thehelix112 Posted October 9, 2005 Share Posted October 9, 2005 You could just buy a BSPT die and die the fitting that you want to go in there. Thats what I did. The 1/8 BSPT thread is smaller than the 1/8 NPT though they are the same diameter at some point. Thus you're not changing the thread on the NPT fitting, you're just making it all smaller. I'm tired so sorry if that makes no sense. Dave Quote Link to comment Share on other sites More sharing options...
BleachZee Posted July 3, 2006 Share Posted July 3, 2006 Dude...the Nissan block is NOT 1/8" NPT...it is 1/8" BSPT...British Pipe Thread. Yasin Is 1/8" the diameter of the thread or is that the thread pitch? I just ordered a 1/8" BSP to -4 AN adaptor and the BSP end is way too small of a diameter to thread into the Nissan T on the side of the block. There is a lot of slop. I have the -4 stainless line so the other end fits the line perfect. Did I get the wrong part? This is the only British adaptor they have available... http://www.atpturbo.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=ATP-FTG-033&Category_Code=FTG For the turbo side, I got the aluminum T3 plate they make, a 0.060 restrictor, and adaptor to go to the -4 AN line. All looks good on that end. Quote Link to comment Share on other sites More sharing options...
slownrusty Posted July 4, 2006 Share Posted July 4, 2006 Thread pitch! Quote Link to comment Share on other sites More sharing options...
Doug71zt Posted July 4, 2006 Share Posted July 4, 2006 You got the wrong fitting. The block is acually BSPT 1/8 27 TPI. It is a tapered fitting that seals by interference fit. The fitting you have there is a straight thread BSP 1/8 fitting that seals with a oring. Honestly, the easiest way to solve the problem is to do what 240Hoke did and re-tap the block for NPT. That makes the fitting game real easy and the adapter for NPT to AN/JIC can be found locally. Good luck. Doug Quote Link to comment Share on other sites More sharing options...
BleachZee Posted July 5, 2006 Share Posted July 5, 2006 I went to the hardware store and they dont' have anything like these fittings. but, I could certainly buy the fitting I need online if I did re-tap the T. Quote Link to comment Share on other sites More sharing options...
CarJway Posted July 5, 2006 Share Posted July 5, 2006 This is what I did... I will take some pictures and get part numbers when I get home... 1 fitting that is 1/8 BSPT to 1/8 NPT... Then a 1/8 NPT block; with two female inlets and one male output to insert into the BSPT to NPT adapter. It's only two fittings and solves the problem... Quote Link to comment Share on other sites More sharing options...
LLave Posted July 5, 2006 Share Posted July 5, 2006 McMaster Carr (http://www.mcmaster.com) can be a great source for fittings of all sorts. The have just about everything. Quote Link to comment Share on other sites More sharing options...
BleachZee Posted July 6, 2006 Share Posted July 6, 2006 1 fitting that is 1/8 BSPT to 1/8 NPT... part # 4860K141 or part # 4860K611 One is male/female, the other is male/male both BSPT to NPT http://www.mcmaster.com/ Quote Link to comment Share on other sites More sharing options...
veritech-z Posted July 6, 2006 Share Posted July 6, 2006 I'm pretty sure that the 1/8" just describes the internal diameter of the passage on pipe fittings. The threads are listed in TPI-threads per inch. Quote Link to comment Share on other sites More sharing options...
BleachZee Posted July 11, 2006 Share Posted July 11, 2006 part # 4860K141or part # 4860K611 One is male/female' date=' the other is male/male both BSPT to NPT http://www.mcmaster.com/[/quote'] I received these fittings today. they are not correct for the car. The thread is tapered but they still fit inside the threads on the T block. there is just a tiny bit of slop... the threads do not even begin to engauge. There are no other BSPT fittings! Quote Link to comment Share on other sites More sharing options...
CarJway Posted July 11, 2006 Share Posted July 11, 2006 I received these fittings today. they are not correct for the car. The thread is tapered but they still fit inside the threads on the T block. there is just a tiny bit of slop... the threads do not even begin to engauge. There are no other BSPT fittings! Geez, I am a moron. I didn't realize your were asking a question in your earlier post; I thought you were just stating some part numbers. From Summit Racing... Auto meter # ATM-2269 1/8 bspt-1/8 NPT http://store.summitracing.com/partdetail.asp?autofilter=1&part=ATM%2D2269&N=115&autoview=sku Nitrous Oxide Systems(NOS) # 16775NOS 1/8 NPT Block http://www.holley.com/16775NOS.asp Quote Link to comment Share on other sites More sharing options...
CarJway Posted July 12, 2006 Share Posted July 12, 2006 Here's a picture... It's was at night... Quote Link to comment Share on other sites More sharing options...
BleachZee Posted July 12, 2006 Share Posted July 12, 2006 ok, so you replaced the block. I thought you guys were saying the top plug in the factory turbo "T" was 1/8 BSPT. i was trying to get a fitting for that. I haven't tried screwing this into the actual L28 block. If it does fit all I need is that NPT T-block. the first item you posted looks to be exactly what I got from McMaster My turbo engine is running like crap though... so I'm just using the stock line for now.. Quote Link to comment Share on other sites More sharing options...
CarJway Posted July 12, 2006 Share Posted July 12, 2006 Hey at least your Engine is running.... : ( I just went over to that block due to the availability of NPT items.(ie my oil sending unit, oil line) You can pick that block up for a couple of bucks; Your local speed shop might have it too. Quote Link to comment Share on other sites More sharing options...
BleachZee Posted July 12, 2006 Share Posted July 12, 2006 ya, the 1/8 BSPT I ordered from McMaster fits the L28 block perfect. so I need the 1/8 NPT T block, and a new sender unit.... and a couple straight through fittings. NPT to -4 AN. anyway, the rest is easy to get. Thanks for the help. oh, my turbo Z is running better now. No more poping but the power still isn't there. It needs some tweaking. (its all stock now, so it really shouldn't be this hard) but it is good to be driving it again after the engine swap 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.