1999-2009 [Subscribe to Daily Digest] |
The only problem with machining the 4 cylinder head is that it raises the compression ratio. There is a minumum height for the cylinder head. I don't have WIS at hand. Maybe someone could post the number. I had a 2.1 liter C900 once with 250 psi in all 4 cylinders and the complaint was no power in the mountains. The head had been machined too much. High compression can cause high NOX emmissions too for those who live with the IM240 emmissions testing.
No Site Registration is Required to Post - Site Membership is optional (Member Features List), but helps to keep the site online
for all Saabers. If the site helps you, please consider helping the site by becoming a member.