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Discussion Starter #1

Pat Musi


Joe Lepone Jr.


Todd Hoerner


Ricky Smith

They're all running Accufab's "Mountain Motor" EFI Throttle Bodies.




These are the standard 2.75-inch bore units and are available with or without the optional upper fuel rails. Accufab also offers these units in 2.50-inch bores, 3.00-inch bores and 3.50-inch bores, with or without the upper injector system.

Call Sonny's Racing, Pat Musi Performance or Accufab for more info.
 

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That's some sexy hardware.
 

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got the mountain throttle bodies with the upper injection and 16 injectors but screwed without the tweeking from Hoerner. We did set the comp national record a couple weeks ago.
 

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Discussion Starter #10
Whats the cfm of just one of those things?
Each standard (2.75-inch bore) 2-brl unit flows 1849 cfm @ 28-inches. A set of four is good for 7,396 cfm. The smaller ones (2 1/2-inch bores) flow 1328 cfm per unit.

The big units (3.0-inch and 3 1/2-inch) flow 2284 cfm and 2738 cfm per unit respectively.
 

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Discussion Starter #12
There are more than one way to mount these 2-brl throttle bodies.


Sonny used them on a big inch street car engine, ginned up his own "progressive linkage". Just like the old days with four 2-brl Stomberg 97's ("4 duces"), only bigger. Of course, one of Sonny's 904-inch engines needs more air than a 239-inch flathead.
 

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How could you set these up on a N/A SBF with a stick?
 

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Discussion Starter #15
Here's another way to go. You can use a Dominator style 4500 carb and get 1050-1100 cfm...



...or, you can install an Accufab 8500 throttle body and get 3698 cfm.



The Holley Dominator 4500 weighs in at 13 1/2 pounds and measures 12 1/2" long x 7 3/4" wide x 3 3/4" tall. The Accufab 8500 weighs 3 1/2 pounds and measures 7" x 7" x 3" tall. The 8500 is basically dual 2-brl units merged together (same 2.75-inch throttle bores). And the linkage is included. The 5/8" thick adapter shown in the photo allows the Accufab 8500 to be mounted on any 4500 style intake manifold. Slight loss of cfm with the adapter.
 

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Discussion Starter #16
What are the pros and cons of running the injectors in the throttle bodies?
An on-going debate. I'm not sure which is better. Sonny swears by injectors on the top and in the runner, Musi says it does not matter. Personally, I lean toward having the upper injectors if for no other reason than to cool the air in the plenum of the intake manifold.
 

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Discussion Starter #19

I meant to post this photo earlier. This is the car that Joe Lepone Jr. is running now, and not his Camaro (I couldn't find a photo of the Mopar). Same huge Sonny's/Musi powerplant, same Accufab throttle bodies. I hung out with Joe this past weekend at the NMCA West event at Famoso.
 

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I meant to post this photo earlier. This is the car that Joe Lepone Jr. is running now, and not his Camaro (I couldn't find a photo of the Mopar). Same huge Sonny's/Musi powerplant, same Accufab throttle bodies. I hung out with Joe this past weekend at the NMCA West event at Famoso.
I bet that was the highlight of your weekend. huh?? ROFLOL.

I was gonna say something about the picture of the Camaro, but its not that big a deal.

Bob
 
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