NEW INJECTORS VS RISING RATE FUEL REG Options

[swerve]

Chasing a little help from you guys as all the answers I am getting from "professionals" are all over the place.

I am around 80% complete (just need FMIC and pipes) of having all the parts required to turbo my st204 (thanks to all here of course) and am trying to see if I may be able to save a couple of hundred $$$ (NOOOOOOO!!! DON"T CHEAP OUT, yells the crowd).

I recently removed an electric supercharger that was throwing in around 4.5psi reducing to 2 in the higher rev range. Part of my supercharger setup was installing a rising rate fuel reg to "squeeze" the extra fuel required through the injectors.

I will be running a ct26 at 6psi at the time being. Question is, does anyone know what my limit may be in regards to boost before I will have to replace the injectors? Will the standard injectors and the rising rate reg be OK at 6 psi.

I know a couple of hundred $$$ saved doesn't seam a lot but it is when you buy the best of everything else and funds a running low, those $$$ are the difference between boost in 2 weeks and boost in 6 weeks.

[brianforster]

rising rate fuel regulators are thrown onto turbo/supercharger kits as a way to cover up sloppy programming imo, i dont trust them, you shouldnt either.

[Fastbird]

rising rate fuel regulators are thrown onto turbo/supercharger kits as a way to cover up sloppy programming imo, i dont trust them, you shouldnt either.

More or less as a way to compensate for a complete lack of programming. Best thing to do IMO is get a computer re-flash, piggyback, or full standalone.

[presure2]

rising rate fuel regulators are thrown onto turbo/supercharger kits as a way to cover up sloppy programming imo, i dont trust them, you shouldnt either.

agreed.
you also wont be able to run below 7psi, thats the wastegate setting on the ct-26.

[swerve]

rising rate fuel regulators are thrown onto turbo/supercharger kits as a way to cover up sloppy programming imo, i dont trust them, you shouldnt either.

More or less as a way to compensate for a complete lack of programming. Best thing to do IMO is get a computer re-flash, piggyback, or full standalone.

I already have a piggy back ecu installed as the electric supercharger required 2 fuels map and 2 ignition maps.

So what I guess you are saying is don't waste your time with the reg, get the injectors and do it properly? Do you think it would do as a temp setup?

[Bitter]

rising rate fuel regulators are thrown onto turbo/supercharger kits as a way to cover up sloppy programming imo, i dont trust them, you shouldnt either.

More or less as a way to compensate for a complete lack of programming. Best thing to do IMO is get a computer re-flash, piggyback, or full standalone.

I already have a piggy back ecu installed as the electric supercharger required 2 fuels map and 2 ignition maps.

So what I guess you are saying is don't waste your time with the reg, get the injectors and do it properly? Do you think it would do as a temp setup?

you're joking right?

[swerve]

joking about which bit?

[southwest2118]

rising rate fuel regulators are thrown onto turbo/supercharger kits as a way to cover up sloppy programming imo, i dont trust them, you shouldnt either.

More or less as a way to compensate for a complete lack of programming. Best thing to do IMO is get a computer re-flash, piggyback, or full standalone.

I already have a piggy back ecu installed as the electric supercharger required 2 fuels map and 2 ignition maps.

So what I guess you are saying is don't waste your time with the reg, get the injectors and do it properly? Do you think it would do as a temp setup?

you're joking right?

Leave him alone.

I got a standalone when i put my K&N filter in.

[scothaniel]

I'm not familiar with your setup - do you have a turbo'd 5SFE with the stock injectors?

Either way, It really depends on your perference of time vs money. If you dont have the cash and dont mind spending the time to replace the injectors in the future (if needed), then run with rising rate. Its not like they are difficult to remove. Just be sure to keep an eye on your air/fuel meter.

But, if you want to only to do this once, get the right injectors from the start. Or get an extra injector systems like a Greddy rebic.

I had a Cartech rising rate regulator on my st185 Celica - which was connected after the stock regulator, making it really easy to remove. It's a cheap way to provide a bit of extra fuel, and it worked out nicely with a mildly upgraded setup. I even used it for a little while in conjunction with the Link EMS when my boost levels exceeded my injectors capabilites. Once the newer, bigger injectors were in place, the regulator came back out.


Also be sure to remove all the banjo bolts from the fuel system - it really makes a difference in flow.

[swerve]

I'm not familiar with your setup - do you have a turbo'd 5SFE with the stock injectors?



Also be sure to remove all the banjo bolts from the fuel system - it really makes a difference in flow.

Hey Scothaniel, you answered my question perfectly. I currently have the rising rate reg setup after the original. So it seams it should be fine running standard boost until i can get the larger injectors and push the whole system further a little later.

Question though, what are banjo bolts?

[scothaniel]

These are banjo bolts:


Its the way the stock fuel system creates a 90 degree turn. There are 2 of them on a 3S motor - both on the fuel line between the filter and the rail. All your fuel has to go through that tiny hole in the center of the bolt - major restriction! Replace them with proper AN fittings and you'll be amazed at how much fuel you'll get to the injectors. I found this pic from a Stealh/3000GT site, which has some of the same pieces that I'm using.



Using the numbers from that pic, my cars fuel system goes:

(1) -> (2) -> (5) -> (8) -> (10) -> (8) -> (2) -> 1

(5) is used to add a fuel pressure gauge, which I highly recommend.

This post has been edited by scothaniel: Mar 24, 2006 - 11:28 PM