Print Page - S&S 475 Cam Injector Timing

Title: S&S 475 Cam Injector Timing
Post by: Bull_Calf on September 30, 2022, 08:07:17 AM

Can someone please tell me the best injector timing for a M8 114, Thundermax tuner, S&S 475 cam?

Title: Re: S&S 475 Cam Injector Timing
Post by: hrdtail78 on September 30, 2022, 08:12:13 AM

5.5's from the dealer. Proper angles and spray pattern.

Title: Re: S&S 475 Cam Injector Timing
Post by: Bull_Calf on September 30, 2022, 08:37:18 AM

Thanks for the reply hrdtail78, but I was wondering in degrees on basic settings on the Thundermax.

Title: Re: S&S 475 Cam Injector Timing
Post by: hrdtail78 on September 30, 2022, 09:15:35 AM

Gotcha, well IME with calcs I have played with. They really only get you in ball park. To find the best timing. I get close with calcs or what Tmax suggests. Then I tune idle for target. Turn off any closed loop and change this timing 5 at a time. If AFR goes richer for same injector opening. Means you have moved the timing to a more efficient angle. Keep adding or taking away until the point of diminished returns.

Title: Re: S&S 475 Cam Injector Timing
Post by: Bull_Calf on September 30, 2022, 11:03:46 AM

Ok. Thanks for the suggestion.

HarleyTechTalk

Dyno & Tuning Zone => AFR & Tuning Zone => Topic started by: Bull_Calf on September 30, 2022, 08:07:17 AM