got my MSNS-E up and running on the 240sx with EDIS the other day and have been fine tuning since then. One thing interesting I noted when setting my idle was the difference between 2 squirts/alternating and 2 squirts/simultaneous : using simultaneous the car runs significantly better.
Im using the flyback board on 4- 370cc low impedance injectors.
PWM % is set at 41 and time threshold is 1.3
using alternating injection my idle PW was 3.7 ms at ~13.0 AFR. With the accel bins tuned, the engined hesitated slightly off idle before revving smooth straight to redline.
When i switched to simultaneous injection, AFR went to 13.5, no more stumble, and a great smooth pull all the way to red. PW was 1.9ms.
My question, is it ok to run my injectors on simultaneous like this as the manual says to try to keep the idle pw above 2.0ms? The engine idles so much smoother with simultaneous i hate to change it. the car has a rev limit at 6200rpm and a max power production ~350 crank hp.
alternating Vs. Simultaneous injection
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Read the manual to see if your question is answered there before posting. If you have questions about MS1/Extra or MS2/Extra or other non-B&G code configuration or tuning, please post them at http://www.msextra.com The full forum rules are here: Forum Rules, be sure to read them all regularly.
Forum rules
Read the manual to see if your question is answered there before posting. If you have questions about MS1/Extra or MS2/Extra or other non-B&G code configuration or tuning, please post them at http://www.msextra.com The full forum rules are here: Forum Rules, be sure to read them all regularly.
The > 2.0ms at idle recommendation is due to the fact that it's difficult to tune the idle area at low pulse widths given the 0.1ms resolution of the standard code. That said, if you're happy with the setup in simultaneous at 1.9ms, there is no need to change.
FYI, of a 2.0ms idle pulse width, half is normally taken by opening time, which leaves an effective pulse width of only 1.0ms. Small changes in the VE table in the idle area may have no effect on final pulse width due to the large step size. For more background on this issue, check here.
Roger.
FYI, of a 2.0ms idle pulse width, half is normally taken by opening time, which leaves an effective pulse width of only 1.0ms. Small changes in the VE table in the idle area may have no effect on final pulse width due to the large step size. For more background on this issue, check here.
Roger.