Car lost power, knocking after dyno
#25
Staging Lane
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I agree, it clearly broke on the dyno as it did nothing but lost power.
What is your opinion on a spun brg, and the motor falling on its face at 5,800 rpms? Would that make since, or was something else wrong with the motor do you think?
Any way that me camming it "incorrectly" could cause the spun bearing, or since I had a very tough valve train, the next weakest link in the motor would have been the brg on over rev? I read everywhere that a lack of oil is a big cause to spinning bearings, I would be at 60 psi on start up, and never drop below 40 warm with the ported ls6 from tsp. Just want opinions, this was my first ever motor "build" if you would call it that.
#26
Staging Lane
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Thanks man! I ended up pulling the covers, and the valve train looks brand new, as I would expect for 400 miles, ha! Still no time to pull the pan, but I will get around to it sometime and will be back on this thread to let everyone know what I find.
#27
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"I agree, it clearly broke on the dyno as it did nothing but lost power.
What is your opinion on a spun brg, and the motor falling on its face at 5,800 rpms?"
Look at the data log from the dyno.
Could have well been the knock setting off spark retard = power drop.
What is your opinion on a spun brg, and the motor falling on its face at 5,800 rpms?"
Look at the data log from the dyno.
Could have well been the knock setting off spark retard = power drop.
#32
Oh my. Why oh why did you drive it 180 miles untuned? After a cam install you have to trailer it to your tuners unless you have the means to load a tune or send the computer out. We just did a cam upgrade on my sons 98 and didn't even like running it to load it on the trailer.
Time to tear down top end and remove oil pan. Keep us posted.
Time to tear down top end and remove oil pan. Keep us posted.
The trims will correct back. A cam makes you richer at part throttle (low map) and leaner at higher map areas, which won't matter as long as you stay out of them.