Conversation Between andrew69_04 and streSS

the builder/dyno assumed they were bleeding off under hard acceleration acusing a loss in lift killing our power. That's about all we could figure

What was wrong with the lifters? They collapsed and weren't pumping up

Yes. The motor sounded/ran great, and was fun to drive since it was in a sprint car! We didn't realize we had an issue until we got it on the dyno and it was a big shock to us. We had never suspected the lifters, as i've never ran into that before, but after trying a few things, swapping them out made all the difference in our case

Hello Andrew, you commented on my under performing ls1 stating your lifters were bad. How did the car run prior to figuring out the problem. Did it run smooth just didn't have the #s