Bad night at the track
It was obviously detonating pretty bad on all cylinders in the picture. Without knowing the actual tune, fuel pressure, whether the water/meth was actually spraying, etc., we can only speculate as to the cause of the severe detonation.
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How can u tell it was detonating in all cylinders? The only thing that changed is he bought a 2 step but I guess he didn't use it at the track , but he was messing around with it on the street the day before
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From: Bostwick, GA.
" he bought a 2 step but I guess he didn't use it at the track , but he was messing around with it on the street the day before".
Way too much info missing to make much more than this being a possibility.
Way too much info missing to make much more than this being a possibility.
Depends on how it was tuned.
For example, I bought my buddies car who had it dyno tuned, ran great, no issues.
When I made a full pull thru all the gears say 20-150mph I realized there are a lot of issues that will pop up that don't on the dyno.
Fuel pressure dropped off, threw the belt off, boost controller referenced incorrectly, several problems popped up which never happened to him because it was only ever run for a few seconds at WOT on the dyno.
Post the tune for starters, describe the engine combination, describe the current fuel system, W/M content, when does it come on.
Willing to bet timing was greedy or fuel pressure dropped off at the top end.
Assuming this is on a Holley system, no safeties were in place?
For example, I bought my buddies car who had it dyno tuned, ran great, no issues.
When I made a full pull thru all the gears say 20-150mph I realized there are a lot of issues that will pop up that don't on the dyno.
Fuel pressure dropped off, threw the belt off, boost controller referenced incorrectly, several problems popped up which never happened to him because it was only ever run for a few seconds at WOT on the dyno.
Post the tune for starters, describe the engine combination, describe the current fuel system, W/M content, when does it come on.
Willing to bet timing was greedy or fuel pressure dropped off at the top end.
Assuming this is on a Holley system, no safeties were in place?
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Maybe it is just the way the pic looks on my screen, but that looks like a lot of speckles and pitting all over the combustion chambers and valves. I don't see any of the melting you would get with pre-ignition, so it looks like detonation to me.
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