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ALL TESTING PERFORMED AT:
WESTECH PERFORMANCE GROUP, INC. 11098 VENTURE DR., UNIT C MIRA LOMA, CA 91752 951-685-4767
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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: PFORD 1986 - 1993 MUSTANG 5.0L STOCK 58MM - test results not available STOCK 60MM - test results not available
ACCUFAB 65MM TESTED @ 5" - 280 CFM CORR @ 20" - 560 CFM CORR @ 25" - 627 CFM CORR @ 28" - 664 CFM
ACCUFAB 70MM TESTED @ 5" - 332 CFM CORR @ 20" - 664 CFM CORR @ 25" - 744 CFM CORR @ 28" - 787 CFM
ACCUFAB 75MM TESTED @ 5" - 390 CFM CORR @ 20" - 780 CFM CORR @ 25" - 874 CFM CORR @ 28" - 924 CFM
Race Throttle body measures 65, 70, 75, 80, 85mm size at the blade and 90mm at the inlet. ACCUFAB 65MM RACE - test results not available
ACCUFAB 70MM RACE TESTED @ 5" - 378 CFM CORR @ 20" - 756 CFM CORR @ 25" - 847 CFM CORR @ 28" - 896 CFM
ACCUFAB 75MM RACE TESTED @ 5" - 441 CFM CORR @ 20" - 882 CFM CORR @ 25" - 988 CFM CORR @ 28" - 1045 CFM
ACCUFAB 80MM RACE TESTED @ 5" - 482 CFM CORR @ 20" - 964 CFM CORR @ 25" - 1080 CFM CORR @ 28" - 1142 CFM
ACCUFAB 85MM RACE TESTED @ 5" - 558 CFM CORR @ 20" - 1116 CFM CORR @ 25" - 1250 CFM CORR @ 28" - 1322 CFM
ACCUFAB 90MM RACE TESTED @ 3" - 449 CFM CORR @ 20" - 1158 CFM CORR @ 25" - 1297 CFM CORR @ 28" - 1369 CFM
ACCUFAB 105MM RACE NEW PRODUCT TESTED @ 5" - 635 CORR @ 20" - 1270 CORR @ 25" - 1422 CORR @ 28" - 1504
FORD 1994-1998 V6 MUSTANG STOCK 50MM TESTED @ 7" - 179 CFM CORR @ 20" - CORR @ 25" - 338 CFM CORR @ 28" - 358 CFM
STOCK 60MM - test results not available
FORD 1996 - 2004 4.6L 2V STOCK 65MM TESTED @ 5" - 248 CFM CORR @ 20" - 496 CFM CORR @ 25" - 556 CFM CORR @ 28" - 588 CFM
ACCUFAB 70MM TESTED @ 5" - 299 CFM CORR @ 20" - 598 CFM CORR @ 25" - 670 CFM CORR @ 28" - 708 CFM
ACCUFAB 75MM - test results not available
1996 - 2004 4.6L 2V THROTTLE BODY & PLENUM FLOW RESULTS |
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| 5" | 20" | 25" | 28" | ||||||||||||||
| STOCK PLENUM 1998 - 2001 ONLY | 210 | 420 | 470 | 498 | |||||||||||||
| w/ 65mm Stock T/body | 186 | 372 | 417 | 441 | |||||||||||||
| w/ 70mm Accufab T/body | 207 | 414 | 464 | 491 | |||||||||||||
| w/ 75mm Accufab T/body | 206 | 412 | 461 | 488 | |||||||||||||
| STOCK PLENUM 2001 & UP ONLY | 213 | 426 | 477 | 505 | |||||||||||||
| w/ 65mm Stock T/body | 194 | 388 | 435 | 460 | |||||||||||||
| w/ 70mm Accufab T/body | 206 | 412 | 461 | 488 | |||||||||||||
| w/ 75mm Accufab T/body | 207 | 414 | 464 | 491 | |||||||||||||
| TRICK FLOW PLENUM ONLY | 260 | 520 | 582 | 616 | |||||||||||||
| w/ 65mm Stock T/body | 218 | 436 | 488 | 517 | |||||||||||||
