classic inlines 1b adapter

kosanders

Active member
I purchased the 1b adapter from Classic Inlines. What is the threaded hole in the back for and what size is it? I cant find anything that fits...
 
I did try 2 parts stores with no luck!!!

Since the adapter is designed for an Autolite 1100, I looked at an old one I have and it appears to be a PCV fitting but my original doesn't fit!
 
So I think this is it? But that really doesn't explain why the parts store guys are clueless on the threads.....unless it is a screwed up "new" part

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Did you try 1/4 pipe thread? There is also a metric pipe thread
 
looks like 1/8 pipe to me , sadly all you need nowadays to work in a parts store is a clean drivers license , and can use a computer , Automotive Knowledge is a plus they say , but wont pay for it ( ask me how I know )
 
We have a little maxim here at my house about getting reliable information at the auto parts store: ask an older guy or the Hispanic dude. The first one knows how to use the paper catalogues and the latter one actually works on cars.

Everybody else is just drawing a check.
 
looks like ur eliminating the "water heated choke"?
Just wanna plug the 'flow hole'?
Why? even in sw & se USA still need a choke...
 
That is the PCV hole on the new carb mounting plate.

The choke runs off a small air pipe attached to the exhaust manifold and the pulloff spring.

You might mean the water cooled/heated carb base with the two hose bungs on either end. That is a different issue and the new plate seems to have eliminated it entirely.
 
Thanks guys......I called CI and they don't remember either, they said to go to a True Value and they should have one.
 
Definitely low-tech solution. I stripped a couple of garden hose n' copper tubing fittings from some PO of my Stang.
 
About any decent auto parts house should have the good brass hose fittings. X2 I am with FalconSedanDelivery that it looks like a 1/8 inch pipe thread in the picture. Pipe threads have a taper so if it turns into it easy a few threads and starts to get tight it is probably right. Oh and wrap some Teflon tape on the threads or use some pipe dope. :thumbup:
 
"...water cooled/heated carb base..."
yes, OK thnx 4 da correction

"...That is the PCV hole..."
oh, OK thnx 4 da correction
I just lvu school, never skip class if I can avoid it.
Thank U sir.
 
Thanks for the help guys.

I've been to 5 different parts stores now. It's 1/8 in but it's not normal.

The only thing that kinda works is 1/8 British.....and it only goes in 3-4 threads.

I called Classic Inlines again but they didn't answer. I sent this email requesting a replacement.

:bang:

We have spoke on the phone a few times regarding the size of the pcv valve hole in the adapter.
I have been to 5 different stores. The only thing that has come close to fitting is a 1/8 British piece and it only goes in for 3-4 threads before stopping.
I am convinced that there must be something wrong with this piece. (especially since you are not sure what you used to tap this hole)
I would like to exchange it for another one, as long as you can tell me what "normal" tap you have used for this hole. I do not think I should have to re-tap a brand new piece.
Also, the picture of the part shows that it has the black anodized finish, as well as the description.

"NOTE: The photo below shows the adapter in a natural finish, which makes it a little easier to see the details, however this photo was taken during the prototype stage before the groove for the idle circuit was machined. All production pieces have the groove, which was machined after anodizing, as shown in the photo above."

Please contact me as soon as possible. I tried a lot of different solutions before breaking down and buying the adapter from you that was made for my application.

Thank you
 
Why not find the plug that more or less fits and then re-tap the hole in the base to match the thread of the plug? They probably have thread pitch gauges at the hardware or auto part store. A tap set is not expensive.

You only need to screw it in once. If you use tape or pipe seal, you're there.
 
get a common 1/8 pipe tap and run it in till it stops ,turn it 1 more revolution and retry the fitting ( you are cutting the threads deeper ) it happens sometimes on pipe threads , just go a bit at a time , no big deal
 
Don't know if this will help but... I got a phenolic spacer and it has a similar hole in it. My original spacer was identical to your old one. When I had a shop install a dual master brake cylinder with power assist they hooked up the power assist hose to that hole using the same fitting that you show in the photo. When I swapped the spacers the fitting screwed right into the new spacer. Hopefully the shop hooked it up correctly(?) but I must admit the power assist does not seem to make a huge difference in braking power. Here's a photo.



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fella might be in Briton & it's an american thread (pitch slope different, and metric diam. as well).
National Course Thread, ASME, etc is for only 1 location in the world, here (& those who've agreed w/us). Some use spanners rather than wrenches, etc -

Kosanders - where R U located, mate?
(Tell me I'm 'all wet", please. But it has happened here B 4...)

just wants a bung to plug the PVC? (that's not recommended is it?).
 
I've thought about this, I just can't seem to get over having to re-tap a new, billet aluminum part. I didn't want to order it in the first place but I gave in, since it's suppose to work!!!

ludwig":33wrx48b said:
Why not find the plug that more or less fits and then re-tap the hole in the base to match the thread of the plug? They probably have thread pitch gauges at the hardware or auto part store. A tap set is not expensive.

You only need to screw it in once. If you use tape or pipe seal, you're there.
 
Are you in Great Briton?
:twisted:
 
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