heads

[i_love_my_stang]

i have a 94 GT and i know the heads off a cobra will fit my car and that their an improvment, so i called the parts store in my town and they have E6 or E7 heads which one is the cobra one and what would the stock ones off the GT b? thanks for the help

 

[hollywoodstang]

E6 or E7 heads are both GT heads which you already have. Cobra heads are named GT40 heads. So those parts store heads are same as what you already have. You are going to have very hard time finding GT40 heads new. You can find GT40P heads which are exploer heads. the true cobra heads discontinued long time ago but you can find GT40P heads re-manufactured every where.

 

[hollywoodstang]

Try e-bay. They have some for sale. But they are asking way too much...

 

[MuscleMustang95]

how much of an improvement over stock E7 Heads is the GT-40P heads?

 

[Stopsign32v]

Not worth wasting your time looking for them. That is if you want to have a fast car...

 

[hollywoodstang]

This issue has been talked through over and over again...GT40 or GT40P heads are not a bad heads at all. Specially if you are on a budget. And with good combination you will see 300hp. I have pair of GT40 heads i am sending it in to machine shop to get it cleaned up and i don't know what else after...may be valve job and call it a day. Pair of explorer intake wouldn't hurt either. Noticeable power gain from stock.

If you want to go real fast then there is no limit...

 

[MuscleMustang95]

yea I was just curious because I found a real nice pair on ebay for 600 buy it now price. I think I will stick with getting some AFR 165's

 

[hollywoodstang]

600 for iron heads are way too much anyways... :crazy2:

 

[Stopsign32v]

yea I was just curious because I found a real nice pair on ebay for 600 buy it now price. I think I will stick with getting some AFR 165's

Skip the 165 heads and go straight for the 185s and notch your pistons. Trust me you will thank me later!

 

[Stangbangin]

Contrary to the belief that you NEED aftermarket heads to go fast is a misnomer. I used to whoop guys asses that had afr heaed cars when I had my gt40p combo. I say if you can find some gt40's cheap like 300 or cheaper in good working condition that needs no machine work then go for it. Its not worth spending to get them cleaned up and all that. I say all this as I have tfs fully ported heads not that outflow gt40's out of the box. BUt I put down over 300 to the wheels with my combo (typhoon, comp xe270 cam, and gt40p's) A gt40p headed car with a GOOD driver will hang with a aluminum headed car with a so so driver. SO those of you who will say that you NEED to get aftermarket heads are fucking stupid. But its not a bad idea.

 

[Stopsign32v]

Contrary to the belief that you NEED aftermarket heads to go fast is a misnomer. I used to whoop guys asses that had afr heaed cars when I had my gt40p combo. I say if you can find some gt40's cheap like 300 or cheaper in good working condition that needs no machine work then go for it. Its not worth spending to get them cleaned up and all that. I say all this as I have tfs fully ported heads not that outflow gt40's out of the box. BUt I put down over 300 to the wheels with my combo (typhoon, comp xe270 cam, and gt40p's) A gt40p headed car with a GOOD driver will hang with a aluminum headed car with a so so driver. SO those of you who will say that you NEED to get aftermarket heads are ******* stupid. But its not a bad idea.

What numbers did your car make n/a with the combination you just listed? Was it on a stock uncut piston 302? And are you saying it made that with unported heads and intake? Because if you say yes to the last two questions you are full of shit, period. And if you are saying you made that with a 306 then that is pathetic to have barely over 300rwhp.

 

[MuscleMustang95]

do you need a machine shop to get pistons notched or do you do it yourself?

 

[zero_chance]

If you google gt40P heads youll find some very interesting results and numbers as compared to other heads. A lot of true blue Ford fans like sticking with the Ps and a gt 40 intake to keep it all blue oval. To each his own.

 

[Stopsign32v]

do you need a machine shop to get pistons notched or do you do it yourself?

