deadken
Member
- Joined
- Mar 31, 2009
- Location
- Long Island, NY
I have a 531 head at a local machine shop that has a good reputation. While discussion what can be done, we talked about installing 39mm exhaust valves instead of the stock 38mm valves. The machinist likes this idea as it could be done while retaining the stock valve seats and should help exhaust flow. The price is reasonable for the work ($10 a valve), but the question is where to find a 39mm Valve, sodium filled if possible? I have found some listings by searching around the internet, but none of them seem to list the valve size. They all give application (year, make, and model) rather than dimensions. So, I wrote an email to TRW / ZF and I'm awaiting a response.
Figuring that I don't need to re-invent the wheel, I figured that I'd ask here what valves others have used. I realize that it's probably a very small percentage of the users that have done this, but I also realize that of the Volvo owners that have done this, a rather large percentage are likely members here! Thanks in advance for any helpful or humorous suggestions!
Figuring that I don't need to re-invent the wheel, I figured that I'd ask here what valves others have used. I realize that it's probably a very small percentage of the users that have done this, but I also realize that of the Volvo owners that have done this, a rather large percentage are likely members here! Thanks in advance for any helpful or humorous suggestions!