Kinsler_Handbook_#32 December 2017

Kinsler Fuel Injection, Inc, 1834 THUNDERBIRD TROY, MICHIGAN 48084 U.S.A. www.Kinsler.com Phone (248) 362-1145 Fax (248) 362-1032 78 FUNCTION 1) The orifices in the nozzles meter the fuel to the engine in conjunction with the main bypass return jet and the fuel pump. 2) Control the distribution of fuel to each cylinder of the engine. 3) Atomize and direct the fuel being injected. NOZZLES: CONSTANT FLOW FLOWED AND MATCHED Customers spend lots of money having their cylinder heads air flowed and ported to get even flow characteristics, but then use nozzles that have fuel distribution as bad as 10-15%. Commercial nozzles just aren’t made well enough. Very tiny differences in the hole size and machining marks around the inlet or outlet of the fuel orifice makes significant changes in fuel flow. Nozzles are affected by the same problems as the return jets. Read “THE K-TYPE JETS” on Pages #72-73 and “ORIFICE THEORY” on Pages #199-200. KINSLER STANDARD NOZZLE IDENTIFICATION We stamp our flowed nozzles with - the name “KINSLER”; a size reference; a flow code, and a deflector style-air orifice reference. Example: S-710 AS-78 explanation : The ‘S’ indicates a nominal .0338” orifice - orifice sizes may vary + .0004” due to machining tolerances, so hand matching is still required. The 710 is the flow code. AS is the deflector style (see deflector types on next page). 78 refers to a .078” air orifice in the deflector, also referred to as the vacuum break restrictor. An ‘X’ indicates a nozzle with .039” or larger fuel orifice. Example: X-39 930 AS-89 The ‘X’ followed by 39 means a .039” fuel orifice; 930 is the flow code; ‘AS’ is deflector style; 89 refers to a .089” air orifice in the deflector. The flow code is the pounds per hour (lbs/hr) of fuel flow at 30 PSI for one nozzle. Example: S-710 is really 71.0 lbs/hr at 30 PSI. You can calculate the flow of a nozzle at any fuel pressure - see “ORIFICE THEORY” on Pages #199-200. Kinsler nozzle sets are flowed and matched to within a 1% total spread in distribution. The orifices are radiused and polished to promote even flow. Each nozzle is individually flow tested through a range of pressures and hand matched to a master reference nozzle. Should a nozzle not work into the master flow curve, it is discarded or resized for use in a larger set. * + or - approx. 8% from flows shown at left (they code their inserts by orifice diameter number) © 2017 Kinsler nozzle Flow Code lbs/hr flow per nozzle at 30 PSI gasoline .72 sp. gr. @ 60 F Nominal orifice size Approx. Hilborn size *Crower & Enderle nozzle size E-165 16.5 .016" 4 16 F-200 20.0 .017" 5 17 G-240 24.0 .020" 6 20 H-280 28.0 .0215" 7 21 J-320 32.0 .0225" 8 22 K-360 36.0 .0238" 9 24 L-390 39.0 .025" --- 25 M-410 41.0 .0259" 10 26 N-470 47.0 .0277" --- 28 P-510 51.0 .0289" 12 29 P-550 56.0 .0294" 14 31 R-620 62.0 .0318" 16 32 S-710 71.0 .0338" 18 33 T-740 74.0 .0349" --- 35 T-792 79.2 .0359" 20 --- U-800 80.0 .036" --- 36 V-840 84.0 .0373" 22 37 W-880 88.0 .038" 24 38 X-39 930 93.0 .039" 27 39 o ‘A’ type; fuel discharged at 45 to body through notch cut in deflector, commonly called ‘whistle’ or notch o ‘AS’ type; fuel discharged in line with body through a diffuser screen, commonly called ‘screen tip’ or ‘shot-gun’

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