Compression Test

[s2tommy]

Just carried out a compression test after damaging the hot wheel on my turbo!
And would like some input from some people, as I am thinking the cylinder head is going to have to come off for a inspection!!

I have je custom pistons 82mm c/r 8-5-1
Stone cold engine, turbo is removed so can't start to warm up
Wot

1 - 10bar
2 - 10bar
3 - 8bar
4 - 8 1/2bar
5 - 9bar

Cheers tom

[Rusty]

Difficult to say cold but you'd expect about 10 Bar across the board. Best to be safe and take it to bits.

[nip]

Just carried out a compression test after damaging the hot wheel on my turbo!
And would like some input from some people, as I am thinking the cylinder head is going to have to come off for a inspection!!

I have je custom pistons 82mm c/r 8-5-1
Stone cold engine, turbo is removed so can't start to warm up
Wot

1 - 10bar
2 - 10bar
3 - 8bar
4 - 8 1/2bar
5 - 9bar

Cheers tom

You should test the compression on a hot engine, also take put the fuel pump relay and hold open the throttle fully

[s2tommy]

I can't do it with a warm engine as the turbo and exhaust manifold have been removed, but I did do it with the throttle wide open. I would expect maybe 1/2 bar differance between cylinders.

[AndyP]

Factory spec is 9-13bar with a CR of around 9:1. They quote a maximum difference between cylinders of 3bar Personally I'd be happier with 0.5bar as you say. I'd pull the head off for a look if I were you.

Or you could buy one of these and have a look

http://www.ebay.co.uk/itm/USB-Endosc...item19d29fac38

I've got one and they're really good

[UrS4boy]

AAN Compression Testing Procedures and Specs

Just carried out a compression test after damaging the hot wheel on my turbo! And would like some input from some people, as I am thinking the cylinder head is going to have to come off for a inspection!!...Cheers tom

Here is a link to AAN (or ABY and ADU) compression testing and specs

http://forums.quattroworld.com/s4s6/msgs/174154.phtml

[stocious]

Factory spec is 9-13bar with a CR of around 9:1. They quote a maximum difference between cylinders of 3bar Personally I'd be happier with 0.5bar as you say. I'd pull the head off for a look if I were you.

Or you could buy one of these and have a look

http://www.ebay.co.uk/itm/USB-Endosc...item19d29fac38

I've got one and they're really good

Just bought one can't wait to try it out !!
Always thought these were big money