well my main question is, Do you have to mill the rods to fit the ctr pistons? and if so, how much? second what will the compression be?
thanks, and any other info. will be appreciated.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by reaction360 &raquo;</TD></TR><TR><TD CLASS="quote">well my main question is, Do you have to mill the rods to fit the ctr pistons? yes

second what will the compression be? 11:1ish
thanks yep</TD></TR></TABLE>

 

You have to have 1mm milled off each side of the small end of the rod.

I heard 11.5-1 - 11.9-1

 

well since ur puttin the ctr pistons back into a 1.6L block shouldnt the compression be whatever a civic type r is...and i think its 10.6:1 if im not mistakin....the compression only raises if its in a 1.8 block....im pretty sure.....if someone knows diff plz correct me

 

You are wrong! please check https://honda-tech.com/zerosearch

 

4potnick, link doesnt work.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by snowseeker &raquo;</TD></TR><TR><TD CLASS="quote">You have to have 1mm milled off each side of the small end of the rod.

I heard 11.5-1 - 11.9-1</TD></TR></TABLE>

1st part is true, the rod-ends have to be shaved a little, but the second part is wrong...now hear this:

b16a w/ ctr pistons...... 10.801068956759683

complements of http://www.c-speedracing.com

 

c-speed is consistently off. Compression is 11.1:1

 

so c-speed is consistently off buy +.3 or -.3 on the compression calculator?!?!

 

consistently off -.3...it is always lower from what I have seen.

 

does that really make sense? a b16a with pct slugs, which would have the exact same bore and stroke as a b16b, would have a different resultant CR using the same pistons? c'mon now.....

*edit* [playing the devil's advocate here...] unless the b16a head (though still pr3 casting) has a different deck height....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B16b2b &raquo;</TD></TR><TR><TD CLASS="quote">does that really make sense? a b16a with pct slugs, which would have the exact same bore and stroke as a b16b, would have a different resultant CR using the same pistons? c'mon now.....

*edit* [playing the devil's advocate here...] unless the b16a head (though still pr3 casting) has a different deck height....</TD></TR></TABLE>

The stroke maybe the same but the b16b block has the same height as the b18c block...The rods are longer in the b16b block to make up for having a shorter stroke. Basically the b16b block is a destroked b18c5 block. So when you put the ctr pistons into a b16a block the compression will be 11:1 because of the shorter block and rods.

 

wow, what a great discussion.

 

How about compression? The last b16a I did with CTR pistons threw 188 in all 4.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B16b2b &raquo;</TD></TR><TR><TD CLASS="quote">does that really make sense? a b16a with pct slugs, which would have the exact same bore and stroke as a b16b, would have a different resultant CR using the same pistons? c'mon now.....

*edit* [playing the devil's advocate here...] unless the b16a head (though still pr3 casting) has a different deck height....</TD></TR></TABLE>

You are correct except for the fact that the B16B block is the same as a B18C block, and the difference I believe is 3mm. You know how PCT pistons poke out quite a bit in a B16A, well they don't poke out like that in the B16B. Taller deck height=lower compression.

Also, check the compression on a bone stock B16 on C-speeds calc. It will come up lower than factory ratings.

 

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


Also, check the compression on a bone stock B16 on C-speeds calc. It will come up lower than factory ratings.</TD></TR></TABLE>

they come up right about the same...
usdm slugs-10.2xxxx
p30's-10.4xxxxxxx

bone stock otherwise.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by snowseeker &raquo;</TD></TR><TR><TD CLASS="quote">How about compression? The last b16a I did with CTR pistons threw 188 in all 4.</TD></TR></TABLE>

mine was about 230 with a 2pc headgasket.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by WAFFLES &raquo;</TD></TR><TR><TD CLASS="quote">c-speed is consistently off...</TD></TR></TABLE>

that's the only thing that i've noticed about they're [c-speed] CR calculator.....rod length in customized applications. as far as they're concerned, you can put an itr crank, rods [?], and pct pistons into your b16a and correctly figure out your compression ratio. they should update that and put in boundaries to keep everyone informed.

isn't the stroke dependent on the crank specs AND rod length?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B16b2b &raquo;</TD></TR><TR><TD CLASS="quote">

they come up right about the same...
usdm slugs-10.2xxxx
p30's-10.4xxxxxxx

bone stock otherwise.</TD></TR></TABLE>

huh! I remember doing it a while back and got like 10.01:1 for usdm pistons. crazy!

but yeah, the deck height does make a difference.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B16b2b &raquo;</TD></TR><TR><TD CLASS="quote">
isn't the stroke dependent on the crank specs AND rod length?</TD></TR></TABLE>

?

 

yes.. you'd be changing the stroke if you used a longer rod, and had a different crank. You could, however, move the wrist pin to compensate a little bit for the change in stroke.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B16b2b &raquo;</TD></TR><TR><TD CLASS="quote">
, you can put an itr crank, rods [?], and pct pistons into your b16a and correctly figure out your compression ratio. Not possible without a deck plate.

isn't the stroke dependent on the crank specs AND rod length?</TD></TR></TABLE> yes

also, the B16B has a longer rod then the B16A...don't know why I threw that in, but I did, lol.

 

i just meant that the c-speed calculator allows people misleading information, meaning that its easy to get the wrong idea what is necessary to make XYZ application work.


Modified by B16b2b at 4:12 PM 7/22/2003

 

ahh...sorry for the confusion. lol

 

for instance...you could't look up (at least at c-speed) if you could run an itr crank, p30 rods and pct pistons.....could you make that setup work, since the p30 rod is a little shorter?