LT4 Hotcam help plz
01-22-2008, 09:06 PM
#1
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LT4 Hotcam help plz
I have a LT4 hot cam i need little help with plz it has some numbers on the end and need to know what they are if someone would plz help me that would be great i bought about month ago and now starting tear down and want to know if this really is hot cam well someone plz help thanxs
01-23-2008, 03:01 AM
#5
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Im suprised no one has posted up on this yet, so heres a TTT for ya.
If you have a camshaft degreeing kit, which you absolutely should buy before installing a cam anyways, you could measure out your specs to see if it is a hot cam.
Look up the max lift for I & E, LSA, and duration for the hot cam. Then when you install it, Spec it out to make sure it matches.
If you have a camshaft degreeing kit, which you absolutely should buy before installing a cam anyways, you could measure out your specs to see if it is a hot cam.
Look up the max lift for I & E, LSA, and duration for the hot cam. Then when you install it, Spec it out to make sure it matches.
01-23-2008, 12:57 PM
#6
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DESCRIPTION: Gen I - SMALL BLOCK HOT CAM KIT
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. See valve lifter section 0.459 for the lifter kit.
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. See valve lifter section 0.459 for the lifter kit.
01-23-2008, 12:59 PM
#7
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DESCRIPTION: LT4 HOT CAMSHAFT
This hydraulic roller cam is for service only for all V8 engines with roller camshafts. The duration at lash point in degrees (intake/exhaust) is 279/287; duration at .050" tappet lift (intake/exhaust) is 218/228; and maximum lift with 1.6 rocker ratio (intake/exhaust) is 525/525. Valve lash is zero/zero and lobe centerline is 112 degrees. Technical Notes: The LT4 camshaft P/N 24502586 was designed to be used in a number of different engines. Therefore, the following change may need to be made to allow for correct assembly of the engine: For LT1 and L98 engines 1995 and before, the dowel pin in the end of the camshaft must be pushed in so extension from end of cam is .30+/-.01", the same as the production part. For 1996 LT1 and LT4 engines, the dowel pin is in the correct position, extending .620" from the end of the camshaft. This camshaft has a fuel pump lobe.
thats abotu all i can come up with at the moment form gmpartsdirect.com. I run a hotcam, and those numbers look familiar, but i dont know if its false recall, from a hotcam. or form a stocker
This hydraulic roller cam is for service only for all V8 engines with roller camshafts. The duration at lash point in degrees (intake/exhaust) is 279/287; duration at .050" tappet lift (intake/exhaust) is 218/228; and maximum lift with 1.6 rocker ratio (intake/exhaust) is 525/525. Valve lash is zero/zero and lobe centerline is 112 degrees. Technical Notes: The LT4 camshaft P/N 24502586 was designed to be used in a number of different engines. Therefore, the following change may need to be made to allow for correct assembly of the engine: For LT1 and L98 engines 1995 and before, the dowel pin in the end of the camshaft must be pushed in so extension from end of cam is .30+/-.01", the same as the production part. For 1996 LT1 and LT4 engines, the dowel pin is in the correct position, extending .620" from the end of the camshaft. This camshaft has a fuel pump lobe.
thats abotu all i can come up with at the moment form gmpartsdirect.com. I run a hotcam, and those numbers look familiar, but i dont know if its false recall, from a hotcam. or form a stocker
01-23-2008, 01:03 PM
#8
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01-23-2008, 06:44 PM
#9
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Ya well it looks just like a hotcam but ya im just paranoid it has only 5,000 miles on it bought it for pretty cheap looks in great condition so ya but hey does anyone have a pic of there end not the dowel pin but other side someone let me know plz thanxs guys
01-23-2008, 07:09 PM
#10
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01-24-2008, 06:43 PM
#13
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Chevyowner2 i dont have any green paint on my does this mean that i dont have a hotcam the guy i bought it from got it from gmpp well let me know bud plz thanxs alot man but let me know if you could send me some pics of it thanxs alot lata man
02-12-2008, 05:52 PM
#15
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Join Date: Apr 2007
Posts: 63
idk if you still have this problem man but heres what i did to figure out mine
get a micrometer and measure the lobe height (top of lobe to bottom of base) then measure the width of the base circle ( side to side)
then subtract the base width from the lobe height and multiply by 1.6 (rocker ratio)
should come out to .525, then you sir have a real hotcam.
get a micrometer and measure the lobe height (top of lobe to bottom of base) then measure the width of the base circle ( side to side)
then subtract the base width from the lobe height and multiply by 1.6 (rocker ratio)
should come out to .525, then you sir have a real hotcam.