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The VIPER Garage  |  How To Instructions  |  Viper Parts, numbers, bulbs, specs and info  |  Various Throttle Bodies Tested and Flow Numbers
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Author Topic: Various Throttle Bodies Tested and Flow Numbers  (Read 254 times)
RTTTTed
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Viper Nation - ezine
« on: January 02, 2018, 02:04:44 AM »

I currently have 3 ongoing Vipers.  2001 Roe supercharged GTS.  ported heads and a 720whp build using dual 70mm Accufab racing TBs.  2. 1999 TT Viper GTS with 1500whp stock Gen 2 modified intake and dual 70mm Accufab TBs.  3.  1998 TT 1000whp built engine using stock Gen 2 intake and dual 70mm Accufab racing TBs.  According to various ratings my airflow rating should be about 1400cfm.  Thinking of upgrading the 1000whp TT with sheet metal intake and Oval blade Accufab TB (1696dfm).  Would like the 1800 cfm oval TB for the big power TT Viper though.


I copied this info from Accufab website to help people (and me) choose Throttle bodies for their builds; 


CFM Air Flow
ALL INFORMATION PROVIDED TO BE USED AS REFERENCE ONLY.  THE PARTS USED IN TESTING ARE UNMODIFIED ITEMS UNLESS OTHERWISE SPECIFIED.  THE DATA HAS BEEN COLLECTED OVER SEVERAL YEARS OF TESTING.  ALL CFM ROUNDED TO THE NEAREST WHOLE NUMBER.

What is CFM? The air flowing through a product is measured in Cubic Feet per Minute, CFM.  It's important to flow test a performance throttle body and find the CFM rating.  A 75mm Brand A throttle body, may not equal the performance of a 75mm Accufab throttle body.

This airflow analysis is important because, basically, an engine is an air pump.  Based on the size of the engine and how fast it will be spinning, it will pump out a certain amount of air. Of course, there are many variables to CFM requirements, such as cylinder head flow capabilities, intake and exhaust manifold flow capabilities, etc... but the basic engine block will pump a certain amount of air over a specified period of time, measured in CFM.  An Accufab throttle body is designed to outflow the stock throttle body, hence, providing more air to the engine for it to utilize accordingly.

PRODUCTS TESTED:

All CFM ratings shown @ 28”:
 
Buick GN, 1986-1987
65mm – 649 cfm
70mm – 711 cfm
 
Dodge Viper
RT-10, Gen 1, 1992-1996 – 65mm – 611 cfm each
GTS Gen 2, 1996-2002 – 70mm - 697 cfm each
 
Chevy LS-1, 1998-1999 and up (with mechanical linkage)
Stock – 798cfm
75mm – 920cfm
90mm – 1369cfm
 
Ford Mustang 5.0L, 1986-1993
Stock – 495cfm
65mm – 664cfm
70mm – 787cfm
70mm (Race) – 896cfm
75mm – 924cfm
75mm (Race) – 1045cfm
80mm – 1142cfm
85mm – 1322cfm
90mm – 1369cfm
105mm – 1550cfm

Ford Mustang 4.6L, 1996-2004
70mm – 628cfm
75mm – 632cfm
Stock throttle body and plenum – 498cfm
70mm and Accufab plenum – 680cfm
75mm and Accufab plenum – 686cfm
 
Ford Mustang 5.0L, 2011-2012
84.5mm – 1183cfm
 
Ford Mustang Cobra, 1996-1998
and Mustang Bullitt, 2001
Stock – 1089cfm
Elliptical Mono Blade – 1284cfm
Oval Mono Blade – 1696cfm
 
Ford Mustang Cobra, 1999-2001
and Mustang Mach 1, 2003-2004
Dual 60mm – 1147cfm
 
Ford Mustang Cobra, 2003-2004
and Ford Lightning Pick-up, 1999-2004
Oval Mono Blade – 1696cfm
 
Ford GT, 2005-2006
Stock – 1590cfm
Dual 75mm – 1807cfm
Oval Mono Blade – 2090cfm
Accufab 4-Barrel Throttle Body
4150 style - 1215cfm
4500 style – 2128cfm
8500 style – 3600cfm
 
Mountain Motor “split Dominator style”
Dual 2.75-inches – 1849cfm (per unit)
 
Logged
1999 1200rwhp TT GTS - ART, 2001 Roe sc GTS- (4 sale), 440 Duster restomod (sold), 3x Stealth TTs, 92 Daytona IROC with T3, 580whp/1080wtq Cummins pickup.
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