helly

I just did a flow test on my 550cc denso injectors. The guy testing them, told me that they're actually 700cc @ 2.4 bar.
The MS is configured for 550cc and my AFRs are ok. What effects will this have on my tune / driving? I'm guessing the autotune function would have had a hard time calculating changes if the injectors are so much bigger then configured ?

Should I just change the injectors settings to 700cc (req_fuel calc etc) and run autotune for a while?

I'm having a hard time imagining the effects of this error.. The injectors are engraved with 550cc, and I bought them as 550c. Guess I'm lucky it's not the other way around.

The car idles fine, so I haven't really noticed any problem..

Edit: I have a MSPNP90-93. Bigger fuel pump, IC, M45 and IAT.

DNMakinson

iTrader: (3)

If you are finished tuning, and you never plan to change injectors, I'd leave as-is. In the end, it's just a number.

Auto-tune used the AFR reported by your wide-band O2 to adjust the VE table. It has fully taken into account the erroneous (if it is indeed erroneous) Req-Fuel value.

Side Comment: I don't understand 2.4 Bar. Return type Miata injectors operate at 3.0 bar.

DNM

helly

Thanks for the input. It makes sense.


The shop tested them at 2.4 bar.