Hey folks,
I put some freshly rebuilt NB2 injectors into my Miata before I started tuning the MS3.
I used 265cc/min as the flow rate for calculating required fuel. However, I just found the report from RC Eng and they indicated that the flow rate of the injectors on their test setup was ~280cc/min.
Should I update the number for the required fuel calculation, or is the standard 265cc/min number more accurate for real-world conditions?
Thanks

 

I'd probably leave it at 265cc/min. There might be a difference in fuel pressure between their test rig and your car which could account for the readings but even if not and your injectors really do spray about 5% more fuel than they're intended to, when you start to tune, the VE table created will contain the correction needed to make your injection pulses right.

 

If you just started the tune and you anticipate that your long term plans will have you change injectors then I’d consider changing the flow rate. If not, let that dog sleep.

 

Thanks for the advice. No plans to change injectors. Will keep the value as-is at factory specified flow rate.