| w/ 70mm Accufab T/body | 251 | 502 | 562 | 595 | |||||||||||||
| w/ 75mm Accufab T/body | 250 | 500 | 560 | 593 | |||||||||||||
| C&L PLENUM ONLY | 240 | 480 | 538 | 569 | |||||||||||||
| w/ 65mm Stock T/body | 204 | 408 | 457 | 483 | |||||||||||||
| w/ 70mm Accufab T/body | 235 | 470 | 526 | 557 | |||||||||||||
| w/ 75mm Accufab T/body | 252 | 504 | 564 | 597 | |||||||||||||
| DRAGON PLENUM ONLY | 280 | 560 | 627 | 664 | |||||||||||||
| w/ 65mm Stock T/body | 226 | 452 | 506 | 536 | |||||||||||||
| w/ 70mm Accufab T/body | 258 | 516 | 578 | 611 | |||||||||||||
| w/ 75mm Accufab T/body | 261 | 522 | 585 | 619 | |||||||||||||
| ACCUFAB PLENUM ONLY | 287 | 574 | 643 | 680 | |||||||||||||
| w/ 65mm Stock T/body | 235 | 470 | 526 | 557 | |||||||||||||
| w/ 70mm Accufab T/body | 265 | 530 | 594 | 628 | |||||||||||||
| w/ 75mm Accufab T/body | 265 | 530 | 594 | 628 | |||||||||||||
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FORD 1996 - 2004 4.6L 4V STOCK 57MM TWIN COBRA & LIGHTNING/HARLEY TESTED @ 3" - 357 CFM CORR @ 20" - 921 CFM CORR @ 25" - 1032 CFM CORR @ 28" - 1089 CFM
MOTORSPORT COBRA OVAL TESTED @ 3" - 450 CFM CORR @ 20" - 1161 CFM CORR @ 25" - 1301 CFM CORR @ 28" - 1373 CFM
BBK 62MM COBRA TWIN TESTED @ 3" - 420 CFM CORR @ 20" - 1083 CFM CORR @ 25" - 1213 CFM CORR @ 28" - 1280 CFM
BBK 65MM COBRA TWIN TESTED @ 3" - 439 CFM CORR @ 20" - 1133 CFM CORR @ 25" - 1269 CFM CORR @ 28" - 1339 CFM
ACCUFAB OVAL LIGHTNING TESTED @ 3" - 556 CFM CORR @ 20" - 1434 CFM CORR @ 25" - 1606 CFM CORR @ 28" - 1696 CFM
ACCUFAB OVAL LIGHTNING (THROUGH STOCK 2001 HOSE) TESTED @ 3" - 399 CFM CORR @ 20" - 1029 CFM CORR @ 25" - 1153 CFM CORR @ 28" - 1217 CFM
ACCUFAB 1996 - 1998 COBRA ELLIPSE TESTED @ 3" - 421 CFM CORR @ 20" - 1086 CFM CORR @ 25" - 1217 CFM CORR @ 28" - 1284 CFM
ACCUFAB 1999-2001 COBRA & ACCUFAB 2003-2004 MACH 1 TESTED @ 5" - 495 CFM CORR @ 20" - 990 CFM CORR @ 25" - 1109 CFM CORR @ 28" - 1173 CFM
FOCUS FORD STOCK 57MM TESTED @ 5" - 158 CFM CORR @ 20" - 316 CFM CORR @ 25" - 354 CFM CORR @ 28" - 374 CFM
CENTRAL COAST 65MM TESTED @ 5" - 268 CFM CORR @ 20" - 536 CFM CORR @ 25" - 600 CFM CORR @ 28" - 635 CFM
BUICK GRAND NATIONAL 1986 - 1987 STOCK 57MM - test results not available
ACCUFAB 65MM TESTED @ 5" - 274 CFM CORR @ 20" - 548 CFM CORR @ 25" - 614 CFM CORR @ 28" - 649 CFM
ACCUFAB 70MM TESTED @ 5" - 300 CFM CORR @ 20" - 600 CFM CORR @ 25" - 672 CFM CORR @ 28" - 711 CFM
DODGE VIPER STOCK R/T-10 - test results not available STOCK GTS - test results not available
STOCK 2003 TWIN 65MM TESTED @ 5" - 524 CFM CORR @ 20" - 1048 CFM CORR @ 25" - 1173 CFM CORR @ 28" - 1241 CFM
