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Factory Specs: Cams, Heads, Intakes

This is a discussion on Factory Specs: Cams, Heads, Intakes within the Internal Engine forums, part of the LSx Technical Help Section category; Found this info, thought I'd share. Below is the URL for the site I found this info. I tried to ...

  1. #1
    Member hoss 2000 z-28's Avatar
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    Monterey Maroon Metalic
    2000 Z28

    Factory Specs: Cams, Heads, Intakes

    Found this info, thought I'd share.

    Below is the URL for the site I found this info. I tried to make the copy and paste look decent.

    http://www.smokemup.com/tech/ls1.php
    ---------------------------------------------------------------
    LS1 Info and Specifications

    LS1 Camshaft Specifications
    1998 - 2000 Fbody
    202/210 int/exh @ 0.05" duration 0.496" / 0.496" int/exh lift 116 LSA

    2001 - 2002 Fbody
    197/207 int/exh @ 0.05" duration 0.467" / 0.479" int/exh lift 116 LSA

    2001 LS6 cam
    207/217 int/exh @ 0.05" duration 0.525" / 0.525" int/exh lift 116 LSA

    2002+ LS6 cam
    204/218 int/exh @ 0.05" duration 0.551" / 0.547" int/exh lift 117 LSA

    GMPP Hot Cam
    218/227 int/exh @ 0.05" duration 0.525" / 0.525" int/exh lift 112 LSA

    GMPP ASA Cam
    226/236 int/exh @ 0.05" duration 0.525" / 0.525" int/exh lift 110 LSA

    6.0 LQ9
    207/196 int/exh @ 0.05" duration 0.479" / 0.467" int/exh lift 116 LSA

    5.3 LM7
    190/191 int/exh @ 0.05" duration 0.466" / 0.457" int/exh lift 114 LSA

    Stock 5.3 Heads
    Chamber 61.15 cc 0.100 0.200 0.300 0.400 0.500 0.550 0.600
    Intake 200 cc 63 128 179 210 218 221 226
    Exhaust 70 cc 54 93 121 145 163 168 174
    Valve Diameter Intake 1.89"
    Valve Diameter Exhaust 1.55"
    Part Number 12559852 12561706

    Stock 6.0 Heads
    Chamber 71.0 cc 0.100 0.200 0.300 0.400 0.500 0.550 0.600
    Intake ??? 66 142 196 228 236 238 240
    Exhaust ??? 59 104 137 155 167 173 177
    Valve Diameter Intake 2.00"
    Valve Diameter Exhaust 1.55"

    Stock LS1 Heads
    Chamber 66.67 cc 0.100 0.200 0.300 0.400 0.500 0.550 0.600
    Intake 200 cc 67 122 178 215 219 223 227
    Exhaust 70 cc 52 97 133 156 170 176 180
    Valve Diameter Intake 2.00"
    Valve Diameter Exhaust 1.55"
    Part Number 12559853 (1997-98) 12559853 (1999-00) 12564241 (2001-03)

    Stock LS6 Heads
    Chamber 64.45 cc 0.100 0.200 0.300 0.400 0.500 0.550 0.600
    Intake 210 cc 62 126 184 224 251 256 257
    Exhaust 75 cc 57 108 143 163 176 180 183
    Valve Diameter Intake 2.00"
    Valve Diameter Exhaust 1.55"
    Part Number 12564243 (2001 +)
    LS6 valves are 0.6mm or 0.023622" longer, hollow stem intake, and hollow stem sodium filled exhaust valves.

    LS6: intake = 73 grams, exhaust = 65 grams
    LS1: intake = 101 grams, exhaust = 94 grams.

    Intake Manifolds
    Part # Engine Plenum Volume Runner Volume Runner Length
    12556333 1997-2000 LS1 5.06 L 0.536 L 262 mm
    12561182 2001-2002 LS1/6 5.19 L 0.541 L 262 mm
    12573572 2002+ LS1/6 5.19 L 0.541 L 262 mm
    ?? LQ4 4.0L 0.541 L 263 mm

    Throttle Body Information:
    A 98-99 TB has a brown spring on it and a smaller throttle cam, GM Part# 17113390.

    A 2000-2002 TB has a blue spring on it and it has the biggest throttle cam, GM Part# 17113647.

    A Truck TB has a orange spring on it and a cam that is close to the 98-99 F-body ones but it's not an exact fit.

    In short when looking for swapping throttle bodies from one car to another check the color of the spring.
    General Specifications
    Displacement 5.7L (5665cc, 346ci) Gross Horsepower 310 @ 5200 RPM, 320 @ 5800 RPM
    Bore/Stroke 3.90/3.62 Gross Torque 340 @ 4000 RPM, 330 @ 4400 RPM
    Compression Ratio10.1:1 Maximum RPM 6200
    Firing Order 1-8-7-2-6-5-4-3
    Out of crate weight. Approximately 390 lbs.
    Spark Plug ACDelco 12 ACDelco 41-985 Spark Plug Gap .060, 1.524 mm

    Block Specifications
    Block Material 319-T5 Aluminum Block Description 90 V, Deep skirt with cast-in iron sleeves.
    Bore Spacing 4.40 Deck Height 9.24
    Main Bearings 5 Thurst Bearing Center Bulkhead Bearing Caps 4 vertical bolts, 2 cross bolts


    Cylinder Head Specifications
    Material 356-T6 Aluminum
    Description Cross flow, wedge combustion chamber.
    Ports Symmetrical, intake and exhaust Chamber Volume 67.3 cc
    Head Gasket 0.052 compressed


    Crankshaft Specifications
    Material Cast Nodular Iron Features Undercut and rolled fillets.
    Crank Pin Diameter 2.10 Main Bearing Diameter 2.56

    Piston Specifications
    Material Cast Aluminum Description Strutless, flat top.
    Compression Ht. 1.34 Weight 15.5 oz.

    Induction System
    Manifold One-piece composite. Throttle Body 75.0 mm bore dia.

  2. #2
    GM made me do it!! IT_SS's Avatar
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    very useful information, it puts the after market parts in perspective, thanx

  3. #3
    Still The Junior Member RedVertTA's Avatar
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    This is useful, deserves to be a sticky. Thanks a lot.
    FAST 90/90, SLP Lid, Kooks JetHot Coated LT's, American Racing Y-Pipe+Magnaflow Cats, DHM Electric Cutout, Flowmaster American Thunder Catback, HP Tuners Software, 343 rwhp.

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    Firebird Encyclopedia 9T8W66's Avatar
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    Usefull but alot of that is common knowledge to anyone who has been around these cars long enough.
    BTW off the top of my head the 6.0 heads listed don't have a port volume but they are identical to LS6 heads except for the chambers. (210/75)
    And the `98-00 F-body cam is incorrect it should be
    198/209 .500/.500 119.5 LSA
    More cams not listed
    Corvette cam `97-99
    199/207 .472/.479 117 LSA
    Corvette cam `00
    198/209 .500/.500 115.5 LSA
    Last edited by 9T8W66; 01-31-2009 at 04:01 AM.
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  5. #5
    Member hoss 2000 z-28's Avatar
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    Monterey Maroon Metalic
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    ^Good call on the errors. They might fix their page if you emailed them about the discrepancy. We still get lots of new members every day so this thread is oriented more towards them and those of us who just want to know what GM sold to us.

    I wouldn't have thought that the early LS1 F Body cam had more lift than the '97-'99 Y Body.

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