Michael Delaney

The B16A rod is 134mm long and 19.5mm in width at the big end of the rod for the rod bearing.

Does anyone know for certain (no guessing please) whether the CTR rod is idntical to the B16A rod in specs?

gsrvx

This is probably no help...but the only thing I was able to find was that the CTR rod bearing width is 17.5mm.

-Rod

Mista Bone

CTR rod is ITR spec at 137 mm.

B18C-EJ1

Where did you find that.

The CTR rod is longer than a ITR rod.

Let's look at the circumstances.

ITR = 87.2 x 81mm
B16 = 77.4 x 81mm

CTR block = ITR block + B16 crank

Rod length = ITR rod (137mm) + 9.8mm

CTR rod = 147mm (approx)

HTH


[Modified by B18C-EJ1, 1:32 AM 1/2/2002]

B18C-EJ1

Oh, to answer your question. No, the CTR rod is much different from the B16 rod.

HTH

Michael Delaney

The B16A rod is 134 mm with a rod bearing width of 19.5mm

The B18C5 and B18C1 rods are 137.9mm and rod bearing width of 17.5mm

The strokes of a B16B and B16A are identical (77.4 mm)
The rod ratio of a B16A is 1.75
The rod ratio of a B16B is 1.77

The difference in rod ratio is said to be due to a difference in the b16B deck height.

Now with all of this info and using every search engine I have not been able to fing a reliable source telling me the width and length.

You cannot deduce it from any of the facts I told you above.

If you have a reliable source can you tell me the spec without guessing and refer or link me to the source ?

much appreciated in advance.

Mista Bone

Divide that 9.8mm by 2 for starters.

Michael Delaney

let's try this another way:

has anyone out there put CTR pistons on an B16A rod without having to mill the smallend of the B16A rod?

I thought this was supposed to be a high tech board? you can't get a simple answer to a simple question.

Mista Bone: what's up with the Endyn site? kinda miss visiting folks there. Happy New Year BTW. I think Larry may be doing his own header test.

cheers




[Modified by Michael Delaney, 9:28 AM 1/2/2002]

RyanR

For any rods besides B18C rods you have to mill the small end of the rod to fit any "R" pistons. Here's the famous Katman pic to explain the procedure. http://www.ff-squad.com/Specs/B16%2B17rodmod_1.jpg

Michael Delaney

BTW deck height =

(stroke/2 )+ Rod Length + Compression Height + Stock Deck Clearance = 203.37 mm in a B16A

The B16B supposedly has the same deck height as the B18C5 which is 212.39mm

A difference of 9.02 mm. The strokes are identical since the cranks are identical at 77.4mm. The compression height on a B16B is 30.73 mm and on a B16A is 29.97 mm.

I don't know the stock deck clearances. hence my problem on deducing rod length.

And the rod width....

RK where did you find out that the CTR rod bearing width is 17.5mm? Can you link me to that site or email? That is helpful since that would mean the CTR rod is different than a B16A rod in thickness....big implications for hybrids.

cheers

Michael Delaney

thanks. I was aware of that pic but was not sure if "R" piston meant JDM ITR, USDM ITR, and CTR altogether....precision counts. If you interprete it to be that the CTR rod is thinner by 2 mm at both ends, then that makes the CTR rod the same thickness as B18C rods.

Now on to length....is it 137mm (this is the B18A/B, B20B, B17A rod length but these are thicker than B18C)

or is it 137.9 mm like the B18C rod?

The way I'm deducing it without anyone physically saying it: CTR rod = ITR rod. So basically a CTR block is a B18C block with B18C rods , B16A crank, and special domed B16B pistons.....yes?

B18C-EJ1

Ok, got it.

The CTR rod is 142.1mm

Michael Delaney

142mm?! holy schmoly batman.....that would mean the rod ratio would be 1.84....that can't be right....

B18C-EJ1

Yep, that should be it.

Do you understand how I came up with this?


[Modified by B18C-EJ1, 8:25 PM 1/2/2002]

Michael Delaney

https://honda-tech.com/zeropost?cmd=reply&id=913704

I guess you were right...Katman confirmed that the B16B rod is thin like the B18C rods and different from the thicker B16A rod. So RK you were right too...17.5mm thick (B16A is 19.5mm thick) .

It's the longest B rod. So it must be longer than the B18C 137.9 mm and the B16A 134mm.

142.1mm long eh? **** that is long......(I hear girls say that to me too...about the B16B rod length I mean ) .

cheers

PS I think I can guess how you got the answer but maybe you can tell me just to confirm and educate our viewers. I'll take Honda Engine Building for $1000 Alex....It's the Daily Double!


[Modified by Michael Delaney, 9:02 PM 1/2/2002]