using rear ABS with AEM.
01-10-2012, 08:47 PM
#51
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01-10-2012, 11:28 PM
#52
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Re: using rear ABS with AEM.
Yes. Hook up a scope and count the number of pulses you get on the front vss for one tire rotation. Divide the inches of tire circumference by the number of pulses. This gives you pulses per inch. Take the circumference of the back tire and multiply by your pulse/in. That's the number of teeth you need on the abs ring. Use the MSD box to convert to a hall signal and run that output and the vss output through a 3 position toggle switch before the ecu input. Position one for vss to do your burnout and position 3 for the MSD box to do boost-by-ground speed. I'll find the part number to the MSD box we use tomorrow at work for ya.
01-10-2012, 11:41 PM
#53
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Re: using rear ABS with AEM.
Yes. Hook up a scope and count the number of pulses you get on the front vss for one tire rotation. Divide the inches of tire circumference by the number of pulses. This gives you pulses per inch. Take the circumference of the back tire and multiply by your pulse/in. That's the number of teeth you need on the abs ring. Use the MSD box to convert to a hall signal and run that output and the vss output through a 3 position toggle switch before the ecu input. Position one for vss to do your burnout and position 3 for the MSD box to do boost-by-ground speed. I'll find the part number to the MSD box we use tomorrow at work for ya.
and thank you.
01-11-2012, 04:57 AM
#55
Re: using rear ABS with AEM.
Currently I use time or speed based launch limiters and retard for power control out of the hole.. For power down the track, with the current system I use most commonly we have differential wheel speed based traction control. This uses ignition timing to precisely control wheel spin all the way down the track.. If you don't have either of these, say with like S300, or older AEM systems, you can use the main ignition maps (obviously within reason) to really fine tune the power delivery from the launch all the way down the track. Using a combination of boost control and ignition strategies you can get very precise control of your power output anywhere on the track.
Basically you can keep the turbo zinging away so that the power is always available, then use ignition to finely control it within your needs.
Basically you can keep the turbo zinging away so that the power is always available, then use ignition to finely control it within your needs.
01-11-2012, 05:02 AM
#57
Re: using rear ABS with AEM.
Yes. Hook up a scope and count the number of pulses you get on the front vss for one tire rotation. Divide the inches of tire circumference by the number of pulses. This gives you pulses per inch. Take the circumference of the back tire and multiply by your pulse/in. That's the number of teeth you need on the abs ring. Use the MSD box to convert to a hall signal and run that output and the vss output through a 3 position toggle switch before the ecu input. Position one for vss to do your burnout and position 3 for the MSD box to do boost-by-ground speed. I'll find the part number to the MSD box we use tomorrow at work for ya.
01-11-2012, 09:16 AM
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Re: using rear ABS with AEM.
The Series 1 will do it the same way. There are jumpers for this inside the box just like the Series 2. However I just posted the way to do it on the Series 2. Same way to set everything up just different names for things in the software side.
Tony yeah there is a easy way to figure out the VSS calibration number I just forgot what the math was. haha.
Tony yeah there is a easy way to figure out the VSS calibration number I just forgot what the math was. haha.
01-11-2012, 09:27 AM
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Re: using rear ABS with AEM.
If you want to do a ignition based traction control you can do this in the AEM Series 2. Although it won't be defined by front vs rear wheel. You can do this in a rate of acceleration of the motor by gear.
For a quick explanation of this you set the rate of accel for RPM, than set a threshold per gear for the traction control to be active, Than you have an ignition cut table per gear.
For a quick explanation of this you set the rate of accel for RPM, than set a threshold per gear for the traction control to be active, Than you have an ignition cut table per gear.
01-11-2012, 10:43 AM
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Re: using rear ABS with AEM.
01-11-2012, 08:13 PM
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Re: using rear ABS with AEM.
I have the values for the AEM for the rear ABS ring if anyone wants them.. I've setup a couple cars with rear wheel speed on AEM.
01-12-2012, 03:50 AM
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01-12-2012, 06:11 AM
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Re: using rear ABS with AEM.
The calibration should be close however you may need to do some fine tuning of the calibration to get it to work on a stock sized 15. However since you have stock wheels what you can do is drive it out on the street and change the calibration number til it matches your VSS on your dash or if you have gps or something. The max number is 250 so you may have to use the *8 function that Chris has turned off and adjust from there.
With the VSS*8 turned on the calibration number will be 31.25
01-12-2012, 06:17 AM
#70
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Re: using rear ABS with AEM.
So stock and ring and sensor to the msd box to Aem and cal? What pin does it go to on the ecu. Just the vss pin and the cluster will still work.
01-12-2012, 07:23 AM
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Re: using rear ABS with AEM.
Yep you can purchase a GPS sensor and wire it into the AQ-1 that would go through the serial input so you wouldn't use one of the analog inputs. However the serial is also used for the Series 1 so you have to choose which one you would want. However the Series 2 can communicate through the AEM Can-bus and you can use the serial for GPS. It will give you a lot of info. Track mapping, speed, altitude, etc.
01-12-2012, 07:31 AM
#74
Re: using rear ABS with AEM.
Yep you can purchase a GPS sensor and wire it into the AQ-1 that would go through the serial input so you wouldn't use one of the analog inputs. However the serial is also used for the Series 1 so you have to choose which one you would want. However the Series 2 can communicate through the AEM Can-bus and you can use the serial for GPS. It will give you a lot of info. Track mapping, speed, altitude, etc.
01-12-2012, 07:57 AM
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Re: using rear ABS with AEM.
We are going to start selling them soon. Just have to figure out which ones and how we are going to package them. Magnet mount, etc..
We have tested the Garman units here and had great success with them. They have the GPS 18x in both 1Hz and 5Hz models. I would go for the 5Hz.
We have tested the Garman units here and had great success with them. They have the GPS 18x in both 1Hz and 5Hz models. I would go for the 5Hz.