Expert Assistance Needed

[P72Ford]

Alright, so you may have read my thread in OTBS about my decision regarding my future automobile. If not, then you can read it later (or not...).

If I choose to upgrade the CV, I have a slew of questions. Since this forum deals mostly with injected cars, I need some knowledge that I can't find in the archives.

My plan is: EDL 3783 (EGR intake), EDL 8053, EDL 1406, and necessary LOKAR equipment to mate the 4 bbl carb and the AOD. In addition to this, I'd like to further upgrade the performance of the engine (as I've been advised the intake/ carb won't offer a whole lot).

I know a head swap would be my best bet, but is there something else I can do? Mercracer mentioned 1.7 RR's in another thread. Would I be better off swapping the heads, or going with the 1.7 RR's? What would net the most bang for the buck?

If I swap the heads, I'd like to go GT40P, even though I'd no longer be able to retain the thermactor crap. I have some head swap questions:

#1.) If I obtain GT40P's and have them done (or buy them done), will I need to have the head bolt holes opened up for use on the 351? I thought the 351 used larger head bolts than the 302, but I can't be for sure.

#2.) Will GT40P's allow me to retain EGR?

#3.) Are E7's a viable option for a slight increase in power (ported or unported)?

#4.) Can I get a link for Thumper Performance..... I can't seem to find them online.

My last question involves LOKAR part #'s. I know I was told that since my '90 has a cable TV setup, I don't have to go LOKAR, but I want to do it anyway. Do I need to buy the throttle cable too? The kickdown is KD2aodHT, but do I also need SRK 4000, and the throttle cable?

Also, whats the deal with the throttle cable install? Does it play nice, or is it a PITA?

Oohh, a final question. The EGR plate: anyone kbnow if I can use a Mustanmg 4V HO plate on the Edelbrock manifold? I think I can, but when I look at pictures of the Edelbrock plate in comparison with the stock plate, the channels in the underside look different. I have tried the Edel. tech dept, and they leave alot to be desired. It took 2 wks for them to respond to my questions about the difference between EDL 1400, and 1406.

I know guys, lots of question, but I could use some help on these. Please answer any and all that you can.

[86VickyLX]

#1.) If I obtain GT40P's and have them done (or buy them done), will I need to have the head bolt holes opened up for use on the 351? I thought the 351 used larger head bolts than the 351, but I can't be for sure.

what? Do you the mean larger head bolts than the 302?

[P72Ford]

what? Do you the mean larger head bolts than the 302?

FIXED.

[Mercracer]

#1.) If I obtain GT40P's and have them done (or buy them done), will I need to have the head bolt holes opened up for use on the 351? I thought the 351 used larger head bolts than the 302, but I can't be for sure.

#2.) Will GT40P's allow me to retain EGR?

Oohh, a final question. The EGR plate: anyone kbnow if I can use a Mustanmg 4V HO plate on the Edelbrock manifold? .

Yes.... You need the holes opened up to 1/2". Don't touch the heads (porting or polishing) , just bolt them up if they are fresh...

The heads don't effect EGR.

The factory EGR plate is different than the Edelbrock plate.....

[P72Ford]

Can I use my EGR valve on the Edelbrock one, or do I have to buy one for a mustang? Mine mounts in the intake behind the carb.

[Tiggie]

http://thumperoforangepark.com/

Others probably know better than me, but word has it that stock E7TE's are worth 20-25hp more peak than E6SE. Just guessing, using stock E7TE's you'd probably get 10-15 at least over your E5AE's, but that's just a guess.

[Tiggie]

I think you'll see a pretty nice difference over the stock intake/carb using the Edelbrock parts you have listed. I swapped a Weiand Stealth and 600cfm Holley for a stock C5OE intake and Autolite 4100 480cfm on a stock 289. The difference was very noticeable off idle on up. The Weiand and Holley definitly pulled better.