ACCUFAB RT-10 65MM TESTED @ 5" - 258 CFM CORR @ 20" - 516 CFM CORR @ 25" - 578 CFM CORR @ 28" - 611 CFM
ACCUFAB GTS 70MM TESTED @ 5" - 294 CFM CORR @ 20" - 588 CFM CORR @ 25" - 659 CFM CORR @ 28" - 697 CFM
CHEVROLET STOCK 1993 CAMARO TESTED @ 7" - 357 CFM CORR @ 20" - 603 CFM CORR @ 25" - 675 CFM CORR @ 28" - 714 CFM
STOCK 1996-2002 CAVALIER L850 ENGINE TESTED @ 7" - 188 CFM CORR @ 20" - 318 CFM CORR @ 25" - 355 CFM CORR @ 28" - 376 CFM
STOCK 2002 & UP CAVALIER LD9 ENGINE TESTED @ 7" - 240 CFM CORR @ 20" - 406 CFM CORR @ 25" - 454 CFM CORR @ 28" - 480 CFM
STOCK 1998 & UP CAMARO LS1 75MM TESTED @ 5" - 337 CFM CORR @ 20" - 674 CFM CORR @ 25" - 754 CFM CORR @ 28" - 798 CFM
ACCUFAB 1998 & UP CAMARO LS1 75MM TESTED @ 5" - 389 CFM CORR @ 20" - 778 CFM CORR @ 25" - 871 CFM CORR @ 28" - 922 CFM
HONDA Stock S-2000 TESTED @ 7" - 287 CFM CORR @ 20" - 485 CFM CORR @ 25" - 542 CFM CORR @ 28" - 574 CFM
MISCELLANEOUS STOCK 1997 EXPLORER 65MM TESTED @ 7" - 340 CFM CORR @ 20" - 575 CFM CORR @ 25" - 643 CFM CORR @ 28" - 680 CFM
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FLOW CONVERSION CHART
WANT FLOW AT:
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HAVE FLOW AT: |
3" | 5" | 7" | 10" | 12" | 15" | 20" | 25" | 28" | 30" | 35" | 40" | 45" | ||||
| 3" | 1.00 | 1.29 | 1.53 | 1.82 | 2.00 | 2.24 | 2.58 | 2.89 | 3.05 | 3.16 | 3.42 | 3.65 | 3.87 | ||||
| 5" | .774 | 1.00 | 1.18 | 1.41 | 1.55 | 1.73 | 2.00 | 2.24 | 2.37 | 2.45 | 2.65 | 2.83 | 3.00 | ||||
| 7" | .655 | .845 | 1.00 | 1.12 | 1.31 | 1.46 | 1.69 | 1.89 | 2.00 | 2.07 | 2.24 | 2.39 | 2.54 | ||||
| 10" | .548 | .707 | .837 | 1.00 | 1.09 | 1.22 | 1.41 | 1.58 | 1.67 | 1.73 | 1.87 | 2.00 | 2.12 | ||||
| 12" | .500 | .645 | .764 | .913 | 1.00 | 1.12 | 1.29 | 1.44 | 1.53 | 1.58 | 1.71 | 1.83 | 1.94 | ||||
| 15" | .447 | .677 | .683 | .816 | .894 | 1.00 | 1.15 | 1.29 | 1.37 | 1.41 | 1.53 | 1.63 | 1.73 | ||||
| 20" | .387 | .500 | .592 | .707 | .774 | .866 | 1.00 | 1.12 | 1.18 | 1.22 | 1.32 | 1.41 | 1.50 | ||||
| 25" | .346 | .447 | .529 | .632 | .683 | .775 | .894 | 1.00 | 1.06 | 1.10 | 1.18 | 1.28 | 1.34 | ||||
| 28" | .327 | .422 | .500 | .598 | .654 | .732 | .845 | .945 | 1.00 | 1.04 | 1.12 | 1.20 | 1.27 | ||||
| 30" | .318 | .408 | .483 | .577 | .632 | .707 | .816 | .913 | .966 | 1.00 | 1.08 | 1.15 | 1.22 | ||||
| 35" | .293 | .378 | .447 | .535 | .586 | .655 | .756 | .845 | .894 | .926 | 1.00 | 1.07 | 1.13 | ||||
| 40" | .274 | .354 | .418 | .500 | .548 | .612 | .707 | .791 | .837 | .866 | .935 | 1.00 | 1.08 | ||||
| 45" | .258 | .333 | .394 | .471 | .516 | .577 | .667 | .745 | .789 | .816 | .882 | .943 | 1.00 | ||||
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