I feel dumb as **** ... I have no idea which side of the piston is intake and exhaust. How do you also figure out cylinder number?

 

The stock pistons have an arrow on them that points to the front of the motor. What pistons are you using?

Sonny

 

Wisecos

 

I'd also like to add that I love your website. It's helping me out a lot, but your pistons look diff than mine.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by maztur &raquo;</TD></TR><TR><TD CLASS="quote">I'd also like to add that I love your website. It's helping me out a lot, but your pistons look diff than mine.</TD></TR></TABLE>

Cool. Thanks.

The valve reliefs on the intake side of the piston will be larger than the exhaust side. Got a pic of your piston? (The one for your motor )

Sonny

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Sonny &raquo;</TD></TR><TR><TD CLASS="quote">

Cool. Thanks.

The valve reliefs on the intake side of the piston will be larger than the exhaust side. Got a pic of your piston? (The one for your motor )

Sonny


</TD></TR></TABLE>

I'll take a picture tomorrow and I'll post it. (Should have done that first but I'm anxious.) Does it also matter which piston goes in which cylinder? I would assume so since you have yours marked 1-4.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by maztur &raquo;</TD></TR><TR><TD CLASS="quote">

I'll take a picture tomorrow and I'll post it. (Should have done that first but I'm anxious.) Does it also matter which piston goes in which cylinder? I would assume so since you have yours marked 1-4.</TD></TR></TABLE>


when you re-build a motor you must match the pistons to the bore, meaning forget the # and measure each piston so that it match each individual bore.also the entire assembly should be balanced.

 

They are marked because I sent them to the balancing shop that way. Order doesn't really matter unless the pistons are not all the same size. Ie, if one is a touch bigger than the rest and the #1 cylinder was bored to match that piston, that piston needs to stay in the #1 cylinder.

Sonny

 

I had the machine shop bore my block using the pistons and adding .0035" of piston-wall clearance. They never marked which pistons went into which cylinder though ...

 

Hey, Sonny I got a balancing question for you. I balanced my bottom end but I don't know if I did it properly. Instead of balancing each rod & piston to be exactly 880g I made 2 set's. each set resulting in an equal net weight.

Set A-
R&P #1 =890g
R&P #3 =880g
1770 total G

Set B-
R&P #2 =890g
R&p #4 =880g
1770 total G

Gram weights are approximations.

I couldn't get them to be perfectly weighted so my logic was that I would have equal total wieghts since our cranks put two up & two down. It was easier than having to remove like 15 grams out of one. 15 grams is alot to grind out of something like a piston & a rod BTW.

What do you think of my solution, Ive already put over 300 miles on the motor & it seems to be working out nicely. this is just a mental excercise so to speak.

Sorry about hijacking this topic.