NK Performance and Racing
AFR Mongoose 230CC LS1 CYLINDER HEADS
AFR Mongoose 230CC LS1 CYLINDER HEADS
Regular price
$2,955.73 USD
Regular price
Sale price
$2,955.73 USD
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Our 230cc LS1 MONGOOSE cylinder heads are recommended for aggressive street or street/strip builds with displacements up to 427 cubic inches operating at or below 7200 RPM. Capable of flowing 328 CFM at 0.650" lift with a 4.000" bore size.
| Included Components | |
| 100% CNC Ported Combustion Chambers | |
| 100% CNC Ported Exhaust Ports | |
| 100% CNC Ported Intake Ports | |
|
Competition 5-angle Valve Job |
|
| 8mm Bead Lock Intake Valve, 2.080" x 4.900" Overall Valve Length | |
| 8mm Bead Lock Exhaust Valve, 1.600" x 4.900" Overall Valve Length | |
| PAC Racing Spring 1.270" OD Hydraulic Roller Dual Valve Spring, 155 lbs. on seat, .650” maximum lift, Max RPM 7000-7200 | |
| 7° Titanium Retainers 1.245" O.D x .885" I.D x .655" I.D | |
| 7° Bead Lock Valve Keepers | |
| Viton Valve Seals .600" O.D x .495" I.D | |
| Hardened Valve Spring O.D Locator 1.380" O.D x .570" I.D | |
| Ductile Iron Intake Valve Seats 2.131" O.D x 1.680" I.D x .375" Deep | |
| Ductile Iron Exhaust Valve Seats 1.650" O.D x 1.350" I.D x .375" Deep | |
| 8 mm Bronze Valve Guides .502" O.D x 2.100" O.A.L | |
*LSX bead locks and aftermarket bead locks are not interchangeable. GM made their bead lock radius and depth different. AFR locks are the same as GM LSX.
| 230cc Small Bore Competition Flow Chart | ||||||
| .200 | .300 | .400 | .500 | .550 | .600 | |
| Int | 157 | 224 | 272 | 311 | 320 | 324 |
| Exh | 129 | 183 | 225 | 244 | 248 | 252 |
Test conducted at 28" of water (pressure) on Superflow 600
Bore Size: 3.900", intake 3/4" radius plate exhaust, 1 3/4" curved pipe
| Specifications & Features: | |
| Material |
A356 Aluminum
|
| Intake Port Volume |
230cc
|
| Intake Port Dimension |
3.250"H x 1.115"W x5/16 top 3/8 bottom
|
| Intake Port Location |
Stock
|
| Exhaust Port Volume |
86cc
|
| Exhaust Port Dimension |
1.385" H x 1.695" W
|
| Exhaust Port Location |
Stock
|
| Combustion Chamber Size |
62cc, 65cc, or 72cc
|
| Valve Cover Bolt Pattern |
Center Bolt
|
| Valve Angle |
15°
|
| Valve Spring Pocket Diameter |
1.510" O.D
|
| Max Valve Spring Pocket Machining |
1.525" O.D
|
| Deck Thickness |
.750"
|
| Minimum Bore Diameter |
3.900"
|
| Flat Mill - 62cc chamber |
.006" per cc 58cc Maximum
|
| Flat Mill - 72cc chamber |
.006" per cc 67cc Maximum
|
| Minimum Cross Sectional Area |
2.425 sq. in.
|
| Spark Plug Dimensions |
14mm x .750" w/Tapered Seat
|
|
CARB Status: This product is not legal for sale or use on emission-controlled vehicles and intended for dedicated race vehicles only. |
|
| Recommended Components: | |
| Intake Port Gasket |
GM or FAST
|
| Exhaust Port Gasket |
GM#12558573
|
| Head Gasket for Small Bore |
Cometic 3.930 .040" or AFR #6846
|
| Head Gasket for Large Bore |
Cometic 4.160 .040" or AFR #6848
|
| Head Bolts (97-03) |
ARP 134-3609 or AFR #6330
|
| Head Studs (97-03) |
ARP 234-4110 or AFR #6331
|
| Head Bolts (04+) |
ARP 134-3610 or AFR #6334
|
| Head Studs (04+) |
ARP 234-4317 or AFR #6335
|
| Head Bolt Washers, Manley | |
| Suggested Manifold |
FAST 90mm, 92mm, or 102mm
|
| Spark Plug Starting Range |
NGK TR55
|
