CARBURETORS & ACCESSORIES - Carburetor Application Guidelines
CARBURETOR APPLICATION GUIDELINES
GENERAL APPLICATION USE

Carburetor Application Guidelines (114k)
Thunder Series AVS Carburetors Carb Size (CFM Rating) Secondary Type General Displacement Guidelines Cam Guide (Duration @ .050) Intake Type (B) Carb Part# Reference EnduraShine Finish Part # Calibration Kit
Mild perf. street (small CID) single-quad 500 cfm Adj. Velocity 225 - 327 cid Up to 220° Dual plane 1801*/1802* 18014*/18024* 1486 (F)
Mild perf. street (small CID) dual-quad 500 cfm Adj. Velocity 225 - 327 cid Up to 220° Dual plane 1803*/1804* 18034*/18044* 1486 (C,D)
Moderate high-performance street 650 cfm Adj. Velocity 302 - 400+ cid Up to 220° Dual plane 1805*/1806* 18054*/18064* 1840 (E)
Off-road high-performance 650 cfm Adj. Velocity 283 - 460 cid Up to 220° Dual plane 1825*/1826* 18254*/18264* 1842
High-performance street/light strip 800 cfm Adj. Velocity 350 - 502 cid Up to 250° Dual plane & small single plane 1812*/1813* 18124*/18134* 1841
 
Performer Series Carburetors Carb Size (CFM Rating) Secondary Type General Displacement Guidelines Cam Guide (Duration @ .050) Intake Type (B) Carb Part# Reference EnduraShine Finish Part # Calibration Kit
Stock replacement/mild perf. street. Calibrated for economy, 50-state legal on ’80 and prior GM only 600 cfm Velocity 305 - 350 cid Up to 200° Dual plane 1400 N/A N/A
Mild perf. street small CID & dual-quad 500 cfm Velocity 225 - 327 cid Up to 220° Dual plane 1403*/1404* N/A 1486 (C)
Moderate street high performance, street and towing 600 cfm Velocity 302 - 400+ cid Up to 220° Dual plane 1405* 14054* 1479
Mild perf. street, calibrated for economy 600 cfm Velocity 302 - 400+ cid Up to 220° Dual plane 1406* 14064* 1487
High-performance street (small CID), Moderate high-perf. (big CID), towing 750 cfm Velocity 350 - 502 cid Up to 230° Dual plane & small single plane 1407* N/A 1480
Mild performance street, towing, calibrated for economy w/performance 750 cfm Velocity 350 - 502 cid Up to 230° Dual plane 1411* N/A 1489
High-performance street/light strip 800 cfm Velocity 350 - 502 cid Up to 250° Dual plane & small single plane 1412*/1413* N/A 1480
Dual-Quad Small-Block Mild/High-Perf 500 cfm Velocity 302 - 400+ cid Up to 220° Dual Quad 1403*/1404* N/A N/A
Dual-Quad Big-Block Mild/High-Perf 600 cfm Velocity 400 - 502 cid Up to 250° Dual Quad 1405* 14054* N/A
 
Performer Series Marine Carburetors Carb Size (CFM Rating) Secondary Type General Displacement Guidelines Cam Guide (Duration @ .050) Intake Type (B) Carb Part# Reference EnduraShine Finish Part # Calibration Kit
Mild marine performance 600 cfm Velocity 302 - 400 cid Up to 220° Dual plane 1409* N/A 1488 (A)
Mild marine performance 750 cfm Velocity 400 - 502 cid Up to 250° Dual plane & small single plane 1410* N/A 1480

(A) Use calibration kit #1485 on 4.3L 90¡ V6 with #2111 & #2114 manifold
(B) Adapter #2696 required for OEM spread-bore intakes
(C) Calibration required for single quad applications only
(D) For dual-quad applications from 302-400+ cid
(E) For dual-quad applications from 396-502+ cid
(F) Calibrated for single carb applications only
* Not legal for sale or use on pollution controlled motor vehicles.
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