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K-Tech F215-SS

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Old 09-06-2009, 02:21 PM
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Thumbs up K-Tech F215-SS

Hey guys. I just watched VTEC Club 5 and they had a feature on K-Tech's amazing performance rotating assembly! The version I have of the show doesn't have subtitles, and my Japanese is limited, at best.. So, I could only gather some of the deatails about it.

Specs are as follows:

2139cc
88x88mm Bore/Stroke
11.7 CR

The kit features a shorter piston height than stock with a smaller, but thicker wristpin and a weight of 320g (versus 470g stock F20C). Mated to that is a special con-rod that is longer than stock and is stated as a unique H-I beam design from K-tech, weighing in at 532g versus 650g (F20C). The final piece to the puzzle is the K-tech produced crankshaft, which features a shorter stroke than a stock F20C (45mm versus 48mm) and even some knife-edge grinds to reduce weight even further (as well as windage).

Piston Speeds @ 9,000RPMs

F20C: 25.2m/s
F22C: 27.2m/s
K-Tech: 26.4m/s

There was also some Kanji next to the graph describing some sort of load @ 9,000RPMs... I'm not really sure what it was about, though:

F20C: 2280.38kg
F22C: 2517.40kg
K-Teck: 1634.86kg <----After stating this they flashed an enthusiastic banner across the screen with 14,000RPMs on it!



After watching it the feature I went onto all of the usual search engines and they produced nothing for K-Tech or the F215-SS. So, if anyone has any more information on this K-Tech performance package I would really like to learn more about it! A price range and any information about availibility would be really helpful info! Feel free to post your opinions, too.

Thanks for reading.
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Old 09-06-2009, 04:48 PM
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here you go.
you can use google translate for this webpage:

http://www.maroon.dti.ne.jp/k-tech/f20c.html
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Old 09-07-2009, 05:30 PM
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Wow, this sounds pretty interesting, does anyone else have any information on this? I didn't understand the website very well.
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Old 09-07-2009, 06:13 PM
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I have seen this before. It's called the "Square" engine. Because the bore and the stroke are the same. If memories serves me correctly, I thought the wrist pin was 1mm undersized not oversized. Can anyone with kanji skills confirm this please?

-Asura
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Old 09-08-2009, 02:13 PM
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Whoops... Hehe, I meant to mention that (or maybe I just typo'd). But, yes the wristpin is a smaller diameter, but to make up for being smaller, they made it thicker in material (wall thickness?).

I can't display the Japanese characters here at work so I can't translate it (just shows boxes and question marks...), but if anyone else can translate it and post it, that would be pretty awesome of you!
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Old 09-08-2009, 03:20 PM
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Wrist pin is 3mm undersized
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Old 09-08-2009, 04:56 PM
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Old 09-10-2009, 07:08 AM
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Has anyone else seen the video that could maybe translate and see what it was saying about 14,000 rpm?
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Old 09-10-2009, 12:25 PM
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Originally Posted by ASM Stook,Sep 10 2009, 11:08 AM
Has anyone else seen the video that could maybe translate and see what it was saying about 14,000 rpm?
I assume they are saying that the side load forces of their rotating assembly doesn't meet that of a stock f20c until 14,000rpm, however at that point the piston speeds would be astronomical. They are already greater than that of the f20c when compared at 9000rpm. I imagine this motor revs like crazy and wants to keep going beyond 9k.
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Old 12-30-2012, 06:43 PM
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!!
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