Piston orientation
05-15-2003, 02:25 PM
#1
Honda-Tech Member
Thread Starter
Join Date: Sep 2001
Location: WI
Posts: 3,691
Likes: 0
Received 0 Likes
on
0 Posts
Piston orientation
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? 
05-15-2003, 02:38 PM
#5
Honda-Tech Member
Re: Piston orientation (maztur)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by maztur »</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
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
05-15-2003, 02:46 PM
#6
Honda-Tech Member
Thread Starter
Join Date: Sep 2001
Location: WI
Posts: 3,691
Likes: 0
Received 0 Likes
on
0 Posts
Re: Piston orientation (Sonny)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Sonny »</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.
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.
05-15-2003, 02:57 PM
#7
Join Date: May 2002
Location: Jinx Proof Brown Noser.
Posts: 620
Likes: 0
Received 0 Likes
on
0 Posts
Re: Piston orientation (maztur)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by maztur »</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.
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.
Trending Topics
05-15-2003, 03:01 PM
#8
Honda-Tech Member
Re: Piston orientation (maztur)
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
05-15-2003, 03:17 PM
#9
Honda-Tech Member
Thread Starter
Join Date: Sep 2001
Location: WI
Posts: 3,691
Likes: 0
Received 0 Likes
on
0 Posts
Re: Piston orientation (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 ...
05-15-2003, 03:18 PM
#10
Join Date: May 2002
Location: Jinx Proof Brown Noser.
Posts: 620
Likes: 0
Received 0 Likes
on
0 Posts
Re: Piston orientation (T-sohctec)
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. 
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.
Thread
Thread Starter
Forum
Replies
Last Post
.adam.
Forced Induction
26
11-21-2007 02:39 PM
Tryin2Rip
All Motor / Naturally Aspirated
11
10-12-2007 02:39 PM
dude_123
All Motor / Naturally Aspirated
7
09-29-2005 08:02 AM