I don't doubt you one bit that the rod bearings might be soft, but I highly doubt it is as critical as you make it sound. More people suffered from fuel starvation/clutch,ps,brake fade than rod bearings failure. I am guessing 50 cars on this forum had gone to the track more than once, the failure rate is less than 5 cars?!? I will take that odd anytime.
threeseventy, mine might fail, but it hasn't after 2000+ miles on the track and 500 autocross runs. I will keep going back at it unless something proves otherwise. I have never hit things at the track either, but it doesn't mean I won't. I hope it doesn't happen, but you don't know.
You guys with modified cars/engines have different requirements than the guys with stock cars. What's to say the failure was caused by the rod bearing and not your mods or tunes. Track conditions are rough on the engines, but most modern cars are smart enough to prevent itself from blowing up.
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Originally Posted by clintfocus
But if you dont believe me and feel 250+ oil temps is ok for your engine on track, then go right ahead. i honestly dont know, i havent gone around and counted blown from oiling issue 370z's, im just stating that it is a fact, VQ's have rod bearings on the soft side of metal compound making them eager to fail and spin at oil temps past 250.
also, he's not saying tune for 100, he's saying mix some 100 with your 91 to bring your effetive octane rating up higher then whatever octane you are tuned for, since track conditions always run harsher and hotter then any dyno can replicate. its cheap insurance against possible detonation. and your power will stay more consistant through out the day
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Quote:
Originally Posted by threeseventy
Mine did. Yours could. More would if this place wasn't a haven for hardparkers.
I said tune for 95. At least add some 100. There is 91 and 100 at the pump at all of our tracks. Helps a lot with these hot-running motherf*cking VQ's that we love.
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