FireHead Posted March 6, 2007 Report Posted March 6, 2007 So, as you say, cast piston = better pistons for near stock engine, forged piston for modified engine...but as i seen far WISECO SUCK IN EVERY ENGINE I SAW...lol i'm not the type of guy to say something suck before i saw it many time so it isn't a coincidence...everytime i saw a guys with wiseco piston he blew up his engine.But PERHAPS its only wiseco, anyone try other forged piston that were great and without too much trouble?One of my friend had a suzuki lt-250(HEAVY ENGINE MODS) he was alway running on wiseco, every 4-5 month he blowed his engine, he tried pro-x pistons , he did 4 a tire smoke show(excuse my english i'm french i i don't know how to say it)flames were going of his pipes every times, his pipe was red near the exit every time, he jam his pistons into the cylinder because he was running straight pipe later(yes he's crazy) he disasemble the engine put some oil in it and de-jam it...believe me or not there was only a little scratch in the cylinder, this is a story of this summer, he's still running with his pro-x and he's fine and havent re-bore it, he haven't got a single engine trouble since.I think pistons preference really depends on the guys. For my parts when i'l blow my engine(wich is really near,i'm at 100 psi)i will put pro-x or namura into it.All my friend try them and they werent having trouble with them. I would like to reiterate that if you had Jethro (or Billy-Bob) from the local machine shop bore your cylinders with his worn out boring bar on a drill press, then whatever result you had with whatever piston brand you purchased probably doesn't count towards a valid opinion. Quote
Banchetta Posted March 6, 2007 Report Posted March 6, 2007 No doubt, a lot of combinations and problems can arise to a blown piston, etc. Not even being the pistons fault...saying that, I've found that the cast pistons are just more tolerable to cold siezures, poor jetting, and hard abuse w/ the average hp....If I built motors for a living, I'd definately use cast...Just because the normal rider just won't take the time to warm the motor up slowly, jet it perfectly, use the right oil ratios, and keep the filter clean....I just came back from Glamis w/ 75 other people..the first night we got there, most everyone just pulled their quads out of the trailers and beat the hell out of them w/o warming up....I just shake my head knowing that over 75% of them are most likely using forged pistons...That one mistake just cost them compression lost...Do that about 10 times, and they will be down over 10-15 psi or more.....the more wear, the more of a chance of snapping a ring and scored cylinder....this is the main reason why I suggest cast.....Forged pistons are more for people who really take time and care in the motor and treat it delicately. Not to say you can't beat them. My 4mil will tell otherwise. Just knowledge and maintenance will go a long way... Quote
FireHead Posted March 6, 2007 Report Posted March 6, 2007 No doubt, a lot of combinations and problems can arise to a blown piston, etc. Not even being the pistons fault...saying that, I've found that the cast pistons are just more tolerable to cold siezures, poor jetting, and hard abuse w/ the average hp....If I built motors for a living, I'd definately use cast...Just because the normal rider just won't take the time to warm the motor up slowly, jet it perfectly, use the right oil ratios, and keep the filter clean. Just knowledge and maintenance will go a long way... I think I am goin to agree with you on those points assuming stock cylinders are invovlved. I feel that alot of people that have opinions on piston construction have been the victim of poor machine work and practices for better or worse. It's not just on this site, or with just motorcycle engines, it's everywhere. :thumbsup: Quote
Kama Posted March 6, 2007 Report Posted March 6, 2007 ill second that... I'll third that. Not me, I'll take an oem or a pro-x anyday over a wiseco....I seem to be in the minority on this one. I like forged pistons in 4 strokes, but prefer cast in two strokes. I'm not the only one with this opinion either, some very reputable engine builders tend to agree. I've used cast and forged and ever cast piston I have had has lost the skirt within 10 hours of use. I switched back over to a wiseco, and its ran perfect ever since. When in doubt, go with a trusted brand like wiseco. Quote
Bansh-eman Posted March 6, 2007 Report Posted March 6, 2007 WISECO SUCK IN EVERY ENGINE I SAW id have to say this is one of the stuipest straight foward statments made... you cant say that one specific brand sucks in every motor you saw... you mean to tell me that you have never seen any weisco pistons not break? im sorry brother but im pulling the bullshit flag on that one... the only piston i can hands down say isnt worth getting is the vitos super stock... for the fact that the exhaust side being cut has hung on a several guys and ruined their motors...but thats not because its cast or forged thats because the cuts made on the pistons... weisco is a proven company like it or not... they have been around and have been proven on many differant applicatons on and off the tracks... from go karts to dirt bike and into hotrods... thing is like Banchetta said you have to take better care of them... knowing they need more time to break in and heat up before ripping off to ride... its as simple as starting your bike and letting it idle while you get dressed... so what the big deal that it takes longer to warm up? having a pistion that holds up to higher rpms that takes a little longer to warm up to ride on is well worth it in my book Quote
RNBRAD Posted March 6, 2007 Report Posted March 6, 2007 I agree. RNBRAD always has the best neutral, informational, links to add to most discussions. :thumbsup: RNBRAD I want to apologize to you if I came off like a twat when I replied to your post. I got a little bit worked up at blaster 668 and I think I let it carry over into my reply to your post. :shoothead: Not a problem at all, we all like to express our opinions and really no one is wrong here. One thing though is so many factors and variables are involved to make a motor run properly. When a motor is not running right, pistons are usually the 1st thing to go. They undoubtedly get blamed when the problem lies elsewhere. Wiseco and Pro-x are 2 of the best aftermarket piston manufacturers in the business, BUT I feel there is a time to use forged over cast, just as there comes a time to use a lockout clutch. You wouldn't want to use a lockout on a stock banshee though. You have to weigh advantages and disadvantages with everything. :beer: Quote
2003LimitedBanshee Posted March 6, 2007 Report Posted March 6, 2007 So after reading the posts I have to wonder where the general opinions fall as far as the break over point for switching to a forged piston such as Wiseco. I've always heard nothing but good about Wiseco and was planning/recommended to run them in my bike once I finish porting my cylinders, but now I'm wondering. Where are our resident builders to weigh in on this? Are we talking cast on unported (ie. lowere RPM capability) bikes and forged on ported (higher RPM/strung) bikes??? Quote
FireHead Posted March 6, 2007 Report Posted March 6, 2007 So after reading the posts I have to wonder where the general opinions fall as far as the break over point for switching to a forged piston such as Wiseco. I've always heard nothing but good about Wiseco and was planning/recommended to run them in my bike once I finish porting my cylinders, but now I'm wondering. Where are our resident builders to weigh in on this? Are we talking cast on unported (ie. lowere RPM capability) bikes and forged on ported (higher RPM/strung) bikes??? With all that has been said on this topic in this thread (some of it by me), the reality for me is that if I am going to put a two stroke motorcycle, ATV, snowmobile, jetski motor togther, I am going to put Wiseco forged pistons in it without giving it any thought. The caveat here is that I either do my own machine work or have it done by someone who I can visually confirm knows what they are doing and can do the work properly. A four stroke would be a bit different scenario as there or more available vendors out there besides Wiseco (JE, CP, Mahle, etc.) that offer a variety of different piston designs for different applications. In that case, they are all good company's and I am probably going to use whatever piston somebody is going to give me for free as long as it fits my application. I would be interested in what Jeff or one of the other folks has to say on this topic as well. :thumbsup: Quote
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