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Author Topic:   Holley Nozzle types..?
Ryan Wilke
Gearhead

Posts: 607
From: Stanton, Michigan
Registered: Oct 2000

posted 03-15-2001 08:27 AM     Click Here to See the Profile for Ryan Wilke   Click Here to Email Ryan Wilke     Edit/Delete Message   Reply w/Quote
It's been recommended that I install larger discharge nozzles (.037"/.031") in the 650DP (stock 0.028") on my 306"/4speed racecar. However, I'm not sure which nozzle TYPE to get... the straight or tube type? Any thoughts or opinions, guys?
Thanks, Ryan

------------------
The '3-Pedal Attitude' Kid
in a '69 FB w/ 306 now, but
the 460+ is coming... :D

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Moneymaker
Administrator

Posts: 11493
From: Lyons, IL, USA
Registered: May 99

posted 03-15-2001 10:54 AM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
I like the tube type myself Ryan. Holley tests have shown no appreciable difference between the two.

------------------
Alex Denysenko Co-Administrator and Moderator NHRA/IHRA/SRA member
Fleet of FoMoCo products
Moneymaker Bio
US Class Nationals link

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Ryan Wilke
Gearhead

Posts: 607
From: Stanton, Michigan
Registered: Oct 2000

posted 03-15-2001 11:16 AM     Click Here to See the Profile for Ryan Wilke   Click Here to Email Ryan Wilke     Edit/Delete Message   Reply w/Quote
Thanks for your guidance and quick reply, Alex! Ryan

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Dave_C
Gearhead

Posts: 432
From: Gadsden, Al
Registered: Aug 99

posted 03-15-2001 11:17 AM     Click Here to See the Profile for Dave_C   Click Here to Email Dave_C     Edit/Delete Message   Reply w/Quote
I like the tube type also.

One other thing. Going up to a 37 you will be ok, but if you ever go above that you need to get a hollow squirter screw.

37 an below the restriction in the squirter is the squirter size itself. Once you go above that the passage around the screw that the gas goes though can restrict it. They sell a hollow screw to solve this problem.

Works well. I have them on booth ends of 750 dp with 41 tube type squirters.

Later,

David Cole

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Ryan Wilke
Gearhead

Posts: 607
From: Stanton, Michigan
Registered: Oct 2000

posted 03-15-2001 11:35 AM     Click Here to See the Profile for Ryan Wilke   Click Here to Email Ryan Wilke     Edit/Delete Message   Reply w/Quote
Thanks for the hollow screw info, David. I'm making a note to my file.

Will the step up in squirter size cause me to want to step down any in jet size?
What'cha tink?

Ryan

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Moneymaker
Administrator

Posts: 11493
From: Lyons, IL, USA
Registered: May 99

posted 03-15-2001 12:58 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
Sorry Ryan, I assumed that everyone knew of the hollow discharge nozzel screws. the nozzels have zero effect on the jet selection. The nozzels do nothing after initial WOT.

------------------
Alex Denysenko Co-Administrator and Moderator NHRA/IHRA/SRA member
Fleet of FoMoCo products
Moneymaker Bio
US Class Nationals link

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