I was looking at the walbro 255 fuel pumps and noticed a site that has 2 models of them for the evo viii and exactly the same price. One says its an HP (high pressure) and the other just says its an LPH, is their any difference??

http://www.extremepsi.com/store/cust...ar=2003&page=5

 

This is the one you want,the 342.http://www.extremepsi.com/store/cust...8&cat=0&page=5

 

why is that? what is the difference between the two?? I was just kind of curious. *confused*

 

they're the exact same thing. Walbro only made one version for the evo8

 

then why the different part numbers for the pump?

 

one is a high output the other a standard... both work well to support more power but the 342 has a higher output at full voltage than the other.

All depends on what your looking for. For cars with a dual signal voltage i'd recommend the 342 always. Our cars(lancers/evos) have that system.

 

sweet, then the 342 would be it exactly then, thanks Dan...i didnt doubt it, just kind of curious what each meant and hadnt heard anyone ask about one or the other.

 

Check this out:
http://www.roadraceengineering.com/f...pflowrates.htm

Here you'll see the differences between the two walbro 255's. Note that the 342 kicks out more LPH at both the low and high vold ranges. Pressure is essencially the same but supply/flow is greater with the 342.

 

kool thanks.

 

the higher pressure one is used when running excessive fuel pressure.