keith
Expert Class
Posts: 155
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posted February 21, 2007 07:56 AM
ZX12 A1 injectors
Anybody know the spec of the first model 12R injectors. I'd like to know the flow rate and whether the later ones flow more and will they fit an A1 model. I've got a Muzzy pump but want to increase the fuelling to up the gas a bit from 50 hp at the moment. I was thinking 100 hp shot. Ta guys, Keith
  
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entropy
Moderator
Posts: 8671
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posted February 21, 2007 08:47 AM
keith,
go into drag bike section. i have been fooling with injectors for a while...
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keith
Expert Class
Posts: 155
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posted February 21, 2007 09:39 AM
Thanks Entropy, have read the posts - so are u using your cleaned A1 injectors or the RC 370's?
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entropy
Moderator
Posts: 8671
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posted February 21, 2007 11:12 AM
370's
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dougmeyer
Needs a job
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posted February 21, 2007 02:24 PM
Karl-Save me the search. What was the result of the bigger squirts?
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entropy
Moderator
Posts: 8671
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posted February 21, 2007 03:09 PM
quote:
Karl-Save me the search. What was the result of the bigger squirts?
Doug,
I was searching fer yr cell # that afternoon when we couldn't get the USB to make neg numbers work; luckily DaveO had the right suggestion.
Thx for the tip on the 370's, they do work! A bit of a PITA to install, but [borat voice} not so much...
_____FactPro
rpm__"truehp"_duty cycle (was OEM inj, now RC370's)
3000___29___DC= was 15%, now 10%
4000___54___DC= was 23%, now 16%
5000___74___DC= was 23%, now 19%
6000___91___DC= was 40%, now 31%
7000__122___DC= was 50-51%, now 39%
8000__152___DC= was 61-65%, now 50-53%
9000__170___DC= was 71-73%, now60-61%
10000_175___DC= was 79-81%, now 72-73%
10500_176___DC= was 83-85%, now 75-76%
11000_175___DC= was 88-90%, now 78-80%
I used to have a dip in hp @ 10.5 & 11, then back up @11.5
went to RC370 injectors (thx to D Meyer & Lorcan for the advice) and the gremlin seems to be gone 
BIG, BIG thanks to Dave Owen:
When i started testing the 370's it was running WAY rich and changing fuel numbers in my brand new PC3-USB didn't help at all.
Dave suggested some tests which ended in simply putting my PC3R back in. Voila.
Weird: the USB worked fine with positive numbers, but didn't work with negative numbers.
Who'd a thunk it? Not me!
luckily DaveO and his cell phone were there for the noob-builder  !!!
current fuel map #'s w/3R and RC370's
RPM___100%
3000___-30
4000___-20
5000___-15
6000___-13
7000___-10
8000___-5
9000___5
10000__11
10500__12
11000__14
Now, after 5 days on the dyno, flogging the shit outa it, I'm gonna split the cases and take a peak
BTW: when i pulled it down, it was pretty evident i was leaking between cyl, but i'll fix that this weekend!
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dougmeyer
Needs a job
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posted February 21, 2007 09:22 PM
Ha! Tole Ya' . Don't know 'bout the
PC deal.
D.
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keith
Expert Class
Posts: 155
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posted February 22, 2007 08:08 AM
Someone mentioned the later model 12's (B6) use a bigger injector - about 390's I think - any truth in that?
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supra5677
Pro
Posts: 1279
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posted February 22, 2007 08:16 AM
yes 04-05 injectors for zx12r flow 380-390cc per minute.. however they dont hook up directly to an A model..
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supra5677
Pro
Posts: 1279
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posted February 22, 2007 08:29 AM
its frustrating that stock zx12r peak out at 10,000
piped and pc3rs peak out at 10,800
pumped 1375 or 1427 zx12rs peak out at 10,000 and table top
with the right cam this thing could rip to past 12,000 still climbing, the valve sizes are big enough
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dougmeyer
Needs a job
moderated
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posted February 22, 2007 08:44 AM
True, why do you think that the Muzzy 1427 Pro Stock ZX-12, went easily past that? But there is more to it, of course, than just the cam. That bike left the line with an 8" tire, on the bar at maybe 6-7500 and a slipper. Not a lot of low end there.
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Y2KZX12R
Needs a job
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Posts: 3762
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posted February 22, 2007 11:45 AM
Doug, what did they shift that prostock motor at?
What was the stroke and rod length?
How many rings did it have?
Gas ported pistons?
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deathpulse
Pro
Posts: 1688
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posted February 22, 2007 11:58 AM
WOW! I'm psyched!! I haven't done a lot of work to the ol 2000 12 in years. Right now she's got:
1. Muzzy full exhaust
2. PC-IIIr
3. K&N Filters
4. NO Kleen Air
Now - maybe I can do teh following:
1. Put in new cam (can't remember exhaust to intake or intake to exhaust but I'll look in here)
2. Extend rev limit
3. New Injectors (larger)
4. REMAP the sucka
Wonder what numbers I'll pull? she's good for 175.5 HP now...
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osti33
Needs a job
Posts: 2973
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posted February 22, 2007 12:24 PM
quote:
Doug, what did they shift that prostock motor at?
What was the stroke and rod length?
How many rings did it have?
Gas ported pistons?
+1
Inquiring minds want to know...pretty please Doug.
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entropy
Moderator
Posts: 8671
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posted February 22, 2007 03:22 PM
hmmmmmmm...
what cams & valves do they have (had)???????
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dougmeyer
Needs a job
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posted February 22, 2007 07:13 PM
Sorry. No details. Maybe Rob will share if he chooses. No magic bullets, just all the stuff we know works. My point is (and some obviously fully understands this) is that it's always a COMBINATION, a PACKAGE that will get you where you want to go.
D.
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Y2KZX12R
Needs a job
CompetitionCNC.com
Posts: 3762
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posted February 23, 2007 04:57 AM
Sorry Ryan, I tried. 
Doug, basically I really wanted to know what piston speeds were achieved while still having good ring seal. I think you figured that one out from the questions. I really didnt expect answers... but I was hoping.
Does RM get on here much any more? Havent seen him post in a while.
I'd really like to know the seat timing on the intake valve on that prostock bike.
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osti33
Needs a job
Posts: 2973
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posted February 23, 2007 08:28 AM
 Edited By: osti33 on 23 Feb 2007 08:30
quote:
Sorry Ryan, I tried.
Doug, basically I really wanted to know what piston speeds were achieved while still having good ring seal. I think you figured that one out from the questions. I really didnt expect answers... but I was hoping.
Does RM get on here much any more? Havent seen him post in a while.
I'd really like to know the seat timing on the intake valve on that prostock bike.
LOL! No problem Jim.
I saw Rob and talked to him breifly in Indy this past weekend. He was pretty busy so I didn't bug him a whole lot. We didn't talk much about the prostock 12. We did talk a little about the prostock 14. No details however.
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dougmeyer
Needs a job
moderated
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posted February 23, 2007 07:55 PM
The basic rotating/reciprocating assembly used on that bike was listed on the Muzzys web site as a kit for sale.
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