302 heads
Thread Starter
|
Junior User
Joined: Oct 2008
Posts: 55
Likes: 0
302 heads
I have a 1993 F150 with a 302. i want to upgrade to the GT 40 heads.
what year do the heads need to be and off what vehicle and can i use my intake that i have now or do i also have to get a diferent intake.
Thanks
JC
what year do the heads need to be and off what vehicle and can i use my intake that i have now or do i also have to get a diferent intake.
Thanks
JC
Fleet Owner
Joined: Oct 2005
Posts: 20,789
Likes: 1,753
From: Kentucky
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
Heads are a definite uprade but you'll get far more gain from a cam change since the stock bumpstick is nowhere near big enough to fully utilize the flow potential of even the stock heads.
Thread Starter
|
Junior User
Joined: Oct 2008
Posts: 55
Likes: 0
I am also getting a mild cam. just concern if i can use my stock intake manifold with the GT heads
I am also trying to understand the diference between the GT and the GTP.
If i use the GT head i can use my stock intake? what about the GTP? or which head is better for my application.
Thanks
JC
I am also trying to understand the diference between the GT and the GTP.
If i use the GT head i can use my stock intake? what about the GTP? or which head is better for my application.
Thanks
JC
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
The P heads actually perform better but they have a radical spark plug angle that makes fitting headers difficult so the regular GT40s are recommended. The stock truck intake will work with these and any other SBF head no problem.
As for the cam you can't throw just anything in the motor it has to be SD EFI compatable, I suggest the Comp 35-512-8 since you have a roller motor there.
As for the cam you can't throw just anything in the motor it has to be SD EFI compatable, I suggest the Comp 35-512-8 since you have a roller motor there.
Fleet Owner
Joined: Oct 2005
Posts: 20,789
Likes: 1,753
From: Kentucky
Make sure you budget for an aftermarket y-pipe/high-flow converter or some other exhaust changes in your plans. The factory y-pipe/converters are well known bottlenecks.
Trending Topics
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
BTW.. GT40 heads were found on Gen1 5.8 Lightnings, '93-95 Cobra 5.0 Mustang, and '96-97.5 Explorer 5.0. GT40p heads appeared on '97.5-2000 Explorer/Mountaineer 5.0 only.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
That cam is good too, it will put the powerband a little higher up than the one I suggested but it's not far from the one I have(XE264HR) and that produces good power once the rpms are up.
Thread Starter
|
Junior User
Joined: Oct 2008
Posts: 55
Likes: 0
Finally, I found a rebuilt set of GT40 heads at a machine shop. I check the casting to make sure they were GT. The truck is in the shop now. I am excited, any ideas of what kind of Hp/Tq gains with this set up? I have replaced the exhaust a while back and removed one cat.
GT40 heads and a cam
Thanks for the help and info
GT40 heads and a cam
Thanks for the help and info
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
Have you driven the truck with that cam yet? If yes then you will see some power gains across the board from the heads, hard to say how much but it should be noticable.
If however you are going from a stock motor to one with the heads and cam then you're in for a quite a surprise.
If however you are going from a stock motor to one with the heads and cam then you're in for a quite a surprise.
Thread Starter
|
Junior User
Joined: Oct 2008
Posts: 55
Likes: 0
Conanski, the GT40 heads that i got, I wasnt able to use. my mechanic said, it werent pollution heads and in other words he said the heads were to old for my set up. I am confuse. He also mention that if I wanted that he can get me a set of heads from an older model Lightning, 1992 and up and stated that these heads are better than the older GT40 heads. would these heads fit? what about my Intake, would it fit too.
JC
JC
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
What are the casting numbers off your heads? The only way they would be unusable is if they are vintage heads from the '60's or 70's, those don't have hardened valve seats and won't last with unleaded gas. The Gen1 Lightning had GT40 heads on it.. the same as what I though you had, and they probably won't have "smog ports" at the back either but that's no big deal just remove the smog system(air injection) from your truck if you don't need to do emission tests.
Thread Starter
|
Junior User
Joined: Oct 2008
Posts: 55
Likes: 0
yes, hed did mention that the heads were old from like the 70's. he also said the heads his getting from the lightning have the smog system.
just concern if the intake would fit.
I didnt know that the lightning also had GT heads.
just concern if the intake would fit.
I didnt know that the lightning also had GT heads.