[TPR] Carb and fuel pump

[Charles Engles]

Dear Bud,

 

 

                    Boy, I hate it when someone throw real world experience
and evidence in the middle of a theoretical discussion!  Nicely done.

 

                   From your experience, I think we can eliminate the 600
cfm Holley as the culprit and consider the other potential causes.

 

 

                                           Warmest regards, Chuck Engles

 

 

 

From: TPR [mailto:tpr-bounces at teampanteraracing.com] On Behalf Of B Hower
Sent: Sunday, December 08, 2013 1:40 PM
To: michael at michaelshortt.com; Asa Jay Laughton
Cc: TPR List
Subject: Re: [TPR] Carb and fuel pump

 

FWIW -- I have had a gps reading of 147 mph with a 600 cmf Holley and stock
style aftermarket fuel pump. Engine was running iron 4V heads, .030 over
bore. Isky hyd cam.

 

 

Bud #3400 ( Drive it like there is no tomorrow -- for there may not be ! )

 

On Sunday, December 8, 2013 1:27 PM, "michael at michaelshortt.com"
<michael at michaelshortt.com> wrote:

Asa,

How restrictive is your air intake apparatus?  If too restrictive,  that can
have dramatic effect, imagine an asthmatic running a marathon.

Michael

On Dec 8, 2013 2:17 PM, "Asa Jay Laughton" <asajay at asajay.com> wrote:

Hi all,

This year (2013) at the Silver State Classic Challenge, I recorded a top
speed in the trap of 130.7 MPH.  When I reached the countdown to the trap I
was already doing just shy of that to bank time before the Narrows.  I
consciously pressed the accelerator a bit more to push her up to a goal 135
MPH, but nothing happened.

I speculate at 130 MPH, I'm using up all the carb, or all the fuel pump.
One, the other, or both.

The Carb is a Ford stamped Holley list with these numbers:

D8PE-9510-KA
LIST 8414
3113

This link shows my email back in 1999 with info from Holley that I obtained.
http://poca.com/detomaso/1999-09/329.html
Apparently it's a 600 cfm.  it has vacuum secondaries and three-quarter turn
emission lockouts on the mixture screws.  I've put a standard rebuilt kit
through it once or twice.  It's been a really good carb, but I don't know it
will pull more than 130 MPH.

What to do.
As always, money is a bit of an issue.  I'd like to install EFI but that's
really expensive.
I'd like to keep it responsive at low rpm like she is now, but still have
the throughput needed at higher rpm at top speeds.  I think this leans me
toward a vacuum secondary rather than mechanical.  I'm sure the cfm needs to
be cranked up, but would 650 do it or should I head for 700 or higher?

Does anyone have one they'd be willing to part with?
Should I send mine into someone like Chuck Nuytten and have them do their
magic on it, replacing metering blocks and other mods?
Should I just buy a new one?

The engine is a 351C bored .030 over, stock stroke.
Heads are DOAE, quench chamber.
Cam is a Crane hydraulic roller with these specs

Intake is an FPP 4145
Stock ZF transmission

I've got some time so I'm looking for some informed/experienced opinions on
what carb would be best.

And since Professor Engles from the Midwest Division of the Pantera Research
Institute is engaged with Fuel pump questions, I'll just follow his thread
on that part. :)

Thanks,
Asa Jay



-- 
Asa Jay Laughton, MSgt, USAFR, Retired
& Shelley Marie
Spokane, WA
******************************     
http://www.racingagainstautism.com <http://www.racingagainstautism.com/> 
http://www.teampanteraracing.com <http://www.teampanteraracing.com/> 
http://facebook.com/racingagainstautism
-- 
Asa Jay Laughton, MSgt, USAFR, Retired
& Shelley Marie
Spokane, WA
******************************     
http://www.racingagainstautism.com <http://www.racingagainstautism.com/> 
http://www.teampanteraracing.com <http://www.teampanteraracing.com/> 
http://facebook.com/racingagainstautism


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