#32832 - 06/19/03 10:28 PM
CTR LSD in a stock b-series Si = UPDATE 3.0 finished!!!!!!!!!!!!!!!
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highR.P.M
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Registered: 04/12/00
Posts: 375
Loc: Florida U.S.A.
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#32833 - 06/19/03 10:50 PM
Re: CTR LSD in a stock b-series Si tranny?
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REDHCSI
Poster
Registered: 04/24/01
Posts: 310
Loc: Augusta, GA
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#32834 - 06/19/03 11:04 PM
Re: CTR LSD in a stock b-series Si tranny?
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highR.P.M
Jr Member
Registered: 04/12/00
Posts: 375
Loc: Florida U.S.A.
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Reheheheheeeeaaly?
The math doesn't lie. Now we have that cleared up, I guess if the diffs are the same size my questions will be answered. Anyone? BEULER?
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2000 FBP Si...
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#32835 - 06/19/03 11:28 PM
Re: CTR LSD in a stock b-series Si tranny?
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Night
Post Master
Registered: 04/25/00
Posts: 2833
Loc: houston, TX
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diffs are not the same. will need to do some trimming in your tranny, but it will go in. might outta consider the 4.785 FD while ur at it
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'85 Prelude 
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#32836 - 06/20/03 12:23 AM
Re: CTR LSD in a stock b-series Si tranny?
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Civic Power
Member
Registered: 01/07/00
Posts: 764
Loc: Southern Cali
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Si coupe/S4C transmission, you'll need to get the 4.40 final drive ring from a Type-R tranny..since the CTR LSD is larger in diameter than your stock Si's factory differential; which means the Type-R final drive ring is larger too, your Si ring is smaller diameter.
And you do not have the shave the tranny to make it fit the ctr uses the same housing as the si
_________________________
If in doubt, increase boost
440whp 22 psi
Sc61 Powered 
I have found that if you set goals, you might not reach them. If you don't have goals, you never get dissapointed.
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#32837 - 06/20/03 12:34 AM
Re: CTR LSD in a stock b-series Si tranny?
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Night
Post Master
Registered: 04/25/00
Posts: 2833
Loc: houston, TX
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#32838 - 06/26/03 08:45 AM
Re: CTR LSD in a stock b-series Si tranny?
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highR.P.M
Jr Member
Registered: 04/12/00
Posts: 375
Loc: Florida U.S.A.
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Emailed 'Katman' @ JHP here is his response:
I have a civic si (00 model) and want to swap the stock diff. with a
> CTR LSD. My research I have done via the WWW concludes the FD ratios
> are the same on both transmissions. Is this going to be a direct swap?
> Have you had any experience with a swap like this? Are there any tips,
> advice or tricks you can lend me or any websites you can refer me to?
> Are the LSD's for all EK9s the same (I would imagine so, but correct
> me if I'm wrong)?
well, I have friend who's done many tranny dissassemblies/reassemblies with numerous LSD's and final drive changes. He's did up my tranny a couple times, so he's my point of reference and proof of what works. And yes a CTR LSD will drop right into your Si tranny. Simply remove the Si diff and place the CTR LSD in its place. Nothing more is needed. I don't know of any sites that show a "how to" on LSD swaps..sorry..
>
>
> I would like to utilize an LSD in my civic. My theory is I will wear
> the front tires more even. The right side tires are totally bald while
> my left are worn halfway. I cannot afford to buy tires so often
> therefore I have concluded that an LSD will help me in my dilemma.
heh...yep, tirewear should be more even w/an LSD for sure.
>
>
> I am trying to get around changing the FD for now. First reason: I
> don't have the cash right now. Second reason: I do ALOT of HIGHWAY
> driving (school is 60+ miles one way for me).
ah.. ths stock 4.40 final drive should be left in then. That FD is made to be used with 14-15" wheels anways. if you went 4.785 final drive, you'll lose some MPH if you stick with 15" wheels....thats why Honda sells the 98+ JDM ITR w/16" wheels....because of the final drive. The mathematics of wheel size and gear ratio go hand in hand....if you didnt know...
>
> Thanks for all your help. BTW, Love the Pac-Man game on the site!
> Bad-ass.
haha cool....later!
I think it should be a direct swap.
_________________________
2000 FBP Si...
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#32839 - 07/25/03 12:41 PM
Re: CTR LSD in a stock b-series Si tranny?
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highR.P.M
Jr Member
Registered: 04/12/00
Posts: 375
Loc: Florida U.S.A.
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#32843 - 07/26/03 06:52 AM
Re: CTR LSD in a stock b-series Si tranny?
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RZFD
Post Master Supreme
Registered: 06/12/02
Posts: 24353
Loc: Fuck ya'll, I'm from Texas.
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Quote:
Cool! Keep us posted please 
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#32844 - 07/27/03 08:59 AM
Re: CTR LSD in a stock b-series Si tranny?
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highR.P.M
Jr Member
Registered: 04/12/00
Posts: 375
Loc: Florida U.S.A.
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Tranny is coming out tommorow. I should have it in by tuesday.
_________________________
2000 FBP Si...
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#32845 - 07/27/03 10:14 AM
Re: CTR LSD in a stock b-series Si tranny?
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MadtownSi
Moderator
Registered: 02/03/00
Posts: 4521
Loc: Madison,WI
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Quote:
Tranny is coming out tommorow. I should have it in by tuesday.
Very nice!!! I can't wait see how everything turned out! Take a lot of pics!! 
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#32847 - 07/27/03 02:16 PM
Re: CTR LSD in a stock b-series Si tranny?
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Beave0101
servant of egosgame
Registered: 02/13/02
Posts: 15941
Loc: San Diego
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Quote:
How much did you pay for that?
