Arnie3600
Novice Class
Posts: 32
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posted November 01, 2009 07:09 PM
I think that i want to start building engines in Doug's shop. It looks clean as hell in there and I bet there is some really cool shit too.
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dougmeyer
Needs a job
moderated
Posts: 2713
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posted November 01, 2009 07:48 PM
Yes and Yes. Stop by anytime. 
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It's not that I think you're dumb, it's just that so much of what you know isn't true....
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chavcat
Zone Head
Posts: 524
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posted November 02, 2009 04:57 AM
Doug - thanks for the excellent explanation and photos. By the way using the 4 bolts to hold the block in place- what tq are you applying to these bolts? Also looks like you are using wrist pins as spacers on the block bolts?
Thanks
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dougmeyer
Needs a job
moderated
Posts: 2713
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posted November 02, 2009 06:26 AM
Old pins, yes. But black pipe would work. whatever you can come up with that is solid. Torque- Don't know, 20-pounds maybe. The block doesn't squeeze shorter during actual assy, neither will a stroke spacer, neither will the non beaded portion of a shim gasket. The whole stack might shrink .002 at most, which, since we are only measuring squish here, is not particularly relevant.
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It's not that I think you're dumb, it's just that so much of what you know isn't true....
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Shane661
Needs a life
Posts: 11494
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posted November 02, 2009 06:28 AM
 Edited By: Shane661 on 2 Nov 2009 14:28
I'm a little curious about the "solder" measuring method:
Doesn't the rod bearing clearance get reduced when you compress the solder? In that respect, how do you get an accurate squish measurement that allows for the bearing clearance? Or is that simply within the acceptable margin of error?
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entropy
Moderator
Posts: 8671
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posted November 02, 2009 08:44 AM
squish is .029min, .034"max for my motor,
bearing clearance = .001" (on 1 side). = TSTWA (too small to worry about)
I like the solder method bc it allows me to see which/if rods are long.
My Hillybilly Crank (missing teeth) has #2 rod journal offset .002" more than #1.
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almost_les
Zone Head
Posts: 590
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posted November 02, 2009 07:11 PM
Edited By: almost_les on 3 Nov 2009 03:19
if you wanna mess around with different CR's you'd get from head gasket/base gasket combos i have a ghetto excel calculator i can email you. just put @yahoo.com after my screenname.
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dougmeyer
Needs a job
moderated
Posts: 2713
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posted November 02, 2009 07:37 PM
Much easier to see cyl to cyl variations with the dial indicator on the pistons....... When you are (really) building an engineand not just rebuilding one, using different parts, different sources, trying to come up with specific combination, you really need to be measuring each these things separately to understand what you need to change. The whole "put it together-turn it over-take it apart" thing gets really old. There are lots of ways to get where you want. It's easier this way.
D.
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It's not that I think you're dumb, it's just that so much of what you know isn't true....
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KZScott
Needs a life
high on speed
Posts: 7235
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posted November 22, 2011 08:39 PM
bump for great info
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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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justoyz2
Zone Head
Justoyz Racing
Posts: 858
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posted February 17, 2014 11:06 PM
So, which produces greater results.. milling or thinner head gasket?
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2012 zx14R-blue,2012 zx14R-black, 2014 zx14Trbo, 2011 zx10R, 2007 zx10 Turbo.....
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krexken
Zone Head
Posts: 732
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posted February 21, 2014 03:12 AM
.010 removed by thinner head gasket gains you more compression than milling .010.
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KZScott
Needs a life
high on speed
Posts: 7235
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posted February 22, 2014 08:40 AM
quote:
So, which produces greater results.. milling or thinner head gasket?
it really depends on what youre doing it to. if the squish is already as tight as you want it, a thinner gasket is not an option.
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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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dougmeyer
Needs a job
moderated
Posts: 2713
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posted March 13, 2014 07:43 PM
Since you are reducing the AREA of the combustion chamber slightly, as well as moving it "down" milling would VERY slightly give a greater reduction in CC volume. The amount depends on the shape of the chamber in question.
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It's not that I think you're dumb, it's just that so much of what you know isn't true....
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2000redrocket
Pro
Posts: 1662
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posted June 14, 2014 11:03 AM
i do not know about the small bike pistons and shorter stroke unless rod ratio being the same makes no difference. with my rod ratio around 1.8 on my car 8 to 9cc reduction or gain is a full cr point. my pistons are 11.5 @ 73cc. hehehe i'm at 49.5cc according to mr jim. hehehe my 440 rocks after jims shop fixed the heads.
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