Thread: S10 V8 swap

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The fuel pressure of a TBI isn't that far off for a carb.Well really it is but not as bad as a CPI 4.3.Keep the in tank pump and get a regulator that has a return line on it and put a fuel pressure gauge in line under the hood to set the pressure.You use the 4.3 return line like it was on the 4.3.

You know just a thought.Your saying the engine came out of a EFI truck.Was that also a TBI??. With that you might have some other options.

Yes Gary, it was a TBI as well. I looked up the pressure specs and was surprized to see that it is only 9 to 13 psi. I figured it to be at least 30 psi. Makes me wonder if I even need a regulater, but it certainly can't hurt. I think that will be the way I go. But first, Gary, what other option did you have in mind?

Originally Posted by Bigbzc

Yes Gary, it was a TBI as well. I looked up the pressure specs and was surprized to see that it is only 9 to 13 psi. I figured it to be at least 30 psi. Makes me wonder if I even need a regulater, but it certainly can't hurt. I think that will be the way I go. But first, Gary, what other option did you have in mind?

Run the TBI V8 with the V8 ECU,the V8 harness or parts of the harness.

Originally Posted by 1gary

Run the TBI V8 with the V8 ECU,the V8 harness or parts of the harness.

Yeah that was my original plan for my 93 because of the transmission but this guy is pretty stuck on carburation. If it doesnt affect the shifting in the 93 I will probibly carb mine too but only because it will be cheaper

One other thing you need to know is the HEI dizzies are huge compared to one come a EFI system.So in-part of the s10 V8 swap your going to bang with a sizable hammer firewall clearance.More so with the HEI.Then to get them back out after the swap isn't a fun day.

Originally Posted by 1gary

One other thing you need to know is the HEI dizzies are huge compared to one come a EFI system.So in-part of the s10 V8 swap your going to bang with a sizable hammer firewall clearance.More so with the HEI.Then to get them back out after the swap isn't a fun day.

Gary could he use a small base HEI with a divorced coil with the TBI ? or are they even set up for an TBI..?

Originally Posted by 406Rich

Gary could he use a small base HEI with a divorced coil with the TBI ? or are they even set up for an TBI..?

The TBI's coil is already divorced but you can't use it with the carb engine. Only way I know of to put a smaller distributor is an old points style. Dont mind beating the hell out of the firewall anyway, it's good stress relief

Originally Posted by Bigbzc

Yes Gary, it was a TBI as well. I looked up the pressure specs and was surprized to see that it is only 9 to 13 psi. I figured it to be at least 30 psi. Makes me wonder if I even need a regulater, but it certainly can't hurt. I think that will be the way I go. But first, Gary, what other option did you have in mind?

You'll have to use the regulator as 9-13 pounds will be to much for "any" carb. Be sure and get a regulator with 3 ports (in,out & return) and set it for about 4 lbs.