Ok so I've tinkered with this a little and I'm a little perplexed exactly wtf is going on with the throttle plate in relation to the throttle pedal. Has anyone confirmed that the TPlate % reading in datalogs is in fact accurate? As in a 75% reading = 75% opening, and 100% = WOT? I created a scaled throttle table where everyhthing is scaled to 75% (I chose 75% since I figured it was sure to be WOT if it's estimated to be ~66% by others).

Here's the table I made:
[attachment=93612:throttletable.jpg]

And here's the datalog:
[attachment=93613:wtfdatalog.jpg]

I have two datalogs and they consistently show a throttle plate of 76% MAX, even though the pedal is 100%. Is this not what you guys saw? It's always possible hondata changed some code but maybe the fact that I don't have 100% tpedal = 100% tplate it's screwing things up? I'll have to try some other things but I guess it doesn't work how I thought it did.. :/ On another note the driveability with this throttle table is improved, but if I can't hit WOT that's no bueno.

 

That looks correct to me. You set the value in the 7788 RPM and 100% TPedal block to 75% TPlate and you got 76% TPlate instead. What we are saying is that while that says 76% TPlate, the reality is that it is 100% TPlate. I am assuming that the car felt like the car was at WOT when you made that datalog.

 

Thanks for that info. Honestly I haven't been driving the car much lately so it's really hard to say whether it felt like 75% throttle or WOT. Not to mention with hondas, sometimes the difference between 75% and 100% isn't a very big difference. I guess I'll have to play with it a little to see if I can figure out what's going on.

I did some google searching and gernby's datalogs from a long time ago actually showed a tpedal of 50%, but showed a tplate of 88% (or something like that), so it was showing up in the datalogs. Who knows if hondata has changed code since then and if it's displaying differently but actually the same, actually is correct now, etc.

 

I can tell you I did back to back datalogs setting 100%TPedal to 100%TPlate and 80%TPlate, and there were ZERO differences in the log. I pulled the same amount of boost, the third gear pull from 3500 RPM to 8300 RPM took the same exact time. You need to realize that what Hondata displays in the datalog as TPlate is not actually what the throttle plate is at.

 

Gotcha, that's a fairly conclusive answer. The problem with hondata though is that so many things affect other things and who knows if things have changed in the code.

I posted on the hondata forum for a clear explanation of what the tplate % actually represents. It could just be the signal that's sent to the TB controller rather than the actual tplate position reported from the TB..? I'll be curious to hear what they say. Thanks for your help.

 

Make sure you post up their answer. I searched the Hondata forums and other than Gernby I really didn't see anyone else talking about the S2000 DBW tables.

 

I'm actually experiencing some strange behavior now from the throttle plate % after a previous flash that limited it to 75%. I've now modified the throttle tables to 90% and 100% in the top two columns but datalogging only shows a max tplate % of 76% still, after reflashing the car's computer twice.

I'm not sure what the heck is going on, but I'll be damned if this thing is anything but intuitive..

Is it possible it takes some time for the throttle controller to relearn something? Talk about strange behavior. Granted I haven't driven the car a whole lot (short drives to and from work), but I can't get the tplate % to hit 100% now.. Anyone seen this before?

 

All I can tell you is that I was reflashing on the dyno and getting different results on back to back runs.

 

Ya the flashpro is an exercise in frustration, and I see why people opt to just run a true standalone. I started a thread on the hondata forum, and I always find hondatas responses to be incomplete and sometimes completely contradictory.. It's like they're intentionally being obtuse and vague..

One sentence they say:

and then say..




Oh ya Tut, their official response to what tplate % represents in the logs:
So whether that's the actual throttle body/plate % opening is anyone's guess. It seems likely, but if there are multiple TPS's (due to the throttle controller), who knows what it represents..

 

In case you don't already know, you can remove the cover from the throttle PEDAL angle sensor, which is near the brake master cylinder, and manually change the pedal angle reading from the engine compartment. If the car is turned on (engine off), and the intake tube is disconnected from the throttle body, you should be able to watch the throttle plate open and close in relation to the pedal angle.