Alfa Romeo Forums banner

1 - 3 of 3 Posts

·
Registered
Joined
·
183 Posts
Discussion Starter #1
What would be the standard, normal expected operating parameter for cylinder compression - standard Alfa twin cam 4 cylinder 2000 cc.

Thanks,

8oclock
 

·
Registered
Joined
·
173 Posts
Expected compression test readings

8oclock-

I expect around 200 psi on stock, spica injected 2 liter motors. Since you are living in the US and posted this in the Alfetta Forum, you should have this motor.

Ideally, you should do your test with the engine at operating temperature, with a strong battery to get good cranking rpm, all 4 plugs removed and the throttles wide open. The readings should all be within 5% from highest to lowest. Uneven valve clearances can have some effect. Also, every gauge reads a little different.

Let us know how your readings came out.

~Chris
 

·
Registered
Joined
·
3,553 Posts
I agree with Chris up to a point. My experience with the stock type of pistons I get around 185 psi. However, with 10:1 pistons I get about 205 psi.
 
1 - 3 of 3 Posts
Top