I've heard that you can do it yourself however I would not. If you want to try call Brian at TEA http://www.totalengineairflow.com/ 330-634-2155 he has done it with the motor in the car and could give some pointers. Or if you get Mike on the phone tell him Kevin sent you and ask him if he can help you. All the guys there are super nice and willing to help!
If you don't want to I know it sounds like a pain in the ass but pull the motor out and take it to have the pistons notched. Most places you talk to say they can do it with the motor in the car but its kinda hard getting your car there and THEN taking it apart. Its a piece of cake getting the motor out. 2 bolts hold the motor mounts to the car and one bolt holds the cross member to the tranny. And out she comes! Its very easy and after you get the 185s and a RPMII intake or something that size you will be happy. Please don't listen to these guys that say you can make your car fast with untouched GT40P heads because its all BS.

 

[hollywoodstang]

I have seen 306ci gt40 heads(unported) and gt40(unported) intake put down average 355 hp and 386.9 torque and 380hp and 411tq. No Bull crap! How do they do it? i have no clue. BUT i know for sure they start from bare block, Everything new and light crank, piston, rockers, bleh bleh bleh...But it's money pit to do that. But it sure will surprise lot of supercharged 4.6 owners. :crazy2:

 

[Stopsign32v]

I have seen 306ci gt40 heads(unported) and gt40(unported) intake put down average 355 hp and 386.9 torque and 380hp and 411tq. No Bull crap! How do they do it? i have no clue. BUT i know for sure they start from bare block, Everything new and light crank, piston, rockers, bleh bleh bleh...But it's money pit to do that. But it sure will surprise lot of supercharged 4.6 owners. :crazy2:

Post these combos because mild 331/347 combos are around 350-370rwhp. So how is a 306cid untouched GT40 heads and GT40 intake going to make that power on a 306?

Here are some good examples all taken from one website...

This is a 306 with AFR heads, a honed Cobra intake, and a N61 cam. It made 344rwhp and 360rwtq through a T5.

And here is a good example of a combination that you COULD run on the street but wouldn't want to everyday.

It is a 306 with Twisted Wedge Stage 3 port job done to them, a Trickflow Track Heat stage 5 port work done to it, and a N91 camshaft. With this combination he should be shifting somewhere around 7,000rpms-7,400rpms. He runs 4.56 gears in the rear... He made 376rwhp and 335rwtq

So to say that you can make 355-380rwhp through a set of untouched pos GT40 heads and intake on a 306 is just stupid and you should stop giving false hope to people. You have to spend money to go fast. If everyone could just go buy some GT40 heads and intake and slap them on and have 300-380rwhp don't you think that would be the only combination for a 302-306 you would see? Give me a damn break...

 

[Paul]

I want a stage 10 port job. That would be awesome.

 

[Stopsign32v]

I want a stage 10 port job. That would be awesome.

:rollinglaugh: I wonder what the highest stage ever!? :hammer:

 

[hollywoodstang]

I am not trying to give false hope. It has been done. just stating the fact. Of course you can spend 10K to make it go fast and you have to spend money to go fast. 350 hp at engine dyno all day. I am just saying it is possible with time and effort and streetable.

You shouldn't be so upset about this fact. The way people modify cars are different. You have your way and they have their way. Some people are just smarter then others notice the facts. and take the cheaper harder route to make horsepower.

Here is the combo:

306ci

scat steel crank
scat rods
CP pistons
propower bearings
Total seal rings
dynagear adjustable timing chain with torrington bearing
ford racing lifters
canton oil pan
Clutch masters aluminum flywheel
Clutch masters stage 1 clutch
Propower double valve springs
10 degree keepers
titanium retainers
cobra intake Upper and lower (unported)
1.7 yella terra rockers (shaft mount)
aeromotive fuel rails
aeromotive external fuel pump
30lb injectors
Holly 70 mm throttle body
pro m 75mm
anderson ford power pipe
AWSF-32c motorcraft plugs
Holly annihilator wires
Anderson ford 1 3/4 headers
Magnaflow magnapack exhaust
Tune

Talk to ya'll later

 

[hollywoodstang]

AND of course GT40 iron heads with valve job :hammer: