pistons on stock ecu

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Re: pistons on stock ecu

Postby BriinumsBo » Tue Jun 29, 2010 5:23 am

does the wiseco CR make a difference? how would it impact tuning? im using sw20 metal gasket (same as cometic). i`m about to buy wisecos, but still considering..
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Re:

Postby gt4tified » Fri Jul 16, 2010 1:28 pm

aus jd 2703 wrote:trying to use my own threads,
has any one had good or bad luck with brands of pistons?
im looking for 20 though over 9:1cr
so my main options are:
ross
arias
CP
i hear good things bout cp but nothing about the other?
opinions please?


While I have heard of CP pistons going bye-bye, never heard the same yet about Ross or Arias.
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Re: Re:

Postby BriinumsBo » Fri Jul 16, 2010 2:15 pm

gt4tified wrote:While I have heard of CP pistons going bye-bye, never heard the same yet about Ross or Arias.
You shouldnt write comments like this because they make impact on decision. CP are good pistons. ALL forged pistons have failed in various engines. Not because of their construction but because something else went wrong. Bad bore finish, no honing, wrong clearances, detonation, wrong oil, no warmups, ring end-gap misalignment, etc.. all can lead to piston failure! And in many cases the owner blames the brand of pistons. Even stock cast pistons have been proven to work safely over 400whp, if the tuning is good.
My suggestion - do your research on piston extra features - weight, design, coatings applied from factory, corner rounding, friction grooves, dome squish CR, thermal expansion, etc. There are lots of features and most race teams do some extra piston finishing&coating that costs even more than the pistons. When you`ve chosen your brand, do extensive research on best clearances (manufacturer specifications may not suit all engines perfectly) and do as much as you can to install pistons perfectly.
There are pros & cons and in the end I wouldn't put forged pistons on a stock engine, but price difference made me choose forged Wisecos as Toyota cast oversize replacements cost a zillion here.. If there was no price difference, i`d choose oem cast for <300whp engine. Much tighter clearances, less oil consumption, less engine wear, no ugly piston slap, less damage when pushing cold engine.
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Re: pistons on stock ecu

Postby Mafix » Fri Jul 16, 2010 4:23 pm

very good points to research there!
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Re: pistons on stock ecu

Postby built2run » Thu Nov 11, 2010 7:59 pm

mafix, ur the man. btw hks also has a 2.0mm hg
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Re: pistons on stock ecu

Postby RoAdbOy » Fri Oct 21, 2011 9:02 pm

can we run wiseco pistons with 1mm cometic head gasket, so this will be 9.2cr.
9.2cr with 97octane RON (89-90 MON) pump gas? without problem / knocking?
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