zx14durham
Expert Class
4n21
Posts: 142
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posted January 18, 2009 05:55 PM
Anyone used JE Drop in Pistons
Has anyone put in JE 13.5 Compression stock bore pistons & used them with nitrous.
  
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billeason
Zone Head
Posts: 711
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posted January 18, 2009 07:04 PM
I have installed quite a few sets,and you can spray more then the stk pistons because they are forged,however they still have a shallow distance from ex valve pocket and top ring. If you want to hit her hard with nos,use the nos piston je offers,they cost more but well worth the money. Also check out some of the other piston manf, I prefer a certain one but wont name hear to be fair to all............Bill
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bill eason
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Ozonkiller
Expert Class
Posts: 350
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posted January 18, 2009 08:00 PM
I've got them in mine, normally aspirated with Carpenter cams, no NOS. I like them just fine.
They did come in a little low on compression ratio 13.3:1 vs. the advertised 13.5:1
I also sent them off to have the domes ceramic coated, just in case
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01smokes
Needs a job
Posts: 2243
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posted January 18, 2009 08:25 PM
with springs and drop in pistons about how much power can a 14 hold on spray??
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PayPal, vigilart22@yahoo.com
Email, artvgl@yahoo.com
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zx14durham
Expert Class
4n21
Posts: 142
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posted January 19, 2009 07:56 AM
 Edited By: zx14durham on 19 Jan 2009 15:57
Could it handle an 80 shot with these pistons, springs, nos controller, & good tune.
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dubious
Needs a life
Needs more time to ride!
Posts: 8442
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posted January 19, 2009 09:20 AM
Not sure on the pistons, I went with 2mm increase compression height for my turbo, I would think you might want more material above the top ring.
The fuel system will have to be upgraded.. increase your fuel pressure, maybe upgrade the pump too, for a dry shot that big.
...or run a wet shot
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natural selection.....
destiny will overcome intervention.
Some are not worthy of the effort.
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smokinZX14
Needs a life
Posts: 10197
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posted January 19, 2009 10:09 AM
The rule i use is this > don't exceed 25% of the motor output ... So if the zx14 puts out 200 hp at the crank you would go no more than a 50 shot ..50 is what would be called safe and anything passed that number would be threading on thin ice.. Now add rods pistons and valve springs you would be able to push that number to an 80 shot ( wet ) if correctly tuned ..
These motors are tuff and proven to take a beating but stock parts do have their limit..
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Smokin Performance Cycles..
Tampa Bay , FL .. Brocks Performance Dealer ..
Gen 2 ZX14R Best ET 8.43 , Best MPH 164.95
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dubious
Needs a life
Needs more time to ride!
Posts: 8442
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posted January 19, 2009 12:41 PM
I agree with Lee, but have been told many times the stock rods are good for 300HP...
I know of ZX14 engines, all stock but valvesprings that have survived 270 RWHP for a very long time and still running in Turbo application.
These engines indeed are tough, and the tolernces of mine upon inspection were awesome. A crank with 10,000 miles and 50 lbs of nitrous through it with .0001 deflection.
Cylinder walls that were all identical and square, (if a bit oversized)
My car engine builder (machinist) polished the crank , checked deflection, and upon internal balancing found it was already perfect!
He was totally amazed with the quality of the zx14 parts.
He has been building stroked and big bore race engines for cars for 30 years.
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natural selection.....
destiny will overcome intervention.
Some are not worthy of the effort.
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Mark524
Expert Class
Posts: 297
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posted January 19, 2009 03:56 PM
with stock bore 13.5:1 JE pistons, carrillo rods, head studs, and valve springs I've sprayed a 120 shot so far. probably try about 150 or so next year. I've had no problems so far.
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KZScott
Needs a life
high on speed
Posts: 7235
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posted January 20, 2009 01:39 AM
not a 14, but close  on my 1287 i sprayed a 90 shot on 91 octane pump with no problems untill i hit the rev limiter and spit a shim(got a few 161mph time slips to proove it). I thought it was 12.5:1 cr but it was actually 13.5:1 like the drop ins you are asking about. tuned rich, 11.5:1 afr and 7.5 degrees of timing pulled(very conservative setup)
prep your pistons for nitrous to avoid a lot of problems. sharp edges and thin areas cause hot spots= detonation
before
after
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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
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SteddyTeddy
Pro
Posts: 1664
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posted January 20, 2009 05:08 AM
Is that a thermal coating or just a polished used piston?
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KZScott
Needs a life
high on speed
Posts: 7235
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posted January 20, 2009 05:17 AM
the pics are a new piston i preped for use in dads bike(with 3 used ones, thread going in dragbike zone) i used the same type and did the same prep to mine last yr, but dads pics were just easier to find. no coating, just used a file, and 400 grit sand paper by hand
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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
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