TRD Supercharger

[Robert Wimmer]

Ed:

1) Your right that the stock FP on the 3.4 engine is 38-44 psi.  I'm intending to install a FMU (rising rate FP regulator) along with the supercharger to increase the pressure to the 60 to 65 psi range.  My major worry is how to set up the FMU so it does not boost the FP prematurely.

2) Do you know the range of the Vf signal and how it relates to either air or fuel flow?

3) I think the "Boost a Pump" you mention it triggered by boost pressure, not RPM.  But I assume it could be modified to also trigger off of RPM.

What I think is necessary for the best driveability and performance would be to raise the FP in two stages.  First, increase FP 1/1 to compensate for manifold pressure, and let the AFM and ECU control A/F. When A/F starts to lean out at high RPM, increase FP to 60-65 psi.

4) I have traded e-mails with two of the 4Runner Webringers with TRD superchargers.  They have solved their driveability problems by switching to aftermarket injectors, AFM and ECU.  This solution is out of my price range and I am not sure it is necessary.

Thanks,

Bob Wimmer


>>> <Ed.Wong at astrapharmaceuticals.com> 11/22 3:40 PM >>>


>>
This assumes a fuel rail pressure of 60-65psi.  Is this correct?
<<

It was my understanding that EFI pressure ratios were
lower - like closer to 45psi. I may be wrong as I am more familiar
with the 22RE than the later V6 engines.

>>
2) Is there a way to determine when airflow will exceed the MAF and ECU's
ability to maintain the proper A/F mixture at stock fuel pressure?  I would like
to have some idea when (RPM @WOT) to begin boosting fuel pressure prior to
installing the supercharger.
<<

Im curious if the later EFI systems still use the Vf trim signal.
If so - this will give you a real close look at what the OEM EFI
thinks is going on and how much adjustment is still avail (or
NOT avail as the case may be).
See if there is a connector marked "Vf" in the check
connector box next tothe fuse box in the engine compartment

>>
3)  Is there a simple way to increase fuel pressure based on boost pressure and
engine rpm?  I would like to avoid running overly rich, due to increasing fuel
pressure based strictly on boost, while still within the MAF control range.
<<


I think there is a "Kenne Bell" "Boost a Pump" device that does this.
Most people on this list appear to want to build their own decives
from chips though.

>>
I guess if I'm really lucky, one of the list's readers will have installed and
"dialed in" one of these TRD superchargers.
<<

Check out the 4Runner Webring. There was at least one site that
had a TRD "dial in" description.
Try starting at the bottom of this page -
fascianting Toyota stuff
There is a 4Runner specific ring but I cant find it right now

Ewong
TIA,

Bob Wimmer