Comp Cams XE250H-14. Its a grind specifically for the 302 EFI Speed Density engines.

My truck is an 86 F-150, stock EFI engine exept dual exhaust, shorty headers, and an H-pipe. It has a 3.55 rear, OD automatic trans, 2WD. I'm looking for more power, better fuel economy (if thats possible with this cam).

Looking for any real world experience using this exact cam.

Thanks.

Ryan.

 

what are the specs on the cam (lift, duration, etc.)?

 

I put a new cam in my 86 F150 4x4 with a 302 and you have to be real careful about how high you go. I do not know the lift or duration of the cam you have specified but you don't want to go to high and DO NOT use a 302 HO cam as this will not run with the truck computer. You need a non HO cam for this truck
I used a Crane Cam with dual exhaust and got it running right, finally.

I used a Crane cam PowerMax 2020

Crane web location for the exact cam (Just cut and paste into your web address:
http://www.cranecams.com/index.php?s...Size=302%20C.I.

If you are putting in a new cam, it needs more air in and more air out to help it work for you. A new hi-flow air intake and definitely a bigger exhaust or at least duals is the way to go. Do both or it's not worth it

Got any other questions put me out a line.

Regards
Bruce P.

 

The XTREME ENERGY camshaft is a hydraulic flat tappet camshaft. The operating range is from 600 to 4800 rpms. The camshaft grind number is XE250H. The duration @ .050 is intake 206 exhaust 212. The lift w/1.6 rocker is intake .460, exhaust .474. Comp Cams says it has very strong torque, excellent mileage, and a smooth idle. My mistake, I missed the -14 on the XE250H. I can't find that gind.

 

Found it. EFI speed density that works w/stock computer. The operating range is 1000 to 5200 rpms. The camshaft part number is 31-255-5. The grind number is XE250H-14. The duration at .050 is intake 206, exhaust 212. The lift w/1.6 rocker is intake.462, exhaust .474. This is a hydraulic flat tappet cam for EFI.

 

Mako

You mentioned that the cam will work with a speed density and an EFI using this stock computer. If I am not mistaken you mean a MAF (mass Air Flow) system and yes the mass air flow system from Ford and the corresponding computer will work with this system and cam. Works real well in my mustang

BUT I believe the 1986 Truck EFI system is a MAP system with a TFI unit. My 1986 truck was!
This system and its computer does not measure air flow but uses a MAP (Manifold Absolute Pressure) system that is limited in running with an aggresive cam as speced out.

The Promax 2020 cam I used works with my system but just barely, as I had to do some ignition timing advancements for the cam. I ended up at 11.5 - 12 deg of advancement (stock is 10 deg) to run this cam and allow the computer to adjust the timing and fuel. This was from trial and error.
I also had to set the idle at 1,100 to keep the engine from hunting for a smooth idle due to the MAP sensor trying to maintain an even manifold pressure at a lower idle. As I said, it works, but just barely. I would think if one wanted to go to a more aggresive cam it would better to go to a MAF and the corresponding computer and wiring harness. (About $1,100 - $1,300 bucks for all the components and wiring

Bruce P

 

I was quoating directly from Comp Cams catalog. They say it is for speed density and it works with a stock computer.