Ford JC51

Thought Id post some of these as Im probably the only one I know of that has done anything with this platform. Ive been running the cylinder head on a 250ci four cylinder in Comp eliminator and Im now building the first 500 that I know of and I have a lot of knowledge on this engine combo. Hopefully youll enjoy the pics. Comment away! Im new to posting here and dont have a clue if my pics will even post or not.



[url=https://servimg.com/view/20286276/9]

Is that a motorsport head?

Clint,

So that's what your secret project is. It looks awesome. Guess that's what you needed all those crankshafts for. You building a B/A ?
I got my A/R Boss Hemi running. Waiting on a clutch.
Are you going to make it to Gateway for the big comp shootout in the spring?

Kent

kpascoe wrote:Clint,

So that's what your secret project is. It looks awesome. Guess that's what you needed all those crankshafts for. You building a B/A ?
I got my A/R Boss Hemi running. Waiting on a clutch.
Are you going to make it to Gateway for the big comp shootout in the spring?

Kent

What date / time @ Gateway? You need track time? Take 2 weeks too tune that baby!

stanger68 wrote:Is that a motorsport head?

I guess you could say motorsport head. Its one of 3 heads legal for Ford oro stock

kpascoe wrote:Clint,

So that's what your secret project is. It looks awesome. Guess that's what you needed all those crankshafts for. You building a B/A ?
I got my A/R Boss Hemi running. Waiting on a clutch.
Are you going to make it to Gateway for the big comp shootout in the spring?

Kent

Yes sir that's it! I'm planning on gateway but with the altered. This will be an AED deal but probably not done til spring

Jim Cunningham (rip) won the lottery twice and loved Fords. He worked with Ford and had this stuff made. Larry Morgan had the fastest engines I know of but the Mustang body held back the performance. Larry put one in his ( then ) Camaro ( carburetted days) and ran under the Pro Stock record. When Jim died the parts and development was bought IIRC by Westbrook racing engines well known for building Super Stock hemis. Tremendous power potential.

gt350hr wrote:   Jim Cunningham (rip) won the lottery twice and loved Fords. He worked with Ford and had this stuff made. Larry Morgan had the fastest engines I know of but the Mustang body held back the performance. Larry put one in his ( then ) Camaro ( carburetted days)  and ran under the Pro Stock record. When Jim died the parts and development was bought IIRC by Westbrook racing engines well known for building Super Stock hemis. Tremendous power potential.

He didn't buy "all" of the parts. I actually own Jim's old clutch resurfacing machine .

How many of those heads were cast and is there many of them still out there? They look like a damn good head.

68formalGT wrote:How many of those heads were cast and is there many of them still out there? They look like a damn good head.

Man Im really not sure. I have 8 raw castings and one more block left. Not much was made by what Ive found out.

gt350hr wrote:   Jim Cunningham (rip) won the lottery twice and loved Fords. He worked with Ford and had this stuff made. Larry Morgan had the fastest engines I know of but the Mustang body held back the performance. Larry put one in his ( then ) Camaro ( carburetted days)  and ran under the Pro Stock record. When Jim died the parts and development was bought IIRC by Westbrook racing engines well known for building Super Stock hemis. Tremendous power potential.

Larry Definitely had the best Ford Hemi JC50s but too my knowledge Larry nor Cunningham ever built one of these the JC51. RIP Jim he was a wonderful man!

590KA wrote:

68formalGT wrote:How many of those heads were cast and is there many of them still out there? They look like a damn good head.

Man Im really not sure. I have 8 raw castings and one more block left. Not much was made by what Ive found out.

Is there a Ford wedge head out there that compares to it, port height, valve angles, etc?

[quote="68formalGT"]

590KA wrote:

68formalGT wrote:How many of those heads were cast and is there many of them still out there? They look like a damn good head.

Man Im really not sure. I have 8 raw castings and one more block left. Not much was made by what Ive found out.

Is there a Ford wedge head out there that compares to it, port height, valve angles, etc?[/quote

You would have to compare it to the DRCE stuff but even then I think its even much better. Plus its More GM design cause number one bank is drivers side forward.

590KA wrote:You would have to compare it to the DRCE stuff but even then I think its even much better. Plus its More GM design cause number one bank is drivers side forward.

