Machining heads?

[jman093]

I have the manifolds torn off the GTP at the moment and am thinking I might go ahead and tear the top-end down all the way and replace my trashed valve stem seals and also remove the heads and clean them up a bit (all along with also considering plans to completely rebuild the LQ1 for more hp or just selling it and getting a 'vette).

If I was to do so would it be possible to have the heads machined/milled/whatever-it-is for higher compression? Or would there be problems with valve clearance, poor airflow, timing belt slack, or anything else I haven't thought of? If it's an alright idea, any idea how much can/should I have taken off?

Oh, and Ben, if you read this, I PM'd you about being able to port the heads awhile back. If I was to go ahead and take them off, would you be able to get around to doing this sometime soon?

[Z34Chevy]

I have the manifolds torn off the GTP at the moment and am thinking I might go ahead and tear the top-end down all the way and replace my trashed valve stem seals and also remove the heads and clean them up a bit (all along with also considering plans to completely rebuild the LQ1 for more hp or just selling it and getting a 'vette).

If I was to do so would it be possible to have the heads machined/milled/whatever-it-is for higher compression? Or would there be problems with valve clearance, poor airflow, timing belt slack, or anything else I haven't thought of? If it's an alright idea, any idea how much can/should I have taken off?

Oh, and Ben, if you read this, I PM'd you about being able to port the heads awhile back. If I was to go ahead and take them off, would you be able to get around to doing this sometime soon?

I'm just throwing this out there, but it is NEVER a GOOD idea to shave the heads down for higher compression, if you want higher compression get higher compression pistons, you can run into a lot of issues with shaving heads.

[SappySE107]

never a good idea to shave the heads down for higher compression? Well, no, I wouldn't say that exactly. Its not a good idea to do it solely for compression because it doesn't net you much at all. You are looking at about .010" max without making it an interference motor, so I suggest taking off as little as possible to get them flat. If you send the heads to get ported, I can have them milled as well, and if you want, a valve job as well. I can pretty much go through everything and tell you how it looks and what has to be done. I have no porting jobs at all right now so I could jump on it immediately.