banshee9090 Posted October 18, 2010 Author Report Share Posted October 18, 2010 i would not touch them. it weakens normal pistons. you can buy some that are already manufactured with the bigger windows, and boost porting. on those, they are beefed up when they make them. thanks alot for the excellent advice. Quote Link to comment Share on other sites More sharing options...
banshee9090 Posted October 19, 2010 Author Report Share Posted October 19, 2010 i would not touch them. it weakens normal pistons. you can buy some that are already manufactured with the bigger windows, and boost porting. on those, they are beefed up when they make them. Well ok I know now how to do the correct measurement, thank you very match,for exhaust I got 184 degrees, transfer 25 degrees to correct that the top of the port will open about 1.5-2mm to get exhaust 186-188 degrees and transfers to 30-31 degrees , and what about total open time of 128-124 degrees and blow-down between 29.5 and 32 degrees I still do not know how to do it or how to collect total open time and blow-down? Quote Link to comment Share on other sites More sharing options...
AKheathen Posted October 19, 2010 Report Share Posted October 19, 2010 Well ok I know now how to do the correct measurement, thank you very match,for exhaust I got 184 degrees, transfer 25 degrees to correct that the top of the port will open about 1.5-2mm to get exhaust 186-188 degrees and transfers to 30-31 degrees , and what about total open time of 128-124 degrees and blow-down between 29.5 and 32 degrees I still do not know how to do it or how to collect total open time and blow-down? ok, if your exhaust is 184 degrees, then that 25 degrees after that that the thransfers open is the blow-down. the math says your transfers are at 126 degrees right now. you first raise the exhaust untill it reaches what you want. you can make a mark with permenant marker where the top of the port should be (186 degrees) and then cut the exhaust. then bolt it back together and measure your work. then, do the same to get your blow-down Quote Link to comment Share on other sites More sharing options...
banshee9090 Posted October 20, 2010 Author Report Share Posted October 20, 2010 ok, if your exhaust is 184 degrees, then that 25 degrees after that that the thransfers open is the blow-down. the math says your transfers are at 126 degrees right now. you first raise the exhaust untill it reaches what you want. you can make a mark with permenant marker where the top of the port should be (186 degrees) and then cut the exhaust. then bolt it back together and measure your work. then, do the same to get your blow-down i really appreciate all kind of help, i will be in touch thanks alot. Quote Link to comment Share on other sites More sharing options...
AKheathen Posted October 20, 2010 Report Share Posted October 20, 2010 i really appreciate all kind of help, i will be in touch thanks alot. no problem man Quote Link to comment Share on other sites More sharing options...
MacRacer1 Posted October 23, 2010 Report Share Posted October 23, 2010 That is the best porting I have ever seen! lol Quote Link to comment Share on other sites More sharing options...
banshee9090 Posted November 23, 2010 Author Report Share Posted November 23, 2010 I m plan to go dune this week , Now every thing looks ok with the bike, put one thing I doubt about , compression both side 190 + - 5 squish test is ok pleas note I run 95 gas do u think that is ok for dune 4mil porting 66.5 bore ,4mil 22+2 dooms elev. 2600 temp. wither 78 - 45 f , stock pilot jet 300 main jet stock carb , needle med clip, out side k&n air filter , stock sprocket, with stock cool heed comparison is about 140-130 if I remember witch cool heed is ok for this setup pleas. Quote Link to comment Share on other sites More sharing options...
banshee9090 Posted November 23, 2010 Author Report Share Posted November 23, 2010 That is the best porting I have ever seen! lol i would go trail this week man i stil did not race with any, thanks Quote Link to comment Share on other sites More sharing options...
banshee9090 Posted November 23, 2010 Author Report Share Posted November 23, 2010 I m plan to go dune this week , Now every thing looks ok with the bike, put one thing I doubt about , compression both side 190 + - 5 squish test is ok pleas note I run 95 gas do u think that is ok for dune 4mil porting 66.5 bore ,4mil 22+2 dooms elev. 2600 temp. wither 78 - 45 f , stock pilot jet 300 main jet stock carb , needle med clip, out side k&n air filter , stock sprocket, with stock cool heed comparison is about 140-130 if I remember witch cool heed is ok for this setup pleas. sorry elevatin is 2060 ft. also i run IV STAGE pipe!! Quote Link to comment Share on other sites More sharing options...
Larry's Shee Posted November 23, 2010 Report Share Posted November 23, 2010 Been wondering how your build was going. Can't comment on your settings other than keep eye on plugs. Does it run good? Are you satisfied with your port job? Quote Link to comment Share on other sites More sharing options...
banshee9090 Posted November 23, 2010 Author Report Share Posted November 23, 2010 Been wondering how your build was going. Can't comment on your settings other than keep eye on plugs. Does it run good? Are you satisfied with your port job? yes man with 2nd gear for about 10 meter race at home, decent power !! Quote Link to comment Share on other sites More sharing options...
banshee9090 Posted November 23, 2010 Author Report Share Posted November 23, 2010 yes man with 2nd gear for about 10 meter race at home, decent power !! Thank guys I already found the answer from old topic for AKheathen Quote Link to comment Share on other sites More sharing options...
AKheathen Posted November 23, 2010 Report Share Posted November 23, 2010 with that kind of compression, i would be running 98-100 oct min......and that's pushing it. i would do proper plug chops first and look closely for any specs of metal on them, or if they loosen up. Quote Link to comment Share on other sites More sharing options...
camatv Posted November 24, 2010 Report Share Posted November 24, 2010 hmmm Quote Link to comment Share on other sites More sharing options...
banshee9090 Posted November 24, 2010 Author Report Share Posted November 24, 2010 (edited) with that kind of compression, i would be running 98-100 oct min......and that's pushing it. i would do proper plug chops first and look closely for any specs of metal on them, or if they loosen up. I really appreciate all advice man. Edited November 24, 2010 by banshee9090 Quote Link to comment Share on other sites More sharing options...
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