I have a stock 86 Camaro IROC Z with 305 TPI. I want to swap over to carb and remove the comp and maf completely and i want all the emissions gone. I have a couple questions too.
1) What intake manifold would be best (egr valve or no?) I already have a holley 650 double pump carb.
2) How to remove the comp, maf and all the emissions.
I already looked at all the other fourms and i didnt find any info that i was looking for so thanks alot for helping me out.

 

Start at the thirdgen.org homepage. There are links in the left margin, one of them for "Technical Articles". There is a tech article in there on converting from EFI to carb. It is also linked in the "welcome to the carburetor forum" sticky in the top section of this forum.

Basically, it's removing the EFI equipment and harnessing (you don't have to cut anything) and putting on the carb stuff. You will need to do something about fuel supply, TPI has an in-tank electric pump. Removing the ECM will disable the pump. If someone tells you all you need to do is put on an engine-mounted mechanical pump, don't believe them. It might run, but it won't properly supply the engine. A better approach is to power the pump and use a return-style pressure regulator.

The intake manifold needs to match the rest of your combination - cam, torque converter stall, rear end gears. Most likely something like an Edelbrock Performer would be the best choice.

Since you have a TH700R-4, you will need a geometry corrector bracket for the TV cable which mounts to the throttle arm. You will also need to provide some means of locking up the torque converter clutch under cruise conditions. Failing to do either of these two steps will mean certain death for your transmission.

Personally, I think this is a stupid move unless you are building a track-only car. And, I use the word advisedly. The loss is greater than the gain for a street driven car. And, doing this is illegal in all 50 of the United States for a street driven car.

But, if that's the way you want to go, that's what you need to do. It ain't cheap, and driveability and fuel economy will suffer compared to a properly operating TPI system.

 

Thanks alot i have a couple other ?s so please bare with me.
1)How do I lock up the torque converter clutch?
2)I was looking at the preformer rpm air gap non egr Will this intake be good?
3)"A better approach is to power the pump and use a return-style pressure regulator" how to and where to buy it?
4) Is there any rewire of anything that i have to do?
5) When i remove all my emissions and ecm the fuel problem is the only thing i have to fix?

 

Sticky in the top section of this forum: https://www.thirdgen.org/forums/carb...c-control.html

The Performer RPM is a good intake when you have upgraded cam and torque converter. Not much help if you haven't.

Search on "mallory 4309". That's the most common by-pass type reg used, and there will be threads that talk about wiring up the pump.

 

Is that all the basic stuff i need to know and that i need to buy in order for this swap to go as smooth as possible?
And if i get a new torque converter will i still have fix the lockup problem?

 

Read through the tech article.

A non-lock-up torque converter doesn't solve the problem. The transmission has to be modified for non-lock-up. Much simpler and cheaper to provide for lock-up.

 

I thought about using the mallary fuel regulator and i wanted to know if i drop the tank and take out the old fuel pump will i be able to put a mechanical pump in? I dont like the electric pumps. Is it possible to run a line straight to the mechanical fuel pump and place it on the block(is there room or a place to mount it?) and then put a regulator in, then run it straight to the carb?

 

I am also doing a swap for tpi to carb and i have a ?. I thought about using the mallary fuel regulator and i wanted to know if i drop the tank and take out the old fuel pump will i be able to put a mechanical pump in? I dont like the electric pumps. Is it possible to run a line straight to the mechanical fuel pump and place it on the block(is there room or a place to mount it?) and then put a regulator in, then run it straight to the carb?

 

I moved this to its own thread because it didn't belong in the sticky where you posted it.

Convert the pick-up as discussed in the sticky. A mechanical pump goes on the engine. The carb factory line goes up the engine compartment on the passenger side (because that's where the mechanical pump is). Your TPI line goes up the engine compartment on the driver's side, so you'll have to route the line over to the other side (I just took it across the front of the crossmember - V6 also goes up the driver's side). You don't need a regulator with a mechanical pump.

It would be better if you got over you bias against electric pumps. Highly superior to mechanical.

 

I see you asked the same question in two different threads. So, I've merged the posts into one thread.

 

Wow, all this hassle and issue and people still say converting to carb is easier than leaving it as TPI? Ok, if you say so.

 

This is true ONLY if you have a properly operating TPI. Since the TPI technology is 25 years old, If your tpi has not been maintained properly, the the trials of getting technology this old to work properly once again may be insurmountable. Given the discontinued parts, brittle wiring, and old ECM's, the task is daunting at best. Brittle vacuum tubing, wiring problems, and ecm programming are a few of the hurdles you have to get over. You can replace some items with upgraded materials, but be prepared for a TON of work to get it back to where it should be.

 

I just got done with a tbi to carb and it was hard to account for everything needed for the conversion.I would agree that a working tpi would definately be worth putting some time and energy into to get to work correctly. The conversion for me was part of a head and ignition change that at least made sense to me but it was very involved and get ready for a lot of hours in the garage. And thanks to some great people on this website it worked out for me. Good Luck.

Buzzman1

 

wow, Guys, seriously, just go to the Tech Article. and, really, I think the advantages of a TPI are WAY over and above a Carb... If you're going to do a carb, just hack a tbi, adn save that TPI for someone who wants it.... Don't ruin a good tpi system.
Sell the TPI motor, use that profit to buy an already carb'd 350, or something, and work with that...

 

ABSOLUTLY CORRECT

 

I am taking the whole engine apart because i bought it off some guy that had it sitting outside for like 5 years. But anyway i took off the old heads and i want to put new ones on and rods and roller rockers but i dont know what i should get any suggestions. I want power but dont really want to go over the $500 mark. And i have stock cams and and preformer rpm intake with holley 650 doublle pump. Any suggestions