Guys, look at this dyno sheet and tell me if you think the reason power starts to fall of is due to valve float.
Thunder Racing told the owner of the car that the cam he has is done at 6400 based on their experience...and that's what we saw.
But when looking at it...just use the graph to base your opinion.
Is that what valve float would look like? Or would power just level off or fluctuate up and down?
Opinions?

Dyno Sheet

 

Thats what it looks like to me (although I'm not an expert by any means) what springs are you running?

 

In my experience once you pass the RPM for peak power the numbers tend to and can drop quickly. And since you said the cam only makes power to there makes sense than.

 

Valve float would indeed look like that graph.

Rich Krause

 

Well i would love to know what mine is then i was told it was spark being blown out due to stock ignition because my chart looks choppy as hell i mean it doesnt fall off like that it keeps pulling but it is very choppy . I was told its because of the spark being blown out by the supercharger does that make sense i wish i could post pictures i dont have a digital camera sorry but when i had valve float before my new set-up it didnt look like that ...it was very wavy looking and couldnt make power over 5000 rpm so im confused if you had weak springs i dont think you would get that high in the rpm band....

 

OK...cam is an XE 236/242 and is a stock bottom end and Comp 987 dual springs.

 

TTT for Dan.

 

thats normal, XE cams fall off real quick.

 

Wow, back from the dead. Actually I had that car back on the dyno this morning. New springs and comp r lifters....about the same numbers as before.