The Vette I just bought was converted to carb. As part of the purchase, I received the manifold, TBIs and air cleaner assembly.

Is there anything else that would have be changed?

I appreciate any help you can provide.

I was going to convert back this winter, after getting the intake ported and such, but may have to do that sooner.

 

As long as you've still got the wiring harness, you should be good.

I suggest you get that intake ported very well, or you'd be better off sticking with the carb. It's easier and cheaper to make power with a carb as opposed to FI, since there are overall less parts. Think of injectors, chip tunes when you modify, bigger/bored TBs, sensors, etc. for FI, and a carb is just tweaking and rejetting. Before you decide on switching back, just take off the carb and see what's wrong with it. If you can't idle, you may have a problem with the primaries or the choke linkage.

 

Yeh, I know. That was part of my plan for the winter. But I think my carb crapped out. (Have another thread going on that.) So, I may need to do sooner rather than later.

 

why not buy a TPI and upgrade since you are going to have it all apart?
Y me has a harness, I have the manifolding and injectors, someone else has the ECM, MAF and throttle body, someone else has the rest of the sensors, and it's basically a bolt-in for $500-600 bucks

 

Go TPI !

 

Can someone detail exactly what is needed to go TPI? i.e. a BOM. That would make it a lot easier for me to see if it would be feasable to do so.

Any thoughs on what my TBIs and manifolds would be worth? (I know the the carb one is a wildcard, it is an Edlebrock though. I will find the part number of it.) I may be able to (mostly) fund the TBI convert with the sale of the items I currently have.

 

manifold, runners, plenum,TPI distributor,throttle body, brake booster tube, distributor cover,
Iac, TPS, IAT, Mat, CTS, Cold start injector, EGR, injectors, fuel rail, FPR, MAF, Maf relay, MAF burnoff relay, fan fan relay, harness, MAF duct, gaskets, water outlet, fuel pump relay, fuel injection fuel pump, charcoal cannister, vacuum relays, vacuum hose, vacuum check valve, EGR solenoid, O ring kit, dual fuel lines and high pressure fuel filter.
other than that, elbow grease and a nite light.

just be sure you buy complete, and everything is cheaper. when you get a harness, make sure the seller sells you an un molested harness.
There are a lot more go fast parts for a TPI engine than a CFI engine, and it's widely accepted that if you want to upgrade to a different style intake, all your sensors and computer is totally adaptable to LT-1 manifold, super ram, etc. I am sure that you will love the extra torque that you get with the TPI, and the hugely available parts from auto zone, checker, o'reilly's etc. and probably everyone on the forum has some left over TPI stuff as well. They just made more of them in camaros and corvettes than CFI. CFI was good as a carb alternative when it was new, but the next step up in fuel metering was the TPI, TPI was superceeded by LT-1, but there was a major engine change when LT-1 was implemented, so it's not practical. Sure CFI has fewer parts. but hey, TPI was the next step up. why not bolt on and go? I know there are guys with 84's that have high mileage, and there are 84's that have 35,000 miles, same with TPI. My TPI has 143,000 miles on it. I have taken it all apart for a cleaning 5 years ago, and it's still blasting down the freeway. starts and runs every day. CFI folks can say the same, but it was the first generation fuel injection, and the TPI was second generation, somewhat refined.

 

Good luck

Corvette Mike

 

carbs suck,but you better know what your doing if the last guy pulled all the realated wiring and relays and such your in for some serious work.and the learning curve is expensive.

 

Oh here we go... the great CFI to TPI debate. Going to TPI is a complete WASTE of your money for the amount of gain your gonna get. Do the searches and read the threads

If your gonna go back to the CFI set up you'll need the HEI distributer as well.
As recommended above port your intake. That alone will give you more power than the TPI conversion. Oh... less money too!

 

 

Okay, first question is what are your skills? If all you have is a carb issue, then its easiest to pull the carb, take it in and worse case have someone rebuild it. Reinstall it and viola, you be driving.
Next quesion is: are emissions an issue? That will decide real quick if you have to go back to EFI.
Last: Why? if you have a car that runs fine and all you want is performance then put the money into heads, exhaust and all those normal things. I'm here to tell ya, all those little sensors and connectors add up real quick. And when someone tells you they'll sell you a used wiring harness, beware of how old it is. If you worked on a car for more than five minutes you've had one of those lovely's come apart on ya. Then try to find a new one, aint that fun.
Last question: What do you want to do? do you want original? Do you want high gas mileage? Do you want to set your hair on fire (BBC would be a blast and they fit)? LS2 or later is a sweet deal and reasonable mileage. How much money you got? Thats the big one. If mama wants a couch, and you want fuel injection, well....
Best of luck. Let us know what you decide. By the way, Carb or EFI both make power.

 

cfi to MAF/TPI to much work. have your cfi harness re-pinned and a couple wires added and run speed density TPI