Valve-Lash Affect On Cylinder Compression

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Re: Valve-Lash Affect On Cylinder Compression

13 Dec 2021 15:40
#859019
NOT TOO BAD 
[img
Z1b1000 1975 Z1b
kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
kzrider.com/forum/2-engine/597654-poser?start=240#704229
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Re: Valve-Lash Affect On Cylinder Compression

13 Dec 2021 16:28
#859026
Do you have aftermarket high duration cams installed?  Those numbers are okay, but a little low if the stock cams are being used.
Ed
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1981 KZ750E2
www.kzrider.com/forum/11-projects/604901...z750e-project-thread
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Re: Valve-Lash Affect On Cylinder Compression

13 Dec 2021 16:36
#859028
How does it ride?
81-KZ440-D2.
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Re: Valve-Lash Affect On Cylinder Compression

14 Dec 2021 08:27 - 14 Dec 2021 10:32
#859064
wrote:
Do you have aftermarket high duration cams installed?  Those numbers are okay, but a little low if the stock cams are being used.


 

Engine has 1984 ZX1100-A2 GPZ 12044-1057 cams with 300 degree duration and .375" lift. 

The stock (standard) 12044-1027 cams have 270 degree duration and .320" ish lift.

[img



What would the compression likely be with the stock cams installed?


.
1982 KZ1100-A2
Last edit: 14 Dec 2021 10:32 by daveo.

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Re: Valve-Lash Affect On Cylinder Compression

14 Dec 2021 16:16
#859083
wrote:
wrote:
Do you have aftermarket high duration cams installed?  Those numbers are okay, but a little low if the stock cams are being used.



 

Engine has 1984 ZX1100-A2 GPZ 12044-1057 cams with 300 degree duration and .375" lift. 

The stock (standard) 12044-1027 cams have 270 degree duration and .320" ish lift.

[img



What would the compression likely be with the stock cams installed?


.

Higher, just don't know how much.  One of the hot rod engine guys will have to answer.  My guess is about 10-15 psi more?
Ed
Carb O-ring Kits : www.kzrider.com/forum/3-carburetor/61807...-o-ring-kits?start=0

www.kzrider.com/forum/faq-wiki/618026-new-owner-things-to-know

1981 KZ750E2
www.kzrider.com/forum/11-projects/604901...z750e-project-thread
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Re: Valve-Lash Affect On Cylinder Compression

14 Dec 2021 23:41 - 15 Dec 2021 19:19
#859091
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How does it ride?


 
Totally different...beautiful! 

Noticeable power increase all over, but really flies over 5K to the red zone.  The engine holds the red line nicely.

I have the rev limit set on 9.5, but may just bump that to 10.

[img


.
1982 KZ1100-A2
Last edit: 15 Dec 2021 19:19 by daveo.

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Re: Valve-Lash Affect On Cylinder Compression

15 Dec 2021 05:59
#859093
If it were me, I wouldn't worry about the static compression numbers unless you are going to race it competitively. Just enjoy it. The numbers by themselves don't mean much. There are too many other factors that play into the engine's condition. 

If it were riding badly, then I would worry about the compression numbers and that would just be a starting point for other tests.

You have to ask yourself...do you enjoy riding the bike or working on it.
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Re: Valve-Lash Affect On Cylinder Compression

15 Dec 2021 19:06 - 15 Dec 2021 19:10
#859143
wrote:
If it were me, I wouldn't worry about the static compression numbers unless you are going to race it competitively. Just enjoy it. The numbers by themselves don't mean much. There are too many other factors that play into the engine's condition. 

If it were riding badly, then I would worry about the compression numbers and that would just be a starting point for other tests.

You have to ask yourself...do you enjoy riding the bike or working on it.

 
At this point I'm done...nothing more is needed!  All set for an early Spring romp. 
[img


I'm done making mechanical enhancements on this bike.  Each project started was concluded, and all surpassed expectation. 
However, the original paint does have some chips and scratches...

I imagine her wearing a coat of Candy Apple Red.

[img


.
1982 KZ1100-A2
Last edit: 15 Dec 2021 19:10 by daveo.
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Re: Valve-Lash Affect On Cylinder Compression

15 Dec 2021 19:46 - 15 Dec 2021 19:47
#859146
Perfect!

House of Kolor has a nice candy apple red.

www.houseofkolor.com/kolors/detail/index.html?id=S2-KBC11

 
81-KZ440-D2.
Louis Dudzik's GM HEI ignitor conversion installed 2015 s3.amazonaws.com/gpzweb/Ignition/GPZgmHEImod.html
Motogadget m-unit blue installed 2017.
LIC, NY
Last edit: 15 Dec 2021 19:47 by F64.
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Re: Valve-Lash Affect On Cylinder Compression

15 Dec 2021 20:05
#859148
Mazda soul red crystal 46V.
1976 KZ 900 A4 kzrider.com/forum/11-projects/613548-1976-kz-900-a4
1976 KZ 900 B1 LTD
1978 KZ 1000 B2 LTD
1980 KZ 750 E1
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Re: Valve-Lash Affect On Cylinder Compression

15 Dec 2021 22:53 - 15 Dec 2021 22:54
#859157
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Mazda soul red crystal 46V.
Mazda soul red latest project.
[img
[img
[img
[img
[img

Z1000J2 somewhat modified!
[img

Last edit: 15 Dec 2021 22:54 by Warren3200gt.
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