Are the times listed on the y-axis of the map for Battery correction expressed in microseconds, or milliseconds?

I had some dynamic flow testing done on my injectors and am inputting the data for dead times.

 

its milliseconds, MS is milliseconds, microseconds is abbreviated with a funky looking sort of ys but not really a y, just kind of looks like a y.

What where the results of your testing???

 

Well, they were pretty even dead time wise.

I'm still milling through the spreadsheets here (just got them a few minutes ago) but its pretty neat. I have a sheet for each pair (RC 750's and bosch 1600's) and a sheet for all together. Flow on the RC's is extremely close, less then .4% variance at 12 volts through ~18% duty up to 85% duty. 1600's were a little sloppier though ~1.0% diff through the same range. But that can be taken care of with the trims

Pretty neat stuff, Paul at Yaw Power did them up for me, he's the only place I've found that actually does it. $35 per injector, well worth it for the peace of mind too (at least in my opinion)

EDIT: dead times for the whole set go from about 1200MS @ 6V down to 540MS at 14V........

EDIT 2: I'm just goign to input the dead times for the whole set, the 750's times are fairly close to the times for the whole set, so the compensation should be *decent* (much closer then none at all) when running only on primaries.

 

even 1% is nothing, I have noticed the battery correction map helps a little at idle when the alternator can't keep up. It should make very little difference at speed. If it does then you need a bigger alternator.

 

Yeah, I doubt it'll make a massive difference cruising down the road, under load etc. considering how decent it ran with nothing inputted to the correction map. I mostly had it done to verify that the injectors were what they were supposed to be flow wise. This is just an added bonus.

Also, the flow charts give a good idea of what IDC's to avoid since flow becomes erratic above or below a certain percentage. I mean, its pretty obvious that happens, but neat to have an exact chart showing where/when.

 

Side note, most people call it a "u", and it's the Greek alphabet "mu".


-Ted

 

also really handy for cranking...