the GM hot cam was and is designed to give the MAX performance that can be added to a STOCK LT1 or roller lifter & cam upgraded L98 engine without causing ANY clearance or performance issues,
yes you can very slightly exceed the specs but youll usually find it requires other matching mods to function correctly.
http://www.gmhightechperformance.com/te ... index.html
125517051 Hyd. Roller 201/208 .447"/.459" 10.4:1 112 '95 to '96 Gen. 11 LT1 350, w/center dowel pin
12551142 Hyd. Roller 203/210 .476"/.480" 10.8:1 115.5 '96 350 LT4 w/1.6:1 roller rockers
24502586 Hyd. Roller 218/228 .525"/.525" 10.8:1 - '96 LT4 H.O.T crate motor cam, use
GM Hot Cam w/ LS6 springs LSA 112, 218/227 Duration, 525/525 Lift
heres the LT1.LT4 ad HOT CAM INFO (ABOVE) and flow data (BELOW)
http://www.malcams.com/legacy/misc/headflow.htm
http://corvetteactioncenter.com/specs/c ... ology.html
HERES THE HOT CAM INFO
12480002 Hot Cam Kit (LT4)
This off-highway camshaft kit has the major valve train component to convert production LT1 engine for showroom stock racing, or hop up your small block Chevrolet V8 that was originally equipped with a roller tappet camshaft. The 1.6 roller rockers, light weight valve spring caps, special designed valve springs and hot camshaft offers a significant gain in horsepower at a reasonable price. This kit includes the following items: one camshaft P/N 24502586, 16 roller rocker arms kit P/N 12370839, 16 valve springs P/N 12551483, 16 valve caps P/N 10212808, 16 valve keys P/N 24503856, 16 valve spring shims P/N 10212809.
Technical Notes: This kit does not include roller tappets. If your engine already has roller lifters, you can use them with this kit, but always check for wear and replace if needed before installing this kit. If you are building an engine from a bare block, you can use the roller lifter kit P/N 12371042.
Special Note For ZZ4 Owners: This kit is worth 40HP more when installed in a ZZ4 which will boost the horsepower from 355 to 395, but the ZZ4 comes with the most of the LT4 HOT Cam Kit components already installed. The camshaft and lifters are all that are needed to complete the LT4 Hot Cam conversion on the ZZ4. The ZZ3 and prior versions of the ZZ4 will require the complete kit for the upgrade. "
info on the valve spring and cam install
http://home.comcast.net/~nstama/rocker_roller_install.htm
heres a list of the parts in the hot cam kit
This kit includes the following items:
One camshaft P/N 809-24502586
16 roller rocker arms kit P/N 809-12370839
16 valve springs P/N 809-12551483
16 valve caps P/N 809-10212808
16 valve keys P/N 809-24503856
16 valve spring shims P/N 809-10212809
ID STRONGLY ADVISE YOU READ THRU THIS THREAD AND ITS SUB LINKS ALSO
viewtopic.php?f=52&t=994
T.P.I.S.
http://www.tpis.com/index.php?module=ca ... lic+Roller
also sells their version of the hot cam.(roller cam)
its a bit milder to work better with the stock auto trans converters , and if your engines basically stock other than the cam upgrade its probably a better selection in an LT1
if you've got a stock auto trans , this might be a better chioice
ZZ-9 Hydraulic Roller:
Intake Exhaust This is an emission legal cam which makes
Advertised Duration 282/ 287 over 400HP with our CNC"D LT heads and
Duration at .050 212 /226 F-car headers. Great with an auto or six
Gross Lift .483/.520 speed.
Lobe Separation 112
IF you've got a manual transmission and a 3.54:1 or 3.73:1 rear gear ID go this route on a basically stock LT4, looking for more hp.
ZZ-409 Hyd Roller:
This is the next step up great cam for a stick car
Advertised Duration 287/287
Duration @.050 226/226
Gross Lift .520/.520
Lobe Separation 112
these last two could only be used effectively in a modified engine
ZZ-9X Hyd Roller:
Advertised Duration 287/290 This cam will make 30 more HP than the ZZ-409
Duration @.050 225/240
Gross Lift .525/.558
Lobe Seperation 112
ZZ-X Hyd Roller:
Advertised Duration 290/290 This is the big dog 548HP 409 cid in my street rod
Duration @.050 239/239
Gross Lift .558/.558
Lobe Seperation 112
These last three cams (BOTH ABOVE AND BELOW)do not work with factory springs.
Please see our spring section for proper application.
HERES TWO CAMS (below)THAT WORK GREAT IN A HIGH COMPRESSION 383-406 with the correct matched components, but they will be nothing but problems in a basically stock combo
AGGRESSIVE
http://www.cranecams.com/?show=browsePa ... vl=2&prt=5
MORE AGGRESSIVE
http://www.crower.com/misc/cam_spec/cam ... &x=37&y=13
BEST USED ON A RACE ONLY COMBO
http://www.cranecams.com/?show=browsePa ... vl=2&prt=5
most guys use the terms almost interchangeably WHICH THEY ARE NOT in all cases!
