Engine Failures Thanks to Wiseco
 

Had 2 Super Cat Engine failures last year in J.E.M. Motorsports40 Motion. Both failures were due to Wiseco piston failure. Has anyone come across this same situation. We were sponsored by them and were given free pistons. They were the most expensive free pistons we have ever got.

NO THANKS WISECO!

How did the pistons fail?

I would be curious what failed as well. I use Wiseco as well, Exclusively.

I use them in all my Drag Race motors with a ton of Nitrous (600+ HP worth) and also use them in my boat.

The only problems I have had with them was induced by me. ( Lean Nitrous Tune Up)

I have always found very accurate as far as roundness and sizing and finish.

You mean SIEZE CO!!! In the outboards they are notorious to siezing up in the top of the stroke and having the wrist pin rip out of the bottom or the piston and well you know the rest of what happens

Jon

DITTO what Audio said.

Had them in a stock Merc 200 and also put them in my 91 2.4L Bridgeport, SIEZEco is definietly the best way to describe them.

Well I don't know about 4 stroke situations but in 2 stroke snowmobile applications it is well known NOT to use them. They seem to cold sieze quite often , even when the motor has been properly warmed up.

I agree with what the last 3 just said about "Sieze-co" Ive had numerous problems on the 2-stroke side......the last time being in a snowmobile. I was told all about the "proper" warmup and stuff yet even when its fully warmed up and babied it still went and riped the wristpin out! :mad:
Never tried to use them in a car/boat engine so i wont comment on that :)

I know a few people that use them, never used them myself though. Currently, I am running, Lunati rods, & Lunati / Taylor Pistons, and haven't had an issue in 5 seasons.

Just outta curiosity, what's everyone else using for piston & rods ?

i use them in my two strokes and they work very well. i also use them in my repairs. i do not over bore the cylinder to compensate like alot of shops do. in two stokes i have found most failures are caused by cold siezing in the cylinders. this is usually not the pistons fault. fyi

Two of the biggest guys in two strokes:

Sam Baker said he wouldnt recomend them.

Jay Smith said he will use them but has to do a lot of extra work, "overbore" the cylinder and other things.


mrv8outboard, why would you not "overbore"?

yep not many winston cup teams still use wisco !! I HATE THEM ,VERY POOR METAL,

TAYLOR OR HOLLEY OR LUNITI,WHO EVER OWNS TAYLOR THIS WEEK MAKES GOOD PISTONS FOR SURE AND J&E DOES THE BEST NEXT TO MAHLE ,WHICH ARE VERY VERY EXPENSVE !
ALSO BILL MILLER MAKE A KILLER PISTON

DON'T KNOW ANYTHING ABOUT INDUSTRIAL WEED-EATERS DO THEY HAVE PISTONS REALLY OR ,WELL I THOUGHT IT WAS A BUNCH OF MAD BUMBLE BEE'S MAKING THAT GOD FORSAKEN NOISE !!!:p

mark in
 

omc gives a bore spec. wisco does not. if it is a new sleeve bored to std what ever that is,and that's it no more. some shops go over slighty if you are going to use wisco's but i don't and have installed many with out problems. proper setup and breakin has always worked. fyi

I learned all about Wiseco with my CR125 back in High School...:(

Like the others, I WILL not nor have I used them in any of my 2 stroke MX Bikes or ATV's. Others warned me years ago to stay away from them.

Ok. So everyone says stay away from 2 stroke Wisecos.
What about 4 strokes any problems???
DAVE

To answer your questions, I think the first failure was due to a piston ring land failure. We were testing in Freeport in the Bahamas and got a shower of oil and aluminum out one of the tailpipes. When the ring land lets go at 7500 RPM it just starts sending shrapnel thought the whole engine and the piston just becomes a ball.Second failure was in the piston pin area at The Worlds in the second race. Same result tons of aluminum.

I don't trust ROUND pistons. All the good ones are cam turned and aren't really ROUND when cold...

I've used Wiseco's in Merc outboards. Overbored additional .0015 and opened ring gap additional .005
Never had a failure. Also never used any over 8000rpm. Only used factory Merc pistons in the 8500 - 9000 rpm range...