spencercyclecom
Zone Head
Posts: 535
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posted May 10, 2005 08:34 PM
zx12r oil pressure
anyone CHECKED the oil pressure on a ZX12r at idle (1200-1300rpm) at operating temp?????
what you got? I think all will be amazed....at the results!!!!!!!!!!!!! maybe SHOCKED!!!!!!!!!! I know you guys that will find out...will NOT be running the shiznit out of a hot engine or reving the shiznit out of it!
what cha got CHEEZE head...I know you have done this??
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Doug Ray
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zrxdean
Needs a job
Posts: 2225
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posted May 10, 2005 08:44 PM
I set my idle high on the ZRX to get me about 18-20psi hot. I bet it's way low at 1200rpm.
How's the dialing in going Doug? You coming to the NOPI race in West Palm in June?
Dean
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spencercyclecom
Zone Head
Posts: 535
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posted May 10, 2005 08:54 PM
no NOPI for me in west palm...they are not running our class there.....next one for me is Bristol.
How high is your high idle???? 500rpm more than 1200?????
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Doug Ray
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zrxdean
Needs a job
Posts: 2225
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posted May 11, 2005 06:22 AM
No tach on it right now, but about that probably. Why?
You going to St Louis?
Dean
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spencercyclecom
Zone Head
Posts: 535
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posted May 11, 2005 06:34 AM
no ST Louis either...... to far and we didnt sell but $290.00 there last year. PROSTAR needs to cancell that event.....with the price of gas and fuel I know of alot of teams that are not going. INDY will be the next Prostar race for me. ALot of us asked Prostar to kill the St. Louis event and run it at G-VIlle at the end of the season.....they said no..so we will see how many go.
Thats a $625.00 fuel bill alone...not to mention the food ect ect
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Doug Ray
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psycho1122
Pro
Posts: 1608
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posted May 11, 2005 07:32 AM
Hell Yeah! It's darn low!
At @ 180-210 deg. w/ Mobil 15w50 oil I'll get 7-10 psi at 1200 rpm.
I also get 10 psi every 1000 rpm untill 8000.
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Ra12r
Zone Head
Posts: 919
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posted May 11, 2005 08:03 AM
DANG that is low!!! What can be done to get more pressure at lower RPM's? What about a replacement pump?
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your car is slow
Needs a job
Fuck Nitrous...Got Boost?
Posts: 4089
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posted May 11, 2005 08:08 AM
id just planned on upping the idle till I got something respectable....
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spencercyclecom
Zone Head
Posts: 535
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posted May 11, 2005 02:27 PM
YCIS,,
that would be a idle of 4000rpm to get 20psi when hot
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Doug Ray
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SpencerCycle Center Inc.
Spencer Performance Group Inc.
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johnnycheese
Pro
Posts: 1008
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posted May 11, 2005 02:46 PM
the oil light comes on at 5-7 psi. just above that is what i have found when HOT
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Builder and tuner of some of the fastest N.A. and P/A Hayabusas and ZX12 /14 in Texas
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kcadby
Pro
Posts: 1733
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posted May 11, 2005 04:07 PM
Scarry huh???
I CHECKED the the pressure on the 1361 I built...gauge goes on EVERY motor I build before they are started the 1st time  
FREEKED me out on the dyno after it "warmed-up"!?!?!?
DEAN'S ZRX idles at about 1,700 when we run it on the dyno...
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your car is slow
Needs a job
Fuck Nitrous...Got Boost?
Posts: 4089
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posted May 11, 2005 04:54 PM
4k? I thought homeskillet said it went up 10psi for every 1k rpm.
If this is true..and at idle its only at say 8psi...how on earth does the masterlube even work on a 12?
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Do not taunt happy fun ball!
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spencercyclecom
Zone Head
Posts: 535
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posted May 11, 2005 05:40 PM
the accumulator is used to prevent air gapping the pickup on accel and decel
I am looking into a big oil cooler for my zx12r
yeah..
kevin when you have cold oil you have GREAT oil pressure when these babys warm up the oil pressure will go down...you can even watch it on the gauges.
____________
Thanks
Doug Ray
SpencerCycle.com
SpencerCycle Center Inc.
Spencer Performance Group Inc.
Toll Free 1-800-510-1945 ext #10
International 1-800-510-1945 ext #11
Local/Tech 1-704-642-0987 ext #12
Fax 1-704-642-0987
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your car is slow
Needs a job
Fuck Nitrous...Got Boost?
