zrexpilot
Expert Class
Posts: 470
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posted June 11, 2009 06:13 AM
Motors hurt (testing last night) times inside. (Questions)
Got the bike to the track last night, 40% NOS to full in 3.5 sec.
first past hit the limiter on the 1-2 shift, damn thing comes quick. 8.79@ 167mph
I then bumped the NOS to 45%
second pass got a better 60' only to start spinning 2nd and third, short shifting like crazy
8.79@ 164mph
third pass stood it straight up, standing on rear drag pegs trying to push it down short shifting again 8.80@ 161 mph.
4th pass not so good, didnt feel good and she let loose, sounded like a diesel on the jay brakes at about the 1000' only went 9-Oh something@150
Motors hurt , would barely crank over ,I didnt hear any claticky clack noises just sounded like it lost all compression. I have a little oil towards the back of the motor
I get home and notice the overflow bottle is completely full and it cranked and fired up but I turned it off immediately.
Any ideas ?
If the head lifted or the head gasket blew can It spray oil out ?
What would you check befor pulling the motor ? would you start it again and listen to it ?
It has heavy studs. 1287 kit
  
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krexken
Zone Head
Posts: 732
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posted June 11, 2009 07:37 AM
 Edited By: krexken on 11 Jun 2009 15:37
Big mph! Sounds like head gasket or maybe even cracked cylinder to me. The oil on the engine sounds weird though. I do a compression check for sure. If I were to crank it, check for steady stream of bubbles into overflow. Sucks to hear about your new motor, Mario. Hopefully it's just a head gasket. What did you torque the head to? Just curious. If they're not tighter than stock, your not taking advantage of the studs. You're actually worse off.
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ZRXDean
Needs a job
Posts: 2225
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posted June 11, 2009 08:10 AM
Maybe pull the plugs and turn it over with a wrench, then a leakdown test. Sucks.
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zrexpilot
Expert Class
Posts: 470
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posted June 11, 2009 08:19 AM
well it seems its a piston. I fired it up and its running very rough, not all cylinders , and shakes a bit, no noise though. I think its a piston by how it acted , basically losing power and almost ceizing and then cooling down and cranking up and firing.
We had it pretty rich, like 11 1/2 - 12 to 1
Next question can you melt a piston with too rich of condition because my bottle was on the low side on that pass and could have gone pretty rich.
I dont remember what he torqued the head to, I didnt do it.
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NOX
Needs a job
PMRA / TMRC Super Street 4022
Posts: 3745
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posted June 11, 2009 08:51 AM
Man , that sucks...........
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entropy
Moderator
Posts: 8671
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posted June 11, 2009 09:29 AM
when "i"  holed a piston at the last texas mile it acted you are saying
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TRNorBRN6001
Needs a job
Posts: 2021
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posted June 11, 2009 10:50 AM
Ouch, that hurts. Hope it's not too bad.
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Stuart Racing
Zone Head
N.H.R.A . Dragracing.
Posts: 999
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posted June 11, 2009 11:54 AM
I don`t know about the ZX but on motors I`ve run N2O doesn`t like short shifts....I don`t know how short your shifts were.....Just a thought for next time maybe....
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Stuart Racing
Zone Head
N.H.R.A . Dragracing.
Posts: 999
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posted June 11, 2009 11:55 AM
quote:
I don`t know about the ZX but on motors I`ve run N2O doesn`t like short shifts....I don`t know how short your shifts were.....Just a thought for next time maybe....Sorry to here about it ....
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Johnnycheese
Pro
Posts: 1008
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posted June 11, 2009 03:59 PM
quote:
well it seems its a piston. I fired it up and its running very rough, not all cylinders , and shakes a bit, no noise though. I think its a piston by how it acted , basically losing power and almost ceizing and then cooling down and cranking up and firing.
We had it pretty rich, like 11 1/2 - 12 to 1
Next question can you melt a piston with too rich of condition because my bottle was on the low side on that pass and could have gone pretty rich.
I dont remember what he torqued the head to, I didnt do it.
did you load the motor to check a/f if not you were not at 11.5:1 at wot
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dougmeyer
Needs a job
moderated
Posts: 2713
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posted June 11, 2009 07:37 PM
Don't bother - take it apart. Isn't Nitrous fun?
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Phantom13
Zone Head
Posts: 736
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posted June 11, 2009 07:53 PM
Again, huh?
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zrexpilot
Expert Class
Posts: 470
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posted June 15, 2009 04:56 PM
well it doesnt look like it was the tune.
I started pulling it apart and checked the plugs, they look good.
Started looking around for where the oil came from and then I see some dents(cracks) on the case behind the header. Something let loose on the bottom end.
Are all cases the same ? and does anybody have a set.
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NOX
Needs a job
PMRA / TMRC Super Street 4022
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posted June 15, 2009 09:26 PM
early models differ from late models.......
I have a set of special ventilated ones you can have......
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NINJA12
Needs a job
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posted June 16, 2009 09:36 AM
Stay away from 2000 and 2001 cases!
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chavcat
Zone Head
Posts: 524
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posted June 16, 2009 02:50 PM
Rationale for avoiding 00/01 cases?
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NOX
Needs a job
PMRA / TMRC Super Street 4022
Posts: 3745
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posted June 16, 2009 09:49 PM
The rationale is something about the oiling........
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21 Runner-ups
2010 TMRC Super Street Points Champion
2010 PMRA Super Street #3 Points
2009 PMRA Super Street Points Runner-Up
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NINJA12
Needs a job
Posts: 3310
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posted June 17, 2009 05:02 AM
Atleast 10 engines, all dead with number 3 rod.
Stock to stroked.
Are there any ZX12's with 2000 or 2001 cases still being raced,
WITHOUT crank problems?
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NOX
Needs a job
PMRA / TMRC Super Street 4022
Posts: 3745
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posted June 17, 2009 05:55 AM
I have a friend here with one.......
But it has like no miles on it....., it gets raced a few times a year.......
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42 Wins
21 Runner-ups
2010 TMRC Super Street Points Champion
2010 PMRA Super Street #3 Points
2009 PMRA Super Street Points Runner-Up
6 Time Centerville Dragway Points Champion
Sponsored by:
Scorpion Helmets
Galfer Braking
AMSOIL
Steve's Speed Shop
Kawasaki Sports Center
Mickey Thompson Tires
Catalyst Racing Composites
Conway Cycle
Syed Leathers
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TRNorBRN6001
Needs a job
Posts: 2021
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posted June 17, 2009 07:02 AM
Mine, but that old juice likes to hammer my pistons. It doesn't help pinching a fuel line as though. lol
I do believe Entropy likes the old Y2K junk as well.
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mathews
Expert Class
Posts: 425
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posted June 17, 2009 10:00 AM
http://psychobike.com/forums/garage-sale/21956-selling-all-my-zx-12-stuff.html
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KZScott
Needs a life
high on speed
Posts: 7235
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posted June 17, 2009 12:48 PM
i have yet to have bearing issues with my 01 (knock on wood)
dads 00 has, but thats from the oil pan design.....
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chavcat
Zone Head
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posted June 17, 2009 05:38 PM
Doug /Karl - any thoughts on the issue of cases?
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dougmeyer
Needs a job
moderated
Posts: 2713
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posted June 17, 2009 06:13 PM
I'm not aware of any substantive differences or changes in the cases. Don't assume that if the part number changes, that there is a difference. That can result from things that are totally irrelevant.
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Johnnycheese
Pro
Posts: 1008
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posted June 18, 2009 03:05 AM
sparyed a ton of dope on ralfs 00 cases and they are still mint
if fact they are for sale
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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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