Hey folks, I saw this posted over at the Yahoo FJ board so I thought I would bring it over here FYI.
Hank Scott wrote:
I have in stock 2 new items for the 1200 & 1250. JE pistons 3.110 bore size,
very light with a tool steel wrist pin. An 82 MM all new 1350 kit using the
latest forgings from Wiseco. Made strickly for us, this piston uses a very
narrow & short skirt, gas ported, a short wrist pin also tool steel is .650
shorter. These pistons are as light as a 1200 piston yet almost 5MM bigger. The
performance gain is just awesome. Thunderous torque without the loss in
reliability. Hank
I don't see any pictures of the new Wiseco's or prices posted at Hank's site.
RPM Randy can you get these? Any more info?
Cheers folks, Pura Vida. Pat
I am making the inquiries and will advise when I get the info.
Randy - RPM
Would love to see pictures of these. Isn't gas porting usually a bad idea for a street motor? Or are these the side ported type? Uses low tension rings I'd guess?
Hey Andy, I recall reading years ago, about FJ engine builders who went to larger displacement motors, did some voodoo magic on gas porting. I thought it had something to do about drilling the ports in the webs, between the cylinders, for crankcase gas pressures to equalize on the piston's downstroke. I'm going by memory here so please help me out. Perhaps the new Wiseco's have the short skirts designed in a way to help this process?
With big 82mm slugs, I do not know why this gas porting would be bad for a street motor. Oil flow issues?
Yea, I'm looking forward to looking at some photos.
A 82mm forged piston with the same weight of a oem 1200 piston? Must be some small skirts.
Thanks Randy, looking forward to seeing what you find out.
Pura Vida.
Quote from: andyb on July 29, 2010, 02:19:23 PM
Would love to see pictures of these. Isn't gas porting usually a bad idea for a street motor? Or are these the side ported type? Uses low tension rings I'd guess?
A classically gas ported piston is drilled from the top into the back side of the top ring land. So the combustion pressure helps shove the rings more tightly against the bore. Means that you can get away with running lower tension rings, and have less drag through most of the stroke, with better seal when you need it. Problem is the porting flils with carbon over time and eventually jams the rings in an outward position, causing huge wear issues and otherwise being problematic.
Though then I thought about it, and it's ridiculous. Almost no one ever does it that way anymore, it's all from the side these days. So it shouldn't be a concern at all.
Ok so here are the pictures, courtesy of Randy@RPM:
First the standard JE 1250cc pistons:
(http://fjowners.com/gallery/1/49_28_10_10_6_29_52.jpeg)
Now the new 82mm Wisecos, look at those short skirts and wrist pin:
(http://fjowners.com/gallery/1/49_28_10_10_6_31_04.jpeg)
Wrist pin difference:
(http://fjowners.com/gallery/1/49_28_10_10_6_33_43.jpeg)
No word yet on pricing.....
Quote from: Pat Conlon on October 28, 2010, 07:52:41 PM
Ok so here are the pictures, courtesy of Randy@RPM:
Now the new 84mm Wisecos, look at those short skirts...
Oh! The PISTONS, you had me a bit excited for a second :)
Quote from: racerrad8 on July 29, 2010, 01:26:14 PM
I am making the inquiries and will advise when I get the info.
Randy - RPM
Did you ever get any news on these?
~$780.00 + ship, and only available thru Hank Scott Racing (HSR) or a Hank Scott dealer like Randy @ RPM. The 82mm pistons are made special for HSR and not available thru Wiseco, only HSR.
Here's how my '84's 74mm piston looks next to the new 82mm Wiseco:
(http://fjowners.com/gallery/1/49_13_02_11_11_40_19.jpeg)
Pat
Could you post a pic showing the top of that Wiseco? Thanks!
Other than what is posted above, sorry, I don't have a close up of the crown.
Since these are going in my street bike where we locals can only get 91 octane, to reduce compression the pistons are now in the shop to have the crowns milled. After they come back perhaps Randy can get a shot of the milled crowns, if that will help you.
