head question

[BULLITTSTANG95]

can someone tell me the differences between a e5 and a e7 head? combustion chamber and valve size difference if any. i also need to know if they are ok to use on my 95gt. thanks in advance

 

[BULLITTSTANG95]

ok so here is what i have dug up ....e5 69cc cumbustion chamber vs 64cc e7 but i still need to know if they are ok to use with 95gt someone please help me

 

[CManT1914]

I think E7's are what came stock on 94/95 GT's. Not sure about E5's.

 

[BULLITTSTANG95]

e7's did come stock on a 95 i am just wondering the difference between the 2 cause i just picked up a set of e5's for cheap. i am wanting to know if they will work on our cars cause if so i am going to p&p them and get a valve job done on them to install on my new motor when i build it

 

[CManT1914]

e7's did come stock on a 95 i am just wondering the difference between the 2 cause i just picked up a set of e5's for cheap. i am wanting to know if they will work on our cars cause if so i am going to p&p them and get a valve job done on them to install on my new motor when i build it

Oh I guess I misunderstood your question. I thought you were asking if either head would work. I don't know what the E5's are, sorry buddy. Free bump for ya though

 

[jasonlee0704]

E5s came on 1985 Mustang GTs. For reference, the 85s were rated at 210 flywheel HP with a carb setup.

E6s were the 5.0L HO head to avoid. Ford did some emissions tweaks to the castings that ended up costing 10 HP.

 

[SeventyMach1]

I've been doing some research on different heads in the last week (which sucks, cause' I just found out my head aren't "P's"). I haven't seen or heard of many people using the E5's.... and I've seen nothing on them as far as flow charts or valve sizes.

One's things for sure, though.... if it was me, I'd find a way to steepen compression with those things.... whether by piston choice or milling them. Unless you're planning for some boost.... 69cc seems a bit much.

 

[CManT1914]

I've been doing some research on different heads in the last week (which sucks, cause' I just found out my head aren't "P's"). I haven't seen or heard of many people using the E5's.... and I've seen nothing on them as far as flow charts or valve sizes.

One's things for sure, though.... if it was me, I'd find a way to steepen compression with those things.... whether by piston choice or milling them. Unless you're planning for some boost.... 69cc seems a bit much.

Decreasing combustion chamber size doesn't do much for compression though. I think every cc of size decrease is worth about .1 compression ratio, i.e.: going from 69cc combustion chamber with 9.5 compression ratio to a 59cc combustion chamber will bump it to 10.5. Not to say that's not a nice difference, but I think it'd be easier to do with some domed pistons or something like that. I could be wrong though (wouldn't be the first time).

But you're right, I rarely see anybody try to do anything performance wise with E7's, and I've never seen anybody do anything with E5's. There's just really no point.

 

[BULLITTSTANG95]

still looking for answers please help