Yeah good thought...
I am supposed to be getting a complete new fuel system here in the next few
weeks... Seems BG liked the stickers and the Car and are going to do a
Sponsor upgrade for Muroc.... to include that Silly Yellow Bottle..... We
are going to snatch the motor and freshen a couple of things.... and
upgrade the Head Gaskets to accept the extra Pressures of Nitrous... then
we will take it back over to the Dyno and see what we have.... should be
interesting to see what happens to the Basic Hp before the Nitrous....
Now to see if that really happens or if I go back to working out the bugs
of this system..... One of my questions right now is..... is it normal for
the EGT to progressively Rise with an increase in RPM..... it's makes sense
to me that it would but... Who know's.... a correctly managed fuel system
should be the same EGT all the way up shouldn't it?
Keith
----------
> From: Thomas E. Bryant <saltracer@awwwsome.com>
> To: Keith Turk <kturk@ala.net>
> Cc: Bill Bennett <benettw@earthlink.net>; land-speed@autox.team.net
> Subject: Re: Fw: Carb sizing/ ignition timing
> Date: Monday, May 15, 2000 10:01 AM
>
> Keith,
> It seems that six pounds should be sufficient. Do you have access to a
> fuel level sight gauge that would let you monitor the level under load?
> If the level drops, you have a problem. I have seen situations where the
> needle valve itself restricted flow.
>
> Tom, Redding CA - #216 D/CC
>
>
>
> Keith Turk wrote:
> >
> > Now there was a thought we can Play with....
> >
> > The motor basically just kept getting hotter as the RPM increased.... I
was
> > wondering if I had enough Fuel Flow .... the Pressure was set on 7.5
but we
> > noticed as the demand increased off Idle it went down to 6 and seemed
to
> > stay there.... hard to tell as I was in the car and I don't have a
Pressure
> > gage in the car...( brad was peeking over the edge of the engine
> > compartment)
> >
> > I am running a Barry Grant 280 which is good to about 650hp... which is
> > just under what we are making at the crank.. on this motor...
> >
> > K
> >
> > ----------
> > > From: Thomas E. Bryant <saltracer@awwwsome.com>
> > > To: Bill Bennett <benettw@earthlink.net>
> > > Cc: land-speed@autox.team.net
> > > Subject: Re: Fw: Carb sizing/ ignition timing
> > > Date: Monday, May 15, 2000 9:32 AM
> > >
> > > Bill,
> > > I don't know what carburetor you have, but I assume it is a Holley.
The
> > > Holley power valve is vacuum operated and changing power valves only
> > > results in altering the level of vacuum that opens it, the actual
> > > metering is done by restrictions in the metering block. What timing
> > > settings have you tried? You could do away with the power valve and
run
> > > main jets only, but of course this would make it rich in the mid
range
> > > when you got it right on the top. Another thought, make sure that you
> > > have adequate fuel supply, there may be something the is restricting
> > > fuel flow which would make it lean out under high demand.
> > >
> > > All of this 'great' advice comes from someone who hasn't run
carburetors
> > > on a race motor since I had six Stromberg "97" on a 300 cu in Desoto
> > > back in the very early sixties. I do know though that problems like
this
> > > often have a simple fix. Back to the Basics!
> > >
> > > I am still a believer in throwing out what others do and finding what
> > > works for me. Combinations are the key. Some run leaner with less
timing
> > > and others may try more fuel and more timing. Although I have not
often
> > > had the opportunity to do it, the dyno is a great place to
experiment.
> > >
> > > Tom, Redding CA - #216 D/CC
> > > Bill Bennett wrote:
> > > >
> > > > ----- Original Message -----
> > > > From: "Bill Bennett" <benettw@earthlink.net>
> > > > To: "Thomas E. Bryant" <saltracer@awwwsome.com>
> > > > Sent: Sunday, May 14, 2000 10:55 PM
> > > > Subject: Re: Carb sizing/ ignition timing
> > > >
> > > > > Strange as he would say this. I have seen so many jet changes
done
> > > > on
> > > > > this motor going bigger each time till it slowed down. The motor
> > > > seems
> > > > > to always want more gas. I wonder does the power valve have
anything
> > > > > to do with it. I know they made a couple of different types some
> > > > > flowed more than others. On the street motors I have built I had
> > > > > always just measured the vacuum at idle and sized the power
valves 2
> > > > > inches less. I never worried about the flow rate. Don't know
about
> > > > > race motors.
> > > > > BillB
> > > > >
> > > > > ----- Original Message -----
> > > > > From: "Thomas E. Bryant" <saltracer@awwwsome.com>
> > > > > To: "Keith Turk" <kturk@ala.net>
> > > > > Cc: <land-speed@autox.team.net>
> > > > > Sent: Sunday, May 14, 2000 10:20 PM
> > > > > Subject: Re: Carb sizing/ ignition timing
> > > > >
> > > > >
> > > > > > Keith,
> > > > > > Sounds to me like it is lean in then power range. At light to
mid
> > > > > range
> > > > > > cruise the main circuit supplies the fuel, when you lean on it
the
> > > > > power
> > > > > > circuit has to provide extra fuel.
> > > > > >
> > > > > > Tom, Redding CA - #216 D/CC
> > > > > > Keith Turk wrote:
> > > > > > >
> > > > > > > Saw something interesting the other day on the dyno thought I
> > > > > would ask
> > > > > > > about it...
> > > > > > >
> > > > > > > with the Engine at 3000 rpm the egt was around 1200.... as I
> > > > > rolled into the
> > > > > > > throttle and the Rpm started Rising so to did the EGT ...
> > > > actually
> > > > > getting
> > > > > > > to an unacceptable range based on my EGT gage and the motors
I
> > > > > have run with
> > > > > > > this set up.... I want to see about 1375 and it was well over
> > > > > 1500..
> > > > > > >
> > > > > > > So my Question is if the Carb was to big how would that
manifest
> > > > > itself...
> > > > > > > and if the ignition timing was to far advanced what would I
> > > > > see.... any
> > > > > > > thoughts?
> > > > > > >
> > > > > > > Keith ( Nahh I ain't totally clueless... Just Bored ) ( Hey
> > > > Mom..
> > > > > Happy
> > > > > > > Mothers day)
> > > > > >
> > > > >
> > > > >
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