I have Racetronix 37# fuel injectors. 1 year old, not the brand new ones.

In diagnosing rich idle even in open loop, I noticed my injector offsets are still at stock settings in my new tune. Seems my tuner only changed the flowrate, even though he said he had the constants, too.

Since these are a different, faster-reacting style of injector from stock (right...?), I'd think the offsets should be different. But I can't find the specs on the web, or here.

Does anybody have a good tune with these injectors, of know the values? They can be found in the Injector Offset vs Battery Voltage table.

Also:
I found the flow constant may be wrong, too. Tuner used the flow value from Racetronix at 43.5 psi (37.27#/hr.) but that is flowed with n-heptane. Gasoline flows more, & the correction is x 1.035 for gas, per Racetronix on their 32# injector spec page. If I change this now, will it screw up my WOT A/F ratio?

Thanks!

 

I have those injectors on a stock engine, and I did not change any injector values but the flow rate and they work fine.

I ended up at 37.46 for the flow rate after some fiddling.

So, I don't think injector settings are your problem.

 

Great, nice to know. One more possibility eliminated. Thanks!

 

JP95ZM6:
I'm thinking of buying a set of the Racetronix 37 lb/hr injectors. Were you able to get any definitive answers on rates and constants for them?