hi just rebuilt my top end with weiseco piston and new rechambered and milled head do i have to break piston in before i do a comresion test as i done one one strait after biuld and it only red 125psi
new top end compresion test
- Thread starter blaster man1
- Start date
It should get a bit higher once you break it in and the rings seat. Make sure you do the heat cycles and re-torque head and cylinder after.
If you compression gauge has long tube with the Schrader core at the gauge an not at plug insert its going no affect your reading, as the tube adds volume to the combustion chamber
dont know ware it was done got it from a freind he got it like that looks like it has about 5mm taken off and alloy removed from dome looks like a good job
pic would help?
vitos high compression gasket is 14 thousands of an inch smaller and they say it adds 10psi.
hard to say unless you had cylinder freshened up first,with a new piston rings...leak tested
ken oconnors head is like 30psi more so it you were to start at 120psi...it would be like 150
mine.......
vitos high compression gasket is 14 thousands of an inch smaller and they say it adds 10psi.
hard to say unless you had cylinder freshened up first,with a new piston rings...leak tested
ken oconnors head is like 30psi more so it you were to start at 120psi...it would be like 150
mine.......
did leak test found leak at intake its a pain in the ass cant seem to stop the leak will fix it before i run piston in thow
Seeing that he is in Scotland, who knows who did it. Other than checking with another gage, won't matter whole lot. Ya got what ya got.
Did you have cyl bored for new piston? Set ring end gap?
Did you have cyl bored for new piston? Set ring end gap?
yes all checked before install could it just be that the rings nead to seat first i havent evan started it yet
A KOR re-designed head is set at 22cc for engines running pump gas and will yield 140 - 155 psi with a static compression test. A home porting job will change that number.
i ported using your vids and info raised exhaust 1mm polished exh raised intake 1mm droped 2mm would this lower the comp
Fix the leak befor starting it.
The intake area is very prone to leaks, especially if it has been overtightened and warped the cage and boot.
High temp copper RTV on both the block and boot left to dry over night should seal it up.
No more than 5.8 ft lbs on the bolts.
The intake area is very prone to leaks, especially if it has been overtightened and warped the cage and boot.
High temp copper RTV on both the block and boot left to dry over night should seal it up.
No more than 5.8 ft lbs on the bolts.
