Pro X / Wiseco Pistons

[Mark44]

I use pro X becaus I never let my ski warm up. I start it up and have fun. Brap!

Mark44

 

[Idok]

if youre going wiseco, make sure whoever does the bore is familiar with the differing wall clearances...

ive used both.......no preferance really, but I typically like to jump on and rip......aka no warming up..

 

[yamaslut]

Last edited by Mark44 : 10-20-2006 at 03:24 PM. Reason: "Because she means the world to me"

wth??? :haha:

 

[Mark44]

Someone actually reads these....................I always wondered.........

Mark44

 

[Starvin48]

Anything will work if properly set up. Ironically, we noticed better performance with a proX or OEM because of the characteristics of the piston when it is warmed up. The Wisecos grew square (lost compression when warmer).

Bottom line: we use proX or OEM on everything because our dyno shows they perform better. That's on every type of motor, stock through ss. They last longer, too.

 

[yamaslut]

all the engine builders I have spoke with recomend Pro-x or OEM... I have never heard of someone saying wiseco was better, I was always told it was a lesser alternative.

 

[Mouthfulloflake]

wiseco is a superior product from a materials and machining standpoint.
ive posted pictures of both pistons side by side ( prox-wiseco) on the other site I think.

Wiseco is better.

BUT, they require more clearance, and warm up time.
thus they arent for people who either dont understand how to measure, or, dont know how to warm up.

pro-x probably makes more customers happy, since they are basically more fool proof in this aspect.

Wiseco, is NOT a cheaper, worse, or less option, They have, more performance, better metalurgy, but they require more care to set up initially, and more care to use ( warming up)

all the engine builders I have spoke with recomend Pro-x or OEM... I have never heard of someone saying wiseco was better, I was always told it was a lesser alternative.

 

[SUPERTUNE]

Stock OEM Yamaha 760/1200 are very heavy slugs...Go with Wiseco pro-lites...my Team Scream motor that I built in 2002 Still runs great! Chick has 3 seasons on it now. With proper set-up Wiseco pistons are way better.
P.S. I did have wristpin failures (too thin) in 2000 when wiseco first came out with the 760 pro-lites...word to the wise, always buy new current Wisecos.

Yamaslut, I have said BETTER pistons. I make horsepower in freestyle motors and because of their much reduced piston and pin weight, the motor has faster throttle response and accelerates rpms faster. I think you have ridden one of my motors?

 

[Idok]

Yamaslut, I have said BETTER pistons. I make horsepower in freestyle motors and because of their much reduced piston and pin weight, the motor has faster throttle response and accelerates rpms faster. I think you have ridden one of my motors?

not joking here..but I was evesdropping on some harley guys conversation the other night...

they were talkikng about big power gains in their HAWGS by replacing the pistons with some "race style piston" something or other.....



same concept?

 

[Legdragger]

I never heard of Pro-X until I started playing with jet skis. I have to use Wiseco since they are the only ones that offer 85mm pistons. Are the prices pretty close?

 

[SUPERJET-113]

Nobody has mentioned what a cast piston does when it breaks or cracks. It crumbles like a cookie.

Its Wiseco's for me for the last 15 years in all my ski's. I just have someone reputable do the boring with pistons in hand. Group K did my last bore with Wisecos and its perfect. A little warm up before i leave home and a nother little warm up before it hits the water and never a problem, even in the cold winter waters.
I have no problems whatsoever reccomending OEM or Pro-X either, but I prefer Wiseco.

 

[FL-cracker]

Great thread. Verry informative.

 

[michael950]

A few additional comments on buying paired Weisco's

Buy Wiseco pistons individually or as "matched" pairs?

 

[ski4]

never had trouble with my weisco's
i did crumble a set of pro x's but that was my fault

i now am using vertex and so far so good ( they are coated pro x's)

 

[Legdragger]

Nobody has mentioned what a cast piston does when it breaks or cracks. It crumbles like a cookie.

QUOTE]

Cast crumbles like a cookie, what does forged do? I think either way it is going to be messy:frown:

 

[SUPERJET-113]

A forged will not break as easy and if it did it would be one or a few small pieces as opposed to 30 small crumbly pieces that could ruin the whole motor instead of maybe just trashing a top end or just a bottom end. When a cast skirt breaks lookout! I think its more so with racers than with freeride/freestyle apps.
Lets see what Jr. or Chucky think, I'll bet they would agree on that point.

But yeah, either way it still sucks!

 

[yamaslut]

Yamaslut, I have said BETTER pistons. I make horsepower in freestyle motors and because of their much reduced piston and pin weight, the motor has faster throttle response and accelerates rpms faster. I think you have ridden one of my motors?

oh hell yeah... your stuff rips Chuck. :hail:

I was just saying what I had heard up until now... I'm not by any means an authority on motors... I guess people have refered me to them out of ease of use and reliability...
:dunno: :dunno: :dunno:

 

[butti]

my weisco motor has far out lasted my cast piston motors:wink:

 

[yamahammer]

have hammered both many times nothing is indestructible- if set up right both are good pistons- oem seem to be the toughest on our freestyle engines though- that see no warmup at all ever, lots of water ingestion, and general total lack of caring, maintenance, or sh!tgiving- when the cylinders come off oems have always looked the best- just my personal experience

 

[Legdragger]

In theory wouldn't a forged piston tolerate a little more timing advance/ compression without breaking? Or would it fail just about as fast? I know my timing is ragged edge right now but it is soooo snappy.