250cid Cams?

[Bajabrewer]

I'm collecting parts to put a 250 in my 66. I came across a M5OD-R2 5 speed from an f150/300 truck that will bolt to a 250 from a 76 Maverick. I got the adapter to bolt up the Dana 20 & had to cut about a 1/4 inch off the output shaft to get it bolted together. Next up is to rebuild the 250. Comp Cams has 2 cams that both say they work well with stock components. One is 500-4500rpm high energy and the other is 1000-5000rpm also high energy

https://www.compcams.com/high-energy-206-206-hydraulic-flat-cam-for-ford-144-250-6-cylinder.html

https://www.compcams.com/high-energy-212-212-hydraulic-flat-cam-for-ford-144-250-6-cylinder.html

Anyone have experience with either of these? or a similar one? I did some looking over at FordSix performance but it seems they are trying to get top HP & I want low end torque.

 

[Broncobowsher]

Well the one with the 500 RPM higher powerband makes the torque about 500 RPM higher. HP is torque at speed. Torque is mostly a factor of displacement and compression, HP is where the torque falls in the RPM band of the engine.

 

[B RON CO]

Hi, I have a 200 in my 66 Bronco and went with the milder Comp cam. I am happy with the engine. It runs great and has power up to my self imposed red line of 4500 RPM.

The Ford six guys wind the engines quite a bit more, and you are correct, they seem to go for maximum performance.

I also have a 2 barrel conversion head, so my engine is different.

One major glitch you need to be sure to address is you MUST degree the cam. The new timing chain set from Comp cams is OFF!!! I also checked the old chain set that was on the engine and it was the same. Off by @ 17*. I think that is why the guy I got the engine from yanked it out of his Mustang. The cam timing was way off and the engine would not perform very well (but I rebuilt the engine and never ran it before. I really bought it just to get the 2 barrel conversion head). Go to Fordsix and see the "Echo video" on how to rebuild the engine and how he degrees his cam. This is REQUIRED. I needed the timing chain set from Vintage Inlines to get my cam "on the money"

I am not recommending the Comp cam I chose, but I am very happy with my engine. I am a slow lane kind of guy. I will say that the cam, 2 barrel, and modern ignition is light years better than the old 170. Now I can climb hills and cruise at 70 MPH and my foot is not always on the floor like it used to be. Good luck

 

[B RON CO]

Hi, couldn't get pics before. Here is my 200.
Get the Ford Falcon Performance Handbook before getting any parts for your Ford six.
Good luck

 

[bmbm]

250 cam

There are so many factors it seems with cam selection but my choice would be the lower rpm torque selection. Good low end torque is a benefit for off roading in my area going up steep dirt roads with changing surfaces. And one thing I noticed about having the 5 speed od trans and good torque is that on street driving you don't have to wind the engine out to go faster just moderate revs and selecting higher gears. A vast improvement over my old three speed / 200. I highly recommend going to a five speed trans as it improves the whole driving experience so you should enjoy that M50.
Definitely get the Falcon Performance Manual. After reading about cams etc quite a bit I know the 250 has a fair amount of quench and you want to avoid a big cam and high compression unless you reduce quench.
My current 250/NV3550 took care of the drivability and lack of performance issues for me so I have not been highly motivated to start a build of my spare large log 250 but have settled on a torque cam, a reasonable compression bump, 3 angle valve job, probably the Carter BBD 2v carb and my existing DSII ignition. The venerable Carter BBD has recently been discovered by a few Ford six guys as a low cost 2v conversion with good performance returns.

 

[73azbronco]

Get low end cam, and as noted always degree every cam you install.

Don't expect much over 65 on the freeway. But it will be peppy around town or trail.

 

[Jebus]

When I started on my engine swap from a 170 and a 3spd manual I chose a 69 250 inline six.
I was going to use a megasquirt/84 cougar throttle body setup I had. I got to the lack of a rear sump oil pan and was starting process of building one when I switched direction and went with the 3.8 v6...

 

[Bajabrewer]

Great info everyone! I'm leaning toward the lower RPM cam - now I need to learn all I can about how to degree a cam. On a side note I scored some 2011 Ford Fusion front seats with belts so that looks like it's todays project.

Thanks again for the info!!!

 

[B RON CO]

Hi, just a heads up on the cam swap. The Ford Six cam is different from the other engines. There is a steel ring, the "wedding ring", and a dowel pin on the front of the cam.
These parts are very hard to find so be careful and know that you are going to reuse these on your new cam.
In my picture of the degree wheel I used an old lifter and grinded a big bolt to fit tightly. I also had to grind the side of the bolt to keep it from rubbing on the block. This was the best way I could figure so the lifter would make straight contact with the dial indicator.
Good luck