mrsantafe
Zone Head
Posts: 521
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posted November 23, 2007 11:42 PM
injector ?'s
I was wondering how much hp can the stock injectors handle? I'm running a dry kit which i might choose to lean on heavy with the nos and don't want to max out the duty cycle.
Thanks, 02 zx12
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9.78@155.13 mph 1.71 60 ft @ a near mile high dragstrip
2006 ZX14 gone
2006 ZX10r (Wifes street bike)
2004 zx10r (her race bike)
2002 ZX12 (still kicking a--)
2007 gsxr 1k (race bike)
  
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entropy
Moderator
Posts: 8671
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posted November 24, 2007 04:07 AM
 Edited By: entropy on 24 Nov 2007 04:08
225hp = 87-90%dc on my motor
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capt10ed
Expert Class
Posts: 327
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posted November 24, 2007 04:50 AM
So if you have 190 to 195hp and you throw a 40 shot on top of it, the injectors could not supply enough fuel? And you stand the chance of running lean and blowing the motor.
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2014 Loring AFB 14 runs over 200mph
with a best of 208.1 in 1.5 miles
and 204.5 in the mile.
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psycho1122
Pro
Posts: 1608
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posted November 24, 2007 06:25 AM
quote:
225hp = 87-90%dc on my motor
Is this with the Muzzy Pump?
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You say PSYCHO like it's a BAD thing!!
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woppi
Pro
Posts: 1362
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posted November 24, 2007 07:13 AM
i think --- yes !
quote:
quote:
225hp = 87-90%dc on my motor
Is this with the Muzzy Pump?
i think ----- yes ------ muzzy pump !
woppi
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1st TFA Member / Austria !
" if it has wheels or titts - sometimes you will get troubles "
2000 Limited ZX12R NOS
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mrsantafe
Zone Head
Posts: 521
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posted November 24, 2007 08:14 AM
My motor dynos close to two hundred hp and i've added a 40 shot of nos. Entropy is the 225 hp actual hp or crank hp?
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9.78@155.13 mph 1.71 60 ft @ a near mile high dragstrip
2006 ZX14 gone
2006 ZX10r (Wifes street bike)
2004 zx10r (her race bike)
2002 ZX12 (still kicking a--)
2007 gsxr 1k (race bike)
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ninja12
Needs a job
Posts: 3310
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posted November 24, 2007 12:08 PM
Edited By: ninja12 on 24 Nov 2007 12:09
Entropy uses AM injectors.
220+ rear wheel on the Dyno.
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entropy
Moderator
Posts: 8671
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posted November 24, 2007 01:27 PM
Edited By: entropy on 24 Nov 2007 13:32
yep 220+ Dynojet hp,
with stock injectors dc=87-90;
with RC370's dc=70's& (don't remember exactly).
Muzzy pump.
capt:
as far as running lean at high dc???
I've seen logs from a busa running at dc=95% with AF 12.8 awhile running at Maxton.
If the injectors can consistently put out fuel at high dc you are good to go. Put 'er on the dyno and find out.
I generally use RC370's for slightly better perf at 10.5 -12k (thanks doug meyer) , but the OEMs do fine.
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tcchin
Zone Head
Posts: 867
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posted November 24, 2007 02:49 PM
The fuel pump should have no bearing on the injector duty cycle. You can increase the fuel line pressure by replacing the FPR, which will allow you to reduce your pulse width and thus duty cycle. The only thing you need to watch is that the stock fuel pump on the early models is barely capable of supplying enough fuel volume at the stock pressure to support >180 bhp, particularly if the fuel pump has worn at all. Increasing line pressure with the stock pump is not recommended.
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capt10ed
Expert Class
Posts: 327
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posted November 25, 2007 09:25 AM
Where and how do I check the duty cycle of the injectors?
____________
2014 Loring AFB 14 runs over 200mph
with a best of 208.1 in 1.5 miles
and 204.5 in the mile.
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entropy
Moderator
Posts: 8671
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posted November 25, 2007 10:01 AM
powercommander software shows it to you, but for the high dc's you really need to put it on the dyno underload
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lonniemac
Expert Class
Posts: 225
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posted November 28, 2007 12:28 PM
i have muzzy pump and 2000 stock injectors and i am running 240 hp with no lean conditions
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psycho1122
Pro
Posts: 1608
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posted November 29, 2007 06:36 AM
Muzzy Pump is needed to maintain proper fuel VOLUME through the rail. The stock pump starts to fall behind at high RPM when fuel is added/required via PC.
Here are my observed fuel flow rates:
Stock pump, 90 ml in 3 seconds
Muzzy Pump, 240 ml in 3 seconds
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You say PSYCHO like it's a BAD thing!!
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psycho1122
Pro
Posts: 1608
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posted November 29, 2007 06:38 AM
mrsantafe; at least get the Muzzy pump and an injector clean and service. This will minimize the good possibility of a lean out situation.
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You say PSYCHO like it's a BAD thing!!
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mrsantafe
Zone Head
Posts: 521
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posted November 29, 2007 08:45 AM
I talked to Muzzy and they said there fuel pump was for 00-01 only. Kurt said i've got plenty of fuel pump 02 and newer. However, i have never cleaned my injectors in 5 years of ownership so i will definately get that done psycho1122. Where did you get yours done and price?
Psycho1122, i definately need to make a trip down to Az pretty soon. As soon as my Dry Nos is figured out. I would like to have Mark make a custom map for the juice.
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9.78@155.13 mph 1.71 60 ft @ a near mile high dragstrip
2006 ZX14 gone
2006 ZX10r (Wifes street bike)
2004 zx10r (her race bike)
2002 ZX12 (still kicking a--)
2007 gsxr 1k (race bike)
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psycho1122
Pro
Posts: 1608
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posted November 30, 2007 06:44 AM
RC Engineering....$20-25.00 per injector.
My bad on your pump. I forgot the 02's and up have a revised pump.
____________
You say PSYCHO like it's a BAD thing!!
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