HP
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From: Schuylkill County
HP
I have a 1978 F250 with a stock 351m. I put an Edlebrock dual plane high rise on it with a 650 cfm thunder series carb. Put a new Mallory ignition in it and headers. No pollution parts at all. Took the A/C pump off and did away with all unnecessary vacuum lines. New E3 spark plugs and indexed them. Does anyone have any idea how much HP I may be producing?
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Base HP is 132 or 137, depending on auto or manual.
Engine_Specifications
Smog parts gone: 3 to 5 hp.
Ignition: 1 or 2, maybe more if you recurved the ignition advance.
AC pump and plugs: 0
Headers, carb and manifold: Maybe 50-60.
Does it rev over 3500 rpm?
Does it feel vastly more powerful, outside of the extra noise it makes?
Spin the tires easily?
The power killers for the 351m are the low compression with sunken piston and the cam.
You've pretty much done all you can without opening it up, so you'll have to see what you think. Next step is a 400 crank, decent pistons, decent cam and related items. 300 horse. Add heads and a few other tweeks and you are 400 horse.
Engine_Specifications
Bubba's M-Block Ford V8 Workshop
M-Block 351M/400 Parts Reference
Everything you need and more:
TMeyer, Inc. Precision Automotive Machining
Engine_Specifications
Smog parts gone: 3 to 5 hp.
Ignition: 1 or 2, maybe more if you recurved the ignition advance.
AC pump and plugs: 0
Headers, carb and manifold: Maybe 50-60.
Does it rev over 3500 rpm?
Does it feel vastly more powerful, outside of the extra noise it makes?
Spin the tires easily?
The power killers for the 351m are the low compression with sunken piston and the cam.
You've pretty much done all you can without opening it up, so you'll have to see what you think. Next step is a 400 crank, decent pistons, decent cam and related items. 300 horse. Add heads and a few other tweeks and you are 400 horse.
Engine_Specifications
Bubba's M-Block Ford V8 Workshop
M-Block 351M/400 Parts Reference
Everything you need and more:
TMeyer, Inc. Precision Automotive Machining
Save the old ones
Joined: Dec 2002
Posts: 666
Likes: 4
From: Boyne Mich
First does it feel more powerful to you ? Hopefully but like 85e150 says, cam and compression next or at least the cam and chain.
Intake, carb, headers, ingition, - All good stuff.
These motor have 2 major isuues heads and cam timing. ( yeah, no compression either)
Heads are too expensive, but a cam with a straight up timing chain should really wake it up.
Intake, carb, headers, ingition, - All good stuff.
These motor have 2 major isuues heads and cam timing. ( yeah, no compression either)
Heads are too expensive, but a cam with a straight up timing chain should really wake it up.
Last edited by Drac; Apr 16, 2013 at 04:00 PM. Reason: spelling
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