Need a new fuel pump for my Iron Duke Camaro. It appears the pump is located on the fuel tank. After reading my Haynes manual for a while, the V-8 & V-6 pumps are located in the engine bay. I do plan on a V-8 swap sometime in the future. I understand that I must use V-8 fuel lines to complete the swap. My question is.......will I need to mount the fuel pump in the engine bay? Or can I leave the replacement in the fuel tank where it currently is during the engine swap. And also.....is a bigger pump needed to accomodate the V-8?

Thanks,
Brandon

 

Not all V6 and V8's had the fuel pump on the engine (which is really why they were in the engine bay). All fuel injected V6's and V8's have the fuel pump in the fuel tank (it's actually in it, not on it). In fact, at least in 1987, the carb'd V8's also had a pump in the fuel tank (as well as on the engine - two pumps).

I'm not sure what size fuel lines were used for the 4 cylinder cars, but my V6 car had a 3/8" line, the same as the V8 cars. That same line is now feeding my V8.

I would recommend you get a fuel pump for the V8 application now. Be aware that the TPI/SPFI applications use higher pressure than carb/TBI applications. When you do get a V8 in there, run a 3-port regulator to drop the fuel pressure down to about 5 psi, and use a mechanical pump on the engine as well. That is the "ideal" setup, even if Jester doesn't like in-tank electrical pumps. In that setup, the electric pump will push fuel from the tank to the mechanical pump, and the mechanical pump will push fuel up to the carb. Excess fuel provided by the electric pump will be routed back to the tank by the 3rd port of the regulator to keep the fuel being fed to the engine a little cooler.

 

What's a good fuel pump to buy and where?

Brandon

 

The concensis seems to be "use AC Delco in-tank pumps". I don't have 3rd gen experience there, but have two Bonnevilles and I've replaced both pumps - one with a "Pep Boys brand", the other an AC Delco I picked up from Checker. Without a doubt, the AC is the better part. And, getting it from Checker saved me about $80 (including the strainer in both prices), for the same parts the dealer was going to sell me, with a lifetime warranty vs. 1 year the dealer offered.

One thing I'm not clear about: Does your car have carb or TBI right now?

 

I don't necessarily believe that the V6 fuel pump is located in the engine bay.... I suppose it's possible, but THAT generation of the engine has the fuel pump in the tank.

The reason why they say the fuel pump is "In the engine bay" is because the fuel pump is literally built into the engine.... the fuel pump is Mechanical on all carbureted 3rd gen f-bodies.

What kind of swap are you doing?

Are you going to a Carbureted V8? Or are you going to a TBI/TPI V8?

If the V8 you're going with will most likely be carbureted.. then get a set of fuel lines and a "pick-up" from the junkyard off a carbureted V8.

BYPASS the mechanical fuel pump on the new V8 that you will be getting, and get yourself an aftermarket electronic fuel pump. You will want to mount this as CLOSE to the gas tank as possible. You would simply want to wire the fuel pump to your ignition.


Todd

 

Hey five7kid, I never thought of using both an electric fuel pump and a mechanical fuel pump. That will probably work pretty decent...

the electric pump of course would always overpower the mechanical fuel pump.

Todd

 

I would suggest the use of a relay and an oil pressure switch for anyone wiring up an electric pump.

 

five7kid......It's running TBI, for now. Was asking about the brand such as Edelbrock, etc. Want a "GOOD" one!

82-T/A [Work].....According to my Haynes manual, the fuel pump is located in the engine bay of the V-6 and V-8 cars. I believe the V-8's is supposedly bolted onto the engine block. About the swap.......was looking at a perfomance rebuild on the Iron Duke. But am not ready to give up on the V-8 swap. Would like to leave that option "open" for the time being. Not interested in switching fuel pump AGAIN during the V-8 swap, if I go through with it.

Brandon

 

84 Challange, I have that VERY same motor, the 2.5 liter Iron Duke in my 1984 Pontiac Fiero 2m4 SE WS6. It's quick in the Fiero... but even still, doing a performance rebuild on that motor is not worth it. You'll end up spending thousands of dollars, only to get the performance of what a STOCK 305 LG4 V8 would have.

The performance items are actually not even made anymore. Holley has an overstock of the Holley 2.5 TBI fuel injection unit, it's $375, I bought one for the Fiero and really like it.. but it's not worth the money. They no longer make that TBI anymore, but they still have some left in stock. You would also want to find a Holley 2.5 performance intake manifold, but they no longer make those anymore and you can't buy them from Holly, you'd have to check on eBay.. and they are RARE...

You can still get the "Hooker Header" from hooker, but I think it's made specifically for the Fiero if memory serves correct.

You could go the way of the SuperDuty-4 but most people replace the block as well when going to the SuperDuty-4 head.

Just hte HEAD for the SD-4 usually costs around a grand.. and that's used.... a new SD4 2.7 block can cost up to 15 grand!

Todd