TRL VFCC Settings

TRL Performance: VFCC (Voltage Fuel Cut Controller)

 

Installation can be found at

http://www.trlperformance.com/vfcc.html

 

Setting up the VFCC.

 

1. Flip up the lid to the VFCC.

 

2. Orientate the box so the following is true;

 

a. The dial on top left (Marked “F.C”) which should

be set at position 8 as default is known as the

“Fuel Cut” threshold dial.

 

b. The dial on top right (Marked “o’boost”) which

should be set at position B as default is known

as the “OVERBOOST” threshold dial.

 

(The default settings are for a Toyota Supra 3.0lt TT)

 

3. Set your boost controller to the desired boost level

for the car. E.g. 1.1bar

 

4. Rotate OVERBOOST dial to position “F” to raise

the OVERBOOST level to the highest point.

This is a measured 4.99V from the vehicles MAP

sensor, equivalent to the maximum output level

the MAP sensor can generate.

 

 

 

Setting the FUEL CUT

(By default this is set to position 8 = 4.2V which is for the Supra TT)

 

5. With the “Fuel Cut” dial set at position 8,

drive the car and see if you experience fuel cut.

Then…….

 

a. If it does still hit fuel cut rotate the “Fuel Cut” dial

ANTI-clockwise (to position 7 from 8 for example)

and try again. Keep doing this until fuel cut is removed.

 

b. If it does not hit fuel cut rotate the “Fuel Cut” dial

CLOCKwise (to position 9 from 8 for example) and

try again. Keep doing this until fuel cut comes back

again. At the point where you hit fuel cut you know

that the previous position was just right. (i.e. rotate

the dial back, anti-clockwise, one position))

 

6. Setting of the FUEL CUT threshold is now

complete.

This is the setting to be used for all cars of this

type. (e.g. most Toyota cars have a setting of

8 or 9 as 4.2V is the fuel cut trip voltage to the ECU)

 

 

You will observe that a small green LED (rectangular white blob) in bottom left hand corner, will illuminate if the VFCC is operational. i.e. is removing fuel cut. Boost pressure has to be above the factory fuel cut level for the device to activate. So you should NOT see any LED’s illuminated during idle.

 

The LED’s might be hard to see so get someone else to shade the sunlight from the box and observe whilst you drive.

 

You should NOT observe the RED LED (again a white rectangular blob) in the bottom right hand corner illuminating.

 

 

Setting the OVERBOOST

 

7. Now set the OVERBOOST dial.

(ONLY IF YOU REQUIRE THIS FEATURE)

(For the Supra leave this as is for 18.5psi)

 

The overboost is a safety feature of the VFCC to

enable you to re-introduce the fuel cut at a higher

level. So you still get the safety of knowing the ECU

will hit fuel cut should something fall off the car or

the turbo control mechanism fails.

 

8. Rotate the OVERBOOST dial ANTI-clockwise

(from F to E) and again go for a drive.

 

9. IF you now hit fuel cut, rotate the dial one click

clockwise (Maximum F, do NOT rotate from F to 0!).

You have now set the maximum boost you will allow

before fuel cut will be reintroduced.

i.e. if you boost higher than that set by the boost

controller the safety feature will activate.

 

10. If you do NOT hit fuel cut, goto 8.

 

 

If you observe anything different to the above please contact Peter Betts at TRL Performance on 07802 412969

I've got a TRL vfcc here and was looking on the BBS for instructions. I saw this post but I'm noticing some differences between these instructions and the unit I've got :

Originally posted by TRL Performance

1. Flip up the lid to the VFCC.

Lid? This one has four screws holding the top on.

a. The dial on top left (Marked “F.C”) which should

be set at position 8 as default is known as the

“Fuel Cut” threshold dial.

Mine has that dial marked as "Fuel Cut" not “F.C”, so I guess that's correct.

b. The dial on top right (Marked “o’boost”) which

should be set at position B as default is known

as the “OVERBOOST” threshold dial.

Again, the dial on my one is marked "Over boost"

If you observe anything different to the above please contact Peter Betts at TRL Performance on 07802 412969 [/b]

This one I have has the date 8/06/01 on the PCB

I'm looking for confirmation that this unit is OK for me to use, I'm pretty sure it is but I'd rather not take any chances.

Thanks

I just noticed that this one is Ver 2.3 according to the PCB markings. I see the one on the TRL web site is Ver 3

http://www.trlperformance.com/vfcc3_dials.jpg

 

Are there any problems with Ver 2.3? What are the differences between version 2.3 and 3?

Are there any problems with Ver 2.3? What are the differences between version 2.3 and 3?

 

Rest assured the version 2.3 and 3.0 are IDENTICAL in operation.

 

ALL I have done is make the unit smaller and easier to get into.

 

V3.0 = 35*35*10mm with a flip top lid.

 

V2.3 = 70*50*25mm with 4 screws holding the lid on.

 

BOTH have a Fuel Cut dial or F.C. and OVERBOOST dial or O'Boost.

The text is only different as there is physically no room to print all the letters.

The Setup is the same for both versions.

 

For a SUPRA TT you should NOT have to change from the default settings anyway. It should work for most of you 99% of the time 1st time.

Default:

F.C. = position 8

O.Boost = Position B

 

Any VFCC's sold by me since end of June will be the NEW version 3.0

 

Regards

Pete

 

Thanks Pete, I thought it was probably something like that. Always best to check though.

 

 

Originally posted by TRL Performance

Rest assured the version 2.3 and 3.0 are IDENTICAL in operation.

Sorry for raising the dead...

 

But can someone tell me if there is a difference between these units with regard to a VVTi and non car.

Are they type specific?

 

Thanks

No. They work fine on VVTi Supras - unlike the Thor DSC which doesn't work at all well with the VVT Autos ("Tiptronic")

Thanks Jake, so you are saying I can buy any TRL FCD(eg like ones selling in the for sale sections) and it will work in either VVTi and Non VVTi?