Elite 1500 K20 Dead Times

[stjohnsafc]

Hi all,

Got my K20 powered MR2 all buttoned up and running. Now just going the the smaller things in the config.

I have Bosch B280.436.038-10 Motorsport Injectors (566cc) which i acquired with test miles from a British Touring Car set-up. They are like new! My only issue is that i don't have any Dead Time/Latency data for them, and i cant get the info from Bosch either.

I'm hoping to send the injectors away for testing but from what i can ascertain, the result i will get back will be for 5 voltage ratings (8, 10, 12, 14 & 16v)

However, the K20 map i have has provisions for 13 voltages!

My question is, am i ok to delete columns from NSP for Battery Voltages? or do i need to populate all 13?

Thanks

[JimKden]

If you have Excel for spreadsheets, create a list from the data you receive and do a curve fit. Use the curve algorithm created to calculate the missing values for the ECU table.
Otherwise reduce the table to only those values provided from the test and let the Elite interpolate between the values.

Another method from a post on this forum, as follows:

"Get the car good and warm where temps, etc. are completely stable. Set open-loop and set the AFR to something like 14.7. Command a 10% increase in fuel. The AFR should go to 13.2. If it goes to a leaner spot, then your offset is too high. If it went too rich, your offset is too low."

The procedure above provides sufficient data to do an Excel plot and curve for other voltages.

The above procedure can also be used to check the data 3 points of data you paid for.

Most of the time the engine will be operating on a constant voltage so at other voltages, if the dead time is not perfect, it won't be noticed or affect operation. Cranking will pull system voltage down to about 10 volts but as soon as it fires up, the voltage comes back to about 13.5v.