Posts: 4089
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posted May 11, 2005 06:24 PM
I realize what its used for...but if you open the valve while the motor is at idle...how will any oil go into the acumulator (or stay in there if its under pressure)....I would think that any significant amount of oil in there would be under more than 10psi.
Obviously its not practical to reach down at the line while revving up to 4k and open the valve right before launch 
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Do not taunt happy fun ball!
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entropy
Moderator
Posts: 8671
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posted May 11, 2005 07:02 PM
quote:
the oil light comes on at 5-7 psi. just above that is what i have found when HOT
yup, exactly.
side note: I used to have a FBG vac pump on the crankcase, and turning on the pump at idle would make the oil light flicker. got rid of the vac pump...
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rac4it
Needs a job
Bergie
Posts: 3009
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posted May 12, 2005 03:56 AM
One reason why I run my idle a little higher.. Lee told me that 5 years ago back in 2000!
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Ra12r
Zone Head
Posts: 919
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posted May 12, 2005 05:46 AM
I believe we have the source of the failed bearings.
What HP demand is needed to overcome 10psi oil pressure?
As I write this I am looking at Rac4it's avatar and wondering how many HP is being generated at that moment and has the oil pressure increased at the same instant that the forces on the crank have to launch like that??
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psycho1122
Pro
Posts: 1608
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posted May 12, 2005 07:04 AM
I still get 35-40 psi at 4000 Hot. I keep my Oil Pump rotor in good condition and replace it when it gets any nicks. I was also VERY careful when I replaced my main crank bearings to insure that the rods were fed with good flow and pressure.
20 psi Hot at 4000??!! What kind of oil do you run?
Ra; What kind of HP do you think our 12's generate at "idle"? I don't see a "problem" with the idle oil pressures. In rac4it's pic, I'm sure his rpm's are up around 6000 or so. "Cavitation' would be at the top of my list!
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You say PSYCHO like it's a BAD thing!!
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bossman12r
Zone Head
Posts: 513
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posted May 12, 2005 07:14 AM
 Edited By: bossman12r on 12 May 2005 08:15
The Busa has a high pressure oil valve and gear can't the 12 use something like the Busa's?
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gen 4 zx10 is fast
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your car is slow
Needs a job
Fuck Nitrous...Got Boost?
Posts: 4089
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posted May 12, 2005 09:47 AM
Good point there...is the really low oil pressure with some 0wt oil? does continuing to run 15/50 even in a track only bike vs a street bike cause that significant of an increase in pressure at low rpm?
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Do not taunt happy fun ball!
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kcadby
Pro
Posts: 1733
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posted May 12, 2005 04:47 PM
Edited By: kcadby on 12 May 2005 17:48
quote:
kevin when you have cold oil you have GREAT oil pressure when these babys warm up the oil pressure will go down...you can even watch it on the gauges.
I know...that's what got my attention on the dyno...it had great pressure before I even started the motor...
I ALWAYS "prime the pumps" before my motors are started
Bikes are "ready to ride" before the clutch baskets go in...prime pump/MOTOR with oil...throw in clutch...start motor for 1st time...
WITH instant OIL PRESSURE!!!
GOOD pressure when cool but...after warm-up???
YIKES!!!
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Ra12r
Zone Head
Posts: 919
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posted May 13, 2005 05:00 AM
Psycho, I don't really think idle is an issue. But after that and launching at thesame time seems to be the issue. It seems that the regular street bikes are not having issues. The guys with the stroker kits are mainly all racing.
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All must bow to the "Ra Supremecy"...
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ninja12
Needs a job
Posts: 3310
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posted May 14, 2005 11:09 PM
Edited By: ninja12 on 15 May 2005 17:52
would heavy 15/50 oil fair better than 10/40?
Only considering oil pressure when hot?
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Lorcan
Expert Class
Posts: 327
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posted May 16, 2005 10:31 AM
Steve Venables (UK) 7.7 sec ZX12R had ZERO oil pressure shutting down from runs for two seconds, he captured it on his datalogger and is using an oil accumalator to prevent damage.
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kawachan
Pro
Posts: 1031
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posted May 16, 2005 08:47 PM
That is why I am getting an oil accumulator. I have both of my two center wrist pins and pistons gaulded a lil. I hope I can cure that with the accumulator...
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RED NINJAS RULE!!
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