LCA =(LOBE CENTER ANGLES)remember lobe center angles can be changed thru indexing the cam when degreeing it in, LSA (LOBE SEPARATION ANGLE) is ground into the cam during its manufacturing process, and a wider LSA on a cam of equal duration tends to idle smoother
yes you can very slightly exceed the specs but youll usually find it requires other matching mods to function correctly.
http://www.gmhightechperformance.com/te ... index.html
125517051 Hyd. Roller 201/208 .447"/.459" 10.4:1 112 '95 to '96 Gen. 11 LT1 350, w/center dowel pin
12551142 Hyd. Roller 203/210 .476"/.480" 10.8:1 115.5 '96 350 LT4 w/1.6:1 roller rockers
24502586 Hyd. Roller 218/228 .525"/.525" 10.8:1 - '96 LT4 H.O.T crate motor cam, use
GM Hot Cam w/ LS6 springs LSA 112, 218/227 Duration, 525/525 Lift
heres the LT1.LT4 ad HOT CAM INFO (ABOVE) and flow data (BELOW)
http://www.malcams.com/legacy/misc/headflow.htm
http://corvetteactioncenter.com/specs/c ... ology.html
HERES THE HOT CAM INFO
12480002 Hot Cam Kit (LT4)
This off-highway camshaft kit has the major valve train component to convert production LT1 engine for showroom stock racing, or hop up your small block Chevrolet V8 that was originally equipped with a roller tappet camshaft. The 1.6 roller rockers, light weight valve spring caps, special designed valve springs and hot camshaft offers a significant gain in horsepower at a reasonable price. This kit includes the following items: one camshaft P/N 24502586, 16 roller rocker arms kit P/N 12370839, 16 valve springs P/N 12551483, 16 valve caps P/N 10212808, 16 valve keys P/N 24503856, 16 valve spring shims P/N 10212809.
Technical Notes: This kit does not include roller tappets. If your engine already has roller lifters, you can use them with this kit, but always check for wear and replace if needed before installing this kit. If you are building an engine from a bare block, you can use the roller lifter kit P/N 12371042.
Special Note For ZZ4 Owners: This kit is worth 40HP more when installed in a ZZ4 which will boost the horsepower from 355 to 395, but the ZZ4 comes with the most of the LT4 HOT Cam Kit components already installed. The camshaft and lifters are all that are needed to complete the LT4 Hot Cam conversion on the ZZ4. The ZZ3 and prior versions of the ZZ4 will require the complete kit for the upgrade. "
info on the valve spring and cam install
http://home.comcast.net/~nstama/rocker_roller_install.htm
heres a list of the parts in the hot cam kit
This kit includes the following items:
One camshaft P/N 809-24502586
16 roller rocker arms kit P/N 809-12370839
16 valve springs P/N 809-12551483
16 valve caps P/N 809-10212808
16 valve keys P/N 809-24503856
16 valve spring shims P/N 809-10212809
ID STRONGLY ADVISE YOU READ THRU THIS THREAD AND ITS SUB LINKS ALSO
viewtopic.php?f=52&t=994
T.P.I.S.
http://www.tpis.com/index.php?module=ca ... lic+Roller
also sells their version of the hot cam.(roller cam)
its a bit milder to work better with the stock auto trans converters , and if your engines basically stock other than the cam upgrade its probably a better selection in an LT1
if you've got a stock auto trans , this might be a better chioice
ZZ-9 Hydraulic Roller:
Intake Exhaust This is an emission legal cam which makes
Advertised Duration 282/ 287 over 400HP with our CNC"D LT heads and
Duration at .050 212 /226 F-car headers. Great with an auto or six
Gross Lift .483/.520 speed.
Lobe Separation 112
IF you've got a manual transmission and a 3.54:1 or 3.73:1 rear gear ID go this route on a basically stock LT4, looking for more hp.
ZZ-409 Hyd Roller:
This is the next step up great cam for a stick car
Advertised Duration 287/287
Duration @.050 226/226
Gross Lift .520/.520
Lobe Separation 112
these last two could only be used effectively in a modified engine
ZZ-9X Hyd Roller:
Advertised Duration 287/290 This cam will make 30 more HP than the ZZ-409
Duration @.050 225/240
Gross Lift .525/.558
Lobe Seperation 112
ZZ-X Hyd Roller:
Advertised Duration 290/290 This is the big dog 548HP 409 cid in my street rod
Duration @.050 239/239
Gross Lift .558/.558
Lobe Seperation 112
These last three cams (BOTH ABOVE AND BELOW)do not work with factory springs.
Please see our spring section for proper application.
HERES TWO CAMS (below)THAT WORK GREAT IN A HIGH COMPRESSION 383-406 with the correct matched components, but they will be nothing but problems in a basically stock combo
AGGRESSIVE
http://www.cranecams.com/?show=browsePa ... vl=2&prt=5
MORE AGGRESSIVE
http://www.crower.com/misc/cam_spec/cam ... &x=37&y=13
BEST USED ON A RACE ONLY COMBO
http://www.cranecams.com/?show=browsePa ... vl=2&prt=5
most guys use the terms almost interchangeably WHICH THEY ARE NOT in all cases!
LCA =(LOBE CENTER ANGLES)remember lobe center angles can be changed thru indexing the cam when degreeing it in, LSA (LOBE SEPARATION ANGLE) is ground into the cam during its manufacturing process, and a wider LSA on a cam of equal duration tends to idle smoother
