Gt40 egr issues upper/lower

[mbinkley2]

Noob here to the forums but I’m trying... lol
I inherited a lot of 302 parts, motors (non ho and ho)heads, gt40 stuff and now I’m piecing it all together finally. I have a complete gt40 motor from a 2001 explorer that has no egr port on the lower intake but the freshly powder coated gt40 upper i have does have the egr passage. What’s a guy to do? If I slap the two together and don’t run the external egr crap will it be ok?

 

[Deleted member 215073]

You should find a lower with the internal EGR port.

 

[Mustang5L5]

Block off plate on the upper, or run the egr spacer that deletes the EGR.

But if you want to run the EGR stuff, find yourself a -BA lower.

 

[7991LXnSHO]

After you settle on the lower and EGR setup with matching parts,, consider having Todd Moss (Tmoss) port the lower intake.

 

[mbinkley2]

Block off plate on the upper, or run the egr spacer that deletes the EGR.

But if you want to run the EGR stuff, find yourself a -BA lower.

In your opinion, is there an advantage to running the egr? I was hoping it was as simple a block off plate. Thx for the advice

 

[Mustang5L5]

In your opinion, is there an advantage to running the egr? I was hoping it was as simple a block off plate. Thx for the advice

It's not so much advantage/disadvantage as it is ease of tuning your combo to run the best.

Highly modified engine running an aftermarket ECU? Delete. Stock a9x processor with simple HCI and a tune...someday? Might be best to keep the egr functional.

Of course plenty have deleted it without issue. Other questions to ask are do you need to pass a sniffer at all? Do you care much about fuel economy (egr helps with cruise fuel economy). You can also get a custom tune to remove it from the a9x logic


Let me put it another way. Ported Cobra gt40 intake, tfs170s, custom cam, a9l processor for my car..keeping the egr. If/when I go megasquirt...I will delete

 

[7991LXnSHO]

@Mustang5L5 thank you for your reasonable and well thought out answer. The only things I can add is to expand on the legal and stock computer issues.
If it is on the street, the pollution controls have to be there by Federal law. Just because no president has yet required enforcement in all states, all it would take is a bee in a President’s bonnet. With an executive order, every car with pollution controls, every state, all checked and fined if not right. It’s not likely to happen for the next two years, but it might happen.
Your stock computer is programmed to run with an EGR system, the Smog Pump and control valves. And although it will run without them, I am leaving all my smog stuff on to not throw codes and have a computer temper tantrum. (Besides, the cows and I like clean air.) Except for the cats themselves, it just is not that much weight on a street car. (And the high flow cats made my stereo work a lot better or the exhaust quieter.
Now if I get parts that make my car too high strung for a stock computer, anything not needed may then go on the shelf.

 

[mbinkley2]

Good info guys. I’m currently running antique auto tags so no sniffer test required. I don’t really care about gas mileage as of now because it’s a weekend cruiser and auto crosser as of now. It’s a very unorthodox build, I’m currently running a carbureted non HO motor in my 81 rx7 project but can’t wait to drop this efi gt40 motor in over the winter. I’ll post pictures if anyone wants to see.

 

[Mustang5L5]

Hell yeah post away

 

[7991LXnSHO]

Please post!
I wanted to build a monster Miata... until I sat in one and had the windshield frame in my way. The RX7 autocross car sounds like fun.

 

[mbinkley2]

Here you go guys, my buddies and me call it the frankenmazda 5.0 Like I said it’s just a non HO paired with a tremec t5. I have a 8.8 lsd/5 lug disc brake to go in it with the gt40 motor. I should be able to start the new build after the new year

 

[mbinkley2]

The hardest part I see with the whole swap is going to be the 3 link we’re going to build for the rear (non of us have ever attempted) but it should be a street monster when completed.