Breaking News from Japan For K series motors

8682 Views 54 Replies 25 Participants Last post by wadzii, Jul 17, 2005

nikos

Discussion Starter · Apr 19, 2005

In Japan, a Tuning Magazine called Hyper Rev, just published a story.

Apparently, using HONDA OEM PARTS , they were able to make a 2.0 L K20a into a 2.3 L. TOP FUEL JAPAN, did it and they are soon going to be offering this as KIT.

These motors are 86 mm x 96 mm using b16b rods. In case you don;t know, B16B pistons infact ARE longer than B18C/C1/C5 rods. They're actually the longest B series rods. The exact legnth is unknown.

They dynoed this setup in a Civic Type R and saw a 50 HP gain with whatever else they had in there. Keep in mind, that they revved it to 9000 RPM with no problems.

Tomorrow check back and I will post scanned pics of the article in Japanese.

Some food for thought...

After looking here, http://www.raceseek.com/honda_specs.htm

the only crank that is close to 96 mm is the h23a1 and h23a4 which is 95mm out of the 92-96 prelude and 97-98 prellude.

Any ideas about converting the crank to a chain? Journals?

The length of b16b rods seems to be impossible to find. I cannot get much info on the cranks as well.

41 - 55 of 55 Posts

BigDawg

· #41 · Jul 8, 2005

chunky` said:
Not to split hairs, but Increasing stroke results in higher intake air velocities v.s. a same displacement motor with less stroke but more bore. This is simply a result of the higher piston speeds at a given RPM. This is also why more stroke = less RPM potential b/c the piston speeds are higher for a given RPM.

there's a tradeoff for everything. More stroke = better low end power, but you can build a big bore motor that will rev higher and can thus use a shorter gear to produce essentially the same torque for a given vehicle speed.

just clarifying.

I agree with chunky. I also beg to differ on the thought that an engine is more reliable if you increase bore AND stroke. Less piston speed and a more favorable r/s ratio can be used to increase reliability, while a larger bore can be used to increase displacement and still keep pistons speeds down.

You know this already though. You are destroking a motor and increasing the bore because it is more beneficial for higher RPM reliability to reduce piston speeds, while still maintaining a larger displacement.

overlap..

· #42 · Jul 8, 2005

so what do you guys think? is it a h22 crank or k24, i would imagine the k24 bearing journals are smaller so costwise i think its a h22 but also since h22 is 95 and article says 96 they spent the extra money anyhow to modify crank which brings back to square one.

what crank is compatable with b16b rods?

rochesterricer

· #43 · Jul 8, 2005

You guys are forgetting that you don't have to worry about high rpm reliability if you can make all of your power at a lower rpm. There are some very interesting things that happen, engine dynamics wise, as the r/s goes down.

Soda Popinski

· #44 · Jul 9, 2005

But when you have a R tranny which is so short you want that power up to 9k. LOL

K2e2vin

· #45 · Jul 9, 2005

with the R tranny you might just smoke rubber through all the lower gears. lol

H2nr

· #46 · Jul 9, 2005

I have a brand new H23/F22 (95mm) crank for sale if anyone is interested. Make me an offer

Soda Popinski

· #47 · Jul 9, 2005

So has anyone figured this out? Anyone willing to give this a shot. LOL

overlap..

· #48 · Jul 9, 2005

Find out what crank was in this motor and you might just find your self a buyer... how's 300 bux?

H2nr

· #49 · Jul 10, 2005

here is the part number on that crank 13310-P0A-000. Its the same one they use in that stroked K20. I was going to use it in my K24a2 with H22 rods from Brian Crower and custom pistons from CP but I have now decided to use a crank with more stroke. chieF rocka PM me and we can try to work something out.

chunky`

· #50 · Jul 11, 2005

rochesterricer said:
You guys are forgetting that you don't have to worry about high rpm reliability if you can make all of your power at a lower rpm. There are some very interesting things that happen, engine dynamics wise, as the r/s goes down.

true, but rpm potential comes in handy when you also consider gearing.

rochesterricer

· #51 · Jul 12, 2005

chunky` said:
true, but rpm potential comes in handy when you also consider gearing.

Exactly. You can get the same acceleration with taller gearing with a torquier motor. That has the added advatage of not having to put up with big rpm when on the highway. Not to mention the fact that the taller geared trannies tend to be more common and cheaper.

nikos

Discussion Starter · #52 · Jul 12, 2005 (Edited)

i have 4 bseries type r rods for sale

See less See more

overlap..

· #53 · Jul 12, 2005

what are the bearing width on those b rods?

bossman032

· #54 · Jul 15, 2005

those rods are they ctr rods?

they kinda look longer

wadzii

· #55 · Jul 17, 2005

that chart you posted is wrong, it has all b16 rods listed as the same length, they are not. by my calculations a CTR b16b rod is 148mm long. something else that might be worth looking into is the f20b rods, they have b series size rod journals and are 145mm long. eagle also makes a few shelf rods that are pretty long, the longest is 5.963"ish

41 - 55 of 55 Posts

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