JustinOlson Posted September 17, 2007 Share Posted September 17, 2007 What is involved in converting a 2JZ over to 1/2" head studs? Z-Gad mentioned that he used Big Block Ford Head Studs in his 2JZ build. Do I need to machined the block and tap it for new threads? What drill size and tap should I use? What size do I drill the head for to clear the studs? Finally which BB ford studs do I buy? Regards, Justin Quote Link to comment Share on other sites More sharing options...
Careless Posted September 18, 2007 Share Posted September 18, 2007 The first questions are answered once you find the correct answer for the last question. Ideally, if the head stud is not more than a millimeter larger than the current studs, then you would drill the holes out to the larger size, and then rethread the existing pattern with the new size... keeping the same pitch. (that's what you're supposed to do with an RB30 + 26 head, since the bolt sizes only differ by .5 mm on opposite ends of the stud threads). If you can find out what studs they are, then the rest would come pretty easy, I'd think. Quote Link to comment Share on other sites More sharing options...
oatmilk Posted September 20, 2007 Share Posted September 20, 2007 not sure if they still have them at that price though. Very knowledgeable people on the JZ engines. Supraforums special : L19 head studs for the 2JZ $450 -------------------------------------------------------------------------------- We currently have 5 sets of L19 stock sized head studs for the 2JZ in stock and are offering a Supraforums special of $450 per set. The headstuds usually sell for $750 a set. These are the same headstuds that we use on our methanol racecar that has handled 45+ psi with no issues. http://www.rrevstore.com/catalog/adv...+supra&x=0&y=0 Please PM or email if you have any questions Brian@rrevmotorsports.com Quote Link to comment Share on other sites More sharing options...
Z-Gad Posted September 21, 2007 Share Posted September 21, 2007 Crap... I forgot to ask my machinist which headstuds he used... I apologize... I'll call him tomorrow (saturday) Regards, mike Quote Link to comment Share on other sites More sharing options...
JustinOlson Posted September 21, 2007 Author Share Posted September 21, 2007 Its all good. I'm in no rush. Justin Quote Link to comment Share on other sites More sharing options...
Z-Gad Posted September 22, 2007 Share Posted September 22, 2007 OK there is not a particular part number for the headstuds... they are an ARP application for the Ford big blocks (i.e. 351). They are under the ARP 4000-series, and are 1/2" by 4.5" long and sold individually directly from ARP. You'll also want the smallest nuts they offer, as there is not any room for a socket. Machine work was also required down into the lifter bores of the cylider head to clearance for the studs/nuts. That's the info I was given... Mike Quote Link to comment Share on other sites More sharing options...
JustinOlson Posted December 26, 2007 Author Share Posted December 26, 2007 I ended up going with L19 stock sized studs as it was just cheaper and easier to go this route. I payed $450+ shipping from RREV motorsports. Regards, Justin Quote Link to comment Share on other sites More sharing options...
Careless Posted December 26, 2007 Share Posted December 26, 2007 uh ohhhhh something evil this way comes 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.