Cam for 350 tbi1/22/2024 ![]() ![]() So even if the lift is the same as the L98 cam, I simply can't believe the duration specs are the same. I know you measured the lift with a micrometer Paul, and I have to believe you know what you're doing. ![]() LEVEL1 is stock cam which is 165/175 duration. Obviously the intake design has a great influence on this. I am going to list as 5 different levels of camshaft that you can run with TBI. On the other hand, the L98 was known for torquey low end performance with an unimpressive top end. ![]() That's the only explanation I can think of that makes any sense at all. Maybe GM installed it "degreed" advanced/retarded in the direction that would essentially have the effect of reducing the duration. It doesn't idle, or drive like a cam with those specs. And a cam that has this much more duration than the original "peanut" cam (let alone the b-body LT1 cam) somehow makes only 10-25 more HP in the 9C1 L05 than the civilian L05. I still don't understand why GM would have put this cam into an L05. Given this fact, the L05 9C1 should have a peak torque rpm higher than the b-body LT1. Even if the lift is similar, the duration will shift the torque band up the rpm scale. 21K views 26 replies 8 participants last post by dt5150 Sep 28, 2009. The L98 cam has quite a bit more duration than the LT1 B-body cam. SBC 350 with a cam, TBI, not running right. ![]()
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