'98 explorer intake? +, recognizing gt40 cars?

[BerniniCaCO3]

Hi!

There's a guy on craigslist who has a '98 explorer intake, throttle body, fuel injectors and accessories, and also a cold air intake for $100.

I've already found an HO intake.

Any benefit to the explorer over HO in the intake? AND-- for '98, will it accommodate the external EGR (still need to pass emissions!) and the tv cable, or would I be wasting my time?
Cold air is nice, but don't want to spend $100 on all that crap if it's not better; I'd rather just by the intake alone if I can't use the '98 explorer intake. I have some use for the fuel rails + spider insofar as I could fully assemble my new engine and drop it in more quickly and not have to swap that stuff off of my old one.

Let me know.


Secondly, if I tour a couple junkyards tomorrow, how do I recognize a 1995, '96, or early model '97 --I think those are the years-- that would have a gt40 head?
Ridiculous prices on ebay.... just crazy. I like the $80 the junkyard charges.

[gadget73]

If you're going to an HO or Explorer motor, yes. The Explorer piece flows significantly better. If you're staying with a stock motor, then I suspect its not worth the trouble.

98 probably does not have internal egr passages. Get pictures. Its easy to tell if its compatible or not. If its EGR capable, there will be 9 holes in both the upper and lower where the two bolt together. If its got 8 holes and a big space in the middle its not the kind you need.


GT40 heads have a GT cast on the corner of the head. rear lower corner if I remember right. GT40P heads say GTP.

[BerniniCaCO3]

excellent, sounds like a deal. It means I'll have the parts to turn my old lopo motor into an HO also once I've swapped
Hell no, not spending all this work and leaving it stock lopo. The HO parts are costing me...$120 total?

I'll double check that it does not have the internal egr before handing over cash. Was it regarding the internal egr, that I remember reading on this forum once about having to bore and tap a hole for the egr...?


And tv cable is NOT a problem, will go right on?


No, I was wondering how to recognize a '96 explorer at all. I guess the model year might be on the inside door though. Is the gt cast on the outside, or will I have to remove the head first to know?



-Bernard

[gadget73]

if emissions is a concern, you need internal egr. You could go external and add a connection for it on the exhaust though.

The ACT is what needs the hole drilled and tapped. The earlier intakes will have the flat boss already cast into the intake where it needs to be drilled. If the boss isn't there, its probably not the best idea to try and add the sensor to the intake.

you have to swap the lever on the throttle body to your stock one. Once thats done, the mechanical connections on the throttle body will be totally identical to what it is now.

Check the emissions label under the hood. Most of the time it will say what model year emissions standard the vehicle conforms to.

[BerniniCaCO3]

oh-- I thought we had the external egr on our cars?
I might have been misinformed or misinterpreted... I don't even remember when/where I read that.

I do still need to pass emissions.

[BerniniCaCO3]

Aw shit, found another forum thread addressing my concern: I'm screwed if I want the egr, with these '98 heads.
Well, part of the rear system was rusting through anyway and I would have had to replace it...

Three questions:
1) I learned that EGR keeps combustion temperatures below 2000F (generally @1800) to limit NOx. I'd previously thought that it recirculated exhaust just to reburn it... will I lose any fuel economy if I take it off?
2) I live in MD fwiw. I need to pass emissions again in 1.5 yrs. Maybe I can just find the egr heads at that time Or, can I pass even without egr? What if I retard the timing, that old trick? Has anyone else passed w/o egr?
3) Any other dangers? Will combustion temperatures now be hot enough to risk burning valves or anything, will the computer be puzzled that it seems to have lost its egr appendage, or any other concerns with simply removing egr?

[86VickyLX]

No, internal EGR. '96 or '97 is what you need. If you can get your eyes in there, the heads on the sides say P if they're P heads. If you pull off the valve cover, you'll see a GTP if GT40P or just GT if GT40.

'96 and '97 use same shape TPS. So you can swap your TPS from your lopo throttle body to the explorer.

You'll need a Lightning EGR spacer for the EGR to work properly, or have someone/you make a bracket to attach your stock throttle bracket to a bored out Mustang spacer. Lopo spacers won't be able to be bored that much and sealed.

If you find a Lightning 351w lightning egr spacer, you can attach your stock throttle bracket, and your EGR valve as well. You'll need to swap the throttle linkages from your lopo throttle body to the explorer throttle body. This can be done a few ways. Either way you have to grind the tab off the bottom of the linkage, so you can pull the lever bracket off. Grind it level with the lever. Then lightly tap the lever off with a hammer, being careful not to damage the lever. Once it's free do the same with your other throttle body. Place your lopo lever on the explorer throttle body.

You can either weld the lever to your throttle body (I wouldn't recommend it unless you're really good and really quick, so you don't melt the bushing). Or you can drill and tap for a small bolt and washer to hold the lever on. I did this because I didn't have the time to have Lincolnmania swap the levers for me.
I put locktite on the bolt, and it works like it originally had that lever. My TV cable lines right up, my Throttle cable lines right up. It's all good.

As for the GT40 intake, it would be best if you had the boss for the IAT drilled and tapped in cylinder 5's runner. Like the stock lopo and the mustang. You can move it to the air box, but it'll give you codes and make things run a little weird.

Watch the upper intakes too. Some of them for the PCV line have a water inlet and outlet. 2 pipes that wrap around the actual PCV line.







EDIT
Heads are the same it's the intakes that determine if you have no internal EGR.

All GT40P heads that I have seen have egr ports in the heads. '96 and '97s have the egr ports in the intakes.

[pantera77]

As long as the computer sees the EGR as just doing nothing it doesn't care. Just leave the electrical portion hooked up and the vacuum line off it and it will be fine. If you need to pass a visual, just put something in the line so it doesn't actually do anything.

If it gets tailpipe tested I have no idea if it would pass or not though.

I've ran with the EGR on and off my wagon many different times due to it having off the line issues. Performance wise it really doesn't make a difference, and contrary to popular belief, I noticed no change in gas mileage with it hooked up or left off either.

[1990LTD]

I've ran with the EGR on and off my wagon many different times due to it having off the line issues. Performance wise it really doesn't make a difference, and contrary to popular belief, I noticed no change in gas mileage with it hooked up or left off either.

+1 in my sedan. My off-idle hesitation went away with the EGR valve disconnected. YMMV

[91waggin]

If you have to pass a tailpipe sniffer test, you will more than likely need properly functioning EGR. Without it, your NOx will be way too high.