i have had my kit apart 3 times in 3 years for something clogging the nitrous filter. My question is, what do you guys use to seal the AN fittings to each other? I have used the thread sealant paste and i have used the teflon tape, which works better for a long period of time?

 

Nothing if its an AN fitting. If it's a NPT thread I use teflon paste or TFE pipe thread sealant. Teflon tape is NOT reccomended.

 

i use paste the tape can come apart and cause failures to your system

 

Yes the AN connections are an interference fit and thus no sealant used/needed. Pipe threads yes, use sealant, lock tight or teflon paste.
Robert

 

We just finished my TNT install last night and i put a little bit of paste on all fittings lol, just to be safe.

 

Technically AN fittings are not an interference fit. A real AN fitting is 37.5 degree on both the male and female side creating a uniform sealing surface. Sometimes you will have an interference fit when using fittings from different manufactures. For example all NOS fittings are 37.5 but some of the N/X fittings are 45 degree which will result in an interference fit. The main problem with this that over time using a 45 degree and a 37.5 will result in one or both of the fittings being damaged. Also when using two different fittings they require more torque to seal. Someone gets used to how much torque is needed to seal two fittings of different angles. Then if they end up with fittings that are a true AN they can end up over torqueing them which can also lead to leaks as well as damaging the fittings.

 

That's true, JIC and SAE. For the most part brass fittings are SAE, and steel/stainless steel are jic. Now you can interchange most size fittings. Furthermore, you can get brass in jic, and steel in sae, so it gets real confusing. They do make an insert for sealing problems, it's a copper like flared washer that sits inbetween the fitings. You can also use a dab of red lock tight on the flair surface, but this does not allways cure the leak.
Robert

 

Is ARP thread sealant ok to use? Thats all I had so I used it on all the NPT fittings.