I can respect an opinion that has statements like yours behind it. Nothing to disagree with stated up there. In the V8 world, big cranks, big rods, lots of heft cycling around inside those engines also though, a heavier piston is no biggie I'd think. Anything to reduce the vibration of my CR, like a lower weight piston, I'm all for. I'm not gonna race my CR either.abrracing wrote: Instead of getting into a long heated battle about forged vs cast I'll tell you what I know from first hand experience from being in drag racing and motorcycles for the majority of my life.. I worked in speed shops where we built race engines for drag and circle track applications..
Cast pistons would last depending on brand and power level of the engine.. Cast were used in lower class engines like street stock that were basically very mild small block chevies.. You would never see a modified dirt engine with cast pistons lol it wouldn't survive one night of racing turning at 7000+ rpm and 600hp+
Forged pistons would easily last the WHOLE season then alot of the circle track guys would sell their set of JE pistons to some street/strip guys for a fraction of the cost and they would run them for a long time.
The reason factory uses cast pistons is because a factory engine has tight tolerances.. they would be risking it using forged pistons because of this.. the average person purchasing a dirtbike doesn't understand to properly warm up the engine before taking off like a bat out of hell.. if the machine work is correct and the clearances are right and the engine is tuned and running correctly ( no detonation) cast pistons will work just fine, of course depending on power level.. But if the cylinder is a little on the loose side it's a risk running cast because they DO NOT like piston slap.. cast will shatter from this.. forged pistons won't, not to mention the strength in forged pistons is greater.. they can handle heat, vibration and rpm and detonation more than than cast.. You will get more hours on a forged piston than you will on a cast.. forged pistons are more reliable to the least experienced tuner, they're more forgiving..
If i missed on something I apologize, im running late for work, i have to get to our shop and finish a customers MX with a brand new wiseco Pro Lite
Anybody seen actual weights posted for CR500 pistons? Curious how much heavier a wiseco would be then say a vertex or OEM etc.
And thanks for adding in some convo on the thread ...