Rear Wheel Speed With Hondata S300?
11-28-2014, 08:05 AM
#51
Honda-Tech Member
11-28-2014, 10:01 AM
#52
Re: Rear Wheel Speed With Hondata S300?
There is no way to log more than one speed input...
The ECU is looking for a square wave on the factory VSS input, so if you put the ABS sensor to it, the ECU will not understand.
You can, get the MSD convertor which takes a sine wave and converts it to square for the ECU...
or
You can order up the Xenocron/Race Spec Rear Wheel Speed sensor kit, with sensor and bracket and use your factory wheel studs to trigger the hall effect sensor included and your VSS will be CLOSE to a factory unit...close enough to do things that you need to when basing things off your VSS (boost, 2 step, gear stuff, nitrous outputs...etc)
The ECU is looking for a square wave on the factory VSS input, so if you put the ABS sensor to it, the ECU will not understand.
You can, get the MSD convertor which takes a sine wave and converts it to square for the ECU...
or
You can order up the Xenocron/Race Spec Rear Wheel Speed sensor kit, with sensor and bracket and use your factory wheel studs to trigger the hall effect sensor included and your VSS will be CLOSE to a factory unit...close enough to do things that you need to when basing things off your VSS (boost, 2 step, gear stuff, nitrous outputs...etc)
11-28-2014, 04:50 PM
#53
Honda-Tech Member
Re: Rear Wheel Speed With Hondata S300?
There is no way to log more than one speed input...
The ECU is looking for a square wave on the factory VSS input, so if you put the ABS sensor to it, the ECU will not understand.
You can, get the MSD convertor which takes a sine wave and converts it to square for the ECU...
or
You can order up the Xenocron/Race Spec Rear Wheel Speed sensor kit, with sensor and bracket and use your factory wheel studs to trigger the hall effect sensor included and your VSS will be CLOSE to a factory unit...close enough to do things that you need to when basing things off your VSS (boost, 2 step, gear stuff, nitrous outputs...etc)
The ECU is looking for a square wave on the factory VSS input, so if you put the ABS sensor to it, the ECU will not understand.
You can, get the MSD convertor which takes a sine wave and converts it to square for the ECU...
or
You can order up the Xenocron/Race Spec Rear Wheel Speed sensor kit, with sensor and bracket and use your factory wheel studs to trigger the hall effect sensor included and your VSS will be CLOSE to a factory unit...close enough to do things that you need to when basing things off your VSS (boost, 2 step, gear stuff, nitrous outputs...etc)
ok, so what is the point of inputting RWS into s300 if i can't do anything with it? If i cut off the VSS and use RWS then I can't compare it in the logs which is useless. I just wanted to know if theres a way to at least LOG RWS so that i can compare it to the FRONT VSS.
Boost control in s300 only does RPM/Gear.
Last edited by SPOOLINmatt; 11-28-2014 at 07:53 PM.
11-28-2014, 07:48 PM
#54
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Re: Rear Wheel Speed With Hondata S300?
Matt, I used the rear Wheel speed with s300. its still hard to make it do what u want too, my best advice with the s300 is too turn it wide open and send it !
11-28-2014, 07:53 PM
#55
Honda-Tech Member
12-01-2014, 05:29 AM
#58
Re: Rear Wheel Speed With Hondata S300?
The point is that you will be basing EVERYTHING you do off of GROUND SPEED.
When you base boost control off of DRIVE SPEED, as your turbo car spins it is now requesting MORE DUTY cycle when off course it doesn't need it.
Same thing for turning off traction control, basing it off of drive speed it turns off immediately upon launch and spins but it you base it on ground speed it takes a brief second for the rear wheels to move and you get a delayed launch which usually helps to set the tire.
Finally you can use ground speed to do nitrous functions, maybe to help traction you want to pull 5-10 degrees out of the first 60' of the track. Well again this is easy to see what to set the mph in the nitrous tabs to enable/disable at. Basing off drive speed, well hopefully the picture is clearer
When you base boost control off of DRIVE SPEED, as your turbo car spins it is now requesting MORE DUTY cycle when off course it doesn't need it.
Same thing for turning off traction control, basing it off of drive speed it turns off immediately upon launch and spins but it you base it on ground speed it takes a brief second for the rear wheels to move and you get a delayed launch which usually helps to set the tire.
Finally you can use ground speed to do nitrous functions, maybe to help traction you want to pull 5-10 degrees out of the first 60' of the track. Well again this is easy to see what to set the mph in the nitrous tabs to enable/disable at. Basing off drive speed, well hopefully the picture is clearer
ok, so what is the point of inputting RWS into s300 if i can't do anything with it? If i cut off the VSS and use RWS then I can't compare it in the logs which is useless. I just wanted to know if theres a way to at least LOG RWS so that i can compare it to the FRONT VSS.
Boost control in s300 only does RPM/Gear.
Boost control in s300 only does RPM/Gear.
12-01-2014, 06:38 AM
#59
Honda-Tech Member
The point is that you will be basing EVERYTHING you do off of GROUND SPEED. When you base boost control off of DRIVE SPEED, as your turbo car spins it is now requesting MORE DUTY cycle when off course it doesn't need it. Same thing for turning off traction control, basing it off of drive speed it turns off immediately upon launch and spins but it you base it on ground speed it takes a brief second for the rear wheels to move and you get a delayed launch which usually helps to set the tire. Finally you can use ground speed to do nitrous functions, maybe to help traction you want to pull 5-10 degrees out of the first 60' of the track. Well again this is easy to see what to set the mph in the nitrous tabs to enable/disable at. Basing off drive speed, well hopefully the picture is clearer
12-01-2014, 05:01 PM
#60
Re: Rear Wheel Speed With Hondata S300?
Of course it does sir...
It does duty cycle by gear and rpm
How do you think the ECU calculates gear? It's by speed of course..GROUND SPEED
Your actual speed may not log correctly, but if you modify the final drive ratio, until it shows correctly each gear when engaged then you have boost by speed
It may take some trial and error but it can be made to work at least mostly well
If you add a traction control box to it then you can log both...
It does duty cycle by gear and rpm
How do you think the ECU calculates gear? It's by speed of course..GROUND SPEED
Your actual speed may not log correctly, but if you modify the final drive ratio, until it shows correctly each gear when engaged then you have boost by speed
It may take some trial and error but it can be made to work at least mostly well
If you add a traction control box to it then you can log both...
12-01-2014, 05:17 PM
#61
Honda-Tech Member
Ya I see what you are saying but I don't see how that's possible. I know that it calculates the speed but if it's a boost by gear by rpm table...then when my tires break loose it's going to follow the rpm/boost table as I set it rather than what mph it's at. I don't see where speed comes into play when the table is set per rpm in that gear.
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