[DeTomaso] Solution for fuel sloshing out of rear float bowl

Will Kooiman will.kooiman at gmail.com
Mon Jun 25 17:08:03 EDT 2012


I bought a 2" plastic carburetor spacer and I sanded it until it was flat - testing it on the engine several times with a level.

That's the redneck method, but it works.

A permanent method is to have the intake manifold milled flat.  The cant is built into the intake.  A machine shop can make it perfectly level on a mill.  If I were doing it over, that's what I would do.  When I did the spacer, I wasn't sure it would solve my problem.  After I confirmed that it did, I was going to mill the intake - but I switched to Webers instead (which do not have a cant).

I did not have to redrill the carburetor mounting studs.  I kept the same cant for the studs.  The carburetor base plate isn't precision drilled.  There is enough tolerance to accept the stud at an angle.  I used flat washers for piece of mind.  If you don't, the nuts dig into the base plate - a little.

On Jun 25, 2012, at 3:48 PM, <klckmac at msn.com> wrote:

> Will, I have a stock 351C intake, original carb. How did you level your carb, intake wo
>  
> > From: will.kooiman at gmail.com
> > Date: Mon, 25 Jun 2012 15:15:51 -0500
> > To: 
> > CC: kenn_green at yahoo.com; detomaso at realbig.com
> > Subject: Re: [DeTomaso] Solution for fuel sloshing out of rear float bowl
> > 
> > I leveled the carburetor first (Holley).
> > 
> > Then I set the bowls by-the-book.
> > 
> > Then I lowered both front and rear 1/4 turn until the problem stopped.
> > 
> > With a level carb, I think I turned it 1/2 turn. It has been a while. I don't remember exactly.
> > 
> > With an unlevel carb, I turned it a LOT and it still sometimes stalled under heavy braking.
> > 
> > On Jun 25, 2012, at 2:54 PM, <hoppe1 at cox.net> <hoppe1 at cox.net> wrote:
> > 
> > > Any idea on how much you lower the bowls?
> > > I turned mine down 1/2 turn on front and rear bowls.
> > > Rich
> > > ---- Will Kooiman <will.kooiman at gmail.com> wrote: 
> > >> Yes, but...
> > >> 
> > >> fuel sloshes out of the boosters under heavy deceleration, not the vent tubes.
> > >> 
> > >> The simple fix is to lower the fuel level in the fuel bowls.
> > >> 
> > >> The preferred fix is to switch to Webers. ;-)
> > >> 
> > >> On Jun 25, 2012, at 1:37 PM, Ken Green wrote:
> > >> 
> > >>> Rick Stoner (owns Westech Dyno) came up with this to prevent fires when a car rolls:
> > >>> 
> > >>> http://www.accufabracing.com/index.php?option=com_redshop&view=product&pid=113&cid=3&Itemid=7
> > >>> 
> > >>> It also should stop fuel sloshing out of the rear float bowl under heavy deceleration.
> > >>> 
> > >>> Ken
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