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Why are throttle tables different for different calibrations

Posted: Tue Aug 10, 2010 12:33 pm
by ajpturbopittsburgh
Some people say the flashpro increases throttle response and helps the lag inherent to this drive by wire system. I don't see how it does this. I started looking at the throttle tables in different calibrations within the software and there are vastly different setups in the cals that come with the flashpro software.

Why is that?

I understand the throttle tables and that it simply maps the relationship between the throttle pedal and the throttle plate opening.

But my question is if you were at for instance 50% throttle why would you want anything other than 50% throttle?

I see the tables may say at 5000rpm and light load 50% throttle will only yield 39% throttle body opening. If I push the pedal in 25% that's because I wanted 25%

What would happen if I set up the tables in a linear way? i.e. 10%=10%
and 20%=20%
50%=%50 and so on....That would seem to make sense to me, would it not?

Posted: Thu Aug 12, 2010 9:01 am
by Hondata
Some vehicles have a linear relationship between the throttle pedal and throttle plate and some do not. If you look at cable throttles the throttle cam is usually designed so that you get more sensitivity at lower throttle openings to make driving smoother. The DBW throttle tables does the same thing.

Posted: Thu Aug 12, 2010 9:57 am
by ajpturbopittsburgh
Ok, so there is no harm in creating a linear throttle table? Would I just expect less smoothness and possible more jerkiness?

Is this something that would help with DBW lag?

Posted: Fri Aug 13, 2010 9:11 am
by Hondata
Yes, linear tables can be used.

It depends what you mean by 'DBW lag'. DBW is always going to operate slower than a cable throttle.