After they come back, they are going back out to Swain Tech for TBC crown and PC-9 skirt coating: http://www.swaintech.com/store.asp?pid=10963 (http://www.swaintech.com/store.asp?pid=10963)
(http://fjowners.com/gallery/1/49_28_10_10_6_31_04.jpeg)
whooo hoooo, those are some sexy pistons. that fj is gonna run good. :yahoo:
Quote from: Pat Conlon on February 19, 2011, 12:53:02 PM
Other than what is posted above, sorry, I don't have a close up of the crown.
Since these are going in my street bike where we locals can only get 91 octane, to reduce compression the pistons are now in the shop to have the crowns milled. After they come back perhaps Randy can get a shot of the milled crowns, if that will help you.
After they come back, they are going back out to Swain Tech for TBC crown and PC-9 skirt coating: http://www.swaintech.com/store.asp?pid=10963 (http://www.swaintech.com/store.asp?pid=10963)
(http://fjowners.com/gallery/1/49_28_10_10_6_31_04.jpeg)
I can't tell if the crowns are gas ported. The side shot shows that they are not laterally ported. Excellent move coating those pistons. :good2: I have used Swain Tech many, many times and have always been satisfied with the results.
Yea Mike, they are laterally ported in the ring grooves....see the holes?
Quote from: Pat Conlon on February 19, 2011, 05:08:13 PM
Yea Mike, they are laterally ported in the ring grooves....see the holes?
Yes...I see them now Pat after I put my glasses on. DOH! :wacko3: Thanks. That short wrist is great. You can have a pile of aluminum sitting on the bench trying to lighten pistons and find you only took off about 3 or 4 grams. If you combined that piston set up with Carrillo A beams it would be fantastic in terms of weight savings. Very easy on the crank and smooth. Are those pistons using an XA or XC ring pack Pat?
Quote from: JMR on February 19, 2011, 05:44:44 PM
"........ If you combined that piston set up with Carrillo A beams it would be fantastic in terms of weight savings. Very easy on the crank and smooth.
Yep, I thought about that, in fact that was my first choice, some nifty lightweight Carrillo A beam rods, but like you said, they were a very long lead item (2 months+) and $$$.
I think bang for the buck, a best deal are the XJR1250 rods, with a stronger than stock bottom end, and 35 grams lighter than stock and less than 1/2 the price of Carrillo A's....even though they weigh a tad more than the feather weight Carrillo A's.
IMO, No biggie on a street bike.
FYI, Courtesy of Randy, here's the different rod weights (inc.cap and bolts)
Stock oem Yamaha: 396 grams
XJR 1250 rods: 361 grams
Carrillo H beam: 356 grams
Carrillo A beam: 337 grams
We haven't weighed the 82mm Wisecos yet, that will happen after the milling, balancing and coating, but I
suspect the total weight of the new 82mm Weisco/XJR rod assemblies will be less than the weight of the stock 74mm piston and rod assemblies.
Stay tuned. We shall see where the numbers come in. Yea Carrillo A beams would have been cool.....XJR's will be fine.
Quote from: JMR on February 19, 2011, 05:44:44 PM
Are those pistons using an XA or XC ring pack Pat?
Dunno Mike, I'll ask.
Quote from: Pat Conlon on February 19, 2011, 08:46:51 PM
Quote from: JMR on February 19, 2011, 05:44:44 PM
"........ If you combined that piston set up with Carrillo A beams it would be fantastic in terms of weight savings. Very easy on the crank and smooth.
Yep, I thought about that, my first choice, lightweight Carrillo A beam rods, but like you said they were a very long lead item and $$$.
I think bang for the buck, XJR1250 rods are good deal, with a stronger bottom end and 35 grams lighter than stock.
Courtesy of Randy, here's the different rod weights (inc.cap and bolts)
Stock oem Yamaha: 396 grams
XJR 1250 rods: 361 grams
Carrillo H beam: 356 grams
Carrillo A beam: 337 grams
We haven't weighed the 82mm Wisecos yet, that will happen after the milling, balancing and coating, but I suspect the total weight of the new 82mm Weisco/XJR rod assemblies will be less than the weight of the stock 74mm piston and rod assemblies.
