i want to do a compression test on my 3dr

how close should the figures be to each other

what is the approx figure i should get from each cylinder on a standard yb engine that has never been apart

do i take all the plugs out or leave in

 

wth all the technical threads on here and ones being currently active with knowledgable people,could you take time out to answer this please

 

They should all be within about 10psi if its a very healthy engine.

yes take all the plugs out

standard figures vary a lot, not least of which because gauges vary so much (i have 3 gunsons gauges that read a 20psi out for the same cylinder) but I guess its going to be around vaguely 150 ish, ie it shouldnt be over 200 or under 100 at least, lol

 

thank you very much,i am wanting to do this test before i up the power,hence my recent oil pressure gauge installation aswell