mobythevan Posted December 11, 2003 Share Posted December 11, 2003 I've found a few places that have aluminum, but I am looking for more sources that sell female 3/8" NPT weld-in bungs that are steel. I need some for the sensors with MegaSquirt and also for my fuel tank sump. Quote Link to comment Share on other sites More sharing options...
Tim240z Posted December 11, 2003 Share Posted December 11, 2003 Moby, are these for O2 sensors? Quote Link to comment Share on other sites More sharing options...
mobythevan Posted December 11, 2003 Author Share Posted December 11, 2003 no, these are for the IAT and coolant temp sensors. In the MS manual they say these sensors use 3/8 NPT. I also wanted to use them on my fuel sump. Quote Link to comment Share on other sites More sharing options...
Tim240z Posted December 11, 2003 Share Posted December 11, 2003 Weel, then I don't have anything to offer you . Although, most parts stores should carry them? If you do need O2 sensor bungs to weld in, the cheapest way i have found is to buy 14mm spark plug anti foul extentions, cut off the end, and weld them in...works great. Tim Quote Link to comment Share on other sites More sharing options...
mobythevan Posted December 11, 2003 Author Share Posted December 11, 2003 Thanks anyway Tim, I have a few O2 bungs laying around, but they are too big for the other sensors. I'll go looking around today at lunch. Quote Link to comment Share on other sites More sharing options...
Dave Posted December 11, 2003 Share Posted December 11, 2003 What about using a 3/8" black pipe coupling and cutting it in half since it is threaded on both ends. Quote Link to comment Share on other sites More sharing options...
mobythevan Posted December 11, 2003 Author Share Posted December 11, 2003 That will be my last resort. Marine shops have them in stainless steel, I was just looking for the best mix of price and finish. Quote Link to comment Share on other sites More sharing options...
mobythevan Posted December 11, 2003 Author Share Posted December 11, 2003 Finally found some, ARP actually makes them. Kind of pricey for me at $8 each for the 3/8 steel bung. I'm cheap. http://www.tognottisautoworld.com/Products/arp/bulk_fas/WeldBung.asp Quote Link to comment Share on other sites More sharing options...
Guest Zcarsmakemyheadhurt Posted December 14, 2003 Share Posted December 14, 2003 I'm gonna use a Russel fuel bulkhead probably. Are you doing a true sump or just tapping in? Love to know what the hell is going on with the coolant temp sensor. Can I ask what type of sensore you gotta use? I wan't to see how one of these Megasquirt cars come along. Any links to fast Megasquirt cars? Maybe we will see one soon. Quote Link to comment Share on other sites More sharing options...
SleeperZ Posted December 14, 2003 Share Posted December 14, 2003 I just tapped out my thermostat housing to accomodate my Autometer water temperature sensor. I tapped 1/4" NPT for that though, 3/8" NPT is big; are you sure you have to get a sensor that big? Quote Link to comment Share on other sites More sharing options...
mobythevan Posted December 15, 2003 Author Share Posted December 15, 2003 I am using the nissan head temp sensor instead of the GM coolant sensor, but I am using the GM air temp sensor. Yeah, it is 3/8 npt. I welded the bung into the j-pipe today for the first round of tuning on the car. I went to a bearing shop and bought some mild steel 3/8 npt couplers and cut them in half to make my own weld in bungs. Worked really well and at $5 for 4 bungs as compared to $30 for 4 of the ARP types. I am making a real sump on the bottom of the gas tank, just like the kits that summit sells. I'll weld in two of the 3/8 npt bungs like their kit. I have the sheet metal so I can do the sump for under $10 instead of buying the kit. Things are moving along good with the MS computer. I am paced by dollars right now because I have to upgrade injectors, fuel rail, clutch, and fuel pump. But I'll start messing around with the stock injectors, stock fuel pump and slipping clutch until funds become available. Quote Link to comment Share on other sites More sharing options...
Guest Zcarsmakemyheadhurt Posted December 15, 2003 Share Posted December 15, 2003 Moby, I don't want to knock what your doing or how your are doing it. But look into placing the air temp sensore after the T-body on the intake. Drill tap and done. As for your sump, I would build my own also. The kit can hang too low making gravity feed a bitch. It could also bang the floor when launching hard at the track. Right?[/img] Quote Link to comment Share on other sites More sharing options...
mobythevan Posted December 15, 2003 Author Share Posted December 15, 2003 I don't want to knock what your doing or how your are doing it. That is a fair question because we see a lot of discussion about where to place the air temp sensor. The placment in the j-pipe is temporary until I install my intercooler. I just wanted to get back on the road for a couple weeks until I put the intercooler in(I am having withdrawals from the car being stuck in the garage), then several things in my setup have to change. I have to take the intake manifold off to port it for the 60mm TB, so then I will look at putting the air sensor after the TB. Quote Link to comment Share on other sites More sharing options...
z-ya Posted December 18, 2003 Share Posted December 18, 2003 I dont' think you want the air temp sensor in the J-Pipe. Put it in the intake plenum. The temp in the J-Pipe won't be as accurate as in the intake itself. That will give the MS the most accurate reading on the air actually entering the combustion chamber. Just drill out one of the unused holes for a 3/8" NPT, tap it, and you are good to go. That's what I did for both coolant and air temp sensors. Pete Quote Link to comment Share on other sites More sharing options...
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