[DeTomaso] Carb and fuel pump

[dave londry]

Quicker to get the A/F meter in and watch it happen.
Any of the "too little fuel" causes will show high A/F numbers PDQ.
I would have expected you to get the dryout symptoms including big 
detonation.

All that would make one think you'd run out of flow,
  but a stock Pantera with the crappy little carb has plenty of jump at 130.

Seems like a quality mystery to me.
dave

On 08/12/2013 3:05 PM, Will Kooiman wrote:
> Or the stock fuel line/sock.
>
> On Dec 8, 2013, at 3:35 PM, Asa Jay Laughton <asajay at asajay.com 
> <mailto: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 <javascript:openWindow(1);>, quench 
>> <javascript:openWindow(2);> chamber.
>> Cam is a Crane hydraulic roller with these specs
>> <Mail Attachment.png>
>> 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.teampanteraracing.com
>> http://facebook.com/racingagainstautism
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