Evo X upgrades

[FattyBoomBatty]

Why insist on larger injectors when you can just turn up the fuel pressure? Injector Dynamics themselves say it's fine to run 100psi. So set your base pressure at 60psi if you are running out of fuel with the 1000s.

[Super Bleeder!!]

Why insist on larger injectors when you can just turn up the fuel pressure? Injector Dynamics themselves say it's fine to run 100psi. So set your base pressure at 60psi if you are running out of fuel with the 1000s.

Cranking the fuel pressure lowers the output of the fuel pump.

[mlomker]

Injector Dynamics themselves say it's fine to run 100psi.

That requires an afpr setup, which isn't free. It also makes controlling the idle difficult and you have to disable the pressure reliefs on a Wally 255 to make it happen. I looked into this approach and most tuners didn't like the idea of upping pressure by more than 2-3 psi.

My 1000cc injectors are DW. The ID2000's flow an insane amount at high pressures. 3710 at 130psi!

[FattyBoomBatty]

ID's aren't magically different than different brands when it comes to flowing more at high pressure. Your DW's will do the same. Also, I'm under the impression that there are different types of walbro pumps, specifically a low and high pressure version. Or go with a fancy anodized pump from another manufacturer that can actually work at higher pressures.

VW guys have been putting 4 and 5 bar fpr's on their stock injectors for a long time. Maybe floppyhead could expand on his trite statement by showing a chart or something of fuel flow over psi for a regular walbro? Maybe?

Also, with all you've done, I am actually surprised you don't have a bcfpr. 20 pages and no aftermarket fpr? For shame! It's one of the first things I bought.

[mlomker]

a fancy anodized pump from another manufacturer that can actually work at higher pressures.

I must admit, the racing fuel setups are pretty bling. Gates' surge tank looks like an octopus in his trunk...pretty cool.

20 pages and no aftermarket fpr? For shame! It's one of the first things I bought.

I actually do own one but I haven't bought all the hoses and fittings to install it. It shouldn't be necessary with this turbo from a flow perspective.

Cranking the fuel pressure lowers the output of the fuel pump.

This isn't a regular Walbro but the principle should be the same. You'd want a beefy pump setup if you were doing something extreme like doubling the base.

http://i959.photobucket.com/albums/ae80/mlomker/fuelpumptest2.jpg

[Shane@DBPerformance]

ID's aren't magically different than different brands when it comes to flowing more at high pressure.

They are different! Some injector will actually start flowing less at higher base pressure.

Why insist on larger injectors when you can just turn up the fuel pressure? Injector Dynamics themselves say it's fine to run 100psi. So set your base pressure at 60psi if you are running out of fuel with the 1000s.

You need some crazy fuel pump setup to run a high base pressure with high boost on top of it. You would only be able to run super high base's with an all-motor car or with mechanical fuel pumps. Walbros also don't like much over 75-80psi, so 60psi + 30psi of boost = past the crack pressure.




Also, with all you've done, I am actually surprised you don't have a bcfpr. 20 pages and no aftermarket fpr? For shame! It's one of the first things I bought.

Most people don't need an AFPR, it's one of the most over hyped and often un-needed parts that people waste their money on instead of actual parts they need.

[Kracka]

...and owned. Nice info Shane, thanks for clarifying those points.

[311evo]

...and owned. Nice info Shane, thanks for clarifying those points.

+1, lol. I enjoyed that.

[mlomker]

meh, I like FattyBoomBatty. I love his car and he's a decent conversationalist. Some people on here don't discuss things because they 'know' they are right and don't feel a need to explain their answers.

[turbotalon1g]

^Good point and very good info on this page.