KZScott
Needs a life
high on speed
Posts: 7235
|
posted March 26, 2012 05:49 PM
cracked turbo piston
I wasnt too impressed when I pulled this out tonight
and compare to the Muzzy spec MTC
____________
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
  
|
tcchin
Zone Head
Posts: 867
|
posted March 26, 2012 09:35 PM
Looks like those valve pockets were an afterthought... What brand were those pistons?
|
KZScott
Needs a life
high on speed
Posts: 7235
|
posted March 27, 2012 03:59 AM
83mm (stock bore) JE shelf turbo piston. these had limited dyno pulls, up to 27 psi, which cracked the stock block, and then a handful of passes at the drag strip at 10-12 psi one wknd. some limited running on the stand to compare the old turbo system to the new one. I didnt know there was a problem until i saw them last night
____________
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
|
rgeorge
Expert Class
Posts: 220
|
posted March 27, 2012 08:06 AM
quote:
Looks like those valve pockets were an afterthought... What brand were those pistons?
I have a very similar failure with my custom made 84mm JE nitrous pistons, I just took the top end apart last week and found warping around the intake valve relieve on piston1. Pistons 3 and 4 have complete failure. I'll go take some pics.
|
wrongway
Pro
Posts: 1078
|
posted March 27, 2012 02:28 PM
I had Wossner make a custom set of pistons for me after the JE stroker pistons developed cracks .JE could not tell me what caused them to crack , so I went with a different brand/design.
We will see what they look like after a season or two of abuse :-)
|
smokeysevin
Novice Class
ZX12r-STX15f hybrid motor
Posts: 82
|
posted March 29, 2012 02:54 PM
What power were you putting to the wheels?
Sean
____________
1498 cc
69.2mm stroke
83mm bore
|
KZScott
Needs a life
high on speed
Posts: 7235
|
posted March 29, 2012 05:07 PM
not exactly sure. it was the first bike to ever be put on the dyno at this shop. its a Mustang dyno which "reads low" like a factory pro and super flow. about 15% lower than a dynojet like Brock or Muzzy use.
we dont think the calibration was quite right. rough guess it was reading double as we had it spinning 1 drum, but really we dont know
heres gate pressure (5.3) and 25.3psi
and the run that killed the block
____________
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
|
smokeysevin
Novice Class
ZX12r-STX15f hybrid motor
Posts: 82
|
posted March 29, 2012 07:28 PM
That makes me feel better. I am using those same pistons in my 1498 as high compression and got scared. My motor will be much less high strung than 25 psi of boost though. Are you using stock conn rods?
Sean
____________
1498 cc
69.2mm stroke
83mm bore
|
KZScott
Needs a life
high on speed
Posts: 7235
|
posted March 30, 2012 05:50 AM
yes stock rods
____________
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
|
|
|
HOME
NEW TOPIC