Compression test readings for speed 6

[Fume Troll]

What would you expect to see ? E.g. x psi and y % variation between cylinders...

Just googled and found this from someone's "for sale" ad:

Bigger variation than I would have expected. Is this normal?

Cheers,

FT.

[yzf1070]

I do believe that 3 and 4 seem a bit low compared to the other cylinders which are all up there and within 10 psi.

On a recently newly rebuilt engine they were all between 290-295 psi.

[JR]

Fume Troll said:

What would you expect to see ? E.g. x psi and y % variation between cylinders...

Straight forward:

yzf1070 said:

On a recently newly rebuilt engine they were all between 290-295 psi.

Up to 20 psi difference.

Fume Troll said:

Bigger variation than I would have expected.

Yes, much bigger.

Fume Troll said:

Is this normal?

Can of worms question.

[Fume Troll]

OK, I suppose "normal" is a bit leading!

Thanks for your feedback.

Cheers,

FT.

[Mrs Cuchillo]

Please excuse possibly stupid question - were those figures for a 3.6 or a 4.0? Would it make any difference?