Tight Lash Camshafts For SB Chevys 7KH³7LJKW/DVK´VHULHVLVDOLQHRIUDFHRQO\ÀDWWDSSHWFDPVKDIWVWKDWZRUNZHOOLQFLUFOHWUDFNHQJLQHV5DPSVDFFHOHUDWHWKH YDOYHWRDKLJKHUVSHHGDVLWJRHVXSWRWKHQRVHDQGVHWLWGRZQDWDFRQWUROOHGVSHHGRQWKHVHDW6LJQL¿FDQWSRZHULQFUHDVHVFDQ EHJDLQHGRYHUHDUOLHUVW\OHVZLWKQRVDFUL¿FHLQWKH³RIIWKHFRUQHU´FKDUDFWHULVWLFV
Valve Setting
Advertised Duration
Duration @.050"
Lift With 1.5 Rockers Lobe Sep. Angle In. Ex.
Recommended Components
Camshaft Part Number
Valve Springs
Steel Retainers
Application
In.
Ex.
In.
Ex.
In.
Ex.
Lifters
Solid - Short Track, 327-350, 2bbl, 2800-6300 Solid - Short 3/8-1/2 Mi. Track, 358, Late Model, 3000-7000 RPM Solid - 3/8-1/2 Mi. Track, 358, Late Model, 3200-7000
.018" .020" COM12-500-5 276° 280° 246° 250° .520" .530" 106° COM950-16 COM740-16 COM813-16 .018" .020" COM12-504-5 284° 284° 254° 254° .540" .540" 106° COM950-16 COM740-16 COM813-16 .018" .020" COM12-505-5 284° 288° 254° 259° .540" .550" 106° COM950-16 COM740-16 COM813-16 .018" .020" COM12-506-5* 288° 292° 259° 262° .550" .560" 106° COM950-16 COM740-16 COM813-16
Solid - 3/8-1/2 Mi. Track, 350-377, Open Rules, 3400-7000 RPM Solid - Big 3/8-1/2 Mi. Track, 400+, Open Rules, 3500-7200 RPM
.018" .020" COM12-515-5* 288° 296° 259° 266° .550" .570" 106° COM950-16 COM740-16 COM813-16
* Signifies camshaft also available nitrided for added durability. Simply replace “-5” suffix in part number with “-20”. Example: COM12-506-20. 4 & 7 Firing Order Swap (18736542) Camshafts For SB Chevys /HDGLQJHQJLQHEXLOGHUVKDYHEHHQKDYLQJ VZDSFDPVKDIWVFXVWRPJURXQGIRUPDQ\\HDUVLQWKHSXUVXLWRIDGGHGKRUVHSRZ HU&RPSRIIHUVDIXOOVHOHFWLRQRIERWKVROLGDQGUROOHU VZDSFDPVWRUDFHUVORRNLQJIRUDQHGJHRQWKHFRPSHWLWLRQ
Valve Setting
Advertised Duration
Duration @.050"
Lift With 1.5 Rockers Lobe Sep. Angle In. Ex.
Recommended Components
Camshaft Part Number
Valve Springs
Titanium Retainers
Application
In.
Ex.
In.
Ex.
In.
Ex.