Stay tuned. We shall see where the numbers come in. Yea Carrillo A beams would have been cool.....XJR's will be fine.
Quote from: JMR on February 19, 2011, 05:44:44 PM
Are those pistons using an XA or XC ring pack Pat?
Dunno Mike, I'll ask.
I agree Pat. That is a very nice chart Randy laid out. I personally have not dealt with XJR parts....I'm going to enter it into the info stash.
that looks like it will work :good2:
Kookaloo! (to the max)
I got my fj1200 cylinders and pistons today from an ebayer for 86 bucks with pins and rings can't go too wrong-they are like new low mileage item by the fit and no scratches and the good thing is they drop right in the 1100 cases I found out(they have not been machined) funny thing is could probaly fit sleeves with a couple more millimeters in there(compared them to my other 110 cases same is true with them)this is my turbo bike backup engine since i have a low mile cycle salvage one to drop in the chassis which I am busy tig welding to move engine forward 13 inches seat height 7 inches lower-thinking the best cure for the scored cam caps on the exhaust side of which two are scored is to have the replacement cam hardwelded on those two journals to make them bigger then tighten the cams while turning with valve grinding compound-any advice welcome-Sherwood
Quote from: nealmeal2000 on February 22, 2011, 07:52:07 PM
I got my fj1200 cylinders and pistons today from an ebayer for 86 bucks with pins and rings can't go too wrong-they are like new low mileage item by the fit and no scratches and the good thing is they drop right in the 1100 cases I found out(they have not been machined) funny thing is could probaly fit sleeves with a couple more millimeters in there(compared them to my other 110 cases same is true with them)this is my turbo bike backup engine since i have a low mile cycle salvage one to drop in the chassis which I am busy tig welding to move engine forward 13 inches seat height 7 inches lower-thinking the best cure for the scored cam caps on the exhaust side of which two are scored is to have the replacement cam hardwelded on those two journals to make them bigger then tighten the cams while turning with valve grinding compound-any advice welcome-Sherwood
All that, and not a single period, wow. Not to make fun, but I found it a bit tough to read. I had to stop and go back a time or two to figure out where one thought ended and another began.
Dan
Quote from: Dan Filetti on February 22, 2011, 08:29:36 PM
Quote from: nealmeal2000 on February 22, 2011, 07:52:07 PM
I got my fj1200 cylinders and pistons today from an ebayer for 86 bucks with pins and rings can't go too wrong-they are like new low mileage item by the fit and no scratches and the good thing is they drop right in the 1100 cases I found out(they have not been machined) funny thing is could probaly fit sleeves with a couple more millimeters in there(compared them to my other 110 cases same is true with them)this is my turbo bike backup engine since i have a low mile cycle salvage one to drop in the chassis which I am busy tig welding to move engine forward 13 inches seat height 7 inches lower-thinking the best cure for the scored cam caps on the exhaust side of which two are scored is to have the replacement cam hardwelded on those two journals to make them bigger then tighten the cams while turning with valve grinding compound-any advice welcome-Sherwood
All that, and not a single period, wow. Not to make fun, but I found it a bit tough to read. I had to stop and go back a time or two to figure out where one thought ended and another began.
Dan
Wow!!! I read that post and had no problem with a lack of periods.....I am so used to south of the border, almost engrish that I just made it work with out thinking of how bad it was.....bugger me....I am helping the degradation of my native language with out my awareness. Work is challenging at best to manage communications with many with English as a second language. My brain has already been sucked out. Or I am just way too past my bed time?
If it was item #290532949543.I was going to bid on those but I got item #130483453205 instead.
1350 pistons can come later :good:
I was looking at the cylinders geting gaskets etc when i saw bore #2 had a divot out of it.It looks like a stuck piston left some deposits there that had been cleaned off.He is taking the cylinders and pistons back but I will be out return shipping.Im not happy about that as it was his fault he admited he didnt even look at them properly before shipping.No cylinders :dash2: