GT40 intake conversion

[SigEpBlue]

Originally Posted by KyleQ

You guys talk about the 351 lowers being crap - is this one of them? I can't find much on the part numbers - one source says it is a 95' Cobra R lower...

That's a 1993-1995 Lightning lower. The giveaway is the heater fitting.

The factory truck 5.8L intake is pretty restricted, especially on anything that'll flow more than the factory setup, i.e. better heads and exhaust.

[broncoflorida]

Originally Posted by 46079bronco

95 cobra Rs had a 351 as the only motor option so if thats what it is then yes, it'll fit a 351.

but with a f3 part number it dont sound like one but it is a gt-40 style lower either way.

My lighting lower has a F3 part #.

[KyleQ]

With a set of heads with a 2"+ exhaust valve and hooker super comp headers - worth it to port the lower intake?
People just open up the intake to match the port sizing on the heads or what?

[plug ugly]

finally got some time to work on my swap. Ended up using a a lightening lower for a 351, 1/2" FMS spacer, an explorer upper with internal EGR, a 70MM mustang EGR plate, 65 mm explorer elbow and plugged the external EGR port, 65mm Explorer TB, and modded a explorer bracket. The throttle cable has a semi significant bend to it, but it doesnt seem to cause an drag on the throttle cable. The cable also clears the headers well.

++++++++++
I do have a few questions though, for the tech write up section unfortunately, but hopefully others will gain from it also. Does the TPS and BAP need to be oriented in a certain direction, or are the reversible??????? Can I reuse the bronco TPS since it has a pig tail on it, and hooks up to my Speed density wiring plug, as the explorer one does not.

[broncoflorida]

I just answer your question in the other forum. Not sure as to what a BAP is , but if that's in reference to a MAP sensor, than your original should work, just find a vacuum source and route it to the MAP. EGR valave connectors on my FSB , connects to either Stang or Exp EGR control valve. TPS in my case was from a FSB iirc or maybe mustang now that I'm thinking about it. I didn't even bother with the exp due to the plug pins and iirc the bolt spacing.

Everything imho is a direct fit. I as stated before used mustangs EGR spacer and TB and turned the upper around like that of a lighting. All of the explorer airtrack and elbow was not used.

[broncoflorida]

Also now that we see your photos does the stock wiring harness reaches the IAC plug. Mine did not and is even tight with it facing the firewall mounted on a stang TB connected to a stang EGR adapter. I still would like to see how your planning on hooking up that throttle linkage. The lighting or stang bracket would be a simpler install.

Then next , how do you plan on running the air tube/filter into the now TB point towards the front ? And where/how do you secure the air filter and any ductwork ? if you turned it back to the driver side splash wall, that's another turn and you made thing way much harder than what it should be imho.

[roofdog]

ive been looking at this a few times and have thought bout doing this, i have a ford xploder intake sitting here. now is there a loss in low end torque.

[broncoflorida]

Originally Posted by roofdog

ive been looking at this a few times and have thought bout doing this, i have a ford xploder intake sitting here. now is there a loss in low end torque.

Not in mine. It feels much better and mpg went up by .3mpg.

[roofdog]

milage went up by 3. well thats enough for me to justify doing the swap.

[plug ugly]

Originally Posted by broncoflorida

Also now that we see your photos does the stock wiring harness reaches the IAC plug. .

dont know yet, but Ill make it work

Originally Posted by broncoflorida

I still would like to see how your planning on hooking up that throttle linkage. The lighting or stang bracket would be a simpler install. .

its on in the pictures.

Originally Posted by broncoflorida

Then next , how do you plan on running the air tube/filter into the now TB point towards the front ? And where/how do you secure the air filter and any ductwork ? if you turned it back to the driver side splash wall, that's another turn and you made thing way much harder than what it should be imho.

Im gonna run it on the pass side, I have hydro boost, extra electrical and a battery all crammed on the drivers side. Im using a stock explorer elbow to make the turn.

[broncoflorida]

Originally Posted by roofdog

milage went up by 3. well thats enough for me to justify doing the swap.

Let me correct you as in .3 or in 3/10 of a mile per gallon. Not a lot but every grain of sand helps If I got a complete 3mpg improvement, I would be snatching up heads and intakes and selling them on the forum. Right now I'm about 1.8 mpg shy of what ford claimed in the explorer stock ( 18/20 mpg iirc )

that 3/10 could be from multiple factors ( head gasket, newer style plugs, clean injectors, etc...) So I'm not counting it being just the intake combo.

At some point in time, I'm going to bench on a dyn. I just have to get a dyno shop that will allow for a 4x4 and have ceiling heigh to fit into the door and opening.

I have a few places here , but they never dyno a truck nor 4x4 and are kinda crowd, some place even freak out still with me offering to remove the front driveshaft. Some how they they we are AWD or something

[SigEpBlue]

I'm getting 14/18 right now, not being nice to it. I haven't even tweaked the HO2S tables much, only the exhaust pulse delay values to reflect the changes in the exhaust system. The cold weather has put a dent in the numbers I was getting during the summer, but not nearly as bad as having those exhaust pulse delay table values unaltered.

I can't wait to finish my dual wideband PCB and software, and then use THAT to get the a/f ratio exactly where I want it every time.


Looks like there would be plenty of room for a turbo on the passenger side, and now that you're routing the air box over there.... What kind of tubing are you going to use? I was a cheap resourceful bastage and used Schedule 30 PVC.

[plug ugly]

Ill prolly use muffler pipe, so I can weld a mount onto it.

[broncoflorida]

PlugUgly

If you want one of the explorer elbow that doesn't have the hole for the EGR, I have a few laying around. They are slightly more heavier than the cast external egr elbow.

Just pay for shipping and it's all yours.

[plug ugly]

thanks for the offer. do you have a pic of one by chance? Just curious if its a slimmer design, or same over all dimensions.

[broncoflorida]

the one on the right

[broncoflorida]

btw with this one, the EGR mount on the elbow and no need for the EGR that you have installed.

[plug ugly]

is that an internal EGR? If so, yes I would like it. Let me know how much and I can send some money.

EDIT: you beat me too it or something. Anyway, yeah, that would be great, and one less piece I need to fit in there.

[broncoflorida]

Originally Posted by plug ugly

is that an internal EGR? If so, yes I would like it. Let me know how much and I can send some money.

EDIT: you beat me too it or something. Anyway, yeah, that would be great, and one less piece I need to fit in there.

I have about 3 maybe 4 of theses, no money required, just pay for shipping.

send me a PM

But yes that's the factory elbow for the explorer/mountaineer. Typically the one you have, ( the one you see in the left side of that photo ), are used on the later years and the GT40Ps heads but you will find GT40 heads with intakes that used this.


fwiw I never found a GT40P using internal EGR elbow, some still used internal EGR passages manifolds, but the EGR was always piped into the elbow for some reason.

I looked at use that same elbow at one time, but decided on not using it and stayed with the stang/lighting EGR spacer block. If I at some later date time rid myself of the internal EGR, I will swap both lower and upper to NON-egr type ,which was found on the last year Explorer/Mountaineer, I have 2 sets of these manifold at this time, both came off a 1999 Mountaineer

[plug ugly]

here are a few more pics for you florida.