Skip the wiseco pistons, junk. They swell so damn bad that cold they end up knocking around until they come up to temp. Same thing with the stuff I used in a motocross bike a few times. Never again. CP pistons now.

 

Skip the wiseco pistons, junk. They swell so damn bad that cold they end up knocking around until they come up to temp.



People use Wiseco ALL THE TIME and dont have piston slap, if the motor is setup properly with the correct piston-to-wall clearence they will be fine, Like Camuman said in a different topic, you come into everyone's post trying to help out, and i agree with some of the information you post, but alot of it i need to grab my boots and try to find way my thru all the bullshit. You clearly have expirience in the world of go fast parts/cars, but your expirirence doesnt become the gospel.

YOU CAN RUN WISECO PISTONS JUST FINE....YOU CAN RUN A MOTOR WITHOUT OIL SQUIRTERS....YOU CAN USE THINGS OTHER THAN A LOG MANIFOLD FOR SUB 500WHP AND HAVE A GOOD POWERBAND AND NOT NUKE A MOTOR FROM HEAT!!!

just because you think one thing doesnt, mean everyone else is wrong, i have been on this site for a while, and althought my post count is no where near yours, it doesnt mean i dont have real life knowledge and expirience. I love this forum because of the community and the knowledge, not the regurgitated BS you find on honda tech.

Please continue to post and shed light on the topics at hand, but dont be-little everyone that crosses your opinion....

 

We use all sorts of brand pistons including WISECO and everything from Federal to Mahle and we never encountered noisy pistons or piston slap, only if another shop did the machining.
We build on average 50+ engines per year

 

How many Wiseco piston motors have you had? I've had probably 30-40 engines with wiseco pistons in them that I personally ran, I'm not one to preach that they fail but they do swell far more than say a CP piston in comparison. In my motocross bike motors I don't mind this as they are warmed up every time so I'm fine with using them but at cold the sound is quite audible, same in other applications. I never said my experience is the gospel but I can apply logic and experience to equations and tell you what is a good idea and not.

I never said you can't run Wiseco pistons. I never said you can't run a motor without oil squirters. I never said you can't run without a log manifold. SO PLEASE STOP PUTTING WORDS IN MY MOUTH.

Just because people are wrong, it's not my fault. I never said you don't have real life knowledge/experience.

I don't think I'm be-littling anyone, out of all my posts it's really just the last couple people that have had a complaint and that's out of a lot of posts. Honestly, people say something and I point out that the logic behind it is simply dead wrong or flawed and they get upset about it due to pride. That's not my fault/problem to work around. If you take time to search through my posts/topics you'll never see me attack a person directly, rather they make a personal attack on me first and then at that time I may defend myself more aggressively.

I appreciate your more fair approach to the matter at least though.

 

I build just five or so motors a year, nowhere near 50, so I'll bow kindly to that fact.

I've put a Wiseco in the same cylinder as a CP and seen slap go away, same size piston. How else would you explain that? It wasn't a oval worn cylinder or anything like that either, brand new setup and slap occurs, swap pistons and it's gone..... I've seen this on multiple occasions.

Now don't get me wrong, the slap isn't horrible but it's audible, I've got a CR250 in the garage right now with a new top end and a wiseco in it and it'll slap around for 30 seconds before it stops. Granted 30 seconds isn't very long but still you have to figure that just because the sound stops it's probably still undersized for another 30-60 seconds on top of that. I don't ever run a motocross bike until it's fully warmed up so it's just fine. The piston size is correct. What else would you think in that situation???

I'm not out to bash Wiseco, I've used the product repeatedly so please don't think I'm biased against them but I look at this as a fact of life when running their products. Once warm they're fine, lighter than stock and hold up just fine.

I won't be putting them in a car that is anything but a race car. I don't want to sit around in my S2K for a couple minutes before I feel good about just driving away. I have noted the slapping sound is quieter in car motors, not sure to chaulk that up to car motors having more mass to shut it up or if their dirtbike/streetbike pistons swell more due to a manufacturing/engineering reason.

Here's the bottom line for me, why bother down that road when you can just choose a CP instead? Seems silly. Thus I'm done with Wiseco in those applications.

-Greg

 

Hey Greg, Well when I'm done with this engine build and my pistons are starting to make noise, you will be the first to know and I will be the first to say that I was wrong. we might share different experiences and therefore have different opinions but we shall see, how this will turn out. Brian

 

 

I love to say "I told ya so", just give me half a chance to do it!

Honestly I hope it doesn't do it, it's obnoxious and makes me feel uneasy to hear a motor do it though at idle probably does minimal damage. Hopefully you have better luck (or talent) than I in the matter.

 

Patience, I'm proved wrong often enough but I won't get angry about it as others in this forum seem to. You'll have a chance to witness it occur if you hang around long enough. Honestly man, there's a lot of dummies on this forum and they don't take well to finding out they're incorrect.

 

Thank you man sorry to say it but there absolutely nothing wrong with wiesco pistons, all built motors will have some sort of piston slap but if built correctly it will be minimized. My motor runs Wiesco's aswell as passman who's basically running the highest street driven s2000 the man who recommended them builds 1000hp supra motors daily with these parts please stop spreading bull**** hearsay