donzx12
Parking Attendant
Posts: 25
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posted March 04, 2011 06:43 AM
zx12 fuel pump external
cant get enough fuel to motor to run nos what fuel pumps u guys running. 1 have a 2000 zx12 1287 bore with 4mil crank cams and port work. runs good on motor but when i hit the nos wont take it fuel ratio is all over the place runs 9.0 159 on motor went 9.0 160 on nos.have a muzzy pump in it butt think i need externel pump with reg
  
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shiphteey
Needs a job
Posts: 2529
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posted March 05, 2011 09:38 AM
Have you thought about spraying wet?
You could also try bigger injectors but sometimes they don't run well down low without a fuel pressure regulator.
How much are you spraying?
A.
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Gemini Motorcycles
Topping out everything from Ninja 250s to nitrous ZX-14s.
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entropy
Moderator
Posts: 8671
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posted March 05, 2011 12:16 PM
on the Y2K you can mount an aftermarket FPR, jack the pressure up to 60psi, that'll help alot.
I ran that set up on my 1427 w/430 injectors.
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Shane661
Needs a life
Posts: 11494
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posted March 05, 2011 01:27 PM
 Edited By: Shane661 on 5 Mar 2011 21:50
That's a big motor that can easily use the larger injectors. Contact Jim Gilnack at Competition CNC and he set you up with some very good 430cc units that will also work well at low rpm.
You can keep your internal Muzzy pump, but I would switch to an adjustable regulator so that you can tailor the setup for your application. You didn't mention how/if you were adding fuel to compensate for the nitrous. Are you changing maps when you press the nitrous button? Do you run a really rich map while off-spray?
As to whether that will be enough fuel, it really depends on the power output while on spray. If you are currently running stock injectors, I would say that there is a good chance that you would have enough fuel by using the combination of an adjustable regulator and the 430cc injectors mentioned above.
However, as also stated above, you might want to consider a wet system.
Shane
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KZScott
Needs a life
high on speed
Posts: 7235
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posted March 05, 2011 02:40 PM
I thought that pump was good for 700ish hp?
whats your map look like and are you sure you arent just running out of injector?
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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
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TRNorBRN6001
Needs a job
Posts: 2021
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posted March 06, 2011 07:16 AM
Yep like they said above, either go wet or pump the fuel pressure. Going wet would eliminate a rich N/A map if you are not able to switch maps.
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TFA 200MPH CLUB MEMBER!
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KZScott
Needs a life
high on speed
Posts: 7235
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posted March 06, 2011 10:37 AM
Edited By: KZScott on 6 Mar 2011 18:37
was just thinking about dads setup, and I know your pump is not the weak link, it must be the injector size or the mapping
2000 stock pump, stock fuel pressure, stock injectors, 1287cc 12.8:1 CR, head clean up job by me, stock cams, K&Ns, Muzzy SW
50 hp direct port dry shot. i think theres 25s in the upper range on the map. 91 octane pump gas
made a 250 pounder go 161mph, and was running out of gear just before the traps. pretty good air that day, i think his best mph on motor was 147. usually in the 144-5 range in the heat of summer
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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
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Shane661
Needs a life
Posts: 11494
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posted March 06, 2011 10:42 AM
Edited By: Shane661 on 6 Mar 2011 18:50
I found that on my 1287, with stock fuel pressure, that I was exceeding 90% duty cycle by 3rd gear, with +19 in the PC cell. This was on pump gas with around 12.9 afr. My bike, at least, tends to require more fuel as the speeds rise.
That is why I was unable to fully test it's top end last year. I never increased the fuel pressure. Mine is an 02.
Shane
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donzx12
Parking Attendant
Posts: 25
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posted March 07, 2011 06:13 AM
fuel pump
i have a dry kit with 42 jet injectors. were at around 60 % duty cycle. have a 2 stage map tryed taking timing out and changed fuel ratio. just getting back to it after winter. what size are stock injectors. it made 232 at rear wheel. when tryed nos afr goes rich then lean then rich cat get it to stay. runs perfect on motor. were can i get fpr and injectors. thanks for help.spent most of last year getting clutch and chassie tuned need to pull motor motor and ck bearings have about 30 runs at track and 10 dyno runs. how are they holding up. whant to get fixed before i pull motor. thanks
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KZScott
Needs a life
high on speed
Posts: 7235
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posted March 11, 2011 10:17 PM
42lb/hr? 440cc?
stock is 330cc
are you looking for a replacement for the stock FPR?
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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
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