I have been looking at several dyno charts and it is looking like 13.1 to 13.2 AFR seems to be where the bikes are making the most power. Are these good numbers?
Some junk & stuff on my bike and a hole in my head for riding it!
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Page: 1
Created on: 05/12/14 12:59 PM
Replies: 11
HB3BUTLER
Location: Raleigh NC
Joined: 11/02/13
Posts: 74
Hub
Joined: 02/05/09
Posts: 13802
RE: The Magic Number... AFR
05/12/14 3:19 PM
AFR Values & Characteristics in Four Stroke Engines
Out of Range:
6.0 AFR - Rich Burn Limit (engine fully warm)
9.0 AFR - Black Smoke / Low Power
Best accel mode number to aim for:
11.5 AFR - Best Rich Torque at Wide Open Throttle
Best Smooth Torque:
12.2 AFR - Safe Best Power at Wide Open Throttle
13.3 AFR - Lean Best Torque
Best Economy:
14.6 AFR - Stoichiometric AFR (Stoich)
15.5 AFR - Lean Cruise
16.5 AFR - Usual Best Economy
Out of Range:
18.0 AFR - Carbureted Lean Burn Limit
22.0+ AFR - EEC / EFI Lean Burn Limit
http://www.afrplus.com/AFRplus-unit-functionality.asp
12 is way rich.
13 and change is more a compromise.
14 is back to better gas mileage.
14.2 is about where stock burns.
16.1 burns with PAIR before the cat.
@ 12 I've never seen the bike's tank empty that fast, but that is some smooth running [the richer].
@ 13 I run at this crispy smooth area. I would have to agree somewhere at those numbers you mentioned.
@ 14 I'd pull the connectors and am back to stock: if I needed to run long distance with few gas stops.
Tormenting the motorcycling community one post at a time
HB3BUTLER
Location: Raleigh NC
Joined: 11/02/13
Posts: 74
sweetfa65
Location: South Australia
Joined: 07/22/13
Posts: 371
RE: The Magic Number... AFR
05/12/14 5:15 PM
I was wondering the same thing.
Look ahead, relax & GO HARD!
2013 ZX14R SE ABS (aka:ANIML).Polished wheels,Supersprox sprocket,clear filmed paintwork,frame caps,rear seat cowl,ceramic coated Akrapovic headers,carbon Yoshimura R77s,H9 modded lighting,Zero Gravity screens,Ventura rack,tinted lenses,Genmar risers,Throttlemeisters,Pazzo levers,custom stainless radiator guard,Yoshimura fender eliminator,Woolich Log Box Pro,Zeitronix O2 controller,ECU flash.
2013 ZX14R SE ABS (aka:ANIML).Polished wheels,Supersprox sprocket,clear filmed paintwork,frame caps,rear seat cowl,ceramic coated Akrapovic headers,carbon Yoshimura R77s,H9 modded lighting,Zero Gravity screens,Ventura rack,tinted lenses,Genmar risers,Throttlemeisters,Pazzo levers,custom stainless radiator guard,Yoshimura fender eliminator,Woolich Log Box Pro,Zeitronix O2 controller,ECU flash.
Smokinzx14
Joined: 07/01/09
Posts: 239
RE: The Magic Number... AFR
05/12/14 6:47 PM
What I and others have found is a gen 1 zx14 likes 12.9 to 13.1 to make best power at the strip NOT dyno .. But for some reason the zx14R likes 13.4 to 13.5 to make the best power at the strip NOT dyno .. It seems funny that the two engines that seem to be close in design use a total different tune ( AFR ), but really the two motors are very different , longer stroke , better combustion chamber, bigger cams and different timing and fueling in the ECU ..
2012 ZX14R Best ET 8.43 , Best MPH 164.95 ..Stock motor on pump gas ..Updated 8.42@163.95
Brocks Alien Head , P/C with Brocks street map , Brocks / Guhl Flash ..
Brocks dealer , see me for smokin deals on Brocks go fast parts @ ZX1441R.com
Brocks Alien Head , P/C with Brocks street map , Brocks / Guhl Flash ..
Brocks dealer , see me for smokin deals on Brocks go fast parts @ ZX1441R.com
Hub
Joined: 02/05/09
Posts: 13802
Romans
Location: Toronto,ON
Joined: 02/13/09
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HB3BUTLER
Location: Raleigh NC
Joined: 11/02/13
Posts: 74
Hub
Joined: 02/05/09
Posts: 13802
I'm going to tether up, make me a few maps. One at the .4 and the other at .79... Then autotune those mothers.
See if 'Mikey likes it'PaulAB
Location:
Chicago Metro, Far North
Joined: 02/12/09
Posts: 405
Hub
Joined: 02/05/09
Posts: 13802
KoflaOlivieri
Location:
Philadelphia, PA
Joined: 02/17/12
Posts: 1805
RE: The Magic Number... AFR
05/13/14 6:29 PM
US ELECTRIC bike maker Lightning Motorcycles is promising to unveil the world’s fastest production motorcycle this Saturday.
I can't wait t see this. 
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