Plugs for a de-smogged U20 intake manifold

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david premo
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Re: Plugs for a de-smogged U20 intake manifold

Post by david premo »

1/8 X 28 is BSPT
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Linda
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Model: 1500/1600
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Re: Plugs for a de-smogged U20 intake manifold

Post by Linda »

What if any of that epoxy, JB Weld etc gets sucked into the cylinders? Not liking that idea.
If you think the square plugs in the intake are ugly, just think how ugly the engine can look after inhaling bits of debris like that.
I’ll keep the plugs, on my 1600, they got painted by VHT hi temp paint on the exhaust manifold and intake and blend right in, well enough for me at least.
Linda
68 1600 Los Angeles, CA
New owners must read: the ultimate road trip, by Scott- roadsterroadtrip.com-http://www.roadsterroadtrip.com/index.php/readfromstart
orangedawg
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Re: Plugs for a de-smogged U20 intake manifold

Post by orangedawg »

Linda, maybe I mis-stated what my plan is. I'm not going to use any jb weld, epoxy, etc. I am just going to screw them into my manifold and cap them.

And thanks Dave! I am getting closer to this thing actually running decent. Seems to drive just fine around town thanks to your jetting advice for the first time in many many years! Just have an issue now when going on the highway and having no power (after a bit, it won't go over 45-50 mph or so). Maybe running too lean?
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spyder
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Re: Plugs for a de-smogged U20 intake manifold

Post by spyder »

orangedawg wrote: Tue Aug 04, 2020 9:34 am And thanks Dave! I am getting closer to this thing actually running decent. Seems to drive just fine around town thanks to your jetting advice for the first time in many many years! Just have an issue now when going on the highway and having no power (after a bit, it won't go over 45-50 mph or so). Maybe running too lean?
Link them together, it will idle smoother.
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orangedawg
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Re: Plugs for a de-smogged U20 intake manifold

Post by orangedawg »

Spyder, it's kind of hard to tell from your photo, but are those elbows and t's you have in the manifold to link them? And what type of hose are you using?

Thanks!
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Gregs672000
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Re: Plugs for a de-smogged U20 intake manifold

Post by Gregs672000 »

orangedawg wrote: Tue Aug 04, 2020 9:34 am Linda, maybe I mis-stated what my plan is. I'm not going to use any jb weld, epoxy, etc. I am just going to screw them into my manifold and cap them.

And thanks Dave! I am getting closer to this thing actually running decent. Seems to drive just fine around town thanks to your jetting advice for the first time in many many years! Just have an issue now when going on the highway and having no power (after a bit, it won't go over 45-50 mph or so). Maybe running too lean?
Check your gas filter housing for air leaks if you still use it. More than too lean... no fuel sounds like to me. Don't run it hard like that, you can go super lean and detonate even on 92 pump gas in a stock compression U20 with some hot intake air temps like in Eastern WA.
Greg Burrows
'67 2000 #588
Tacoma, WA