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 Squish Band and Head Gaskets

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waterbottle
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PostSubject: Squish Band and Head Gaskets    Sat Jan 28, 2017 1:10 pm

Looking to avoid house chores, I hid in the shed and whipped the left head off the trackie. Made some spacers from small box tubing and tightened the barrel back down. measuring the piston height to top of the barrel at TDC , I have .016" Thumbs Up
Q: am I correct in assuming I can use the thinnest head gasket, .65mm or .0256" . (.016" + .025" = 041" squish )
It came from the factory with the thickest ones fitted .0413". Suspect
I used the same thickness ones at the rollerization to keep things simple , but the difference here is nearly .016".
                                                                      Every little bit helps, Right ? Wink

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Pete Roper
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PostSubject: Re: Squish Band and Head Gaskets    Sat Jan 28, 2017 1:33 pm

Try it. There will be a bit of crank whip but you'll soon find out if it's too small as the sump will fill up with bits of big end shell! Very Happy

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waterbottle
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PostSubject: Re: Squish Band and Head Gaskets    Sat Jan 28, 2017 1:43 pm

Laughing Razz There's A screen in there to collect those bits cheers
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nev
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PostSubject: Re: Squish Band and Head Gaskets    Mon Jan 30, 2017 4:26 pm

Waterbottle can you just explain why you are doing this ?

and Pete , by flex do you mean "bend"

nev
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waterbottle
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PostSubject: Re: Squish Band and Head Gaskets    Mon Jan 30, 2017 6:00 pm

Nev, Why have a thicker head gasket than necessary. I used the chart in the front of the workshop manual to calculate the required thickness. It's within the tolerances allowed so shouldn't hurt anything and may release some more of the Shetland Unicorns from the stable Laughing
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Pete Roper
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PostSubject: Re: Squish Band and Head Gaskets    Mon Jan 30, 2017 6:37 pm

nev wrote:
Waterbottle can you just explain why you are doing this ?

and Pete , by  flex do you mean "bend"

nev

Yup, cranks bend. not by a lot but they bend. If you screw up the clearances the top of the piston deck will contact the head at high RPM. when this happens its rarely enough to destroy the piston, (Although it can collapse the top ring land so the ring is seized and can't do its job.) but it biffs the rod through the oil wedge on the big end journal and the bearings break up!

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waterbottle
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PostSubject: Re: Squish Band and Head Gaskets    Mon Jan 30, 2017 11:40 pm

Set within the factory specs, we should be good to go though , Yes ?
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Pete Roper
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PostSubject: Re: Squish Band and Head Gaskets    Tue Jan 31, 2017 12:07 am

Yup!
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waterbottle
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PostSubject: Re: Squish Band and Head Gaskets    Tue Jan 31, 2017 1:19 am

I'm asking no more of the beastie than the factory allows. But if we could find some better bearings and a bit more oil pressure ........
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PostSubject: Re: Squish Band and Head Gaskets    Tue Jan 31, 2017 12:50 pm

Red Line is set in the factory to be more than adequate, for safety/longevity reasons. The question beckons as to what you could really take it up to, especially for suck a purpose - track work. When are you going to start racing it Ron?
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waterbottle
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PostSubject: Re: Squish Band and Head Gaskets    Tue Jan 31, 2017 1:00 pm

Just track days Tony, I'm not really that good Embarassed
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Oz1200Guzzi
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PostSubject: Re: Squish Band and Head Gaskets    Tue Jan 31, 2017 1:11 pm

none of us are Ron! It's just what our ego tells us...
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waterbottle
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PostSubject: Re: Squish Band and Head Gaskets    Tue Jan 31, 2017 1:29 pm

I have moved up from the really slow group to the slow group There are some kamikaze's in this mob Shocked
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ghezzi
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PostSubject: Re: Squish Band and Head Gaskets    Tue Jan 31, 2017 3:14 pm

Keep tellin ya Ron, sell the beast and buy an RVF400.
Sure I got blown away down the straights, but it was more fun to just ride around the outside of 'em in the corners. Ya canna do thart on a Gootsi!
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