No I've drove without this for 3k miles on his maps. This is only if you want an added boost in performance
PCV setting Accel pump
- Thread starter travisH3
- Start date
So I changed the throttle position to 60%, duration to 300 and kept the 16%. Im not sure if I felt much difference? I want to slowly increase the duration because i didnt want to go straight to 900 and be caught off guard. Is this gonna make the bike power wheelie? Ive never really tried to power wheelie but the bike doesnt feel like its gonna lift when i go full throttle. Im lowered in the front also so that helps keep it down too.
I need to tinker with mine a bit too. Taking her for inspection today so I need to put dB killer back in. Don't know that they really care, but only takes a minute and will come right back out. Then I'll play with the settings a bit.
Any duration more than a second is taking this function beyond emulation of an accelerator pump. Richer than the lean factory settings is good, but only to a point. The general fuel map should take care of this. Adding even more fuel through the accelerator pump function will not give you any more power if your fuel map is correct.
engineered2win
New Member
Completely correct. The pcv accel enrichment functions very similarly to a carb. It's pretty crude compared to any decent standalone, but it works nonetheless. This function is ONLY for transient throttle position. This should be functioning for a fraction of a second, while the throttle blades are rapidly moving. The rapid change in charge flow can cause a lean condition. This should not be a bandaid for a poorly tuned fuel map. 8 seconds of accel enrichment is absurd. Either your fuel maps are too lean, or you are overly enriching.
I was doing the same, but now have it back to proper values
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my local dealer does live dyno tuning, wonder if its worth it or if id see any improvement over marthys maps. I dont need more power but heck its fun to have it if needed
I still have mine set at the values the Marthy told me when I first got my PCV.
I tried 25% throttle, 50 duration and 18% this past weekend. This function helps throttle response. It's no magic power button. You know how it feels when you have too much free play in your throttle (or the factory recommended free play)? There's a fraction of a second of hesitation when you goose the throttle. The accelerator pump function gets rid of that.
I changed mine to the same as yours and went out for a ride. rode 113 miles and felt no difference. I think im just gonna turn the accel pump off because no matter what i change it to it doesnt feel any different