CR Ratio ?

[Steve Leonard]

Tony,

Some suggestions:
 A)For a street ridden engine, change compression to
9:1.
B)If you don't have turbo cams, factory 1982-83
GPZ1100 cams are perfect for these turbo engines. 
C)either way, degree the cam shafts to 104 intake and
107 exhaust centerlines.
D)The best money you can spend is getting a DYNA 4000
high output ignition, It is designed for these ole'
Kaw motors.
E)These 2-valve Kawasaki's really respond well to
having the head dual plugged. If you do, you can set
your ignition timing to 32 degree's instead of 38
degrees.
F)make sure you have Heavy duty oil pump gears
installed, these air cooled engines don't have much
oil pressure.
G)If your running 10lbs boost, you are making some
great HP, for safety you should have a APE engine
case reinforcement kit, it stops the crankshaft
runout problems these Kawasaki's have.
H)If you have Z-1 cases you should get that 2nd gear
overshift bushing.

Let me know if you need contacts for these parts. I
have a 1327cc GS1100 that I'm turboing also,I keep
you updated.
                                  Happy Holidays
                                  Steve Leonard   




---Tony Cooper <tony.cooper at virgin.net> wrote:
>
> Hi All,
> 
> Ok here's a question - hope someone has an idea/....
> 
> My pet project, as you may already know, is a turbo
charged 1200cc
> Kawasaki. The compression ratio is currently 7.5:1.
Using a T2 turbo,
> the boost comes up at about 4000rpm, and climbs
quite spectacularily to
> 10lb. It is very interesting to ride (read as
frightening). However,
> because the compression ratio is so low, off boost,
the bike can be a
> little sluggish. On boost, the bike is fine. Now, I
am just about to do
> a strip down and repaint. While I am there, It
would not be much hassle
> to change the CR ratio, bringing a bit more life
back into the engine
> when it is not on boost.
> 
> It is a 2 valve per cylinder engine, revs to 9500,
runs on un-leaded
> (normal fuel for our american friends).
> 
> The question is, what would the optimum CR ratio be ?
> 
> I think that 8.5:1 would be ok, but has any one
else got any better
> solutions than finger in the air type of figures?
> 
> Cheers in advance
> Tony
> P.S. May everyone who reads this have a very merry
christmas, and a
> happy new year.
> -- 
> Sent By Tony Cooper.
> email: tony.cooper at virgin.net
> Allow at least 10 working minutes for reply. ;)
> 
> 

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