[Steven Pisonero]

I want to wake my 351M up and maybe even increase gas mileage a bit. I use my 77 Ford LTD as a daily driver. I like getting on it now and again, but don't have any big plans for it in the future, just a cruiser.

Edelbrock 600 and intake manifold, C6 transmission and 327 rear end. Stock manifold, but dual exhaust. I will also be swapping out the distributor for a 32720 performance distributor.

My mode of thought is either a high energy comp cam 252H or 260H. Any thoughts, feedback or suggestions would be appreciated. I am a bit of a novice.

Thanks,

Steve

[Steven Pisonero]

Also, I plan on replacing the rods and lifters, with the swap, but many are suggesting replacing springs to avoid valve float.

[eloc431962]

One of the big thing's with the 351m is the 8.0:1 cr for stock engines. if you really wanted to wake it up you would need to do a complete re-build.
Punch it out a set of forged flat-tops trying to get it up to at-least 9.0:1 cr JMO You already have a decent fit with the edelbrock carb and intake. you will also need to throw some at-least 1 5/8 long tube headers on it also to help it out.JMO someone else will chime in with some more info and maybe better then what i have given you. there are some restrictions on these engines but you can still build a decent one out of them with some work and the proper set-up IMHO



Cole

[JeffB]

Crower Cams has available cams that are focused on specifically improving fuel mileage,give their Tech-line a call.

[techinspector1]

Originally Posted by JeffB

Crower Cams has available cams that are focused on specifically improving fuel mileage,give their Tech-line a call.

Yep, and Isky used to tout their Mile-A-Mor cams years ago. I haven't seen much about them lately, but I would assume that Isky still has the masters.

[Steven Pisonero]

Thanks guys. I know the low compression ratio effects power and fuel economy. Could anybody who is familiar with my boat anchor spit ball what kind of increase I could see vs just re-camming? I found some aussie heads on line, but I am afraid of per-detonation with more than a 10:1 CR.

Thanks everyone

[Steven Pisonero]

pre detonation not per

[techinspector1]

Originally Posted by Steven Pisonero

pre detonation not per

There is pre-ignition and there is detonation, but I don't think there is a pre-detonation. Seems like there could be though, that instant before detonation takes place.....

[eloc431962]

Originally Posted by techinspector1

There is pre-ignition and there is detonation, but I don't think there is a pre-detonation. Seems like there could be though, that instant before detonation takes place.....

Hummmmm!!!!!!!!!!!!!!!!!



Cole