HOT cam... valve events timing??
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Le Mans Master
Joined: Oct 2001
Posts: 5,145
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From: The Motor City
HOT cam... valve events timing??
Does anyone have the cam card that goes with the LT4 HOT cam? I'm running Desktop Dyno simulations and I don't think I have the cam events correct. At what time is IVO, IVC, EVO, and EVC?
Thanks.
Thanks.
Team Owner
Joined: Apr 1999
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From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Re: HOT cam... valve events timing?? (Scooter70)
These are all the GM H-rollers. I was told that this last cam is the LT4 hot cam. GM doesn't seem to publish the event numbers
Hydraulic Roller Tappet
This hydraulic roller tappet is used on the 5.7-liter H.O. 350 ZZ3 & 4 engines. The duration at lash point in degrees (intake/exhaust) is 275/280; duration at .050" tappet lift (intake/exhaust) is 208/221; and maximum lift with 1.5:1 rocker ratio (intake/exhaust) is 474/501. Valve lash is zero/zero and lobe centerline is 112 degrees.
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12370845 Hydraulic Roller Design
This hydraulic roller design contains eccentric for mechanical fuel pump. It is for off-road use only. The duration at .050" tappet lift (intake/exhaust) is 214/224; and maximum lift with 1.5:1 rocker ratio (intake/exhaust) is 488/509. Valve lash is zero/zero and lobe centerline is 112 degrees.
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12370846 Hydraulic Roller Design
This hydraulic roller design contains eccentric for mechanical fuel pump. It is for off-road use only. The duration at .050" tappet lift (intake/exhaust) is 222/230; and maximum lift with 1.5:1 rocker ratio (intake/exhaust) is 509/528. Valve lash is zero/zero and lobe centerline is 112 degrees.
Hydraulic Roller Tappet
This hydraulic roller tappet is used on the 5.7-liter H.O. 350 ZZ3 & 4 engines. The duration at lash point in degrees (intake/exhaust) is 275/280; duration at .050" tappet lift (intake/exhaust) is 208/221; and maximum lift with 1.5:1 rocker ratio (intake/exhaust) is 474/501. Valve lash is zero/zero and lobe centerline is 112 degrees.
--------------------------------------------------------------------------------
12370845 Hydraulic Roller Design
This hydraulic roller design contains eccentric for mechanical fuel pump. It is for off-road use only. The duration at .050" tappet lift (intake/exhaust) is 214/224; and maximum lift with 1.5:1 rocker ratio (intake/exhaust) is 488/509. Valve lash is zero/zero and lobe centerline is 112 degrees.
--------------------------------------------------------------------------------
12370846 Hydraulic Roller Design
This hydraulic roller design contains eccentric for mechanical fuel pump. It is for off-road use only. The duration at .050" tappet lift (intake/exhaust) is 222/230; and maximum lift with 1.5:1 rocker ratio (intake/exhaust) is 509/528. Valve lash is zero/zero and lobe centerline is 112 degrees.
