I'm thinking of running a X cam in my truck with the gear ratio being 3.55 and it being a manual I should be able to compensate for the stall. Also when I say HO cam I mean I'm putting a custom cam with the 351w firing order.

 

Gotcha...........anytime i see H.O. i automatically think stock mustang roller.....customs the way to go but costly...........X might be a bit much with stock P's and exploder intake...intake signs off around 5500 or so as do the heads...also 3.55 with a 31 is not much "gear", at least to me...i know the Od is crappy in that trans but a 4.10 might make it feel better, i actually wish i had gone 4.56 with my 235/75-15's but i worry about performance lol, its just a compromise running a 302 in a heavy vehicle........and i assume you are doing a MAF swap?

 

Ya I plan on a maf swap and I want to run a mega squirt computer as well to hopefully get a little better tune then stock. What type of cam does everyone recommend for low end tq and I only say that about the gear ratio because when I was looking thru the lunati book we have at work there were only a few cams that recommended more than a 3.55 gear.(I work at o'Reilly's)

 

There's a member on here hasn't been on in forever, but I actually know him 894fseries. He is a friend of mine and pointed me to FTE. He ran the aluminum y303 frpp heads and x cam with a fully ported truck intake.
On the street 33s it wouldn't get out of its own way till we put 4.56s in it. In low it was fine but was on the rev limiter before the camshaft was done. If you run this you def need a aftermarket chip or megasquirt setup. This was with the automatic the five speed may help. Just a perspective from actual experience. His was maf too.

 

He ever try any other intake? I'm trying the explorer within the next few weeks just so i can ice the intake between passes.........damn van has no room between the stock upper intake and cowl......be curious how it stacks up to the truck intake stock for stock at the track............

Thomps.........saw the megasquirt in your mod list......short memory lol..........

 

No truck didn't stick around that long. We did a SAS and tried different exhaist long tibes vs short. But in the end it lost an oil gauge line and the headers lit it up in a mud hole.

 

Thats a bummer..................i've got a set of bbk mustang longtubes i plan on squeezing in to try myself.....always picked up some over shorties on my mustangs..........

 

It did run MUCH better with long tubes, but the SAS had no room for them

 

Post #7 Conanski gave a part number. I haven't been on here forever but long enough to know that he knows his stuff I'd go with it

 

Thanks will do

 

Your biggest problem is going to be the pistons. (I have a 89 Towncar engine in my truck.) The piston in the middle is your standard truck/HO style piston with 4 valve reliefs. The ones on the side is the flattop with dish piston used on the SO or standard out put 302.

Cast Piston - Individual; Cast; .9122" Pin Dia.; 2 Rings: 1.50mm Groove; 1 Ring: 4.00mm Groove; 1.598 CD; Recessed Head .050 deep x 2.500 dia. - 8.9:1 C.R.

Bigger valve heads can hit the pistons with out flycutting them. I have read on some of the lincoln forums some have had luck running the gt40 head with the stock cam only. Or using a HO cam and using the stock heads.

Mine has the stock cam in it for now and is converted to a carb. I am looking at dropping some early 1966 289 heads I have ported on it. That way I can keep the valves smaller and drop in the HO cam I have or just use the 1.7 cobra RR I have on top and get a nice bump up in compression as well.

This is also a change over time for ford and your block maybe/or may not be a Roller block.

Your engine stock is showing 150hp and 270 lbs of torque. (unless it had the tow package (dual exhaust) then it is 160/280) The cam is made for pulling the heavy lincoln around. The stock exhaust on that car really killed the HP it could of made. I know the intake, headers and 2.5" exhaust I have put on mine have really helped it out. The stock EFI intake that year also will choke the engine down some.

I think I can dig up the stock cam specs if you need it. I have a lot of stuff saved on these engines.

 

Sorry for the late response I have been doing a ton of research on the subject and wanted to know if anyone has had any luck running gt40p heads with the cam mentioned above. Also I have a buddy that has a full gasket kit including pistons that I'm going to pick up to throw the motor together and also using the intake of an 01 explorer I found one in the yard that has a complete engine in and was going to pull the heads and intake. Has anyone used this combo also before people go to the fit for headers subject I've got the part number for Ford racing headers that will fit. I also have a buddy that I'm going to talk to about machining the heads and redo them with kit for the cam above. Thanks again guys

The cam is Comp 35-512-8

 

You will have problems if you change the cam with the GT40 heads because of the pistons. I have seen a few say they were fine, others weren't so lucky because of the non valve relief pistons. (but if you change the pistons you don't have to worry about that)

The stock HO cam and the stock E6 head or E7 heads will be fine as well.

If you can get the short block from the explorer for a good price get that whole set up.

86 Standard out put 302
8.9 CR, E6 Heads (1.78/1.46 valves), Should have a roller camshaft but that was still a swap over year for ford so there are some that do and others that don't. The cam spec for the Standard out put 302 is .237/.247 lift (x 1.6 Rocker ratio = .379/3.95 lift) 244/256 on duration has the old 289/302 firing order

The explorer engine
9.2 CR, GT40 heads 1.84/1.46 or 1.54 valves, Roller cam F4TE-6250-BA
256 / 266 186 / 197 0.422 / 0.448 116 LSA, 351/Ho firing order


Stock HO cam .278/.278 lift (x1.6 Rocker ratio = .444/.444) 276/266 duration and 351/HO firing order.

The cam you asked about.
35-512-8 / XE258HR-14
lift .480/.480
duration 258/264


If you used a 1.7 roller rocker and not the standard 1.6 roller rockers the above cams become

Standard output 5.0 lift .402/419

Explorer lift .448/476

HO lift .472/.472

I see you listed pistons in your gasket kit, are these the ones with the 4 valve reliefs?

 

I'm not sure because I haven't looked at the kit yet. Also at the yard there is an explorer with gt40 heads and a couple with gt40p heads. I know the p heads with give me a little higher compression because of the smaller combustion chamber but which would be better for the torque setup? Also does anyone know if the wire harness for the f150 eec-iv will work with the newer explorer intake or would I be better off doing a maf conversion on a f150 intake? A lot of people say the f150 intakes flow very well.
Thanks again

 

If you want to run any combos I have dyno 2003 and it wouldn't take much to give you a estimate. (just remember 2003 hp numbers some time run a little high, but the cure on the hp/torque relationship is correct)

On the intakes years ago a cut and welded truck intake was a hot setup. They put a larger/different throttle body on them with custom efi before there were a lot of custom after market intakes.

5.0HO, 5.0 Truck, and 5.8 Truck

http://farm4.static.flickr.com/3315/...8eb7d7.jpg?v=0

As you can see the middle 5.0 truck intake ports are much larger in diameter you would just have to see what you can find throttle body wise. I think the Explorer lower is like the HO lower and will make more HP at the cost of Less torque.

On the GT-40 heads I think you would be better off with a set of the standard 3 bar. Wouldn't have the spark plug angle and header problem, a lift over .444 on a P will give you trouble with the valve spring with higher than stock cam.

The flow on the GT-40 heads are about the same on flow so that isn't a issue.

With the GT40 head compression will be about the same, with the P head compression will be bumped up around .3 depending on the piston.

I haven't done much EFI work so I am not sure on the harness and computer.