from the same place, and there is absolutely no difference in cylinder wall thickness, nickel content in the cast iron, strengthening ribs on side of the block by the freeze plugs (see below for the real story on this,) or any of the other myths you have heard. The number 2, which you may find after the HP, (or in the case of non HP blocks, you may find just a "2" by itself, usually in the lower right hand corner of the ID pad) refers to the shift during which the engine was assembled. In running a factory, one 24 hour day can be divided into three 8 hour shifts. The first shift was considered a "1" however to save time, Chrysler did not stamp a "1", they just left it blank. So an HP2 engine, only means that the engine happened to be assembled on the second shift. There is no advantage to an HP2 block over an HP. we have never seen an HP3, (or just a "3") although Chrysler does allow for it in their documentation, so let me know if you have one or have seen one. Also of note is that non-HP engines usually used the same heads, intake manifold, and many other parts, which is great since it makes it a lot easier to bring a non-HP engine up to the power levels of a factory HP and beyond. But unless you are doing an original restoration, don't worry about finding and/or paying extra for an HP block.

Having read the above, Police Car Spec engines typically had heavy/severe duty internals and it just may have 6-pack internals. Once you pull the pan, you should be able to tell what is inside.
 
Thanks Bill, Mark sent me a link that had the same info. (I should have read my E-mail before posting.) Interesting information, on police spec engines. I'm very curious to see what's inside. I'll update when I get it apart.
 
Having read the above, Police Car Spec engines typically had heavy/severe duty internals and it just may have 6-pack internals. Once you pull the pan, you should be able to tell what is inside.

How are these engines with different internal marked/designated externally to facilitate shipping? Color? Stamps? Engine assembly marking? Decals?

“Police car spec”. Any documents showing the differences between police engines and standard non HP or HP engines?
 
Interesting question, I've never seen anything stamped or marked on an engine to indicate a police special motor. Fleet orders are a subject that interest me but I don't have a lot of info.
 
I have 1967 engines with HP2 stamped. The were no six pack rods or indication systems available on cars in 1967.
 
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As noted the 2 following the HP is a shift designator. For most years starting in '66 thru '71 most of the police high performance engines, 375 horse, were painted Hemi Orange. That would be a starting point. The 350 horse engines were turquoise or blue depending on the year. The rest of the differences are more subtle. Most police cruisers had the high performance exhaust even on the 350 horse variants. A lot of the 350 horse variants also retained the AVS carbs until '72 when all 440s went to Holleys.

Starting in late '69, the police high performance had 6 pack rods and a forged steel crank. Quick ID, the harmonic balancer will have an egg shaped center section, this was a standard feature until the end of the '73 model year. For '74 and on the engines had an iron crank with the heavy rods.

Dave
 
As noted the 2 following the HP is a shift designator. For most years starting in '66 thru '71 most of the police high performance engines, 375 horse, were painted Hemi Orange. That would be a starting point. The 350 horse engines were turquoise or blue depending on the year. The rest of the differences are more subtle. Most police cruisers had the high performance exhaust even on the 350 horse variants. A lot of the 350 horse variants also retained the AVS carbs until '72 when all 440s went to Holleys.

Starting in late '69, the police high performance had 6 pack rods and a forged steel crank. Quick ID, the harmonic balancer will have an egg shaped center section, this was a standard feature until the end of the '73 model year. For '74 and on the engines had an iron crank with the heavy rods.

Dave

Again, this is the standard 440 HP assembly. Other than body specific items, such as exhaust manifolds, or application specific ancillary equipment, like distributors, there is nothing different about the assembly in a C body fleet car than any other Magnum/Super Commando/TNT. There are no special or exclusive “cop car” internals compared to other assemblies. A 440 HP assembly is a 440 HP assembly regardless of the body or application.

Can you provide factory documentation that orange was used on 440 HP assemblies before the 69 MY? (PLEASE do not use the error filled internet nugget list showing assembly colors like orange 318s and things like that)

If the 'cop car' engine assemblies are somehow 'different' than standard C bodies, then this could be easily documented via broadcast sheets. A different assembly for a different application would carry a different assembly number. Below two sheets show the same L code E86 (HP) non A/C 919 ENGINE assembly in both a 1969 DK41 and a DM27.

69_919_ENGINE.jpg
69_C_Body_919_Engine.jpg
 
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How are these engines with different internal marked/designated externally to facilitate shipping? Color? Stamps? Engine assembly marking? Decals?

“Police car spec”. Any documents showing the differences between police engines and standard non HP or HP engines?

Wouldn't The block would have a police car VIN stamped on it?
 
Far as I know, the factory documentation for the colors all went to the dumpster with the rest of the records. The paint number for '66 and up for the hemi orange color was listed as P4349216. You are correct, the engine assemblies were the same, I was not suggesting that they were not. Cruisers were built around the standard engine with some tweaks to the carbs distributors and exhaust. And yes the original cruiser engines would have had the VIN number for the years that was appropriate. CK,DK or PK for C-Bodies for the first two digits.. The original engines were often replaced with crate motors at some point as they led a tough life. Many jurisdictions replaced the engine and transmission at 70k or they just replaced the whole unit. The crate motors we installed as warranty replacements were generally "new short motors" in either 350 or 375 horse. They were a standard items.

Dave
 
My 69 CHP 440 is a standard HP 440, broadcast engine assembly code 919.
It was painted street Hemi orange.


Alan
 
FACFB15B-CEC3-454E-B85F-95ACFAFCF3F7.jpeg
9475B2F1-5511-47B4-9F51-6136DDD05B4A.jpeg



The standard
How are these engines with different internal marked/designated externally to facilitate shipping? Color? Stamps? Engine assembly marking? Decals?

“Police car spec”. Any documents showing the differences between police engines and standard non HP or HP engines?


A Broadcast Sheet, and a number on the rocker cover tells the story.

Pursuit Commando 440: 360 HP

Pursuit Super Commando 440: 375 HP

I have a complete unrestored and unassembled 440, 360 HP Pursuit Commando engine that I’ll be tearing down at some point. I’ll be checking it for any internal component differences from standard production engines.
 
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My '70 PK41 has an assembly code on an E86, non A/C of 117. It is attached to the 670 code automatic

Dave
 
View attachment 296612 View attachment 296613


The standard



A Broadcast Sheet, and a number on the rocker cover tells the story.

Pursuit Commando 440: 360 HP

Pursuit Super Commando 440: 375 HP

I have a complete unrestored and unassembled 440, 360 HP Pursuit Commando engine that I’ll be tearing down at some point. I’ll be checking it for any internal component differences from standard production engines.

Any VIN or option code differences between the "C" and "SC" 440-equipped vehicles?
 
Wouldn't The block would have a police car VIN stamped on it?

VIN wasn’t stamped until the engine and tranny was mated to the car meaning how was the assembly marked “cop car only” when it left the engine assembly plant and before it reached the assembly plant?
 
Please post pics of the sheet so we can compare to other 70 U code C bodies.

I had to drop this as a pdf, click on mail.pdf to open, not the icon. Car was an Oregon State police cruiser from mid '70 to early "73. Oregon turned their cruisers at 70k. The were base model cruisers with no A/C and few other options other than the special order police package. If this does not open, send me and PM and I will e-mail.

Dave
 

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