Lunar240z Posted July 13, 2006 Share Posted July 13, 2006 I just bought some -8 fuel rail stock from ross machine racing, and i'm wondering how the machining is done for o-ring style injector holes, anybody got any info? Quote Link to comment Share on other sites More sharing options...
evildky Posted July 13, 2006 Share Posted July 13, 2006 if you plan to use O-ring injectors the holes have to be perfectly spaced or it's gonna leak, or for about $100 you can buy one made by pallnet complete with mounting brackets and a/n fittings, if you have access to a machineshop to get it all right then go for it, if not pallnet is a bargain Quote Link to comment Share on other sites More sharing options...
jgkurz Posted July 13, 2006 Share Posted July 13, 2006 I fabbed my own O ring rail about six months before a couple folks started producing them. It was a major PITA. You will need a good drill press. Not the Craftsman type but a real machinist drill press. You will need to measure your injector spacing with dial calipers and with them secured and centered in their respective ports. Next you will need a special hole reamer to properly surface the course surface after drilling. Once that's done you will need to fabricate the mounts, fuel pressure regulator and fuel line fittings. Have I convinced you yet????? Quote Link to comment Share on other sites More sharing options...
Lunar240z Posted July 13, 2006 Author Share Posted July 13, 2006 there's a good drill press at my work...where do i get the "special hole reamer" ? i'm trying to do as much DIY stuff as i can. i gotta get this thing done on a budget. Quote Link to comment Share on other sites More sharing options...
jgkurz Posted July 13, 2006 Share Posted July 13, 2006 You would need a straight flute reamer like this one from Granger. It will finish the bore much smoother than a drill bit. The final bore size should be about .020 less than your O ring diameter. You should also read the SDS link on building fuel rails. http://www.grainger.com/Grainger/wwg/itemDetailsRender.shtml?ItemId=1611661853 http://sdsefi.com/techrail.htm Quote Link to comment Share on other sites More sharing options...
Lunar240z Posted June 11, 2007 Author Share Posted June 11, 2007 My fuel rail orings are .450 in,so .020 less would be .430, the two reamers that come closest are .4375, and .4219 respectively. Would it be better to be a little tight or a little loose? The reason its been so long is beause my machinist made me an F'd up one, without using a reamer, and an extra hole that he plugged with an allen plug, and im finally getting around to getting the reamer for him to make a correct rail. Quote Link to comment Share on other sites More sharing options...
bodie Posted June 12, 2007 Share Posted June 12, 2007 http://www.rossmachineracing.com/injectortool.html i found this a couple weeks ago, though about buying one but havent yet, prob wont untill i for sure will need it Quote Link to comment Share on other sites More sharing options...
Brad-ManQ45 Posted June 14, 2007 Share Posted June 14, 2007 Looks like he has the import size injectors - 14mm is > .5 inch. I'd say he has 11mm injectors - Japanese Import size - not American. That tool will be too big... http://www.rossmachineracing.com/injectortool11mm.html is the 11mm one... Quote Link to comment Share on other sites More sharing options...
Administrators RTz Posted June 15, 2007 Administrators Share Posted June 15, 2007 http://www.rossmachineracing.com/injectortool.html i found this a couple weeks ago, though about buying one but havent yet, prob wont untill i for sure will need it That is the tool I own/use. Its a great fit for the manifold side but I prefer it were a little tighter fit for the rail side. I havent had a leak yet... but I'm not interested in making the bet that I never will. On the shopping list is a non-standard reamer for rail machining. Quote Link to comment Share on other sites More sharing options...
Administrators RTz Posted June 15, 2007 Administrators Share Posted June 15, 2007 ... and im finally getting around to getting the reamer for him to make a correct rail. Why does this sound backward? I sure wish my customers would bring ME the tools I need Quote Link to comment Share on other sites More sharing options...
Lunar240z Posted June 15, 2007 Author Share Posted June 15, 2007 its because hes free Quote Link to comment Share on other sites More sharing options...
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