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Posted: Sun Nov 23, 2014 11:46 pm
by wistech
I will be testing out some new pistons I had made since the ones I use the most (98mm)are very hard to come by. I have some custom wrist pins on the way so hopefully I can have an engine running in the next week. These were designed taking into consideration available forgings, the best traits of the ASSO, CP and wiseco designs. The one in the center is the result. I kept the single compression ring but with the abilty to do it in gapless . Skirts were bigger for longer life. The forging is an x support design like the cp and asso . The supports webs go from corner of the skirt to the center of the pin bosses unlike the WWE piston on the right which go to the outside edge for less wrist pin flex. I think maybe there is to much metal in the pin area which could be lightened up.
I kinda miss the good ole days of R&D and I have not done much since getting the rods redesigned so here we go for more possible win or fail.
Posted: Sun Nov 23, 2014 11:50 pm
by wistech
The only piston I dont have to compare is a JE but some of you will be able to tell which is which.
Posted: Mon Nov 24, 2014 12:07 am
by ScramblerXLE
Looks good John! Keep us posted!
Posted: Mon Nov 24, 2014 1:13 am
by wistech
Will do. I also need to get some liners made. Ive been leaning towards steel as it can be precision bored for each piston instead of a generic size which leads to variances. Unfinshed bores can be had for much less money and less is needed for stock as one sleeve will be good for all piston kits. My local shop has been deadly with match boring .
Posted: Wed Nov 26, 2014 8:33 am
by polyesterpig
Will do. I also need to get some liners made. Ive been leaning towards steel as it can be precision bored for each piston instead of a generic size which leads to variances. Unfinshed bores can be had for much less money and less is needed for stock as one sleeve will be good for all piston kits. My local shop has been deadly with match boring .
Also, gapless rings tend to work better with steel sleeves!
Posted: Thu Nov 27, 2014 2:14 pm
by dunnbandit1
The only piston I dont have to compare is a JE but some of you will be able to tell which is which.
I have an old je piston I could send you if you want it
It has a shorter skirt than the Wisco I put in and has oil holes going to the wrist pin which the Wisco does not have
[attachment=13289:JE_Piston.jpg]
Posted: Sun Nov 30, 2014 7:58 pm
by kdeal
I have an old je piston I could send you if you want it
It has a shorter skirt than the Wisco I put in and has oil holes going to the wrist pin which the Wisco does not have
I tried to post pics but it said file size is to big to upload
Send it to me Jason, I will load the pic.
krdeal at bellsouth dot net
Posted: Sat Jan 31, 2015 4:35 am
by who_gives_a6
Any updates on these out of curiosity?
Posted: Sat Feb 14, 2015 1:48 pm
by yamadjs08
Any updates on these out of curiosity?
I am curious as well.
Posted: Sat Feb 14, 2015 4:26 pm
by wistech
The trails are still closed for quads.,its 0 degrees with high winds today ,kind of a bummer of a winter. On the bright side I have purchased a ton of new head porting tools and have been able to get some of those ready for summer. Ive also been working on getting new affordable sleeves, nitrided/dlc cam buckets and valves springs that dont bag out after a week. I see the camshaft supply is dwindleing again so another run of those will have to be made before the year is out. Just need to win the lottery to pay for all this .
I do have some stock and Cp piston kits on the shelf for the time being until the testing is done on the new pistons so Im not panicking yet.