Paul,
The early cars didn't have those vacuum lines leading to the air cleaner.
Mine is setup correctly and has run great for 20+ years the way I described
it to you. Trust me.
The reason I got rid of my NOS float overflows was because they were a PITA
to snake down and the bracket that held them on was gone so they shook. The
fuel line doesn't shake. Trust me.
Mike
----- Original Message -----
From: "Pam & Paul Bauman" <plhbauman@earthlink.net>
To: "Matt Silvey" <matt12@rcip.com>
Cc: "Autox" <datsun-roadsters@autox.team.net>
Sent: Thursday, May 03, 2001 11:39 PM
Subject: Re: overflow tube
> Matt:
>
> I'm beginning to think there is something to this. The problem I mentioned
> in my earlier post about needle profiles and performance may be related to
> this. I'll be willing to bet that just about every car with SU carbs has a
> different overflow tube setup on it. If you examine what this tube does,
> it's clear that it is more than just a fuel dump device.
>
> Looking at diagrams of the carbs, it appears that the tube acts as vent in
> the float chamber, allowing the correct amount of gas to flow in at the
> proper rate. It's possible that incorrect placement of the overflow tube
> could cause more than just an engine fire.
>
> If your roadster is running good on SUs, please let me know how the
overflow
> tubes are set up. At worst, we may discover what not to do when changing
> these things out.
>
> Paul Bauman
> Westminster, CA
> 67 1600
> http://www.PictureTrail.com/bauman311
>
> > Ditto what Mike said. When I removed the stock vents from the float
bowl
> to
> > the air cleaner on my 70 1600, I did the same thing. Ran fuel hose down
> > away from the header to the suspension, but I ended mine a little
shorter
> > than Mike. I stopped mine just below the upper a-arms. Either way, it
> > works and solved a problem I was having with leaning of the fuel mixture
> at
> > higher rpm's under load.
> >
> > Matt
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