Im new in this site , I have a few questions, I have a 2000 SI and im doing a turbo system my self , im using a tdo5 mitsu , im gonna be runing somewhere around 6psi-8psi, my question is , since i spend it all my cash on the intercooler ,turbo fuel pump, pipping ect . i didnt bought a fuel press regulator , now i was thinking if i can use a stock fuel press reg out of a turbo car , like the eclipse , turbo bettle ..and adapt it to the stock rail ,will it work just fine for the amout of psi im running , im not planning to race it hard core juts ad power to spank some asses out there ..
thankyou

 

Yea im running the greddy set up in my 98 GSR and i went out and bought a B&M FPR and it works great, its about 60 dollars over the internet and buying a gauge is a must! Both of them should cost about 80-90 dollars shipped.






[Modified by TurboB18C1, 1:06 AM 11/6/2002]

 

titan motor sports is having a special on these...go in the best buy forum, you'll find it in there.

 

my b&m guage exploded, so i wouldnt use it again. there was fuel everywhere. a lot of people have had good luck with these though.

 

w/ the B&M one, you cann only turn UP the fuel pressure, you can't use it to turn it down.

 

yeah , but i heard bad thing about this b&m fpr , besides is not boost depended.
is like 90buck , i rather wait and buy the SX fpr for 150 ..
i guess ,im gonna do the experiment and see if it works the stock bosch fpr from the Turbo A3 Audi...

thanks

 

Turbo A3, to my knowledge there is no turbo A3's in the states (edit: just saw your in mexico) ? That regulator is not going to be boost dependent anyway, it'll just be rated @ X bar and keep pressure at that level. Sounds like you want a FMU


[Modified by Prod, 8:40 PM 11/6/2002]

 

so what u suggest? how bout the Eclipse regulator? should i just stay with the stock ? im only doing 6psi. On my eclipse ,i put a fuel pres. gauge and standar press is 36-40psi everytime im under boost the fuel press will raise , now correct me if im wrong but N/A fpr are set @ xpressure and can only go up so much , in the other hand i have boost 20psi on my eclipse with the stock fpr.
I used a MSD boost dependent FPR on my turbo Mirage that works great , but I dont want to spend more money on this civic since is my daily driver , besides is a pain in the *** to get parts down here in Mexico , example ; a FPr that in the states cost $130 i can get it here any day , but it cost $255 or so.
o well , ...............

thanks!

 

I dont think you understand how fuel setups work.

Stock turbo cars like (Turbo Eclipse, supras etc) control their fuel through large injectors and the ECU. Yes they have FPR but they are not boost dependent.

Your Civic SI has stock injectors and stock ecu. Therfore you must either get a Standalone ECU (the RIGHT way to do it) or get a BOOST DEPENDENT FMU to control the fuel while boosting.

You can buy a FPR like B&M but it will not raise fuel pressure under boost. You must ALSO buy a BOOST dependent fuel pressure regulartor like the Vortech FMU. You can find a used one around $100.

If you try to boost with out an FMU or Standalone you will blow your engine. So do your research and decide wisely.

 

but if he bought the greddy kit for the si , shouldn't the blue FMU and upgraded Injec. should come with it already?

 

I think he is building a custom turbo kit. So no he does not have the blue box. That is my understanding anyways. I didnt seey anywhere in his post he was using a GREDDY KIT.


[Modified by TurboIntegra, 4:44 PM 11/6/2002]

 

whoa you sure about that TurboIntegra? Everything I've read says that all fpr's raise pressure under boost, but it depends on what the rising rate is. If you use a standalone, it will raise the fuel pressure 1 psi for every 1 psi of boost. That's a 1:1 regulator.

 

Run this FPR with an ECU that supports boost and i think you will be all right, beacuse this FPR adjusts your fuel pressure when your motor is under boost.


"A 4:1 boost compensating design, it will increase fuel pressure four (4) PSI for every pound of boost pressure. A 3:1 fuel-pressure-to-boost ratio is also attainable for smaller, not so radical engines" (got this off of a website)

 

i'm also pretty sure that all fpr's are 1:1

 

i always wondered this - if you have a vortech FMU and a B&M regulator, if you adjust the pressure on the B&M, that adjustment does'nt really matter for boost because once the FMU sees boost it will override whatever the B&M is set to. Right or wrong?

 

A normal fuel pressure regulator simply keeps the fuel flowing at the stated psi...it does not add more fuel...it increases fuel delivery when pressures go up in the manifold. Think about it, if you have higher pressure in the manifold then it's pushing back on your fuel injector, if the fuel isn't adjusted by the fpr then the injector will not inject enough fuel because it has the pressure inside the manifold fighting it.

 

which fpr's can lower the fuel pressure? i know b&m can't, but i don't know the ones that can lower fuel pressure. thanks


mike