In the case of JE the pistons are forged by PFP in Montebello CA. The forge shop has the forging dies and drop cutters manufactured for them by RONDEE Die Inc. RONDEE uses very little CNC and almost 95% EDM to mfg. the dies. The combination of PFP and RONDEE make the forgings for JE as well as numerous high end customs like Arias, Ross, Venolia (sp), and Howard. Only two comapnies actualy do in house foirging and that is TRW and KB. I can not say where CP has there forgings made for sure but I can find out if anyone is curious. They may even also be done by PFP, but I can guarantee that they do not make there own forgings. In this country there are very few forg shops left and even fewer die shops.
I would have to agree Wiseco's forgings are done in a very unconventional way that reduces quality but increases profitability. They are good but from a forging die sinkers point of view they are no where near the best.
Sorry for interjecting here, but I always feel the need to clarify these types of things being a 3rd generation forging die sinker.
You better check your sources. You are way off on some of this info.
For starters, since neither JE or CP make their own forgings or forge tooling, they do not have complete control over this part of their process. EDM is one of the highest quality methods of manufacturing forge tooling, which is why Wiseco uses this method to make all their own forge tooling in house. Wiseco also forges ALL their own pistons in house, using the MOST state of the art isothermal forging presses in the world. Isothermal means the material and forge tooling are all at the same (high) forging temperature, and the hydraulic presses have total closed loop process control over temperature, pressure, speeds, and tonage. Wiseco developed these controls in house and their process is unparelleled to other piston forgers. I'm not saying other forge shops don't use hydraulic presses and isothermal processes, but Wiseco's unique tooling designs and configurations are superior to any other piston companies we've been discussing. I was not even aware KB made his own forgings, and I thought TRW went out of business. I'm not 100% sure on those two topics, but I think you are incorrect in your claim.
What are you refering to about Wiseco's unconvential forging process and lesser quality? My info above proves you are bass-akwards, as Wiseco's forging process is of the HIGHEST quality and produces complex, deep pocket, thin web, precision piston forgings, of which the finished pistons are designed on. Wiseco has over 700 different shelf stock forgings, which BLOWS away any other piston company in the same market, and gives Wiseco the ability to optimize their finish piston designs for each application, instead of trying to fit them on a forging that is "close enough", and make up for it with extra milling.
It absolutely blows me away with the misconceptions and misinformation out there. I would rather people say nothing, or at least preface it with "I'm not sure" than to pass along incorrect information to people that are trying hard to learn the facts.
Just for the record, I'm not trying to say there aren't several high quality piston companies out there. I'm just trying to diffuse the incorrect information about Wiseco. I honestly cannot understand how the wrong information is spread so much.