The fuel pump has nothing to do with low float level unless you put in a
higher/lower pressure fuel pump. But I will tell you fuel level is extremely
important for correct running. Make sure your floats are good and set
correctly. It would change your mixture.
How's your timing?
Mike
----- Original Message -----
From: "Dan Neff" <neffster189@adelphia.net>
To: "Roadster Listgroup" <datsun-roadsters@autox.team.net>
Sent: Tuesday, April 09, 2002 3:33 PM
Subject: Vaporlocking, part 2
> I said:
> > > Well my main idle set screw is in a drawer. I only use the individual
> > > carb set screws.
>
> Paul wrote:
> > Teddy, see, I'm not the only one with spare parts!
>
> Well, that's an unneeded part anyway. Just adds weight to the car :)
>
> > > Now THAT's what I'm talkin' about! But don't 1600's tend to run a
> > > bit cooler?
> >
> > Thanks Dan. I have always thought that 1600's were cooler! (:-)
>
> Now wait a minute, that's NOT what I meant! :)
>
> > > I'll keep y'all posted -- so Paul and Teddy knows who's buying
> > > the hot cakes!
> >
> > Thanks. But I still think it might be the return line or the pump.
How
> > does it run at red line?
>
> Very nice, thankyouverymuch :) . It rocks between 2500 and 6500 rpm. I
> rarely redline, altho from 6000 up, there's MORE power coming on -- it's
> certainly not flattening out! When it's 'vaporlocking', it splutters and
> farts at a variety (ie: random) of rpm's until it clears.
>
> > Plenty of fuel?
>
> Sure looks that way... unless I have the floats to low?
>
> > I remember a 307 Chevy V8 (My son's '73 Nova) that appeared to have
vapor
> > lock. Turned out it was the wrong fuel pump and the lever didn't make
> > full contact with the cam so at low RPMs it didn't pump enough fuel.
> > Once the revs got up a bit, everything seemed okay.
>
> Well, I don't *think* so, altho I don't remember where I got that fuel
> pump. But I was also having the same problem before that pump (and carbs,
> and valve job, and EI dizzie, and...).
>
> It's a beautiful 68 degree day out, so dropped the top and took the
> scenic route on my lunch break. Got back, left it idling (it's *thinking*
> about spluttering, but not there yet) and pulled the return hose at the
> firewall (pipe). Wow, NICE fuel flow! It took most of my thumb pressure to
> stopper it. Gas is cool too. Go figure!
> Well, next I'll check the return line from the fire wall to the tank,
> and make sure it's not plugged there.
>
> Wondering about the floats though. Could they be some minimal adjustment
> too low (ex: 1mm) - such that 90% of the time it's sufficient, but when
the
> gas starts to boil in the bowls, it leans out the carbs, even though the
> rest of the system (pump/lines/return) is flowing nice and cool?
>
> thanks,
> dan neff '69 2000
> colorado springs, co
> http://www.wycroc.org
>
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