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new pistons on 10psi?
Ok, I have a simple question.
I put a fresh rebuild in my car 3 weeks ago (d16a6 bottom end)... and it broke a ring land yesterday while attempting to tune it at the dyno. (tune was A+, but mechanics failed). 10psi on t25 d16a6 block d16y8 head Anyway, Now im stuck wondering if I should just swap this other bottom end in, or spend some $$ and upgrade the pistons. (I really don't know if I can afford pistons AND rods right now, and not sure JUST pistons are worth the extra time/$$) I was looking into something like this.. http://cgi.ebay.com/Vitara-Turbo-Pis...QQcmdZViewItem Also, if I do decide to run more booster later 12-15lbs, now my rods are my weekest link. IDUNNO!! |
Re: new pistons on 10psi?
Your rods are still your weakest link in a completely stock engine. If you aren't upgrading them, I wouldn't bother with pistons. Just make sure all specs are checked and the motor is rebuilt properly.
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Re: new pistons on 10psi?
you blew a ringland at 10psi from a t25?
let me tell you that "tune" was not A+ |
Re: new pistons on 10psi?
Know anyone who can hook you up and do the machining for a set of LS rods? I've read LS/Vitaras should hold about 300.
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Re: new pistons on 10psi?
I can get ahold of a set of ls rods... Ill search around on what needs to be done to get them in a d-series.
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Re: new pistons on 10psi?
Originally Posted by Ravage70
you blew a ringland at 10psi from a t25?
let me tell you that "tune" was not A+ http://img169.imageshack.us/img169/3...4mediumlz2.jpg http://img406.imageshack.us/img406/6...8mediumpd1.jpg http://img406.imageshack.us/img406/3...9mediumym9.jpg |
Re: new pistons on 10psi?
Nice
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Re: new pistons on 10psi?
how is a ringland a mechanical failure? it's not like it has a torque spec, unless you think it had a manufacturing defect, but that seems like a stretch. I'd look for another culprit such as a bad injector that wasn't flowing the proper ammount of fuel or something else.
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Re: new pistons on 10psi?
looks like it had poor oiling, did u spec the oil pump?
also maybe u couldnt suple enuff oil with the turbo and all and that was it. my fresh built(not rebuild) did the same ---- because teh oil pickup got cloged and then that was it |
Re: new pistons on 10psi?
I had thought about the injectors... but the plugs looked pristine when we pulled them.
Also, if it was oil pump, i'd assume a bearing to go before a piston would... Anyway, Idunno. I ordered oversize vitara pistona, and now debating whether i can budget rods. We'll see. there was no detonation. This was preignition. A bit of oil build up on the corner of the piston caught on fire and combustion temps rose until the burn started consuming the metal in the combustion reaction - this is what happens when you sunder the bonds of the wet steam formed in the combustion reaction and maintain temps that don't allow free oxygen and hydrogen to combine; instead it seeks out aluminum (and to a lesser extent steel) to combine with. |
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