Guest DUNK Posted June 9, 2002 Share Posted June 9, 2002 can somebody help me source some pistons...i need some oversize ones.... idealy i would like some cosworth forgings machined to fit but im strugling to find any1 who can do this so im open to suggestions.... didnt really fancy ordering anything from the japan or the states...just worries me that nothing will turn up...... can anybody recommend a shop over here or or there ??? thanks dunk Quote Link to comment Share on other sites More sharing options...
Alex Posted June 9, 2002 Share Posted June 9, 2002 Cosworth supply JUN, but won't cut Jun out of the middle. JUN are a really nice company to deal with and many people rave about their good service levels. If you really want to source some made in the UK you'll have to get a custom set created...which would possibly be extreamely expensive. I'd go to Jun, mail them direct for a quote and get it sorted...they are very English orientated and easy to do business with from what I've heard. Wish I had the money to buy their kit...just found out my front tyres are bald on the inside....DOH!!! Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted June 9, 2002 Share Posted June 9, 2002 Toyota probably list oversize stock (cast) pistons, but if you want something better then it has to be the Cosworth made ones from JUN USA or JUN Japan. Don't even THINK of buying US made pistons, they are invariably boat anchors from some huge V8 forging. Only 3 firms make PROPER pistons, Cosworth, Omega (both in the UK) and Mahle in Germany. I seem to be US bashing again, but sorry, they just don't make proper light forged pistons... Quote Link to comment Share on other sites More sharing options...
Digsy Posted June 10, 2002 Share Posted June 10, 2002 Do Kolbenschmidt or AE Goetze do forged pistons? I know they do a lot of mass-market cast stuff, but they are pretty advanced companies. Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted June 10, 2002 Share Posted June 10, 2002 The JE ones from the US are OK ( Sorry CW). I know a few people running them with no problem. Buy the ones from Power House Racing though as they are built to a higher spec. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted June 10, 2002 Share Posted June 10, 2002 Originally posted by Terry Saunders The JE ones from the US are OK ( Sorry CW). I know a few people running them with no problem. Buy the ones from Power House Racing though as they are built to a higher spec. Weigh them, then weigh the Cossie ones and cry. Check the bore clearance the JE ones need, then the Cosssie ones, should be weeping buckets by then Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted June 10, 2002 Share Posted June 10, 2002 Chris, If you are willing to donate some Cosworth pistons then I'll gladly weigh them against the JE's;-) Have you actually done this? The JE win hands down cost wise. I am not saying they are the best, but they are not bad. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted June 10, 2002 Share Posted June 10, 2002 Originally posted by Terry Saunders Chris, If you are willing to donate some Cosworth pistons then I'll gladly weigh them against the JE's;-) Have you actually done this? The JE win hands down cost wise. I am not saying they are the best, but they are not bad. I have used them in the 3SGTE engines and as usual for Cossie, they were beautiful units. My experience with US pistons is all bad. JE, Arias and Wiseco are all HEAV and made of an alloy with a big rate of thermal expansion, hence they need big bore cearances which doesn't help ring seal. They often come with Spirolox retaining clips, and these wear the holes oval and come out, some Arias ones scrapped a fresh Cossie engine I did within several hours running (race engine). Given that a Supra engine build is going to cost a packet anyway I think the extra cost of the Cossie ones is worth it. But yes, they are fairly dear, but not excessively so compared to some race pistons. I also agree that JE are better than other US ones, probably on a par with Wiseco. I consider Arias ones to be dire, myself. Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted June 10, 2002 Share Posted June 10, 2002 We'll see how long the hold together:eek: They are defintely lighter than the HKS ones:D If it ever goes bang I'll use Jun pistons & rods. Quote Link to comment Share on other sites More sharing options...
Neil Sandham Posted June 11, 2002 Share Posted June 11, 2002 roughly how much are the cosworth pistons (per set). they they come will all the bits and bobs, ie rings,seals,bearings or do you have to buy al them as well? do they fit the standard crankshaft or do you need it machining to match ? Out of curisity how much overbore can you go to on a supra before you go to far with what the ecu can cope with ? cheers Neil. Quote Link to comment Share on other sites More sharing options...
Alex Posted June 11, 2002 Share Posted June 11, 2002 I think they were £700 ish before shipping, duty, taxes from JUN. You CANNOT buy the JZA80 Cosworth pistons FROM Cosworth they have to come through JUN. E-mail Jun [email protected] ...I think. They will send you a quote PDQ! Quote Link to comment Share on other sites More sharing options...
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