Question about 383 Stroker tuning

**BlackWidowSS** · 08-05-2014, 01:05 AM

I wiped out my old tune for my 355 completely and used a stock tune file from a 95 Z28 because I converted my 97 SS to OBD1. I am now a 383 Stroker and I installed a set of racetronix 42# injectors...how important is it to update the Injector Offset vs Battery Voltage from the stock parameters to the parameters for my new injectors? What does this do exactly?

Also, since I am now a 383 instead of a 350, how important is it to change the engine size in the tune and what does this do?

Finally, i heard about changing my pulse width in my tune for my new injectors...how?

My car has been dyno tuned by a good tuner here, and managed 458 RWHP and 410 RWTQ, but he did not change any of the above parameters from the stock ones....necessary or no?

**Mystery Bird** · 08-05-2014, 07:05 AM

Most will say the stock injector offsets will work fine. I have found that by adjusting them correctly my car starts, idles, and cruises much better. I don't know how the PCM takes cylinder volume into it's calculations but I would think it's pretty important. It's very easy to change.