Rippthrough 98 Posted February 8, 2006 Now we've got a new head to play with thanks to 15valver, just wondering if anyone had any porting advice for it? I remember the shenpar/Retro cars article said it was OK to remove the protruding valve guide in the ports?! Sounds a bit worrying to me, so I thought I'd ask the experts on here for opinions? Share this post Link to post Share on other sites
jackherer 543 Posted February 9, 2006 I assume this is the mi16 head? this thread is in completely the wrong place if it is about the Mi16 Share this post Link to post Share on other sites
M@tt 77 Posted February 9, 2006 (edited) not sure if your on foldershare or not but there are some very useful pics of cut through sections of the mi16 head which shoulkd hopefully give you a better idea on what can be done. i've uploaded them to my photobucket site if that's any use http://img.photobucket.com/albums/v230/meb...0_5883Small.jpg http://img.photobucket.com/albums/v230/meb...0_5882Small.jpg http://img.photobucket.com/albums/v230/meb...0_5881Small.jpg http://img.photobucket.com/albums/v230/meb...0_5880Small.jpg http://img.photobucket.com/albums/v230/meb...0_5879Small.jpg http://img.photobucket.com/albums/v230/meb...0_5878Small.jpg http://img.photobucket.com/albums/v230/meb...0_5878Small.jpg http://img.photobucket.com/albums/v230/meb...0_5877Small.jpg http://img.photobucket.com/albums/v230/meb...0_5876Small.jpg http://img.photobucket.com/albums/v230/meb...0_5875Small.jpg http://img.photobucket.com/albums/v230/meb...0_5874Small.jpg http://img.photobucket.com/albums/v230/meb...0_5885Small.jpg also you might find this guide useful http://www.sa-motorsports.com/diyport.shtm Edited February 9, 2006 by M@tt Share this post Link to post Share on other sites
christopher 5 1 Cars Posted February 9, 2006 I have the retro cars artice that was written by shenpar if it was the one about TU engines.... And yes it says that that there is sufficient guid in the head no problem.... But don't underestimate the gain in flow in removing the boss and adjusting the profile of the valve stem end... BTW I'm not saying this is ok to do...Just that I am considering it too.. Would like other opinions....Obviously I am talking about a TU Share this post Link to post Share on other sites
Rippthrough 98 Posted February 9, 2006 I have the retro cars artice that was written by shenpar if it was the one about TU engines.... And yes it says that that there is sufficient guid in the head no problem.... But don't underestimate the gain in flow in removing the boss and adjusting the profile of the valve stem end... BTW I'm not saying this is ok to do...Just that I am considering it too.. Would like other opinions....Obviously I am talking about a TU So was I Nice to get the responce from you guys though Share this post Link to post Share on other sites
TB_205GTI 1 Posted February 9, 2006 (edited) PeugeotSport Denamrk removes them. If it's good enough for them, then it's good enough for me. I've done two heads, and I removed them on both, however they both run std. cams. Edited February 9, 2006 by TB_205GTI Share this post Link to post Share on other sites
DrSeuss 0 Posted February 9, 2006 PeugeotSport Denamrk removes them. If it's good enough for them, then it's good enough for me. I've done two heads, and I removed them on both, however they both run std. cams. You might get more power but you will still affect the longevity of the valve train. Share this post Link to post Share on other sites
christopher 5 1 Cars Posted February 9, 2006 (edited) What head is it? Probably a TU3 Matt BTW looking at sams head you did..You seemed to not remove the guide but instead smooth it out.. http://dcoe.net/gallery/qephead/ported_tu5_1.jpg not sure if your on foldershare or not but there are some very useful pics of cut through sections of the mi16 head which shoulkd hopefully give you a better idea on what can be done. i've uploaded them to my photobucket site if that's any use Thats a great photo that. I wish someone would cut a TU24 head open so I could see that... That pic show clearly that the guide on the inlet port cannot be shorted but maybe ok on the exhausr´t.. (I take it teh bigger valve is the inlet one) Edited February 9, 2006 by christopher Share this post Link to post Share on other sites
Rippthrough 98 Posted February 9, 2006 Probably a TU3 MattBTW looking at sams head you did..You seemed to not remove the guide but instead smooth it out.. http://dcoe.net/gallery/qephead/ported_tu5_1.jpg Thats a great photo that. I wish someone would cut a TU24 head open so I could see that... That pic show clearly that the guide on the inlet port cannot be shorted but maybe ok on the exhausr´t.. (I take it teh bigger valve is the inlet one) Yeah, Tu3 head from an xsi/ax gt? Share this post Link to post Share on other sites
Mattsav 1 Posted February 10, 2006 I always fit new guides. You can remove some of the boss but I chamfer the end of the guide and leave it std length. Never been a fan of just grinding the guide away, it looks like a bodge and reduces the life of it. The best way to get more power is to fit a Head from a 106 Rallye/1400 XSI/1600 Tu. These have bigger valves and much more flow as std. There's a nasty little ridge in the back of the Tu3 heads (the casting thickness is not uniform) and to get the proper port shape you end up with a hole in the port!! (been there twice now and it kind of ruins your day) The only problem is the inlet port spacing is different on the big valve heads. Share this post Link to post Share on other sites
christopher 5 1 Cars Posted February 10, 2006 I always fit new guides. You can remove some of the boss but I chamfer the end of the guide and leave it std length. Never been a fan of just grinding the guide away, it looks like a bodge and reduces the life of it. The best way to get more power is to fit a Head from a 106 Rallye/1400 XSI/1600 Tu. These have bigger valves and much more flow as std. There's a nasty little ridge in the back of the Tu3 heads (the casting thickness is not uniform) and to get the proper port shape you end up with a hole in the port!! (been there twice now and it kind of ruins your day) The only problem is the inlet port spacing is different on the big valve heads. There's a nasty little ridge in the back of the Tu3 heads Wheres this then Matt? Share this post Link to post Share on other sites
Rippthrough 98 Posted February 15, 2006 There's a nasty little ridge in the back of the Tu3 heads (the casting thickness is not uniform) and to get the proper port shape you end up with a hole in the port!! That ridge that's about 2-3cm into the inlets? I can't get rid of that then? Share this post Link to post Share on other sites
Rippthrough 98 Posted May 19, 2006 Anyone know if you can use anything other than weld to fill in the dead zone behind the inlet valve guide? I've heard that some of the americans use some form of epoxy, but I would have thought it would eventually fall out from the vibration. There's no way I can get my welding gear in there, the only other option is to reshape the guide a little and just smooth the bump, but it would be better if something could fill it. Share this post Link to post Share on other sites
Rippthrough 98 Posted May 20, 2006 So that's a no then Either that or a "It took me years of research to find something that works, bugger off" Reshaping it is. Share this post Link to post Share on other sites
