i might be needing a new one, and i need one that puts out more fuel. my modifications are in the signature. does anone have an idea of what size i need?

also, i want to get the kind that just sits in your engine bay, hooks to the regulator, and has a hose all the way back to the tank. its called something like straight line, or straight something..... where can i find this?

 

bump

 

i have never seen that kind of fuel pump.

 

i guess just most aftermarket fuel pumps are like it...


and that is the funniest avatar i have ever seen, please tell me it isnt real though...

 

no its not real. its my car edited

 

Sounds like you are looking for one that they used to put on old school cars. But then again maybe not. Was that the oil pump that sat on the passenger side at the front bottom of the 350 or not? I don't remember now.

 

never heard of the kind of pump you referred to, but if you don't have any luck finding that type, then ... any one of THESE do the trick with the appropriate regulator, of course.

 

An electric wont last in the engine bay. Itll work too hard pulling fuel that far from the tank. Your best option is a rear mounted pump.

 

Does inline pump ring a bell? Those are pumps that are attached to the line outside of the tank. The other option is an in-tank pump, which lives in the gas tank on the fuel float.

As for your specific application you want to be sure to get a pump designed for carbureted applications. Something like these: Holley, Carter and Edelbrock make them too . Ask your dealer or mfgr if these will work in the engine bay before you buy. An EFI pump will work, but it puts out a lot more pressure than you need. Unless you get an adjustable pump (esentially one that has an internal regulator), you will need a regulator. Again you need to get one matched to your fuel pump and carb.

What you're talking about on the old muscle motors is a mecahnical fuel pump. Something like this: http://www.jegs.com/photos/51012-327-11.jpg . On the back of the pump is a little arm and inside the engine is another arm on the end of the cam (I think, its been a while) that moves the arm on the pump each time it goes round.

These are ok for low pressure (carb), low volume (non-race) applications. Your rotary lacks something to diddle the pump arm with.

 

Yes, thats it! The mecahnical pump is what I thought he ment. Didn't think it would do on a rotary. Anyways I remembered something bout it anyways. I am soooo old my memory is running low......need a new stick!

 

so what size or power pump do i need to get? ive just got the mods in my signature up top. thats with the carburated 13b

 

Carter, Holley blue and a bunch of others would be fine. Here comes the arguements! mar3

 

lol....indeed...if you want a noisy, old-tech electric fuel pump with a pulsing fuel delivery, then help yourself to the cheapie Holleys and any Carter pump. If you want a rock-solid, quiet fuel delivery and gerotor technology, then a Mallory Comp110 should do the job with a regulator. If you turbo, SC, or nitrous the 13B, give serious thought to the Mallory Comp140. If it can feed 574 cid Pontiacs kicking out 650+ hp, it can handle ANY 13B rotary application.

The Beasts in Question...

 

how much do mallorys cost? ive got a holley regulator

 

Depends completely on where and what condition the fuel pump is bought. Brand new, it's gonna run around $160 for the Comp110 and $240 for the Comp140...but you're buying these once...if you eBay it, you might score it a lot cheaper...they are rebuildable on top of that. Look for about $50 for a used Comp110, but that may have just been my luck at the time...

 

You could also run a Walbro inline fuel pump. For an NA I'd recommend the 190 lph pump and if you go turbo use a 255 lph pump--they are the same size and price. Inline fuel pump link has them.

Bigger is not always better. If you oversize the pump you may have to upgrade your fuel pressure regulator to be able to bypass the extra flow.

All the FC's are FI so you need a high pressure pump. Don't forget to upgrade the fuel filter while you're at it--the carbed fuel filter will not handle the pressure.

HTH,

Scott

 

Walbro, Carter, same pump, Besides he's carbed. I don't think it will handle the pressure, 95 psi shut off.

 

Whoops, my bad, yea a carb won't handle that pressure.