Recently I found the stock ventilator assembly and PCV valve and tubing. I have a 58 step van with a 261 and thought it was kismet. I went to install it and the tubing doesn't quite reach the (updraft) manifold inlet/wiper port. I thought about adjusting the bends in the tube and it may reach. My question is should I abandon the tubing and use hose, and does updraft carburation work with stock the PCV system? Thanks in advance for all advice and or suggestions.
Use a couple of brass compression couplings and add a short length of tubing- - - -steel or copper doesn't matter. Trying to straighten bends on that steel tubing will be a disaster. There's no reason a PCV shouldn't work on an updraft manifold. Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt! There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway Love your enemies and drive 'em nuts!
I took your good advice Jerry. Problem is I cannot locate a coupling with the correct thread size. It's a fine thread and nobody seems to carry it. People guess metric and I assure them it's not. Does anyone know what thread size that goes into the the large bolt for accessories? Wipers and PCV.
That's an "inverted flare" fitting. Measure the outside diameter of the tubing that plugs into it and get the appropriate sized inverted flare nut. Then you'll need to find someone with a double flaring tool the right size. I was suggesting cutting the tube that goes into that fitting and splicing in a short piece of tubing to extend what's already there. You would need two compression couplings and a short piece of tubing to do that, hardware that's available at any big box hardware store.
Here's the fitting I'm talking about- - - -it splices two pieces of steel or copper tubing together:
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt! There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway Love your enemies and drive 'em nuts!
What's an IPS thread? That's a new one on me! "Threads per inch" maybe? Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt! There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway Love your enemies and drive 'em nuts!
IPS could mean Iron Pipe Size in some references. Formally known as NPT - American National Standard Taper Pipe Thread or NPS - American National Standard Straight Pipe Thread (Both under ANSI B1.20.1)
Kevin 1951 Chevy 3100 work truck Follow this saga in Project Journal Photos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together.
All the inverted flare nuts I've ever measured had straight threads, not tapered like an NPT. The small rounded seat below the threads in the fitting in the photo is a dead giveaway that the fitting is an inverted flare. The male and female threads on the same fitting are both taper-thread NPT. Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt! There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway Love your enemies and drive 'em nuts!
Kk I looked it up It literally is a straight thread version of pipe threads Which is why it usually threads a turn or two with pipe fittings before jamming
Copy and pasted from internets:
Straight Pipe Threads for Mechanical Joints, NPSM and NPSL ANSI/ASME B1.20.1, American Pipe Threads Standard. NPSC = National Pipe Straight Coupling.
Also generically referred to as "IPS Threads" or "Iron Straight Threads".
Note that straight pipe threads, unlike tapered pipe thread do not provide any sealing function. Typically, a design that utilizes a straight pipe thread will incorporate a sealing features, like an oring to facilitate fluid sealing
