gt-40 heads maybe help

[Bowman85merc]

well its one of my cousins freinds dad, my cousin had a bronco that the guy ported and put new everything in the heads for only $150 and the guy is a real engine builder that knows what he's doin, but ill have to call the guy

[gabegt90]

i ment to ask how much is it to get e7's or gt 40 heads ported?

[Nathan in MI]

Other thing to keep in mind is that GT40 heads have larger valves in them, so they've got an advantage right out of the box. The stock E7s will still have the pathetically small 1.78" intake and 1.46" exhaust valves, so even if you have them ported, keeping the stock valve size is going to be a hindrance, and it may be difficult to get them to flow as well as GT40s. The valve size can be changed, of course, but it's more money. If you can afford to do it, though, Dave (turbo2256b) claims that his buddy Gerry can make E7s out flow GT40s.

[mrltd]

Other thing to keep in mind is that GT40 heads have larger valves in them, so they've got an advantage right out of the box. The stock E7s will still have the pathetically small 1.78" intake and 1.46" exhaust valves, so even if you have them ported, keeping the stock valve size is going to be a hindrance, and it may be difficult to get them to flow as well as GT40s. The valve size can be changed, of course, but it's more money. If you can afford to do it, though, Dave (turbo2256b) claims that his buddy Gerry can make E7s out flow UNPORTED GT40s.

Fixed that for ya

[Bowman85merc]

lol yea i meant imma ask for myself how much he would do it for lol... but u think E7's would be good for now i think imma buy em if they're decent

[Nathan in MI]

Fixed that for ya

Yeah, I should've specified on that, my apologies. If I recall correctly, what Dave told me was that ported E7s would outflow stock GT40s, and that ported GT40s would flow about the same as the ported E7s, though I'm not sure if he had implied changing the valve size in the E7s or not. Also, I'm sure that the person doing the port work would affect the final results and which could out flow which. Hopefully Dave will come and toss his two cents in on this as well.

[87_crown_vic]

if you plan on getting your monies worth do it... if you are gonna upgrade again soon.. save your money and get better heads.. check out thumperoforangepark.com

[mrltd]

I'm gonna say that his are going to be somewhat of a rare find. They also cost twice as much as some used GT40's. They might flow a bit better, and depending on application, might be the better choice.

The real test is to have Mrlandyacht come to scottfest and race against my car. In thoery his car should completely lay waste to my wagon.

A 150 buck buddy doing the work isn't going to be nearly as good as Daves work.

A mildly ported e7 will work well. That's what I was essentially running on my 87 and it was pretty impressive.

[gadget73]

well, here's one thing to keep in mind. Having a set of E7 heads ported is probably going to be MORE expensive than just getting a set of GT40 heads. GT40p heads actually flow even better, and are usually cheaper because people are scared of the special headers, which honestly aren't that expensive. There are a whole lot less that fit, but Ford Racing makes a rather nice shorty header that fits them perfectly.

What kind of total budget do you have to work with here?

[87_crown_vic]

MrLandYacht wants to race my 2 door after it is built at SF also. be nice to see whos cars do what and such. i will have a dyno run on mine to figure out what it pushes out before SF.

[1987cp]

how much HP do you think it will give me with an offenhouse 360 intake and holly 650 cfm and would they be roller heads cuz mine isn't

Heads are interchangable from '77 or '78 up. Only thing special about them is provisions for pedestal-mount rockers, and D8's, E5's, E6's, E7's, GT40's, and GT40P's all have them, as well as many aftermarket offerings.

Stock E7 heads will suck with your Offy. You *need* to either buy a dual-plane or plan for high RPM.

[Mercracer]

Heads are interchangable from '77 or '78 up. Only thing special about them is provisions for pedestal-mount rockers, and D8's, E5's, E6's, E7's, GT40's, and GT40P's all have them, as well as many aftermarket offerings.

Stock E7 heads will suck with your Offy. You *need* to either buy a dual-plane or plan for high RPM.

Offy 360 works fine at low RPMs. Professionally built E7 heads can support pver 300HP unported with a factory HO cam.
A 1969 302 head isn't any less interchangeable than a E7 302 head is. They all bolt on and can use the same intake and exhaust manifolds. A different rocker arm configuration does not change interchangeability. The different chamber sizes will effect your motor though.

[Lincolnmania]

smaller valves are better for torque......if i didnt have heads and it was 2 bills for some rebuilt e7's or 400 for used gt40's i'd go with the e7's

[1987cp]

Offy 360 works fine at low RPMs.

:shrugs: ... sucked pretty bad on my car ...... swapping in the dual-plane felt like adding 100 cubic inches by comparison.

[Tiggie]

A 1969 302 head isn't any less interchangeable than a E7 302 head is.

Gotta watch out for rail vs non-rail vs pedestal mount rocker arm differences if you are dealing with stock assembled heads. Mix and match and you risk funky geometry and a dropped valve.