Barry Grant Fuel Injection?

[David & Cheryl Haggard]

> But then why are there gas stains (like little rivers) on
> some manifolds
> plenum floor?.   Usually not apparent on heated manifolds.
> Bruce

   In recent reading in Car Craft, an article was talking about plenum
designs in manifolds. That article said that the main benefit of a
spacer under a carb (or a TBI unit) is that it gave the air/fuel more
time to turn or atomize before it hit the plenum floor. Seemed to say
that **in many applications** this was more important than the
increased plenum volume that a spacer creates.
   So the answer to your (rhetorical?) question is that in some
manifolds, the air/fuel slams into the plenum floor, and in others it
doesn't. Gas stains on the plenum floor might indicate a need for
spacers.
   Heated manifolds vaporize the fuel before it can run off like a
little river, I suppose.
   Just another theory to throw out...

Dave

----------------------------------------------------------------------------
To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org