GT-40P Head question.

[oo-gonzo]

I found some GT-40 P heads from a 97 Ford Explorer 5.0. I was wondering if $250 for the set was a good price? If purchased, I would like to upgrade the springs and what nots, mabye have'em ported and polished. Would this be worth it? I can't afford to buy a new set of heads right now, so I am going the cheap thrill route. What's your opinion?

BTW, Will be putting them on my 87 GT.

[CrazyInBlack]

that price sounds good to me but I have only been looking at 5.0 parts for a while

but I would imagine that everyone is going to tell you that you should do the H/C/I at one time

maybe a GT-40 intake and a letter cam

[QWKSNKE]

Are you going to port and polish them yourself? If you are planning on hiring it out it is very expensive especially with cast iron heads.

Just bolt them on and do a cam change and run it

[oo-gonzo]

Lee, What about a spring upgrade on them, cause I cannot do the port and polish job. Also, Will these require different headers?

[QWKSNKE]

Definitly do a spring upgrade. It is requirement if you stick any aftermarket cam in the motor.

There is a header issue but I cannot remember which ones will work or not work

[CrazyInBlack]

I am pretty sure it will require different headers

i think 96 is the only year that did not since they are GT-40s and not Ps

[oo-gonzo]

What springs and cam do you recommend?

[CrazyInBlack]

I am not the person to ask (if you were asking me)

I would wait for Lee, Brian, or Matt to chime in

it might help to know the plan for the car, street/strip, DD, n2o, ect

[slvrbullit]

The header issue is that you have to have "P" specific shorties, but long tubes are no issues.

[QWKSNKE]

What springs and cam do you recommend?

Trickflow offers an OEM replacement spring that Summit carries for around $120

Cam to go with those heads would probably be FRPP 'b' , 'e', or the TFS stage 1 cam. Anything beyond that would be a waste because those heads stop flowing at .500 lift. Also, any of those cams would work best with 3.73's out back

[03slobra]

Before you can do a whole lot you need to convert it to mass air,in my opinion.

[QWKSNKE]

Before you can do a whole lot you need to convert it to mass air,in my opinion.

:doh: I didn't catch that it was a pre-mass car until I re-read his post.

Yes Craig, Preston is right. You need a MAF conversion

[oo-gonzo]

WOW! Thanks guy's!

[rj95svt]

Like already said you need to do the mass air conversion first if your going to swap cams. The speed density cam is a little more aggresive than the 89 and later cams and you could do a head and intake swap without jumping to mass air from what I understand but I would go ahead and swap to mass air and install a cam as well. The GT40p's will require some special header due to spark plug angles. Some people clearence there current headers to allow enogh clearence to get by for a while. The GT40p's will be much better than your current E7's. The trick flow spring upgrade would be a good choice. I would also try to find a used cobra or possibly a explorer intake (nearly the same) while I was doing the swap. As far as cams go I'm not a huge fan of letter cams but I've had decent luck with a B303 before. I would personally go with the trick flow stage 1 or the crower 15511 like I'm gonna use in my GT40 cobra combo.

[QWKSNKE]

or better yet a carburetor conversion

:shake:

[97cobrasvt]

:agree: :shake: :shake:

[oo-gonzo]

Whats the head shaking for? Is that a bad thing or what? Do you disagree? I want to do whats best, but also on a budget. At this point I think I am going to just spend a little time and money making the car look good. I can do that pretty easy. I can wait and hopefully find that 351w that I want.

[CrazyInBlack]

Whats the head shaking for? Is that a bad thing or what? Do you disagree? I want to do whats best, but also on a budget. At this point I think I am going to just spend a little time and money making the car look good. I can do that pretty easy. I can wait and hopefully find that 351w that I want.

no point to go to a carb, they make injectors that will flow however much you need

[QWKSNKE]

no point to go to a carb, they make injectors that will flow however much you need

+1...

[CrazyInBlack]

+1...

WHOLY CRAP LEE JUST +1ed me

I am a NOOB no more :banana:

[oo-gonzo]

:think: :think: Sorry, but I'm completely lost now! What do you recommend for an 87 GT w/ a 90 5.0 motor (speed density). The mas conversion is pretty expensive, but what else is there?

[CrazyInBlack]

it is not that expensive if you piece it together yourself

I think mine is under $150

[QWKSNKE]

You really can't do a whole lot until you convert to mass air. Like Spence said you can get the stuff priced reasonable if you just sit tight watch for the parts to come up. Crazyinblack can probably also pinpoint you to the directions on how to do it

[oo-gonzo]

Thanks!

[EHardy1971]

I am pretty sure it will require different headers

i think 96 is the only year that did not since they are GT-40s and not Ps
after may 97 they went to the P's,and the intakes also changed as well.The later intakes have no EGR port in them,the early ones do. I have also heard that you can run your regular headers,but you have to use Chevy style 90 degree plug boots

[EHardy1971]

You really can't do a whole lot until you convert to mass air. Like Spence said you can get the stuff priced reasonable if you just sit tight watch for the parts to come up. Crazyinblack can probably also pinpoint you to the directions on how to do it

I can copy the printout for you that I have on how to convert SD to MAF,you don't even need another harness,just the MAF meter,the electrical pigtail for it,and a MAF ECU!:metal:

[oo-gonzo]

Cool! Thanks!