Quote:
Originally Posted by Gforce
I'm not saying how I know this but I happen to know this engine stays in one piece at 8,000 rpm on a mistaken downshift from fifth to second gear, at least if you are half awake and don't let the clutch in all the way before the scream from the engine tips you off. Just btw, these are strong engines and you cannot have dropped a valve so no worries there. It takes a fair bit of valve spring float to hit a valve, and valve float is not very common in modern engines due to very tight timing gear needed for precise remission controls. The highest strain on a streetable engine occurs at TDC at the end of the exhaust stroke. That's when the piston gudgeon or less often the con rod bearing takes the biggest load. No compression or power pressure holding the piston down is the reason.
The other tip I have is "so what"? If the engine runs, pulls strong and is not making unusual noises just drive it until you find out whether you broke it or not. If it is broken you will be taking the whole engine apart anyway, there is nothing you can do that will change this now.
Do NOT take it to a dealer because they will tell you it's broken.
You could slap a Supercharger on to check if it still holds together , like I did. If it breaks I will rebuild with stronger rods.
Seriously, if you overrev an engine by missing a shift like that you wouldn't need to be asking if the engine broke or not, it would be obvious.
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Thanks for that in depth explanation! I figured after 100km i got extremely lucky since it's still running. The clutch feels a little retarded when shifting but that could just be me still getting used to the high bite point..
And for all those wondering, I just floored it...... Still put the same smile on my face as it did the first time I stepped on it
In defence to everyone else that is a part of the Money shift club, I can attest I was not doing anything else when it happened. I just wasn't used to being aggressive with the FRS's transmission and shifter throw/spacing. Plus i'll admit I got a little excited by the pull I was about to experience dropping it to fourth at 125km/hr
Regardless, I appreciate all of your guys' help and advice. Saved me a couple hundred dollars and lost sleep!