compression on 4efte

[hazell ep91 sr]

what should compression results be on a 4efte? been offered an engine with compression of 140,138,140,139.

that good or?

[Johnboy GT]

Thought it was spose to be up at 160... May be wrong though dudr. would wait and see someone who knows for def.

John

[AdamB]

Is it forged?

Seems ok to me, they are all equal or there abouts. Would like to see a bit more myself.

[hazell ep91 sr]

yeah i thought it was a bit low, equal but low. no its not forged, standard engine, after an engine to use for my 4efte conversion but finding a good one is proving difficult!

need one with good compression that comes ideally with gearbox and all ancillaries

[starletburkie]

150 psi would be an evenly worn engine, there 175psi stock or there abouts

[hazell ep91 sr]

ok thanks people, wont be getting that engine

[A L 3 X]

One question, for a turbo engine175psi is fairly high, how come?

[AdamB]

Wouldn't say thats very high at all. Most modern engines run a lot higher compression ratio, and also a higher bmep.

It's the low compression of these engines that allow such tuning without much fuel modifications.

[jackellis19]

i done a compression test on mine and it was 100,100,60,100 i kn ow cycliner 2 is low and i think its a cracked ringland but i was wondering why the other 3 cylinders are so low too? could the rings be bad in all 4? would replacing the damaged piston and 4 new rings solve this?

[AdamB]

i done a compression test on mine and it was 100,100,60,100 i kn ow cycliner 2 is low and i think its a cracked ringland but i was wondering why the other 3 cylinders are so low too? could the rings be bad in all 4? would replacing the damaged piston and 4 new rings solve this?

Have you tried a wet test? Drop a teaspoon of oil down each bore, if the reading rises then you have a ring/cylinder problem. If it doesn't it will most likely be a headgasket issue.