hornetball

iTrader: (4)

..

Baker99miata

iTrader: (4)

what does that mean?

hornetball

iTrader: (4)

Nothing. Just wrote something that I later thought wasn't correct.

AdoboMiata

iTrader: (3)

So,

(Red top nb1) 240cc / 1000cc * 12.7 (from base map) = 3 (3.04) new req_fuel?

SchmoozerJoe

iTrader: (2)

old injector / new injector * req_fuel

Existing req_fuel = 12.7
old = 240
new = 1000
old/new = 0.24
0.24 * 12.7 = 3.048 or 3.05.

So, yes. 3.05 for your req_fuel.
This will leave your existing VE table "close" with the new injectors.

I'm guessing you'll want to VEAL for a bit again, though I've never sized up injectors with an aftermarket ECU before.

hornetball

iTrader: (4)

The above gets you going with new injectors. After you've tuned a bit, you can follow my procedure to find a better "Req Fuel" and get more resolution out of your VE table.

DNMakinson

iTrader: (3)

If you know the dead time for the new injectors, key that in as well. If these are ID injectors, I understand they are supplied with low pulse corrections. That's the least important, but you can research that if you do have the information.

SchmoozerJoe

iTrader: (2)

I just redid my VE tables, following Hornet's advice and wow... between that and switching over to sequential injection, the car car feels much smoother now.

Time to go VEAL for a bit and take more advantage of this!

Hernj65

I know this is an old thread and sorry if this is frowned upon but I had a question about the calculation. I too have moved to 1000cc injectors but do you do the calculation with the nb fuel pressure. What I mean is that I bought fuel injector clinic 1000cc injectors that are actually tested at about 969 at 3 bar. At 4 bar which I believe the nb fuel pressure is it shows the flow is 1118 so based on the megasquirt base map do I do old injector/ new injector flow rate at 4 bar and then times it by my base map requires fuel or just use the size flow at 3 bar which is 969?

Braineack

iTrader: (62)

use the flow rates at 60psi.