[cld783]

http://thumperoforangepark.com/

Others probably know better than me, but word has it that stock E7TE's are worth 20-25hp more peak than E6SE. Just guessing, using stock E7TE's you'd probably get 10-15 at least over your E5AE's, but that's just a guess.

realistically its about 10-15 hp with a loss of low end torque over e6se.. the 200 - 225 hp ratings from the years 86-87 was a combination of heads, bigger 60mm throttlebody and slight changes in cam.

[mrltd]

We used a ford EGR plate from something with an old Performer intake...

[gadget73]

1) 302 uses a 7/16" bolt, the 351 uses 1/2". I've heard it said that the P heads have 1/2" holes already, and some say they don't. Its real easy to find out, just measure the hole. If the bigger bolt fits, use it. If not, have the holes drilled out at a machine shop. It should be a pretty cheap bit of work.

2) yes, assuming your intake manifold is compatible. The egr passage is in the middle of the head, aka the heat riser passage for a non-smog carb car. There are no thermactor passages, but I believe the small bolt holes are there, so you should be able to bolt up the old thermactor plumbing for visual inspection.

3) The stock heads on a 351 are probably the E5 casting, which aren't quite as bad as the E6. Basically the E5 is fairly similar to the E7, but with a larger combustion chamber. An E7 would give you a bump in compression for a bit more performance. No way to verify this, but I'd bet the flow figures are similar. Chamber on the E5 is supposed to be 69cc, an E7 is like 62cc.


throttle cable is pretty simple. remove the stock one, and install the Lokar. The top of the gas pedal has a slot and a larger round hole where the cable sort of clips in with this plastic bushing/grommet bit. Retain the plastic piece and use the new throttle cable. Its got this double nut type thing at the firewall, it just feeds through where the stock cable went and you put the other nut on from the engine bay side. It sounds far more complicated than it really is.

[Mercracer]

1) 302 uses a 7/16" bolt, the 351 uses 1/2". I've heard it said that the P heads have 1/2" holes already, and some say they don't. Its real easy to find out, just measure the hole. If the bigger bolt fits, use it. If not, have the holes drilled out at a machine shop. It should be a pretty cheap bit of work.

You heard wrong. Why even post that? GT40 Explorer heads are 1/2". GT-P heads are 7/16". GT-P heads were not used for anything but Explorer 302 motors. There fore Ford had no reason to produce any with the 351W sized 1/2" bolt holes. GT40 heads were used on 351W boat motors and then the Lightning pickups. They were sold through the SVO catalog and then FRPP. The Explorer versions were standard large chambers and Mustang Cobra only heads were machined down to a ~60-63CC chamber

[torquelover]

My stock throttle cable bolts right up to my EDEL carb and intake manifold. It's a little tight on the wiper motor box, but works fine. Do you have a good pic of your stock linkage, to verify ours are the same?

[P72Ford]

I think I'm getting conflicting information here from Mercracer and gadget. Do the heads affect the EGR, or not? I want the EGR to be functional, not just for visual inspection. Do the heads have to have thermactor passages to have a working EGR? Or, are the thermactor passages just for the smog pump, and unrelated to EGR?

[Lincolnmania]

no the heads do not effect the egr......the 96 and some 97 explorers and mountaneers and the gen 1 ford lightning and the 93 mustang cobra have internal egr.......the air injection holes in the back of the heads is not egr related, they are part of the thermactor system

[P72Ford]

no the heads do not effect the egr......the 96 and some 97 explorers and mountaneers and the gen 1 ford lightning and the 93 mustang cobra have internal egr.......the air injection holes in the back of the heads is not egr related, they are part of the thermactor system

Thanks Scott. According to what I've read on Thumpers web page, their ported E7's can outflow stock GT40 heads. Plus, the E7's would allow me to retain the thermactor passages and everything. But, those heads a 600, w/a $100 core (I have no E7 cores), and I'd have shipping. Thats pretty steep; I'm getting into the territory where aftermarket heads would be the way to go.

I see a set of ford SVO heads on Ebay right now for 530. With shipping like 600... Can I use my rockers on the E7's?