63 Fuelie concern

[Michael G.]

Thanks, Mike

[Timothy B.]

Re: 63 Fuelie concern

Michael,

I am not a fuel injection guy but I will only say if the NOS manifold is tapped for 3/8-16 thread and your old stud does not fit DON'T force it. Will a 3/8"-16 tap screw into the manifold with normal pressure?? Will a 3/8 die or nut thread on the old studs?? If not someone may have been there before you with a better idea..

First, call one of the fuel injection guys on this board and you will get your answer. Purchasing new studs is no problem, correcting striped threads in aluminum is another.

[John D.]

Re: 63 Fuelie concern

Thanks, Mike

Hi Mike, I haven't been on this forum for several days. Mike you certainly have a strange problem. Not typical for sure. THe NOS part is suspicious. (nice judges word). Although repro studs are readily available 3/8-16 is just that. Sounds like someone messed with the threads on your "NOS" baseplate. Try a new 3/8 bolt in your baseplate. Maybe someone put some weird studs in your old baseplate and that is the problem. Hopefully that is it as it's not fun putting 8 new heli coils in as they have to be perfect otherwise the studs will be crocked. Don't force anything. I use loctite when I install the studs. I also use a straight edge and try and get all 8 of them the same height. Or at least within a 1/16 but that's just me.
Write me at johndegreg@aol.com for more help. This forum is not for selling parts or service.
Is your NOS baseplate made by Winter's foundry? Send me pics of it. Does it have a separate distributor spacer? Is it the real deal or is it one of those service replacement ones. Although I never heard of a thread problem with a Kinsler baseplate. But what do I know as I never messed with one. I doubt if it's a Kinsler as his work was excellent. Good luck, John D.

[John M.]

Re: 63 Fuelie concern

Those threads sound like 10mm. They are just a little bigger than 3/8 and will just start and then jam up. I think a 10mm nut will run on a 3/8 16 stud but not vice versa

[Michael G.]

Re: 63 Fuelie concern

The new baseplate threads are correct 3/8-16 threads, I gauged them, and they also easily accept a standard 3/8-16-bolt, so the new baseplate threads are not the problem. The baseplate appears to be unused and original, its Winters, and is dated 11.27.62. I cannot find any difference whatsoever between it and the original one. I will send you some pictures, John.

In any case, I think the studs are the isssue. I've never seen a thread deliberately made like the one on these studs. The only time threads like the ones on this stud are created is when someone doesn't apply enough pressure to the part during thread rolling. This leaves a thread peak underfilled, with wider threads. When you put such a stud in a "normal" aluminum internal thread, it reforms it (not in a good way), so that is why I'm concerned. I can make some correct studs on our CNC lathe, but I thought they might exist somewhere.

I'll contact you directly, John

Thanks for the replies,

Mike

[John D.]

Re: 63 Fuelie concern

All 63 to 65 baseplate studs have a dimple on the top. But only some of the solid axle studs have this dimple. You didn't ask but I have seen up to 5 variations of baseplate studs for 57 to 62.

[Bruce B.]

Re: 63 Fuelie concern

There are a couple of suppliers of the studs in question.
One guy is in PA., and some of the Corvette catalogs also list them.