I was thumbing thru VTEC Sports Vol.006 when I came across a rather interesting article. A 95mm stroke crank along with 87.25mm pistons is used to get the 2.3liter displacement. I am assuming that this crank is from an F23A since it's not a billet unit and they didn't mention the source for the crank. Compression is raised to 12.16:1. The 255hp with 24kg-m torque was supposedly done with a stock ECU and they are fine tuning the ECU right now for circuit use.

Kit includes:
95 mm stroke crank
87.25mm pistons with rings
rods (look like stock units from a different motor)
head gasket
exhaust and intake gaskets
valve cover gasket
misc seals and gaskets

Price is 480000yen or $4245 at the current yen rate.

If I dig up any more info I'll post more. The dyno plot shown was pretty crappy but peak hp seemed to occur at about 7800 and max torque was near 6000rpm.

 

15Hp for 5Gs? And people tell me Im insane for buying Mugen stuff...

That had better be at the wheels


[Modified by Megatron, 9:37 AM 7/22/2002]

 

more than 15hp. 255whp..... supposedly

 

lol...how long will that thing last? a sprint motor?

 

I have no idea because the article wasn't that informative. An 87.25mm bore x 95mm stroke is a grossly over-square engine combo. I'm guessing they are trying to keep the revs limited to about 8100~8300RPM because that combo will give a good flat torque curve but will not want to rev high.

 

The Spoon crate motors are putting down around 265whp without a displacement increase. Price runs in the $7,000 range. That may be with a 10,000rpm redline though... I don't remember off the top of my head.

 

it all depends on which motor you are talking about, race or street. The only motor I know of that spoon sells is not 265 whp, that's 265 crank hp. All the spoon motor has is balanced pistons and their "cams" as well as other balanced parts. Rev limit is not increased to 10krpm.

dee, the stock bore is 87mm on the f20, I guess that thing is just stroked to hell, stock stroke is 84mm

 

I did some searching and the crank isn't from an F23A because that engine has 97mm stroke. I guess they are using one of the Toda cranks because I can't find info on an OEM Honda 95mm stroke crank. I'll keep looking because I want to know who made the parts!

 

外人のターボ本田車はすごいやばいだよ！
>外人のターボ本田車はすごいやばいよ！

外人のターボ本田車は超ヤバイ！


[Modified by OEM PARTS MANIAC, 1:09 AM 7/25/2002]

 

very interesting..i will continue to look at this thread..

 

a thread started over at s2ki...

http://www.s2ki.com/forums/showthrea...threadid=72873

 

ya. but crate motors are only ment to last ONE race.

 

thanx for the attempt at giving me a japanese lesson but both ways are correct

 

You got it backwards, over square is bore bigger than stroke, under square is stroke longer than bore.

That is a pretty long stroke increase, so they aren't helping their rod ratio out much either. IMO, if I were to spend that much on an S2000, I would try and have Golden Eagle or Benson's resleeve and bore it out as big as it would go.

 

These aren't NHRA top fuel, CART, or F1 engines.
Race teams might take the engines apart and inspect them just to be safe, but they would last much longer than one race. It's not that hard to make the F20C make 265 crank hp. A quality I/H/E, cams and valvetrain with the stock redline can make that and still drive it home after an endurance race.

 

All I wanted to do was post some interesting info but as usual H-T members start an opinion war.

 

If I was actually coherant and cared about hondas, i would not listen to "rembrant" who can't spell his own name. Considering rembranDt has a "D"

 

say what????????

 

That was just somebody's attempt to correct a statement that was already correct!