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Post by smallyshane on May 24, 2008 9:01:51 GMT
Hi All,
Don't suppose you know what the timing should be set to? Torque settings for the head, and whats the squish meant to be set to???
Lost my instructions, and dont want to destruct it!!
Cheers
Shane
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Post by unreliablesc on May 24, 2008 14:03:41 GMT
Hi All, Don't suppose you know what the timing should be set to? Torque settings for the head, and whats the squish meant to be set to??? Lost my instructions, and dont want to destruct it!! Cheers Shane I have a squish of 1.05mm (with thickest and thinnest gasket in the kit) Timing, I'm running 24-16 with the vespatronic, and the instructions I got from terry says 16. 16-18Nm at the cylinder studs. |
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ozzy
Automatica
Posts: 4
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Post by ozzy on May 24, 2008 17:44:38 GMT
the intructions recomend squish of 1.2mm i set mine at about 1.14mm, timing 18 degrees...
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Post by adspeed on May 24, 2008 19:18:19 GMT
Timed mine at 26 giving 18, squish 1.0-1.2 will be fine......
Happy days when ya on the road pal? Getting it dynoed??
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Post by pj on May 24, 2008 19:55:51 GMT
ive seen pistons that have touched the head that have had a 1mm squish (but not smashed!). it depends on the amount of clearance in the bearings, clearance in the big and small end and the revs that engine run and even stretch in the conrod. the bigger the piston, the bigger the squish.
you can still get a good compression and a working squish with 1.2 - 1.5mm . if you dont have enough compression, get the squish remachined, i think its better than gambling on a good engine.
im biased, years ago before i had been tuning much, i use to play around with a suzuki x7 tuning. i was expermenting with smaller squish by changing base gaskets, and when i was testing the bike, i was passing a car on a motorway (too fast) and piston decided to hit the head, the engine locked up and i went side ways in front of the car i was passing (didnt automatically pull the clutch in- i paniced), the car swerved to miss me and it ended off the road.
i lived to tune another day, but now ive very accurate when setting squish.
paul
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Post by tony on May 25, 2008 2:31:14 GMT
squish is a variable. Clearance is dependent on bore,stroke,percentange, rpm, heat (comp/ign/blowdown) it goes on and on.
135 race malossi, 20mm stinger, 25%squish band profiled, 10,500 rpm,avgas,wiseco 58mm, t5 rod.. and only .8mm squish.. no problems.. if i were to retune to 11,500 rpm then expect to give a little more clearance. Its all relative to what you are running and what is best for that set up. There is no ideal squish for everyone running different stuff.
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ozzy
Automatica
Posts: 4
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Post by ozzy on May 25, 2008 8:01:41 GMT
shane, i still have my instructions if you want meto email them??
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Post by smallyshane on May 25, 2008 11:16:31 GMT
that would be spot on if you could ozzy!!
Will take on board the advice and see if i can get whats best for my setup though.
Cheers
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Post by unreliablesc on May 25, 2008 16:04:50 GMT
the instructions with my kit said 1.0 mm squish, it's weird that yours say 1.2 ozzy. Maybe i should retard the timing to 26/18 degrees, but I'm so bloody scared that it will pink.
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