E7 Heads On 351w H.O.?

84_BroncHo

New Member
Joined
Aug 27, 2012
Will E7 heads produce more flow and power over the stock H.O. heads? Im making a mud truck out of my high school ride and need to know a good combination of heads and cams. so far i have come up with a comp cam xtreme energy flat tappet with my E7s and a 351 H.O. i pulled out of an old crown vic in a junk yard. Please help.... Im wanting to make 350-400hp
 
The only "HO" 5.8 built is the one out of a lightning or cobra mustang and even it was a turd. You aren't going to make 400 naturally aspirated horsepower on any factory ford head, period. You could of course spend a couple days porting a set of e7's, have them cut for 1.94/1.6 valves and decked but you would still have iron heads that flow what a stock low end edelbrock head flows and with low compression. Might as well find a set of gt40's. Is this going to be carbureted? The cam and heads you're talking about depending on intake might make 325 or so.

Buy a supercharger.

:edit: This is in the wrong section too...
 
Well the valve covers say 351 H.O its a old crown vic from like 83 or 84 and im going to put either a holley 750dp or an eldelbronck to the same effect. H.O. basically was a GT package for anything that wasnt a mustang. Even some trucks had them. It also was a roller motor versus the regular old flat tappet. I remember this old car because it use to belong to our fire department and this thing will scoot. Ive read up on them and I believe they did have the gt-40 heads along with a 4150 series holley 4bbl on them.
 
I hate to sound like a dick but that motor is nothing special. If it is really from an 80's anything that isn't a boat...it isn't a roller block and it doesn't have gt40 heads. It might have been 4bbl from the factory but every engine ford put out in the early to late 80's was a giant turd. Do more research. Or better yet pull the valve covers.
 
Want 375-400 horses in a SBF? I have a nasty balanced, professionally assembled, high compression roller 306 short block I'd let go for way less than you can build it for...
Just add a good set of heads and let her eat.
 
braxton357 said:
I hate to sound like a dick but that motor is nothing special. If it is really from an 80's anything that isn't a boat...it isn't a roller block and it doesn't have gt40 heads. It might have been 4bbl from the factory but every engine ford put out in the early to late 80's was a giant turd. Do more research. Or better yet pull the valve covers.
Click to expand...
This. Get a late model roller block and gt40's. Or if weight is not an issue and money is, go 460 with 750cfm carb, headers, cam, medium rise intake, and an improved ignition. Should be a cheap roughly 400 horses.
 
braxton357 said:
I hate to sound like a dick but that motor is nothing special. If it is really from an 80's anything that isn't a boat...it isn't a roller block and it doesn't have gt40 heads. It might have been 4bbl from the factory but every engine ford put out in the early to late 80's was a giant turd. Do more research. Or better yet pull the valve covers.
Click to expand...

Even the Lightning motor (with GT40 heads and a flat tappet cam) was only good for like 240 horse. The 4bbl HO motors were like 210.

96-97 production motors are the only OEM-equipped roller blocks.
 
My old 85 Ford Bronco had a 351 'HO' motor in it. I think it had slightly better heads, a different cam, a little higher compression, and a Holley 4bbl from the factory. Like Shawn said, I think it made 210 compared to the stock 160hp 351 hence why it was designated 'HO'. Detroit V8's were pathetically low powered from about the mid 70's to mid/late 80's. I don't know what the manufacturers were thinking. It was like they gave up on trying to make any power when unleaded fuel came out and the EPA tightened up on pollution.

You could stroke the 351 to a 408.
http://www.rpmmachine.com/ford-351w-408-stroker.shtml
 
go 460 and not look back get an early model with d0ve heads and add a cam and easily make 400hp and 500tq, or i have a 521 bbf stroker that i will make you a deal in. its pump gas friendly 550hp and 600tq
 
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