Free super chip for shunting 3.9.
Discussion
Now I have you attention... I need a test car for my modified 3.9 fuel map on a car that has a shunting problem. I have a modified hybrid chip with Steve Sprints base code. This has some really nice touches like:
Extended and smoothed RPM table to 6250 rpm.
ECU managment warning lamp enabled.
The latest Stepper motor code from Lucas from "operation pride".
Ive taken the TVR 3.9 catalyst fuel map, and put enough uplift on the fuelling to stop the lambda cycling at the shunting point so the mixture will run richer- hopefully to reduce or eliminate the shunting. Currently stopping the lambda cycle will make the car fail at MOT time on fast idle emission, but a future map can be made switch able so you can go back to the stock map at the flick of a switch if this works.
The non catalyst map is a hybrid of the TVR catalyst map, with reduced fuelling under light load, and significant lean of under near closed throttle to produce over run race car noises between 4000 and 2000 rpm. This means both maps will give full power on a TVR motor, unlike the non cat Range Rover map in the stock TVR chip.
WARNING- if you have catalysts fitted, and run the non catalyst map you could cook the catalysts.
So whats needed is someone with a 3.9 that has the shunting problem, that is not afraid to open up the ECU and swap the chip and report back with the results. Even better would be someone who does not mind messing around with the tune resistor to try and see if shunting is eliminated on the non cat map- Ideally someone who has already removed the catalyst.
Chip is free to a suitable volunteer -any takers?
Extended and smoothed RPM table to 6250 rpm.
ECU managment warning lamp enabled.
The latest Stepper motor code from Lucas from "operation pride".
Ive taken the TVR 3.9 catalyst fuel map, and put enough uplift on the fuelling to stop the lambda cycling at the shunting point so the mixture will run richer- hopefully to reduce or eliminate the shunting. Currently stopping the lambda cycle will make the car fail at MOT time on fast idle emission, but a future map can be made switch able so you can go back to the stock map at the flick of a switch if this works.
The non catalyst map is a hybrid of the TVR catalyst map, with reduced fuelling under light load, and significant lean of under near closed throttle to produce over run race car noises between 4000 and 2000 rpm. This means both maps will give full power on a TVR motor, unlike the non cat Range Rover map in the stock TVR chip.
WARNING- if you have catalysts fitted, and run the non catalyst map you could cook the catalysts.
So whats needed is someone with a 3.9 that has the shunting problem, that is not afraid to open up the ECU and swap the chip and report back with the results. Even better would be someone who does not mind messing around with the tune resistor to try and see if shunting is eliminated on the non cat map- Ideally someone who has already removed the catalyst.
Chip is free to a suitable volunteer -any takers?
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