sotaorava Posted December 24, 2012 Share Posted December 24, 2012 greetings i have read all the head topics from this forum and about ready to port and polish my n42 head some small basic stuff nothing fancy... if you can post pictures about your n42 heads i can have some references in n42 what part needs the most grinding or can benefit the most from grinding? i dont plan welding chambers or chancing bigger valves engine is gonna be L31 stroker with webers and mild cam for street use. Quote Link to comment Share on other sites More sharing options...
duragg Posted December 24, 2012 Share Posted December 24, 2012 (edited) Look for my thread "Green machine gets a new motor" I did a very mild port job. Matched the head to the intake for smooth transition and knocked off the bigger ridges. The L490 Isky cam has been good to me, but its a 4-7k situation. Look forward to pix. Edited December 24, 2012 by duragg Quote Link to comment Share on other sites More sharing options...
sotaorava Posted December 24, 2012 Author Share Posted December 24, 2012 (edited) hhmm couldnt found it. tryied both Greem and Green machine gets a new motor could you post link to it. here is one picture i smoothen the valve area and intake runner. its not ready needs a bit polishing and valve job... but should i do more for combustion chamber? Edited December 24, 2012 by sotaorava Quote Link to comment Share on other sites More sharing options...
skirkland1980 Posted December 24, 2012 Share Posted December 24, 2012 pic of polished n42 chamber Quote Link to comment Share on other sites More sharing options...
sotaorava Posted December 24, 2012 Author Share Posted December 24, 2012 thank you... it seems that you have smoothen it quite a bit. Quote Link to comment Share on other sites More sharing options...
skirkland1980 Posted December 24, 2012 Share Posted December 24, 2012 Not me. This is from Timz. I hope he doesn't mind... Quote Link to comment Share on other sites More sharing options...
duragg Posted December 24, 2012 Share Posted December 24, 2012 Poor spelling,sorry Link: http://forums.hybridz.org/topic/100267-green-machine-gets-a-new-motor/?hl=green+machine Quote Link to comment Share on other sites More sharing options...
Xnke Posted December 25, 2012 Share Posted December 25, 2012 Re-read the porting threads here, and take a look at this photo. No sharp edges! Quote Link to comment Share on other sites More sharing options...
PMC raceengines Posted December 25, 2012 Share Posted December 25, 2012 [ attachment=46362:15-05-111.JPG] N42 road race engine 2.8 made 320hp Quote Link to comment Share on other sites More sharing options...
PMC raceengines Posted December 25, 2012 Share Posted December 25, 2012 stroker race port this port made 370hp engine Quote Link to comment Share on other sites More sharing options...
sotaorava Posted December 25, 2012 Author Share Posted December 25, 2012 thank you very much! Quote Link to comment Share on other sites More sharing options...
Xnke Posted December 25, 2012 Share Posted December 25, 2012 Peter, How'd Gordo's engine run? En't never found the answer to that story, and that first lot you posted up looks like the one you did for him. Quote Link to comment Share on other sites More sharing options...
PMC raceengines Posted December 25, 2012 Share Posted December 25, 2012 Gordo has been running very strong , the chamber shot is his head after i worked it over , there is a few youtube vids off it racing aganst a gtr and other sports cars at PI , its a good L28 that one Quote Link to comment Share on other sites More sharing options...
PMC raceengines Posted December 25, 2012 Share Posted December 25, 2012 (edited) Gordo at work in the 240z L28 Edited December 25, 2012 by PMC raceengines Quote Link to comment Share on other sites More sharing options...
sotaorava Posted December 26, 2012 Author Share Posted December 26, 2012 have you removed valve guides or just grinded around them? Quote Link to comment Share on other sites More sharing options...
PMC raceengines Posted December 26, 2012 Share Posted December 26, 2012 I remove them every time Quote Link to comment Share on other sites More sharing options...
sotaorava Posted December 26, 2012 Author Share Posted December 26, 2012 they are just pressure fit right? so you can push them out? Quote Link to comment Share on other sites More sharing options...
Tony D Posted December 26, 2012 Share Posted December 26, 2012 Service manual describes process. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.