RON R FFIM question

[black91turbo]

Does anyone know the thread pitch Ron uses for vacuum provisions on his manifolds? I know it is 1/8 but is NPT, UNF or BSP. The fittings are about the only other thing i have to buy to get this thing in the car! :1zhelp: I tried to search but couldn't find anything except general info...

 

[Muzy]

Pipe thread/npt is tapered and not to hard to see, bigger on the top of the hole, smaller
at the bottom. UNF. if a 1/8 fine thread bolt threads in more than 3 turns it would be unf.
If it turns in 2 and goes tight it is metric. If it has a machined tapper before the threads
start than it's ORB. You are looking at a port with threads right? Or is it male threads you
see? The only exception to the NPT is if a 1/8 pipe fitting dose not go in than it is British pipe thread. Since these is probably domestic forget that. muzy

 

[black91turbo]

Pipe thread/npt is tapered and not to hard to see, bigger on the top of the hole, smaller
at the bottom. UNF. if a 1/8 fine thread bolt threads in more than 3 turns it would be unf.
If it turns in 2 and goes tight it is metric. If it has a machined tapper before the threads
start than it's ORB. You are looking at a port with threads right? Or is it male threads you
see? The only exception to the NPT is if a 1/8 pipe fitting dose not go in than it is British pipe thread. Since these is probably domestic forget that. muzy

yeah it is a port with threads...it must be metric according to your description because I tried a 1/8 NPT and it went in for about two turns and then got tough.

 

[Muzy]

That two turn deal is not for npt, npt gets tighter as it gose in. Is the hole tapered. It
is almost for sure NPT. AS far as I now there is no metic pipe. muzy

 

[figgie]

black87turbo

are you talking about the vacuum port provisions?

If so Ron uses NPT for those.

 

[rs4rush]

Yes its NPT. Get the L shaped vacuum ports so you can tuck the line.

 

[black91turbo]

thanks guys! Where do I get the L shaped ones?

 

[rs4rush]

Napa.