Anyone understand this?
#1
11-03-2006, 12:04 AM
Anyone understand this?
This is from 3rd gen camaro.org
Q: How can I bypass the speed limiter?
A: Try the following steps:
Install a Zemco Performance Timer and instead of using the speed sensor supplied, tap into the electronic output from the normal sensor in the tranny (there shouldn't be a problem driving two sets of electronics in parallel).
Then fit an ON/OFF switch into the speed sensor wires that goes into the ECM.
Wire the torque converter so it's not controlled by the ECM, but rather by on ON/OFF circuit switch. This results in non-lockup when the shifter is manually put into 1,2 or 3. Selecting OD will get normal up-shifts without lockup until 4th when lockup comes in. The while in OD, if the tranny downshifts due to speed/throttle settings, the TCC stays locked unless drop it out using the switch (except for 1st gear which doesn't allow pressure to the TCC anyway due to the hydraulics).
The Zemco unit can be easily recalibrated if you change tire size or rear gear ratios. When you want to push the car past the speed limiter in the ECM, just switch OFF the speed sensor input to the ECM and use the Zemco unit to show your speed. All that happens with the ECM is the normal speedo stops working and you lose cruise control. After about a minute the ECM realizes that the pulses are missing from the sensor and gives you a service engine light. This does not affect the normal operation of the engine and the light goes out again after a few seconds when the sensor is switched back on.
Q: How can I bypass the speed limiter?
A: Try the following steps:
Install a Zemco Performance Timer and instead of using the speed sensor supplied, tap into the electronic output from the normal sensor in the tranny (there shouldn't be a problem driving two sets of electronics in parallel).
Then fit an ON/OFF switch into the speed sensor wires that goes into the ECM.
Wire the torque converter so it's not controlled by the ECM, but rather by on ON/OFF circuit switch. This results in non-lockup when the shifter is manually put into 1,2 or 3. Selecting OD will get normal up-shifts without lockup until 4th when lockup comes in. The while in OD, if the tranny downshifts due to speed/throttle settings, the TCC stays locked unless drop it out using the switch (except for 1st gear which doesn't allow pressure to the TCC anyway due to the hydraulics).
The Zemco unit can be easily recalibrated if you change tire size or rear gear ratios. When you want to push the car past the speed limiter in the ECM, just switch OFF the speed sensor input to the ECM and use the Zemco unit to show your speed. All that happens with the ECM is the normal speedo stops working and you lose cruise control. After about a minute the ECM realizes that the pulses are missing from the sensor and gives you a service engine light. This does not affect the normal operation of the engine and the light goes out again after a few seconds when the sensor is switched back on.
#2
11-03-2006, 12:21 AM
RE: Anyone understand this?
It will be much easier to get the PCM reprogrammed to delete the speed limiter, and to take in account tire size change. Not to mention getting a better tune for your engine at the same time.
#4
11-03-2006, 03:04 PM
RE: Anyone understand this?
One place I am familiar with is www.pcmforless.com. They will usually do it on an exchange basis. Also many of the dyno tuning shops have the equipment available to do the tuning.
#5
11-04-2006, 12:04 AM
RE: Anyone understand this?
I am assuming Mombofan has a third gen Camaro
You can either find out if there is a chip availible for your car or I have not been able to find it again but years ago I read about the toggle switch on the TCC wire of the ALDL connector. It also allows you to bark in gear changes. The TCC is not a speed limiter. It is as much a speed limiter as valve float is a rev limiter.
You can either find out if there is a chip availible for your car or I have not been able to find it again but years ago I read about the toggle switch on the TCC wire of the ALDL connector. It also allows you to bark in gear changes. The TCC is not a speed limiter. It is as much a speed limiter as valve float is a rev limiter.
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