addisonzx12
Expert Class
Posts: 213
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posted November 10, 2003 02:33 PM
What air/fuel ratio for a dry shot
Wondering what a/f ratio to tune for? 13.0/1, 13.5, 12.5? On the dyno with a sniffer. At what point can you run into problems? Added 15 points on the pc3, with a .036 NX jet & the sniffer showed a A/F ratio of 13.8/1! I thought adding 15 points would of got me close, but nope. Still too lean.
  
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your car is slow
Needs a job
Fuck Nitrous...Got Boost?
Posts: 4089
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posted November 10, 2003 03:04 PM
I keep it below 13 on spray.
13.8 is a good start...but not where id want to be.
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Do not taunt happy fun ball!
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RAC4IT
Needs a job
Bergie
Posts: 3009
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posted November 10, 2003 03:35 PM
With a .036 jet you better see some 24-28s in the tables to keep it on the safe side. I'd say add +10 to where your at now should be fine.
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addisonzx12
Expert Class
Posts: 213
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posted November 10, 2003 04:56 PM
The problem is I was at a +38 in the map when it was at the 13.8/1. I added 7 more so I am maxed out at 45! The 9500 cell. The other cells I have some room left to add fuel. Might have to put the .034 jet in? Hate to do it for just 1 cell though.
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your car is slow
Needs a job
Fuck Nitrous...Got Boost?
Posts: 4089
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posted November 10, 2003 05:11 PM
Eh..I run a 46 jet without having to add that much fuel (until max rpm ranges) and my A/F is in the 11s
I musta got one helluva pump with my 01
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Do not taunt happy fun ball!
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addisonzx12
Expert Class
Posts: 213
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posted November 10, 2003 05:20 PM
YCIS, What do you mean by Max rpm range? I figure it's because my bike runs 200hp without spray.
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your car is slow
Needs a job
Fuck Nitrous...Got Boost?
Posts: 4089
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posted November 10, 2003 06:49 PM
Max RPM ranges are from 9k up to 12,500 on the PCIII map
You only care about WOT fuel cells...the rest are irrelevant as you shouldnt be spraying when you arent at wot 
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Do not taunt happy fun ball!
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ZXALAN
Expert Class
Posts: 156
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posted November 10, 2003 08:13 PM
try adding some numbers BELOW the range you are lean at, it will spill over into the next range. Example: At 100% TP, If you are at 13.2-1 at the 9000rpm cell and you want to richen more, try adding numbers to the 8500 cell, it will richen up a broader range then you would think. IF you add say "5" more in the 8500 box, it will richen the 9000rpm range up .2-.3 or so. You have to play around with it at different places. Fuel curves are funny like that.
If you are maxed out and still lean, you have a fuel pressure problem or your injectors are not getting the signals. Double check everything well before you burn it up. Stay in the 12s on air fuel ratio, ESPECIALLY on spray, you will show a little less HP but you will run faster and be safer. Mine is at 12.6-12.8-1 from 6k-10krpms(busa) on spray. I gain 50hp on a single .36 jet with a "warm" bottle. :P
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nos rob
Novice Class
Posts: 63
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posted November 11, 2003 01:05 AM
A/F ratio may be all well and good on the dyno, but what happens to it at 100 to 150 mph with air ram?
I guess we are relying on the imbedded map in the computer to richen the fuel based on the speed vs gear?
If the speed vs gear map is richening up the fuel, on the dyno, our bikes are not receiving the extra air that we would be available if the bike was actually on the road, therefore the bike will be running richer on the dyno than it would be if it was on the road.
This is my question, are our bikes running lean on the road, whilst spraying?
Has anyone actually looked at an A/F gauge with the button pushed??
Does this make any sense, or am I too pissed???
NOS Rob
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NOS Rob
'02 Blue ZX12R NOS and extensions
'99 NOS stretched Bandit 1200S
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your car is slow
Needs a job
Fuck Nitrous...Got Boost?
Posts: 4089
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posted November 11, 2003 07:07 AM
Yes...I hooked up a wideband 02 sensor to the bike while originally tuning for nitrous.
I experienced easily a .5 to 1 full point leaner A/F ratio at speeds above 100mph than recorded on the dyno.
Then I took the bike to the dyno and did some comparisons with my wideband and the dynos wideband..they were dead on.
You certainly do lean out a bit more at speed...and im sure ambient air temperature is worth a few more tenths. Startin to get colder here in FL...time for a map change
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Do not taunt happy fun ball!
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VincentHill
Needs a life
Posts: 6520
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posted November 11, 2003 09:39 AM
Bergie is speaking from "2" Sources of knowledge! His own Green Bike and My Green bike! When we found that the NOS Back pressure in the nozzle was not allowing the fuel into the mix, Nick ran up the buttons on the PC3r and it all was fine! It looks like 11:1 was where it was max'd out on the buttons which is (as Bergie said) +10 and I had a "60" shot in the system! I ran Maxton and even hit the rev limiter (On the button) and no problems!
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Made History @ Daytona and still one fast old man!!
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RAC4IT
Needs a job
Bergie
Posts: 3009
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posted November 11, 2003 09:59 AM
there are some old nitrous maps on my site maybe try one of those
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addisonzx12
Expert Class
Posts: 213
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posted November 11, 2003 10:13 AM
Bergie, I have been on your site numerous times(nice site btw). Could never find the link to the maps. Dynos, videos, etc. but no maps!
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RAC4IT
Needs a job
Bergie
Posts: 3009
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posted November 11, 2003 12:13 PM
Hmm.. I must have left off a navigation pointer to the maps folder during one of my updates. Oh well, I will fix next time I update the site. Here is a direct link http://www.dontbescaredracing.com/dyno/maps there are some modified Muzzys 1361 maps and the originals that I experimented with.
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ninja12
Needs a job
Posts: 3310
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posted November 11, 2003 09:57 PM
Do you ride streets or are the maps race ( 100 % throttle ) based?
The 35's in the 0,2, and 5 % looks like it would be rich.
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rac4it
Needs a job
Bergie
Posts: 3009
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posted November 12, 2003 05:25 AM
Those 35's in the lower tables are straight off the Muzzys issued maps, I believe they are intended to reduce surging. Yes it would be rich. Yes I rode it on the street like that for a while. Every bike is different and I will tell you that even bikes with identical modifications require custom mapping, I can upload my current map if you like but it won't do you much good either. I was only showing you the 100% throttle tables for a safe nitrous map using .034 ~ .036 jetting, the rest of it is probably not applicable to your situation.
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ninja12
Needs a job
Posts: 3310
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posted November 12, 2003 07:29 AM
Thanks, yes i'd like to see your map.
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