molnar rods and stock pistons - Toyota Yaris Forums

chancellor6869 · 01-14-2015, 10:21 AM

im ordering parts for my engine build today and i was wondering if i really need to order forged pistons for my new rods. ive heard that the pistons them selves are pretty strong. just currious on what you guys think i should do. i know forged is always better but im not expecting to get a whole lot of hp out of my build. do you think the stock pistons are good for 350hp? thats at the high end i doubt i will make that much power when im done.

ilikerice · 01-14-2015, 11:25 AM

you should look at the "forced Induction" section. Lots of information there. Also, this may help. I linked this in another thread very recently

http://www.yarisworld.com/forums/showthread.php?t=32747

xnamerxx · 01-14-2015, 11:42 AM

The stock pistons aren't grooved for a retaining ring so you'll either need to have one machined or you'll have to press the bushing out of the rod in order to convert the rod to a press fit style pin.

So basically it would be easier to purchase a piston designed for a bushed style rod than convert the stock piston to be used with a bushed rod.

chancellor6869 · 01-14-2015, 12:21 PM

Quote:

Originally Posted by xnamerxx

The stock pistons aren't grooved for a retaining ring so you'll either need to have one machined or you'll have to press the bushing out of the rod in order to convert the rod to a press fit style pin.

So basically it would be easier to purchase a piston designed for a bushed style rod than convert the stock piston to be used with a bushed rod.

this is very helpful. thank you.

01-14-2015, 10:21 AM	#1
chancellor6869 Drives: yaris hatch is the sh*t Join Date: Jan 2013 Location: fortworth texas Posts: 74	molnar rods and stock pistons im ordering parts for my engine build today and i was wondering if i really need to order forged pistons for my new rods. ive heard that the pistons them selves are pretty strong. just currious on what you guys think i should do. i know forged is always better but im not expecting to get a whole lot of hp out of my build. do you think the stock pistons are good for 350hp? thats at the high end i doubt i will make that much power when im done.

01-14-2015, 11:25 AM	#2
ilikerice Drives: 2010 black yaris Join Date: Oct 2010 Location: savannah, ga Posts: 2,868	you should look at the "forced Induction" section. Lots of information there. Also, this may help. I linked this in another thread very recently http://www.yarisworld.com/forums/showthread.php?t=32747 __________________ -Derrick- "Racing is important to men who do it well. When you're racing... It's life. Anything that happens before or after, is just waiting."

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01-14-2015, 11:42 AM	#3
xnamerxx 0-60 in slow Drives: light blue liftback Join Date: Aug 2009 Location: so cal Posts: 926	The stock pistons aren't grooved for a retaining ring so you'll either need to have one machined or you'll have to press the bushing out of the rod in order to convert the rod to a press fit style pin. So basically it would be easier to purchase a piston designed for a bushed style rod than convert the stock piston to be used with a bushed rod.