Lifters
Solid- 1/4-3/8, 327-358 2bbl, 3000-6800 RPM Solid- 1/4-3/8, 327-358 4bbl, 3000-6700 RPM Solid- 3/8-1/2, 360+4bbl, 3400-7200 RPM
.016" .018" COM12-688-47 278° 284° 248° 250° .531" .525" 106° COM950-16 COM730-16 COM813-16 .016" .018" COM12-689-47 282° 292° 252° 258° .540" .537" 106° COM950-16 COM730-16 COM813-16
.016" .018" COM12-690-47 290° 300° 260° 266° .558" .549" 106° COM950-16 COM730-16 COM813-16 Roller- Short Track/Small Engine, 4000-7000 RPM .020" .022" COM12-823-14 † 288° 296° 252° 258° .630" .630" 106° COM954-16 COM731-16 COM818-16 Roller- Dirt Late Model 4bbl, 4400-7600 RPM .020" .022" COM12-826-14 † 288° 296° 258° 264° .639" .632" 106° COM954-16 COM731-16 COM818-16
† Requires upgraded gear, thrust button, and wear plate. High Energy Hydraulic Lifters /LIWHUVKDYHOLJKWZHLJKWFKHFNYDOYHVWRHOLPLQDWH H[FHVVLYHRLOLQJDWKLJK5306ROGLQVHWVRI Part No. Description COM812-16 Chevrolet, All V-8 COM832-16 SB Ford 289-351W COM846-8 Ford 2300cc 4-Cyl. Pro Magnum Hydraulic Lifters /LIWHUVSHUIRUPZHOODWKLJKHU530DQGKDYHDGLVWLQFW DGYDQWDJHZKHQXVLQJK\GUDXOLFWDSSHWV6ROGLQVHWVRI Part No. Description COM858-16 Chevrolet, All V-8 COM862-16* SB Ford 289-351W * Lifters require an adjustable valve train. Chevy Race Hydraulic Lifters COM84000-16 /LIWHUVKDYHWLJKWHUWROHUDQFHVRQHSLHFH
Performance Series Solid Lifters (QJLQHHUHGIRUKLJKHQGUDFLQJDSSOLFDWLRQVOLIW HUVKDYHSUHFLVHWROHUDQFHVIRUVXSHULRUFDPVKDIW FRPSDWLELOLW\DQGKLJK530GXUDELOLW\6ROGLQVHWV RI Part No. Description COM2900-16 Chevrolet, All V-8 COM2910-16 SB Ford 302-351W, 1969-Up Sportsman Solid Roller Lifters /LJKWZHLJKWSUHPLXP6SRUWVPDQ6ROLG5ROOHU /LIWHUVXVHWZRSUHVVXUL]HG('0RLOIHHGV WRWKHD[OHDQGDVLQJOHHGJHRUL¿FH
IHHGWRWKHZKHHOIRULPSURYHG RLOLQJDQGUHOLDELOLW\0DQXIDF WXUHGIURPTXDOLW\VWHHOIRU PD[LPXPGXUDELOLW\DQGUHVLVWDQFH
WRZHDUOLIWHUVDUHLQWHUQDOO\PDFKLQHGIRUUHGXFHGZHLJKW7DOO ERG\GHVLJQDOORZVXVDJHLQVWDQGDUGRUWDOOOLIWHUERUHV &KRRVHIURPWUDGLWLRQDOQHHGOHEHDULQJD[OHZKHHOGHVLJQRU EURQ]HEXVKLQJD[OHZKHHOFRQ¿JXUDWLRQ6ROGLQVHWVRI
SXVKURGVHDWVDQGH[WUDKHDY\GXW\ VQDSULQJV)LWVDOO&KHY\9 V6ROGLQ VHWVRI Solid Lifters
Pushrod Seat Location
Needle Bearing Part No.
Bushing Part No.
Application Small Block Chevy Small Block Chevy
Dia.
.842"
All Centered
COM96818-16 COM96818B-16
(4) Pairs: Centered & .160" Left (4) Pairs: Centered & .160" Right
7KHOLIWHUFURZQKDVEHHQJURXQGWRDSUHFLVHUDGLXV DQGWKHRLOPHWHULQJEDQGPLOOHGWRHOLPLQDWHH[FHV VLYHRLOEHLQJSXPSHGWRWKHWRSRIWKHHQJLQH 6ROGLQVHWVRI Part No. Description COM800-16 Chevrolet, All V-8, .012" Hole COM813-16 Chevrolet, All V-8 COM833-16 SB Ford 302-351W, 1969-Up
.842"
COM96894-16 COM96894B-16
Small Block Ford .875"
All Centered
COM96838-16 COM96838B-16
271
2019-20 CIRCLE TRACK PARTS AND ACCESSORIES
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