 |
GILBERT CHEVROLET - AFR 180CC SMALL BLOCK CHEVROLET HEADS | |
| Air Flow Research Emissions Legal (versions from 1969-94 with heat riser, CARB EO #D-250-2), 180cc intake port small-block Chevy cylinder heads. Call for prices and more information on these heads. | |||||||||||||
| |||||||||||||
|
WEB SITE NAVIGATION INFORMATION | |
| If you have you just came from a search engine and are stuck with no navigation, turn on Java Scripts in your Web browser, reload the page, then you can turn off Java Scripts again. Also, people using Internet Explorer have to use the pull down tab next to the back button to return to a search engine. More information on this is on our help page. |
| GM and GILBERT CHEVROLET part prices are in the Price & Parts search. Keys are to be used with the Price & Parts Search. Enter a Key, part number, GM, SC, or a key word, like 502, into the Price & Parts search to see if we have it on our site. Use GM for a list of both GM and GMPP parts. Use SC for a list of all GILBERT CHEVROLET exclusive parts. Aftermarket company prices are on downloadable Price Sheets or on their pages. The Page Search is for searching the pages of our Web site. More information on this is on our help page. |
 |
 |
|
|
AFR NAVIGATION | |
| Index Page | 195cc SBC Street |
| 335cc BBC Rectangular CNC Ported | 305cc BBC As Cast Torquer |
| AFR Parts & Accessories | 205cc LS1 Mongoose Street |
| 180cc SBC Street | 357cc BBC Rectangular CNC Ported |
| AFR Hydra-Rev Kits | |
| Note: You must call us for prices. GILBERT CHEVROLET will not be posting prices for AFR heads on our web site. | |
|
|
|
|
AFR 180CC SBC STREET CYLINDER HEAD DESCRIPTION | |
| THE SMALL PORT, HIGH VELOCITY TORQUE MONSTER | |
|
The AFR Emissions Legal (versions from 1969-94 with heat riser, CARB EO #D-250-2), 180cc intake port small block Chevy cylinder heads are available in your choice of straight, or L98 angle plug versions. These heads feature a 74cc or 68cc combustion chamber with a 64cc exhaust port and a 3/4” thick head deck (ideal for nitrous or blower applications.) The 68cc chambers are designed for flat top or dished pistons; domed pistons will require additional machining. Standard valves are 2.020 intake and 1.600 exhaust with AFR’s hardened ductile iron interlocking valve seats. The exceptional flow characteristics, ideal operating range of idle to 5500 rpm (higher rpm ranges possible depending on combination of parts), 23° valve angle, and standard valve spacing make this the perfect street head for 327 cid to 350 cid engines from 1955-86. Also available for 1987 to present engines with center bolt valve covers and 2 center intake bolts at 72° angle. No special parts are required. Vortec style head available too. Note: Hydraulic roller cams typically experience valve float at 5800-6000 rpm because of their fast ramp rates. AFR suggest you upgrade your springs to AFR part #8032, 1.530 O.D. with higher spring pressures and use our Patented “Hydra Rev Kit” to reduce chances of valve float associated with rpm 6000 or higher. |
 |
 |
 |
|
|
|
|
BASIC PACKAGE COMPONENTS | |
|
• 100% CNC Ported Combustion Chambers • 100% CNC Ported Exhaust Ports • 100% CNC Ported Intake Ports • 3-angle Valve Job • Intake Valve, 2.020” standard length, AFR #7204 • Exhaust Valve, 1.600” standard length, AFR #7219 • 1.450" OD Hydraulic Dual Valve Spring, 120 lbs. on seat, .550” maximum lift, AFR #8020 • 10° 4140 Chrome Moly Retainers, AFR #8510 |
• 10° Valve Locks, AFR #9005 • 3/8” Rocker Studs, AFR #6410 • Guide Plates, AFR #6105 • Valve Seals, AFR #6611 • Hardened Shims, AFR #8043 • Intake Valve Seats, AFR #9060 • Exhaust Valve Seats, AFR #9070 • Bronze Valve Guides, AFR #9050 • Special orders available upon request. |
| Note: All Accessory Holes are Predrilled & Tapped! | |
|
|
|
|
SPECIFICATIONS, FEATURES, AND SUPPORTING COMPONENTS | |
|
• Head Torque 65-70 Ft. Lbs. • Rocker Stud Torque 55-60 Ft. Lbs. • Intake Port Gasket, 1.230”x1.990” w/ 3/8" Radius, AFR #6815* • Exhaust Port Gasket Fel Pro #1404, AFR #6834 • Head Gasket 350cid Fel Pro #1003, AFR #6800 • 400cid Fel Pro #1014, AFR #6802 • Head Bolts & Studs Standard ARP, AFR #6310 & #6305 • Head Bolt Washers Manley, AFR #6320 • Stud Girdle AFR #6201 • Suggested Manifold Edelbrock #3701, AFR #5029 |
• Spark Plug Starting Range AC FR3LS • Combustion Chambers 74cc or 68cc • Spring Pocket can be cut to 1.625, no deeper. • Valve Spacing Standard • Rocker Arms Standard • Valve Angle 23° • Angle Mill (milling available) .008” per cc • Flat Mill (milling available) .006” per cc • Pushrods 5/16” Hardened AFR #6600 & #6601 |
| Note*: Do not port match your intake manifold to this Fel-Pro gasket, as they do not exactly fit AFR heads. | |
|
|
|
|
HEAD COMBINATIONS WE HAVE IN STOCK | |
| Part Number | Serial Number | Runner Volume | Combustion Chamber | Plug Type | Qty. | Head Description |
| 918 | 1106 | 180 | 68cc | L98 | 1 | 180cc L98 plug pattern 68cc, 8020 - Std. Hyd. Spr. 1.450 OD, 7204 - Std. Int. valve SST, 7219 - Std. Exh. valve SST, 8510 Std. 10 Deg. Ret. 1.450 OD, 9060 - Std. Int. Seats 2.200 OD, 9070 - Std. Exh. Seats 2.000 OD, 6410 - 3/8” Rocker Stud Std. Length. |
| 916 | 1104 | 180 | 68cc | Straight | 1 | 180cc Straight 68cc, 8020 - Std. Hyd. Spr. 1.450 OD, 7204 - Std. Int. valve SST, 7219 - Std. Exh. valve SST, 8510 Std. 10 Deg. Ret. 1.450 OD, 9060 - Std. Int. Seats 2.200 OD, 9070 - Std. Exh. Seats 2.000 OD, 6410 - 3/8” Rocker Stud Std. Length. |
| 918 | 1107 | 180 | 68cc | L98 | 1 | 180cc L98 plug pattern 68cc, 8020 - Std. Hyd. Spr. 1.450 OD, 7204 - Std. Int. valve SST, 7219 - Std. Exh. valve SST, 8510 Std. 10 Deg. Ret. 1.450 OD, 9060 - Std. Int. Seats 2.200 OD, 9070 - Std. Exh. Seats 2.000 OD, 6410 - 3/8” Rocker Stud Std. Length. |
|
|
|
