Hey guys..just reading through some old exhaust posts and now I have some questions. The engine km putting the split efi manifolds onto is an 85 going into a 68 f100. I won't have it computerized obviously and was wondering what the eve pipe is..if it is necessary to have..and what ill need to do the exhaust swap thanks

 

Sorry..that is supposed to be egr pipe

 

That's the EGR pipe for the stock setup.



That's the EGR pipe for the EFI manifolds. (It's wrapped in heat insulation, which is why it looks funny.)



You can see the EGR spacer underneath the carb in this picture. It has the large silver canister on the end of it. It sits underneath the carb and extends forward.



This picture shows where a 100% custom pipe would need to be fitted to connect the EFI manifolds to the carb'd EGR spacer.



It's an emissions oriented thing, but it's also one that is healthy for an engine and can have positive benefits like increased gas mileage.

Your carb, however, if it's a 68 is probably tuned for NOT having one, so it would be something you'd ADD to your engine and is not necessary at all. It's just be something you'd do if you wanted to.

 

Well..the engine as a whole is from an 85 and double checking engine codes is verified that it is an 85 engine. The carburetor and everything is too. Just the truck is a 68. Now..if I were to take the old egr off..put the dual efi exhaust on..with some bending would the egr pipe use the same bolts? Cuz if I can just reuse the old one I will.

 

The carburetor is from an '85? Is it a feedback carburetor? (Solenoids, etc. attached to the side).
If so, you'll want to seek out a duraspark era carburetor or it won't run right since its computer controlled.

Is the ignition from an '85 as well?



I don't think you'd be able to rebend that pipe without breaking it, but if you could, there's no reason you shouldn't be able to reuse it. Might have an easier time bending a new pipe and then putting new ends onto it.

 

Well it does have all the solenoids on it..here's the life story of the engine haha...it was in a guys 85 Ford..he took it out and dropped it into a 70 f100 that then was bought by my best friends family. It ran perfectly until they swapped it out for a 302 that they custom built. My 360 Fe blew and now my friend is selling me this engine for 250$. It wasn't computerized in the 70 the only thing it does have is the electric instead of manuals choke like my truck had..so it should work nonetheless. The engine is in his shop..where my truck is also..and I see it about twice a week. Maybe if I get a torch is be able to bend it easier..Idk. will the threads work for the nuts already on the egr?

 

The ignition is on my 68 but again..it was in a 70 truck before and it had all the same things mine did w/o problems.

 

Sounds like the engine's been around the block a little bit.

The reason I ask about the carb and ignition is because if it's from an '85, it'll work, but it won't work very well. If you have a non-feedback ignition, that helps a lot, but the carb is still set by the computer. It was the "early days" of EFI, so to speak. If you put it on your engine, it'll run, but it won't be the best since there's no computer there to set it right.
Granted, if you're just putting it on until you get a 4bbl intake/setup, then I wouldn't worry about it too much.

 

Yes..yes it has. When my friend drove it..it had no issues with anything...I have to put a new gasket set on the carburetor anyways or possibly look at getting another carburetor. But..again..this same carburetor ran great in my friends 70. Who knows..since I'm going through all this hassle anyways..If I can find a decent priced offy then ill put the ole carburetor from the 360 I had and call it done haha ...speaking of which..does the offy systems have egr systems?

 

The point I'm making with that carburetor is not that it'll have issues, but that it's not going to run as well as a non-feedback carburetor. It may run without issues, but it's not going to be the best option. It's designed to have a computer telling it what to do.

Just a heads up.

And no, the Offenhauser doesn't have any EGR provisions at all. People have made them, but it's a bit of custom work and machining.

 

I get what your saying and thanks for the heads up! I figure with the time and money that will have to be put in..I.e. the egr..carburetor rebuild..etc..I went ahead and ordered an off c intake..and ill run the old carburetor I had on the 360 plus I won't have to worry about egr and I can plug the holes and I was going to have to make the heat bracket Anyhoo..so..as for miss so far I'm lookin at an offy intake and efi manifolds. Hopefully it performs and breaths a little better!

 

If it doesn't, something's definitely wrong!

That should wake that motor right up. You'll have to give your buddy a ride in it when it's done so he can see what he was missing.

 

Definitely!