Hondata

I have tuned a customerss car on the stock MAP sensor.

I know he'll be back to add boost. (beyond the stock sensor's range)

Must I re-map/tune the ecu, like the older Hondata systems?
(I've been tuning Hondata since ~'99, ROM Editor 2.x)

I don't mind fiddling with the MAP sensor 'calibration' some but
having to re-map the car is ~tedious.

For Reference:
2004 USDM RSX-S
Hondata K-Pro
Turbo parts


-Jeff

Well, if you're using different injections when adding boost, you should be starting with a new base map that closest match those injectors to begin with so your existing map may be worthless.

I certianly suggest you wait for hondata to respond to this but let me chime in and say that on the rsxs I don't think people generally do when just changing map sensor. If a wideband is used, all you really need to do is drive around a bit and ensure closed loop is working and the long term trims haven't really changed. On the K series with k-pro, the long term trim does NOT affect open loop operation and having your long term pegged at some number will not affect you in boost -- this is what hondata has said in the past.

If I was in your shoes, what I would do is add 5% fuel to columns 8, 9, and 10 and then double check that N/A wot is now in the 12s for a few pulls with no boosting, then tune boost. I'd then ensure that closed loop isn't to far off by driving around a bit.

Personally I cannot relate to what you're doing however since both of the new boost installs on rsxs I've been a part of required a new base map to begin with due to the injector change.

Wayne

There shouldnt' be too much you have to change, but you should verify the A/F ratio to be sure that there are no changes that need to be made.

Thanks for the replys....

I realize with an inj. change I will likely re-map the car.

My question relates to changing the MAP sensor specifically.

In the Older Hondata RomEditor the column lables/lookup
changed when you changed the MAP sensor, but the data in the
table doesn't ~move. Thus the 'new' map is now ~wrong.
i.e. the tables are a 'voltage' lookup.

My HOPE is that K-pro maitains the table Load look-up
axis and performs the MAP pressure conversion ~before the
table look-up in the code. This keeps the tables 'in-tune' such that
all I need to do is verify the map/pressure conversion.
i.e. the tables are a TRUE pressure look-up.


-Jeffrey Atwood

As long as you use the correct offset and multiplier for the MAP sensor, no re-tuning is required.