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AFR 225 cc Mongoose Aluminum Cylinder Heads for Chevy LS1
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For the maximum street/strip LS1/LS6 aluminum cylinder head AFR’s
all new 225cc emission legal head E/O #D250-4 are hands down the
best choice. Specifically designed for 1995 to present Gen-3 Chevy
Corvettes, Camaros, and trucks. AFR’s LS1 head offers unmatched
flow performance and features 2.080 intake and 1.600 exhaust valves
with AFR’s iron ductile interlocking valve seats. The 225cc is ideal
for normally aspirated 396C.I. to 427C.I. For a wild 346 ci the 225
is a good choice, however some low RPM loss of torque might occur.
It is available with 62cc and 72cc combustion chambers. An affordable
“as cast” version is also available. AFR’s LS1 is a direct bolt on,
no special parts required. Structural features like Air Flow Research’s
trademark 3/4” thick head deck, a must for blown and nitrous applications,
reinforced rocker stud bosses and thick wall runners provide unparalled
durability. An exclusive new modern combination chamber design with
double quench pad area helps the LS1 generate huge low and mid lift
airflow numbers. If you need a snake charmer for that pesky
neighborhood “Cobra Mustang” look no further!
Note:
Hydraulic roller cams in "LS" Gen III engines typcially experience valve
float at 6600-6800 RPM's. If you plan on running over .600 gross valve
lift and/or 6600 RPM, We suggest you upgrade your springs to AFR part #8019.
The upgraded spring has higher seat and open pressures (145/380+) to better
reduce the risk of valve float in more aggressive applications. We also
recommend the use of Comp "R" lifters in conjunction with the 8019 spring upgrade.
FREE Shipping on ALL AFR Heads!!!
All Chevy LS-1 AFR Heads not "In Stock" are made to order (3-4 WEEK BUILD TIME) and are ordered after payment is received.
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| Kit Description |
Part Number |
Price |
Buy |
| 225cc Big Bore CNC Ported with parts 62cc |
1610 |
$2495 |
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| 225cc Big Bore CNC Ported without parts 62cc |
1620 |
$2195 |
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| 225cc Big Bore CNC Ported with parts 72cc |
1630 |
$2495 |
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| 225cc Big Bore CNC Ported without parts 72cc |
1640 |
$2195 |
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| 225cc Small Bore CNC Ported with parts 65cc |
1660 |
$2495 |
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| 225cc Small Bore CNC Ported without parts 65cc |
1670 |
$2195 |
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| Upgrade LS-1 225 Spring #8017 to #8019 - Standard valves included |
8047 |
$99 |
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Intake Port:
Exhaust Port:
Flow Chart:
Combustion Chamber:
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LS1 Dyno Test
Baseline Engine: Stock LS-1 Longblock, LS-6 Intake Manifold, 1 3/4"
Headers-Long Tube Style, 3" Flowmaster Mufflers.
VS.
All Same As Above With The Exception Of: AFR LS-1 "205" CNC Heads, Fast
Intake Manifold, Cam-224/228 @.050 .581 Lift, 78mm Ported Throttle Body.
AFR LS-1 "205" CNC Heads 530HP@6500 and 475lbft@4900
VS.
Stock Heads 428HP@5700 and 432lbft@4700
Compression Remained Stock for Both Tests.
High RPM Dyno:
Low RPM Dyno:
Basic Package Components:
100% CNC Ported Combustion Chambers
100% CNC Ported Exhaust Ports
100% CNC Ported Intake Ports
3-angle Raduised Valve Job
Intake Valve, 2.080” standard length #7208
Exhaust Valve, 1.600” standard length #7228
1.290” O.D. Dual Hydraulic Valve Spring, 135 lbs. on seat,
.600” maximum lift (upgrades available) #8017
7º 1.250 Titanium Retainers #8512
7º Valve Locks #9007
Valve Seals #6612
Spring Cup #8042
Intake Valve Seats #9059
Exhaust Valve Seats #9069
Bronze Valve Guides #9051
All Accessory Holes are Predrilled & Tapped!
Specifications, Features, and Supporting Components:
Head Torque 11MM ARP 70 FT lbs w/ Moly 8mm 23 FT lbs w/ Moly
Exhaust Port Gasket GM#12558573/ Fel-Pro #1440 AFR#6859
Intake Port Volume (as cast) 220cc
Intake Valve Size 2.080
Exhaust Port Volume (as cast) 78cc
Head Gasket GM#12498543 or 12498544, Fel-Pro#1041, AFR#6847 Cometic AFR #6846
Head Bolts & Studs Standard ARP, AFR #6330, #6331 & #6332
Head Bolt Washers Standard ARP, AFR #6328 & #6329
Jesel or TD Shaft Mount
Suggested Manifold LS6, FAST or TPIS
Accessory Holes Are Pre Drilled
Spark Plug Starting Range AC 41-974 Platinum
Combustion Chambers 66cc or 76cc
Spring Pocket 1.450 O.D can be machined to 1.550 O.D.
Valve Spacing Stock
Rocker Arms Location Stock
Valve Angle Stock
Angle Mill (milling available) .008” per cc
Flat Mill (milling available) .006” per cc
Note: Milling head deck will affect flow numbers
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View the rest of our catalog:
Full Catalog
Please contact us with any questions:
2587 Dos Lomas
Fallbrook, Ca 92028
(760) 586-5617
Email: sales@TREperformance.com
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