Ae86 fuel pump options

[shorestyle]

oldeskewltoy Wrote:BE CAREFUL!!!!!!

The AE86 stock pump has a flow volume of approximately 80 lph. Swapping in a pump designed to flow 255 lph is NOT... I REPEAT... NOT a good idea! I have this information on the best source........ Walbro engineering!!!

A 255 in a corolla will at the very minimum cause excess fuel heating by over circulating the fuel! Other problems besides overheating that can occur... poor idle, poor off idle response, poor fuel economy. This is because the 255 pumps flow soooo much fuel, that the return line becomes an obstruction. This raises fuel pressure in the fuel rail, cause excess fuel to flow past the injector.

Now... if you are running 30psi of boost, then by all means get a 255 and replumb all the fuel lines... BUT for stock, or mildly built EFI cars you want a GSS310 Walbro fuel pump. This pump is used in the Integra B18C... it flows 115 lph at the exact same pressure as the stock AE86 pump. 115 lph is enough fuel in N/A form to support 230hp. In boosted form it can support 195-200 hp. Boosted apps require more fuel, that is why the same pump supports less boosted hp, then N/A hp.

You will still need the AE86 install kit, but try to ask your Walbro dealer for a GSS310 pump

what if you're running a silvertop 20v? (with stock injectors, 295cc) would 255 lph work in that case (walbro)? or would a 160 lph be more appropriate (tre)