head swap question
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Laughing Gas
Joined: Dec 2003
Posts: 1,062
Likes: 12
From: Ford, WA
head swap question
i have an 86 302HO motor (# E6SE) will the E7 heads fit on this motor? or will the valves hit the flat-top pistons? or should i just keep the E6SE heads?
I was told when I got the motor that it was an'88.. wish i would've known how to to decipher the casting #'s then.. are the 86 HO's any good? i know they have less power than the 87/88 (200 hp vs. 225 hp) would the E7 heads give it that extra 25hp? the only differences i can tell between 86 and 87/88 are the pistons and heads.
thanks for the quick reply
I was told when I got the motor that it was an'88.. wish i would've known how to to decipher the casting #'s then.. are the 86 HO's any good? i know they have less power than the 87/88 (200 hp vs. 225 hp) would the E7 heads give it that extra 25hp? the only differences i can tell between 86 and 87/88 are the pistons and heads.
thanks for the quick reply
Lead Driver
Joined: Sep 2003
Posts: 7,018
Likes: 210
From: SoCal
The E7 heads should fit onto the 86 block. The 87 HO engine also has a slightly higher lift cam, but it's probably not going to interfere with the piston (you should check if you're going to try the install). The 87 HO also has a slightly different intake manifold, and a bigger throttle body. The difference is more than the 25HP; there was also the increase in torque. To get all that, you would also need the later EEC computer.
Thread Starter
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Laughing Gas
Joined: Dec 2003
Posts: 1,062
Likes: 12
From: Ford, WA
when i get the heads i will check it out..hopefully the valves won't hit the pistons..the E6 heads I have now have some bad rust in a few of the ports(see thread "water in 302")i figured why waste time cleaning these up when i could install better ones.. i was also thinking of doing a little port work with a dremel..how much lower is the torque on the 86 motor? i have the intake, but not the plenum, and the motor is tore apart at the moment..so changing intakes or even the cam shouldn't be a problem..should i use a truck style intake or the 5.0HO/mustang style? as for the computer, i will look for the 87/88+..i will have to use the mustang wiring harness too right? i plan on putting this in my 82 F100 pickup.
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
E7 heads are a direct swap on this motor, yes they are an upgrade and no they won't cause P-V clearance problems. The truck intake flows better than any of the factory car style intakes so it's a good choice as long as you have room under the hood for it, an '89-92 mustang EEC, MAF meter, and wiring harness would be the ultimate setup for this, there are several companies that make complete aftermarket wiring harnesses for this combo too. RJM Injection Tech 5.0L Universal Harness
