I've got a 1985 E150, manuals and wiring diagrams match 84/cal emmissions. the dizzy is shot and the computer no longer makes any adjustments.

I just picked up a new Mallory 85 series HEI style distributor.

I am trying to get her running b/c I rescently flipped my tractor/trailer avioding a collision and messed up my back. It is extremely difficult to find a vehicle in witch I can position the back straight up. I am trying to decide on a carbureator and need to know what the stock cam specs are.

The PO put on a dual 2.5 in exhaust, but left the stock manifolds, but I cannot do anything about that until I can crawl underneith again. I was mostly wondering if the cam was big enough to use a 600 cfm vac sec, or if I needed to go with a 390 Holley or 500cfm Edelbrock 1403. The reason I was looking at the 600cfm Edelbrock is it comes in a kit and would be about $100 cheaper that buying the parts seperate.

I have downloaded CamQuest from comp cams, but it only has Comp Cams in it and you cannot input cam specs. with the HighEnergy 240H, the smallest cam they have, the Holley 390 seems to be the optimal carb, but with the DualEnergy 255DEH, which is more like the EFI cams, it looks like the 600 would be perfect.

This is not performance, and I rarely rev past 3250, so Tq and economy is what I am after. With the AOD, I need my tq to come on quickly.

Thanks for your time

 

With an upper rpm limit of 3250 rpm, the 390 cfm carburator would be best for power and mileage. The camshaft should be selected with this rpm range in mind.

 

I'm running the stock cam, but I dont know if its the EFI (1500-5800) or older carb (idle-4000) type. I cannot seem to find torque ratings anywhere.

 

I would think that a 1984 or 85 truck would have the lower rpm type cam.

I found these power numbers for both 1984 and 85 truck on this website:
139 hp @ 3400 rpm, 250 ft/lb @ 2000 rpm
Engine_Specifications

 

Stock 5.0 truck cam specs are 0.379/0.395" total lift and 244/256 seat-seat duration.

 

Thanks y'all, do you think it would help the engine breathe with 1.7 rockers on the exhaust side? Not sure, but just thinking, needs valve cover gaskets anyway. Don't have money for headers/exhaust right now. Don't need 'em, but will put Cats back on. We need to at least TRY to keep the air clean, even with Hot Rods, right?

 

The 1.7 rockers will increase the valve lift a little bit so might increase flow out the exhaust. Plus they'll reduce friction ever so slightly, saving a minute amount of fuel and adding longevity to the exhaust valves, which have a harder life than the intake valves.

I'm not sure if the catalytic convertors will work without an air pump.