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https://www.cajinnovations.com.au/forum/YaBB.pl MyECU >> Getting started with MyECU >> TPS base https://www.cajinnovations.com.au/forum/YaBB.pl?num=1287499263 Message started by greenmonster on 10/20/10 at 00:41:03

Title: TPS base
Post by greenmonster on 10/20/10 at 00:41:03

Does the TPS have to be set at the 150mV base for MyECU P8 to work & map correctly?

Or,

Quote:

From January 2006, MyECU now ships with the TPS set to 0. This special value instructs MyECU to determine the TPS itself. For this to work you must have the fast idle turned off and have no throttle applied when the ignition is turned on AND for the duration of the fuel pump prime. This procedure will need to be followed each time the ignition is turned on until the TPS base is set to its proper value.

from Getting Started page http://www.jefferies-au.org/MyECU/index.htm ,
does this mean that MyECU sees where the TPS is (regardless voltage)and calls that 0?

Or maybe simpler,
if a TPS base voltage is f e 450mV, will the throttle values in MyECU be larger than what you see?
Like the 64 base is actually more like 150?

Just wanna be 100% sure I understand this.

Title: Re: TPS base
Post by _Cliff_ on 10/20/10 at 07:06:36

MyECU doesn't really care what the TPS base is set to but your bike will.

The OEM ECU has an absolutely positioned map which is why you need the TPS calibration.

MyECU has a floating map that can be positioned with the TPS base setting. Optimally you want to have the base of the map aligned with the base of the normal throttle range.

You can, if you want, run it like the OEM simply by setting a fixed value for TPS base. Its your choice. You can adjust the hardware or the software.

Title: Re: TPS base
Post by raz on 10/20/10 at 16:15:40

As you know, the TPS is not linear but has two different slopes with the breakpoint between them at approx 30 degrees IIRC. So one effect of deviating from the 150 mV spec is you will change the point where the less steep slope is "kicking in". I'm not sure this will matter much in real life. Anyway I prefer going by the book because it makes our maps more easily "sharable" between us.

Also, if disassembling and reassembling your bike, you need some baseline in order to get back to your tune. Why not go with the provided one!

Title: Re: TPS base
Post by greenmonster on 10/25/10 at 10:29:38

Good point I think, raz.

Another hypothecical Q:
Could you switch to a non linear TPS on a P8 bike and just make proper TPS breaks for that in MyECU?

Title: Re: TPS base
Post by raz on 10/25/10 at 10:58:51

I can't see any problem with that.