FPR questions. - Honda Prelude Forum

Initial Lude · 04-14-2004, 12:28 PM

im about to install my turbo and bought almost everything i need for it.

but a question came to mind, when i was about to install from one of my friends. they asked will my Walboro fuel pump keep up with the stock fuel pressure. they talked about either getting the fmu and stickign that in with the inline fuel pump? either that or using the gas fuel pump, and getting a FPR.

they asked me to ask u guys b4 we start. need some help ASAP. thanks

MugenPoweredLude · 04-14-2004, 02:10 PM

IIRC, the Walbro raises the fuel pressure by 2-3psi so a FPR would be needed to bring it back to what you want

sharkcohen · 04-14-2004, 03:21 PM

What is your planned engine management?

Initial Lude · 04-14-2004, 05:03 PM

as of now im just gonna tuen my car with a safc.

i konw, i konw. i need soemthinb better. i was planning to the a ems system or hondata. whichever would be @ my grasp.

sharkcohen · 04-14-2004, 06:41 PM

Quote:

Originally posted by Initial Lude
as of now im just gonna tuen my car with a safc.

OK, what else? You aren't just going to put in a turbo, a high flow fuel pump, and an safc, are you? What is your planned setup?

MugenPoweredLude · 04-14-2004, 07:40 PM

I wouldnt even think about putting on a turbo with just a SAFC
wait until you can get a standalone, then install everything

Initial Lude · 04-14-2004, 07:41 PM

i mean.. besides the turbo and intercooler...

i have the safc, comestic head (9:1 CR), larger fuel pump, colder plugs and wires, larger injectors 450cc, vortech fmu...

i think that might be it.

MugenPoweredLude · 04-14-2004, 07:46 PM

ditch the fmu and go Hondata or AEM EMS

Initial Lude · 04-14-2004, 07:51 PM

wannnna give me money anthony?

i mean it will do until end of summer i hope ?

tempest down here does really good tuning. they own a 10 second prelude.

www.tempestracing.com

sharkcohen · 04-14-2004, 07:57 PM

Why would you run an FMU with 450 cc injectors? What is the rise rate on that FMU? How are you going to use those injectors, afc hack?

Initial Lude · 04-14-2004, 08:09 PM

no FMU, with larger injectors.

the fmu is 12:1?

sharkcohen · 04-14-2004, 08:46 PM

Ok, so you happen to have the Vortech FMU handy, but are not using it with the setup, is that correct? I think you'll be fine with the Walbro in-tank. The limitation will be the injectors, how much power are you trying for?

Initial Lude · 04-14-2004, 09:03 PM

247 whp was what 02luder had with 7psi.

Initial Lude · 04-14-2004, 11:18 PM

hmm.. so am i gonna need a FPR to run my turbo setup? im about to get one, but i dont want to spend money if i dont need too.

sharkcohen · 04-15-2004, 12:50 AM

I'm not sure what you would need an adjustable fpr for, unless you think you need to lower your idle fuel pressure.

Initial Lude · 04-15-2004, 05:59 AM

i was just told that my fp will not be able to keep up with the larger fuel pump, something on the lines of that

sharkcohen · 04-15-2004, 01:41 PM

Perhaps they meant that the pump will not be able to keep up with high fuel pressures. If you got the Walbro 255 lph high output pump, it would be fine with high pressures.

Did I understand correctly, you are not using the Vortech FMU, correct?

Initial Lude · 04-15-2004, 04:55 PM

yeah... would u suggest to use the injectors over the FMU?

i was planning on just using the larger injectors, arent they better?

sharkcohen · 04-15-2004, 05:33 PM

Yeah, I would go with the injectors and the afc hack. I was just making sure you weren't trying to run both the FMU and the injectors