My fuel pump is starting too **** up and wanted to know what kind of upgrades for the fuel pump i can get for my 1986 NA RX-7. I want to know if i need to get better injectors to get the better fuel pump.

 

no you dont need better injectors on an n/a. Maybe take them out and get them cleaned. As for the fuel pump, you dont really need to upgrade it, but rather get a NOS one.

 

I'd go with a Walboro pump

 

thats what i was going to say but its just a n/a without any fuel mods

 

alot of people will probly say stock pump on a N/A but im a fan of if your have to replace it might as well do it right and better. A walboro 255 or FD fuel pump. It will keep a great suply of fuel and the FPR will just return the unused fuel to the tank.

 

How do you KNOW it's the fuel pump???


-Ted

 

No, either of those pumps will result in increased fuel pressure and overly rich mixtures. The FPR cannot respond to increases in pump pressure. More pressure in = more pressure out. It only varies fuel pressure in line with manifold pressure.

The only upgrade worth considering would be a TII pump, but only if serious mods are planned. Most modded NA's don't reach the limit of the stock pump (or injectors).

 

Where is a good source for a stock replacement(besides dealership)? Mine has went to hell!

 

ive got a stock s4 t2 fuel pump that i dont need, pm me a price if you want it.

 

I'm with NZ, replace it with a stock NA pump or a TII pump.....anything more and it's overkill on an NA......

 

www.mazdatrix.com or the For SAle section

 

There's no reason for a walboro. I also would go any more than
a TII pump. I'm assuming you have no major mods, and the car
is completely stock.
Here are some listings:

http://cgi.ebay.com/ebaymotors/mazda...44625280QQrdZ1

http://cgi.ebay.com/ebaymotors/Mazda...43698209QQrdZ1

http://cgi.ebay.com/ebaymotors/Mazda...41780442QQrdZ1

 

PM sent 87 t-66...Thanks!

 

This is about as wrong as it gets. It's has been posted many times and proven over and over that high flow pumps like the Walbro will overwhelm the stock regulator and drastically raise fuel pressure, causing the car to run richer. In my experience even the FD pump is enough to make the car rich so I wouldn't recommend it to someone without a way to tune the fuel curve.

Please do not post if you do not know.

 

Don't know if it will work but when I put my Walbro 255 in my FD My mechanic said I could sell my stock FD fuel pump to anyone with an FC looking to upgrade. He may have ment TII, I don't know. If it will work I'll sell it cheep.

D.