[/quote]

Like the RCV head? Do you have to move the lifter bores too?

68formalGT wrote:

590KA wrote:You would have to compare it to the DRCE stuff but even then I think its even much better. Plus its More GM design cause number one bank is drivers side forward.

Like the RCV head? Do you have to move the lifter bores too?[/quote]

No the block is set although a decent amount of push rod clearance work needs done to the head

590KA wrote:Thought Id post some of these as Im probably the only one I know of that has done anything with this platform. Ive been running the cylinder head on a 250ci four cylinder in Comp eliminator and Im now building the first 500 that I know of and I have a lot of knowledge on this engine combo. Hopefully youll enjoy the pics. Comment away! Im new to posting here and dont have a clue if my pics will even post or not.

Clint, I sent you a message over on your LinkedIn account.  Who makes the billet Merc block that you are using in the altered?  Once I get a stock Merc block and Boss head combo nailed down in my FED, I would like to do injected Nitro with the billet block and head.

68formalGT wrote:How many of those heads were cast and is there many of them still out there? They look like a damn good head.

Supposedly, they can still be bought from Ford. None are in stock but, special casting runs are made and the customer will pay the cost..

rmcomprandy wrote:

68formalGT wrote:How many of those heads were cast and is there many of them still out there? They look like a damn good head.

Supposedly, they can still be bought from Ford. None are in stock but, special casting runs are made and the customer will pay the cost..

With the RCV and the Pegasus Engineering heads out there I don't think the extra cost would be worth the money unless you needed pro stock legal heads or wanted it to be a "Ford" head.

68formalGT wrote:

rmcomprandy wrote:

68formalGT wrote:How many of those heads were cast and is there many of them still out there? They look like a damn good head.

Supposedly, they can still be bought from Ford. None are in stock but, special casting runs are made and the customer will pay the cost..

With the RCV and the Pegasus Engineering heads out there I don't think the extra cost would be worth the money unless you needed pro stock legal heads or wanted it to be a "Ford" head.

To run in the Comp Eliminator Econo class.... Heads and block HAVE TO HAVE a Ford part number..

68formalGT wrote:
With the RCV and the Pegasus Engineering heads out there I don't think the extra cost would be worth the money unless you needed pro stock legal heads or wanted it to be a "Ford" head.

These heads are available now? Not just a "talked about" but unavailable thing?

norm wrote:

68formalGT wrote:
With the RCV and the Pegasus Engineering heads out there I don't think the extra cost would be worth the money unless you needed pro stock legal heads or wanted it to be a "Ford" head.

These heads are available now? Not just a "talked about" but unavailable thing?

There were RCV's last year when one of the Nebraska racers built an engine for this year and there was a post on book face about a pallet of Assassin heads less then a month ago. Oh and the Visner billet X460 is a pretty awesome head too, Derik Timmer has set a record with his new engine with the X460's and billet block

68formalGT wrote:

There were RCV's last year when one of the Nebraska racers built an engine for this year and there was a post on book face about a pallet of Assassin heads less then a month ago. Oh and the Visner billet X460 is a pretty awesome head too, Derik Timmer has set a record with his new engine with the X460's and billet block

I have seen the VED heads out there a bit. The other ones not so much.

And i'd rather manscape with a cheese grater than get on "bookface"

norm wrote:

68formalGT wrote:

There were RCV's last year when one of the Nebraska racers built an engine for this year and there was a post on book face about a pallet of Assassin heads less then a month ago. Oh and the Visner billet X460 is a pretty awesome head too, Derik Timmer has set a record with his new engine with the X460's and billet block

I have seen the VED heads out there a bit. The other ones not so much.

And i'd rather manscape with a cheese grater than get on "bookface"

LOL, I don't think many people that have them go out talking a lot about them. From what I've seen a lot of people order blocks without lifter bores for the RCV heads.

Good going Clint.


https://dragillustrated.com/neff-stuns-comp-eliminator-world-with-215-mph-production-gas-ford/

supervel45 wrote:Good going Clint.


https://dragillustrated.com/neff-stuns-comp-eliminator-world-with-215-mph-production-gas-ford/

Awesome article, thank you for posting that.