sc-14 s/c onto a 1994 mazda b3 motor

[Jetro]

well as it says....

this is the toyota blower and i would like any info on putting it onto a 1.3l B3 engine with carb looking efi system.
this motor is in the 121/revue mazda and ford festiva.

fitting the blower is not a problem but setting up the fuel side of things is.
can i "re-jet/modify" my efi for more fuel or do I need to add an extra injector? or do i have to touch my feul system at all?

I belive I need more fuel as it will be leen with the extra air.

[KC Ron Carter]

On EFI the fuel issue is very easy to see.

The manufacture builds a little extra into the EFI standard.

The injectors are powered with a 65% utilization.

If you have 200 hp you should be able to increase to 270 hp with no changes at all.

On FI the basic rule is 50 hp for every 3 psi.

if you are running 5 psi you can go with no changes.

To add more fuel to a FI setup the best way is to use a RRFPR, Rising Rate Fuel Pressure Regulator. It installs in the fuel return line from the OE FPR to the fuel tank. All EFI fuel systems have a fuel pressure regulator and it control pressure by returning fuel to the tank.

If you put a RRFPR in the return line and it is activated on when the intake is under positive boost. The OE regulator is used during most driving and no change to fuel system. If under boost the RRFPR will close the return off and raise fuel pressure and make it flow more fuel.

http://www.bsmotor.com/cgi-bin/bsmot...&ant=6&pros=65

Here is a WEB site and if you raise the fuel pressure the HP rating of the injectors can be raised by 50%. So it just a matter of a additional fuel pressure regulator added to the fuel return line if you are going over 5 psi of boost.

Here is the ones I like, Cartech RRFPR, they have a lot of range adjustments.

http://www.cartech.net/fmu2020.htm

You will need to veryify or what we call TUNE the fuel system after it is built. To do that requires a wideband o2 sensor set up.
You should allow this to be done outside to verify you have not missed anything.

Here is the setup I have attached to my Dyno, yep I have a mobile Dyno.

http://www.innovatemotorsports.com/

Normal o2 sensors tell if you are lean or rich from 14.7 to 1.

This machine can allow setting the ratio to 12.5 to 1 and will map it to the RPM and any other issues like NOS or water injection to make sure it will work for a long time with no issue.

Later,

[pod]

if the supercharger works tell me i want to put one in my aspire. go to www.festivamotorsport.com and go to the performance section and get bigger injectors also you might want a new cat back or headders