Here's the situation: sometime in the relatively near future (next few months, maybe winter) I'm gonna be throwing a K24A2 (TSX) engine in the POS. Why? Because I'm a glutton for punishment, and I want to be even more embarassed when RJ rolls me with his beat LS. Anyway, I'm trying to figure out which transmission to run. LSD will be thrown in if there's not one installed already, so that's not an issue. I've played with the gearing calculator for hours and come up with all sorts of things. Final drive is also not much of an issue, as I'd have to have all that apart anyway to install the LSD. The really big question is: 5-speed or 6-speed? The big attraction of the 5-speed is that they're WAY cheaper.

I'd prefer real world experience here, but since I know there aren't many people that HAVE experience with this, I'm open to all ideas

 

hey adam!

thats gonna be a fast ride when you are done with it! no comparison, a B20 to a K24!!!!

since you are going K24, you are gonna have beaucoup torque; i don't think a 6 speed will be a neccesity... i think a 5 speed with a 4.7 FD and LSD would be really good...

that being said, my K20A2 H1 hatch has a 6 speed tranny with a 5.0 FD; man o man is that sweet! that combo works perfect for the 2 liter motors (which can rev).

i think, since you can't rev as much with the K24, that a 5 speed with broader gears and a more gentle FD would be pretty good......

have fun!

todd

 

Thanks Todd, I appreciate the help!

 

Adam,

I agree with Todd

Jason-
who loves his present torque, but can't imagine what a K24 bottom end would feel like

 

Here's a random question for both of you, since I know you're both VERY familiar with the HC rulebook: Is there a 2.2L restriction for H1? I thought Bernardo out in CA was running the K24 in H1, and I thought Corey's Prelude motor was a 2.3L, which makes me question that rule.

 

Adam,

The rule presently imposes a 2.4L max for hybrid vehicles. The NSX is obviously larger, but is considered a "restricted preparation vehicle". Please see section 9.3 of the HC rulebook for more info.

http://www.nasaproracing.com/r...e.pdf

 

hey adam!

bout time you built that up for battle!


remember, the K24 has to carry even more weight than the K20....

just fyi.....

extra weight sux *****!

todd

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sscguy &raquo;</TD></TR><TR><TD CLASS="quote"> and I thought Corey's Prelude motor was a 2.3L, which makes me question that rule.</TD></TR></TABLE>

Err, nope

Stock H22 stroke, with .25 overbore = 2.175 cc or something close, haha..

If I went w/ a 95mm H23 crank it would = around 2.268 or something
98 mm F23 crank = 2.38 or something..

 

What a great thread... I also have been playing with the #'s of installing a K24 in an ITR chassis.. I will be sitting here " quietly watching"..

 

i have a k24a2 with 02-04 type s tranny i like it alot , but if i was to change anything i'd make 3 gear a bit longer

 

seek, just so you know an Si tranny would carry 3rd ~10mph more Sure, your top speed wouldn't be 150mph+, but it should still be sufficient for anything you really need to do (with a 7500rpm redline, 147.2mph is the top speed with the Si tranny).

 

Just something for you guys to ponder.

http://www.importautosalvage.com/repairables.asp


Possible tranny there.





Modified by CRX Toad at 4:02 PM 6/23/2006

 

One other question for the K-people: stock ITR LSD, adequate for track use, or should I consider something else? The DC2 LSD isn't bad, but can certainly be improved upon, so based on that I was thinking of a KAAZ unit.

 

Adam,

I'm thinking about the same thing right now in the EP3. K24A2, stock 5 spd tranny. I'll let you know how that goes.

-Victor

 

Yeah, please do, and let me know if you get it done soonish, I'd love to come down and get a ride!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sscguy &raquo;</TD></TR><TR><TD CLASS="quote">One other question for the K-people: stock ITR LSD, adequate for track use...?</TD></TR></TABLE>
Are you going racing? I've been on the track a few times now w/my K motor and DC5 ITR LSD. It works fine...but there have been a couple of occasions where I might have received some benefit from an axle that worked off throttle.

I am by no stretch of the imagination any kind of good driver, so if this old man is thinking about wanting it to work off throttle, it might be something you want to think about.

My car is a six speed USDM Type S tranny w/DC5 ITR LSD and ITR LSD final drive. I think it's 4.8.

 

That's exactly the kind of info I wanted to hear, George. I MAY be racing with this eventually, but even if I'm not, since I'll be putting the LSD in, I want it to be worthwhile. With my B-series engine right now, I kind of regret not waiting a little longer for something other than the stock ITR one to pop up for track use. Given that, I'd like to do it right this time around, especially since this would be a more permanent drivetrain setup.

 

I drive a 92 Civic with a tsx block, rsx type s head, type r cams, 2006 Civic Si manifold with type r TB and type r LSD tranny.

I don't think it would be a good idea for road racing to use a 5 speed. Yes, the torque is good but depending on your tune and exact motor configuration you might have to choose between falling out of vtec or more power on 4th-5th gear..

The really beauty of the 6 speed with the 2.4L is that even if you are not in the ideal gear, it is still going to carry you out of the corner. I constantly rev my tsx to 8200 so I don;t think that is a big deal. If you are planning to race a k24a but limit it to mid 7K redline... don;t do it. It is going to frustrate the hell out of you because the motor will not have enough time in VTEC range

 

Varo's old K20 car uses 5 speed and he won few races!

Some people prefer 5 speed and some prefer 6 speed.

 

ot: I just blew my diff. Anybody know of a k-series trans w/ lsd for sale?

 

Nikos, just so you're aware, I don't doubt the advice you gave me, just looking for all the information I can get

And Andrie, do you mean "he won A few races" or "he won few races" as in not many?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Andrie Hartanto &raquo;</TD></TR><TR><TD CLASS="quote">Varo's old K20 car uses 5 speed and he won few races!

Some people prefer 5 speed and some prefer 6 speed. </TD></TR></TABLE>

Yes, you only need 3 gears to beat a B series J/k

That is good to know some people are having success with it

 

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

And Andrie, do you mean "he won A few races" or "he won few races" as in not many?</TD></TR></TABLE>

Let me re-phrase. He was the SoCal H1 Champion in 2004

 

im gonna play off of some bseries experience for ya...Id say run the k24 with the 6speed...at the end of the day, no matter what, acceleration is 100% dependent on gearing, period, end of story. With that said, if two are of equal weight, power, drag, etc, and only differ from gearing, the more agreesive of the two will out accelerate the other. I understand its not ideal having a low revving motor with an agressive tranny, however, in the end it will be a quicker car. I have some experience with S4C (B16) trans on low revving LS motors. It seemed a mismatch until it was compared to an LS with stock gear box. There simply isnt a comparison between the two. So, I say stick a 6speed in there...

 

FWIW, a buddy of mine has a DC5R, (dc5rk20a on here) hes had problems with his 6spd...and he runs his pretty hard...but alot more than just one weekend a month for 1 or 2 races. He is having problems with his scynchros and such. He also has rebuilt his motor due to lack of oil starvation. get the trap door oil pan

on the question of the 6psd or 5spd, I would recommend the 5spd. the 6 speed is lighter yet has one more gear. something in there has to be a little....