is there a weight difference between the 2 motors?

ctr vs itr

 

basically Identical.

 

Does it really matter, I mean honestly?

 

this is more out of curiousity. so is there?

 

all b-series motors are within 5 lbs. of each other. with the exception of the old b20a that came in the old preludes

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by clean rice &raquo;</TD></TR><TR><TD CLASS="quote">Does it really matter, I mean honestly?</TD></TR></TABLE>

On the limit maybe (polar moment of inertia and roll center)...

 

Yes,the differnece in weight is 14-15 lbs. Almost everything is lighter on the ctr motor, things you wouldn't even think would be lighter, that add up to the 14 lbs.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by boylovecar &raquo;</TD></TR><TR><TD CLASS="quote">Yes,the differnece in weight is 14-15 lbs. Almost everything is lighter on the ctr motor, things you wouldn't even think would be lighter, that add up to the 14 lbs.</TD></TR></TABLE>

How so? The only differences between the B16B and B18C5 are the crank, rods, and pistons. I know CTR pistons are heavier than ITR pistons (larger dome). My assumption would be the ITR motor has less mass, by a few grams.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b20powereDA &raquo;</TD></TR><TR><TD CLASS="quote">all b-series motors are within 5 lbs. of each other. with the exception of the old b20a that came in the old preludes</TD></TR></TABLE>

i read this a few months back, i wish i had the link but oh well

 

Alright if it means that much, the crank pulley 3-5 lbs less, the starter 3-5 lbs less, and the flywheel, 3lbs less. the crankshaft, rods and pistons about 1lb less. The heads are identical except the ctr has a slightly more aggresive intake cam. the blocks castings are identical, but internals are different.

 

It's negligible.

 

0wn3d!!! nice explanation except i disagree on the flywheel portion they bothe come with lightened flywheels

 

Nice INfo,

 

Your right in that they are both lightened, but I believe the ITR is 18.5lb where as the CTR is 16lb. I could be wrong though as I've not actually put both on a scale.

 

ITR has about 15 foot pounds more than the ctr.

 

Just out of curiousity, how much heavier is the taller B18 block than the B16 block?

 

Its the same block!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Darkane &raquo;</TD></TR><TR><TD CLASS="quote">Its the same block! </TD></TR></TABLE>

wrong. deck height is taller on b18b than b16. cant remember the exact difference though

 

A CTR (B16B) is a destroked ITR (B18C5) hence they share the same block. OEM ITR flywheel weighs in @ 15.5 lbs.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ED9man &raquo;</TD></TR><TR><TD CLASS="quote">Just out of curiousity, how much heavier is the taller B18 block than the B16 block?</TD></TR></TABLE>

The B16B is the same block as a B18C5. The internals are different.

The difference in deck height between a B16A and a B18B is ~25mm

 

Yes, I know that. I was just wondering the weight difference between the shorter block and the taller block.

 

I found this. A little off-topic, but it should help.

https://honda-tech.com/zerothread?id=879294