VincentHill
Needs a life
Posts: 6520
|
posted June 30, 2008 04:27 PM
2006 Kawasaki 636R Air Fuel Ratio and HP
A freind of mine has this bike and it is making about 117 HP with a LeoVince but the A/F is running about 14.5 to 16.5 A/F! I added about 20% more fuel and got into the 13.5 A/F and down to 114 HP!
Where should the A/F be on these? This Lean? What is good HP SAE on a Conservative Dyno!
____________
Made History @ Daytona and still one fast old man!!
  
|
KZScott
Needs a life
high on speed
Posts: 7235
|
posted June 30, 2008 05:54 PM
you know the saying, "they allways work the best before they break"... i think in this case its before it melts.... i wouldnt think that they should be any leaner then normal, but i could be wrong...
____________
01 ZX-12R 8.84 @ 156.3 no bars, DOT tires. Pump Gas, NA.... turbo 8.47 @ 164.
00 ZX-12R 8.62 @ 165.2 no bars, slicks, Pump Gas, 55 shot.... turbo 8.32 @173
00 ZX-12R Fastest NA Kawasaki in the world 1: 222.046 1.5: 226.390 Loring AFB
00 ZX-12R street turbo 1: 227.9 1.5: 234.1 Loring AFB
00 ZX-12R LSR turbo 1: 263.1 1.5: 266.5 Loring AFB Worlds fastest ZX-12R
CMG Racing RCC Turbos
|
VincentHill
Needs a life
Posts: 6520
|
posted July 01, 2008 05:43 AM
quote:
you know the saying, "they allways work the best before they break"... i think in this case its before it melts.... i wouldnt think that they should be any leaner then normal, but i could be wrong...
I am in your Camp! Somehow I cannot imagine the system designed to run LEANER than the Cars do! the Monitor only goes to 18 to 1 and it is half way through the run before I see the Numbers moving! My personal feeling is that he has the Wrong Map (Maybe the 2007 map for the 2006) I will let you know!
____________
Made History @ Daytona and still one fast old man!!
|
VincentHill
Needs a life
Posts: 6520
|
posted July 01, 2008 11:18 AM
Finally spoke to the Tech person at Leo Vince and I feel better now! He feels and is right that there is AIR in the readings! Either caused by a short tube or bad filters and Reeds! The Filters and Reeds have never been changed and the Tube is only 1.6 inches long now! Needs to be 2.5 to 3.0 feet long! He said that even the cars are only at 14.7!
Thanks KZ
____________
Made History @ Daytona and still one fast old man!!
|
tcchin
Zone Head
Posts: 867
|
posted July 01, 2008 12:06 PM
 Edited By: tcchin on 1 Jul 2008 13:11
Maybe that's why the guys at Factory Pro tune to best hp and not to an AFR. I've seen most DJ dyno operators clamp the air injection tubes during a tuning session to prevent excess air in the exhaust.
BTW, most SAE papers on AFR show max power at about 12.6:1, at the expense of fuel economy.
http://www.stealth316.com/images/fic-af-emissions.gif
http://www.buckeyetriumphs.org/technical/Carbs/UsingAFMonitor/FIG2A.jpg
|
johnnycheese
Pro
Posts: 1008
|
posted July 01, 2008 02:19 PM
I like 12.8
____________
Builder and tuner of some of the fastest N.A. and P/A Hayabusas and ZX12 /14 in Texas
|
VincentHill
Needs a life
Posts: 6520
|
posted July 01, 2008 02:49 PM
Thanks Guys, one thing for sure is we ALL Know it is not 14 anything!
I also like 12.8 on the Dyno because in the real world the extra strength needed to pull yopu and air resistance makes it run leaner yet!
____________
Made History @ Daytona and still one fast old man!!
|
tcchin
Zone Head
Posts: 867
|
posted July 01, 2008 03:23 PM
You mean richer.
|
tcchin
Zone Head
Posts: 867
|
posted July 01, 2008 03:26 PM
I'm not sure how accurate the Bazzaz Z-AFM device is, but 12.8:1 was visibly slower than 12.4:1 on the race track. It's hard to argue with lap times and trap speeds, even if you have dyno data.
|
KZScott
Needs a life
high on speed
Posts: 7235
|
posted July 01, 2008 04:31 PM
interesting stuff... i love this forum 
____________
01 ZX-12R 8.84 @ 156.3 no bars, DOT tires. Pump Gas, NA.... turbo 8.47 @ 164.
00 ZX-12R 8.62 @ 165.2 no bars, slicks, Pump Gas, 55 shot.... turbo 8.32 @173
00 ZX-12R Fastest NA Kawasaki in the world 1: 222.046 1.5: 226.390 Loring AFB
00 ZX-12R street turbo 1: 227.9 1.5: 234.1 Loring AFB
00 ZX-12R LSR turbo 1: 263.1 1.5: 266.5 Loring AFB Worlds fastest ZX-12R
CMG Racing RCC Turbos
|
VincentHill
Needs a life
Posts: 6520
|
posted July 01, 2008 04:45 PM
quote:
You mean richer.
No Effectively Leaner! The Harder the engine works, the More fuel it uses and needs. If you have 12.8 under no load and put a load on it like the rear brake the A/F goes UP! To accelerate a load you need more fuel to WASTE hence the use of Accelerator Pumps and the fuel I put into the Zero Throttle Position of the map so that when I let off to shift gears I get some extra fuel to accelerate.
This is what works for me from what I have seen! Also watching the car racing you see huge flames of over rich into the corners so that they can get out of the corners with that "Extra" Fuel!
Hence the 12.4 will accelerate better than the same bike with 12.8 to a certain point where the accel decreases and the REAL HP is needed to continue it is too rich! Everything is a Compromise
____________
Made History @ Daytona and still one fast old man!!
|
tcchin
Zone Head
Posts: 867
|
posted July 01, 2008 09:34 PM
Agree about the fuel requirements vs. load. I think I misunderstood the point you were trying to make, thinking you were extrapolating from 14:1 to 12.8:1 to something richer.
|
|
|
HOME
NEW TOPIC