[TPR] More follow up from Chuck Nyutten

Tue Jan 7 10:46:50 PST 2014

Are you talkin' to me?  I am Dirty and Grouchy - don't forget it.

Here are my impressions of the carb situation, with all due respect:

Nuytten thinks Asa is asking for a top end racing carb and still wants his 22mpg (can't blame him for that).    Can this be done? maybe.  I would say (in a perfect sponsored world) get a cab that will perform and deliver top end - then, if not satisfied get a carb for around town use.

Nuytten also says "A vacuum carburetor is a good choice if you only want fuel economy but you are not going to be happy with that carburetor when you want to go racing. "
My experience is this: the truck has an expensive designer carb - never worked for beans without a lot of love; V8 Miata - summit carb w/ four corner idle and replaceable air bleeds, it ran great at sea level and needed a lot of love up here (6600'); Pantera has a vacuum secondary 750 - runs a little fluffy up here and great at the ORR/track days I have attended.  So, vacuum no good?  I would say this is wrong.

My $.02 worth, fwiw.

Have fun, stay warm.

G & D LLC

  ----- Original Message ----- 
  From: Mad Dog Antenucci 
  To: Asa Jay Laughton ; tpr at teampanteraracing.com 
  Sent: Tuesday, January 07, 2014 8:31 AM
  Subject: Re: [TPR] More follow up from Chuck Nyutten

  Bud can do 130?
  At Silver State? ;-)

  Look I can do 185 at sealevel and Bud is somewhere south of sealevel! HAHA
  Here's the guys to ask....what is JB running for a carburation...he has had several runs between 130-135 AVERAGE which meant he was hitting 150-160 in straights....

  Note to Grumpy:  Chime in here with your wisdom ;-)

  On Monday, January 6, 2014 10:05 PM, Asa Jay Laughton <asajay at asajay.com> wrote:

  Hi gang,

  As I continue my edumacation bout cars and stuff.... I wrote Chuck again asking about the option of a vacuum secondary carb instead of a double-pumper as he originally recommended.  He was candid in his response and I take it with the same grain of salt I try most things with.  You can read the trail below.

  I also talked with our friend Bud Hower, who sent photos and specs of his carb.  His Holley is nearly identical to mine, though it may not be an "emissions" model, and he gets 130 top end without a problem and maybe more.  That may simply mean mine being an emissions carb might be channeled and jet differently... for fuel economy and not top end.

  Note, I'm not spending any more yet, I'm still investigating.
  Asa Jay

  -------- Original Message -------- Date:  Mon, 6 Jan 2014 14:45:10 -0600 
        From:  <form at chucknuytten.com> 
        To:  'Asa Jay Laughton' <asajay at asajay.com> 

  If you are going to buy a new carburetor, I would not recommend a vacuum secondary carburetor. I use double pumper carburetors on many vehicles that claim they use them on performance street vehicles. I stay with my original recommendation of a 750-2003 carburetor $833.00. 
  Vacuum carburetors tend to drop back on performance on the top end and that is exactly the condition you are describing. A vacuum carburetor is a good choice if you only want fuel economy but you are not going to be happy with that carburetor when you want to go racing. 

  From: Asa Jay Laughton [mailto:asajay at asajay.com] 
  Sent: Friday, December 27, 2013 1:33 PM
  To: form at chucknuytten.com
  Subject: Re: Friend or Fellow Racer

  Thank you for the recommendation.  Based on the fact I don't race the car all the time and in fact drive it more as an around-town car until open road race season, I would think a vacuum secondary would be better for fuel economy.  Presently I get nearly 22 MPG on the highway, which is nice; when racing, it doesn't really matter as long as enough fuel is being metered to the engine.  However, during the SSCC this year I felt the carb was leaning out and perhaps even starving the engine at high rpm, which is why I'm investigating a new carb.

  Do you work with vacuum secondary carbs and what is your opinion of them?
  Thank you,
  Asa Jay

Asa Jay Laughton, MSgt, USAFR, Retired& Shelley MarieSpokane, WA******************************     http://www.racingagainstautism.comhttp://www.teampanteraracing.comhttp://facebook.com/racingagainstautism
  On 12/9/2013 8:51 AM, form at chucknuytten.com wrote: 
    If you want performance, I have a  750-2003 double pump carburetor, four corner idle which would work very well for your situation. $833.00 I looked up the carburetor you presently are running and according to the Holley info I would not recommend putting any more money into that core.  Your present carburetor is an ok core for general use but not the best core for performance.

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