naviathan Posted June 5, 2008 Share Posted June 5, 2008 As the title says, is safe to do some mild port work on my N42 head with the seats and guides still in? Any advice to get the most for my time spent without going overboard? Quote Link to comment Share on other sites More sharing options...
1 fast z Posted June 5, 2008 Share Posted June 5, 2008 All porting needs to be done after seats are installed. Quote Link to comment Share on other sites More sharing options...
naviathan Posted June 5, 2008 Author Share Posted June 5, 2008 All porting needs to be done after seats are installed. Sweet, so just be careful not to nick the seats and I should be fine. What about the guides? I see most of your port work has the guides removed (or cut completely down flush?), so should I have the guides pressed out, or just leave them in and work around them? What would you recommend? You are one of the resident experts here and I'll take you word as gospel. Quote Link to comment Share on other sites More sharing options...
1 fast z Posted June 5, 2008 Share Posted June 5, 2008 Ex, guides I take flush, Intake guides I leave stock length, as they dont hurt any flow, and the larger valve benifits from the extra support. I just drive the intake guides out, then drive them back in when finished. Quote Link to comment Share on other sites More sharing options...
naviathan Posted June 5, 2008 Author Share Posted June 5, 2008 Ex, guides I take flush, Intake guides I leave stock length, as they dont hurt any flow, and the larger valve benifits from the extra support. I just drive the intake guides out, then drive them back in when finished. What do you use to drive them out with and is it something I can do at home (decent garage, not a machine shop)? Quote Link to comment Share on other sites More sharing options...
1 fast z Posted June 5, 2008 Share Posted June 5, 2008 I build my own guide tools, on a lathe. You cannot use a flat punch or something, if that is what you are asking. It has to have a pilot, that barely slips in the guide (basicly the size of the valve.) Then you have to have an OD that is about .005" smaller than the od of the guide. Then you cannot have any radius on the corner of the smaller to larger diameter portion of the guide tool. Quote Link to comment Share on other sites More sharing options...
naviathan Posted June 5, 2008 Author Share Posted June 5, 2008 I build my own guide tools, on a lathe. You cannot use a flat punch or something, if that is what you are asking. It has to have a pilot, that barely slips in the guide (basicly the size of the valve.) Then you have to have an OD that is about .005" smaller than the od of the guide. Then you cannot have any radius on the corner of the smaller to larger diameter portion of the guide tool. Got it, work around the guides. Quote Link to comment Share on other sites More sharing options...
1 fast z Posted June 5, 2008 Share Posted June 5, 2008 In my early days, that is what I used to do, you should be fine. Quote Link to comment Share on other sites More sharing options...
naviathan Posted June 5, 2008 Author Share Posted June 5, 2008 Thanks for the help! Quote Link to comment Share on other sites More sharing options...
josh817 Posted June 25, 2008 Share Posted June 25, 2008 Uh yah I'm doing my work with seats and guides in and its a pain in my ass. Mainly because I don't have any dremel heads which can get in there and smooth out the bowl without hitting the guides. Masking tape works well to protect the seats though. Quote Link to comment Share on other sites More sharing options...
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