[47prostreet]

A friend asked me to keep a "lookout" for a steel crank out of a larger Ford Truck. I assume that it would be like a F-600-650. I think he said in the eighties. He runs a 71 Mustang in NHRA "stock" class. and has to have only stock dimensions.

What does our panel of experts know about this TRUCK crank ? ANd can I find them in the junkyards :?:

 

[Gary Blair]

Vic

Is that you Vic?

 

[DaveMcLain]

truck crank

The steel crank was used in the 1980's 429 Lima engines. I'm not sure exactly which engines used them but I've personally built a 429 truck engine for a customer with a late 80's Ford F-700 box truck. This engine had fuel injection that looked very similar to the injection used on the 460 engines in those years, same for the heads.

The question is, why does he want to use one of those cranks? They are nice but they are sure heavy. Turning down the snout to regular 429 dimensions shouldn't be all that big of a deal however and it certainly would be a nice strong piece.

 

[47prostreet]

Steel Crank

Hey Gary and All:

Nope it isn't Vic, But I am a friend of Vic's. Not sure exactly why he wants a Truck steel crank other than the strength of steel. He seems to do well at what he is doing though. 8)

 

[Paul Kane]

1979-1996 F700 & F800 commercial trucks with the gasoline burning 429 engine. Although the 370 gas motor has the same stroke crank, it is almost surely always a cast version of the crankshaft. (Just checked out a local commercal truck dismantler, and EVERY 370 crank they had in the rack was cast.)

The forged version has the following number stamped on it: D9TE-6303-AA (suffix may also be "BA," or just an "A." I think.) I have seen a few that were produced in the early nineties, and I think the number was F2TE-6303-BA. They can be confirmed the forged version of the crank by this number or also by the wide parting line, as shown in the photos below:

They are made of 1075 steel and are plenty strong for the same reason that all production 385 Series cranks are strong: that immense amount of journal overlap. Here is an engineering drawing that depicts structural integrity by way of the journal overlap of the 429 cranks (all 429 cranks, cast or forged), the top circle representing the 2.500" rod throw and the lower circle representing the 3.000" main journal. This particular drawing is with the 429's 3.59" stroke:

Note the amount of overlap area (a whopping 1.371 sq in) and that the overlap's width is .955" at its widest cross section. Try THAT with a chebby!

Paul

 

[DaveMcLain]

It's interesting how the crank in Paul's photos looks different than the one in the engine that I built. That one had the part number engraved onto the side of the crank with writing that looked sort of like print from a dot matrix printer.

 

[BBBob_M]

1979-1996 F700 & F800 commercial trucks with the gasoline burning 429 engine. (Just checked out a local commercal truck dismantler, and...

Paul

So how many forged cranks did you find there? Were they reasonably priced?

 

[Lem Evans]

WOW ! nice post Paul .

 

[Ranger50]

A friend asked me to keep a "lookout" for a steel crank out of a larger Ford Truck. I assume that it would be like a F-600-650. I think he said in the eighties. He runs a 71 Mustang in NHRA "stock" class. and has to have only stock dimensions.

What does our panel of experts know about this TRUCK crank ? ANd can I find them in the junkyards :?:

My guess here is he runs a 429 class engine, so instead of spending BIG bucks for an original, he is running a more readily available, IE- cheaper, late model crank.

Just a WAG.

Brian

 

[VIC GUILMINO]

STEEL CHANK

I am looking for a steel chank because i crank a 4u chank
we do not run cheap parts in nhra stock
i run 10.5 at 126 in d/stock auto
i do not like the wt. of the steel chank but i can not keep crank the 4u chank at $1800 bye the time all the machining is done

 

[Dragsterman]

Re:crank

Hi, Vic call Gary blair
or you can PM him If there's one around I'm sure he can get you one.
But he's with out power the wind downed some trees

 

[Paul Kane]

1979-1996 F700 & F800 commercial trucks with the gasoline burning 429 engine. (Just checked out a local commercal truck dismantler, and...

So how many forged cranks did you find there? Were they reasonably priced?

BobM, not a single loose forging; they were all in complete engines...

Paul

 

[Paul Kane]

WOW ! nice post Paul .

Lem, I have engineering drawings for every shelf stroke and journal size out there, and then some. They offer some interesting insight when deciding on a crank for a high HP app. I've added these engineering drawinings to the High Flow Dynamics "Technical Pages" section of the website...check 'em out! (The link to the Technical Pages is under the "Performance Block Prep" page of the main website.)

Paul