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#32848 - 07/28/03 08:47 AM
Re: CTR LSD in a stock b-series Si tranny?
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highR.P.M
Jr Member
Registered: 04/12/00
Posts: 375
Loc: Florida U.S.A.
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What kind of diff did you install on what kind of tranny?
My research has concluded the OEM EK9 LSD for the JDM S4C will fit in the USDM S4C. It is the same casing, gearing, ect. Being I am practicing to be an engineer, from my standpoint there is no benefit in making two different inner-diameter ring gears for the same gear ratio on the same trans. family. Look here, and here, here too. This is just a few pages.
Measured the bearings: 80mm*40mm*18mm. If you or anyone else can explain why a team of engineers would design two ring gears differently but have the same ratio, please do because I would like to know.
It would cost twice as much money just to design it.
_________________________
2000 FBP Si...
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#32849 - 07/28/03 11:13 AM
Re: CTR LSD in a stock b-series Si tranny?
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highR.P.M
Jr Member
Registered: 04/12/00
Posts: 375
Loc: Florida U.S.A.
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Also, if you click this you will find the OEM LSD that fits a 99-00 Civic Si. This is the Civic Type R LSD.
I have spoken to a rep at modacar. He states and backs the other information I have found; the Civic R LSD is a direct swap into the 99/00 spec Civic Si. Feel free to contact them, the number is listed.
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2000 FBP Si...
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#32850 - 07/28/03 11:22 AM
Re: CTR LSD in a stock b-series Si tranny?
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Mikey_b
Post Master Supreme
Registered: 04/11/00
Posts: 47099
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Quote:
Emailed 'Katman' @ JHP here is his response:
I have a civic si (00 model) and want to swap the stock diff. with a
> CTR LSD. My research I have done via the WWW concludes the FD ratios
> are the same on both transmissions. Is this going to be a direct swap?
> Have you had any experience with a swap like this? Are there any tips,
> advice or tricks you can lend me or any websites you can refer me to?
> Are the LSD's for all EK9s the same (I would imagine so, but correct
> me if I'm wrong)?
well, I have friend who's done many tranny dissassemblies/reassemblies with numerous LSD's and final drive changes. He's did up my tranny a couple times, so he's my point of reference and proof of what works. And yes a CTR LSD will drop right into your Si tranny. Simply remove the Si diff and place the CTR LSD in its place. Nothing more is needed. I don't know of any sites that show a "how to" on LSD swaps..sorry..
>
>
> I would like to utilize an LSD in my civic. My theory is I will wear
> the front tires more even. The right side tires are totally bald while
> my left are worn halfway. I cannot afford to buy tires so often
> therefore I have concluded that an LSD will help me in my dilemma.
heh...yep, tirewear should be more even w/an LSD for sure.
>
>
> I am trying to get around changing the FD for now. First reason: I
> don't have the cash right now. Second reason: I do ALOT of HIGHWAY
> driving (school is 60+ miles one way for me).
ah.. ths stock 4.40 final drive should be left in then. That FD is made to be used with 14-15" wheels anways. if you went 4.785 final drive, you'll lose some MPH if you stick with 15" wheels....thats why Honda sells the 98+ JDM ITR w/16" wheels....because of the final drive. The mathematics of wheel size and gear ratio go hand in hand....if you didnt know...
>
> Thanks for all your help. BTW, Love the Pac-Man game on the site!
> Bad-ass.
haha cool....later!
I think it should be a direct swap.
Jason is the man. Very little that guy has not done or seen.
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#32853 - 07/28/03 01:54 PM
Re: CTR LSD in a stock b-series Si tranny?
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Mikey_b
Post Master Supreme
Registered: 04/11/00
Posts: 47099
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Quote:
Quote:
Jason is the man. Very little that guy has not done or seen.
yea, he helped me out with my swap a few weeks ago...i'd still be going crazy with wiring if it wasn't for him.
He is a total OG when it comes to Hondas, B-series swaps, and JDM. After I finished this post, I went and looked back at old saved emails of Jason and I going back and forth. It's scary to look and see conversations concerning cool Spoon Sports parts or swapping B16B internals and see them dated 1998....back then no one had any idea it would get like this. It's totally insane now. Another Honda OG is Eric Bauer but I don't know what happened to him.
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#32855 - 07/28/03 04:27 PM
Re: CTR LSD in a stock b-series Si tranny?
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drifter57
Jr Member
Registered: 02/27/01
Posts: 734
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highrevs99,
i got the same ek9 ctr LSD from japandy, and had been doing research about the ring gear problem for some time before i venture to finishing the install. where were u able to find the b18c ring gear? i've been looking on HT and Csi for a USDM ITR ring gear to no avail. you know of anyone who's selling there's?
d57
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#32858 - 07/28/03 07:01 PM
Re: CTR LSD in a stock b-series Si tranny?
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drifter57
Jr Member
Registered: 02/27/01
Posts: 734
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yeah i checked the dealership, ~$180 for a final drive ring gear for the USDM ITR... kinda pricey, was hoping to get a used one from the ITR guys who swapped there's for the JDM 4.785 FD's...
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#32863 - 07/29/03 02:58 PM
Re: CTR LSD in a stock b-series Si tranny?
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highR.P.M
Jr Member
Registered: 04/12/00
Posts: 375
Loc: Florida U.S.A.
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Mine went together.
EDIT: Sorry guys. My mechanic thought his tranny guy was talking about my trans when he was really talking about another. It did not go together. See Aug. 1st
Edited by highR.P.M (08/01/03 07:29 AM)
_________________________
2000 FBP Si...
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#32864 - 08/01/03 07:52 AM
Re: CTR LSD in a stock b-series Si tranny, UPDATE 3.0
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highR.P.M
Jr Member
Registered: 04/12/00
Posts: 375
Loc: Florida U.S.A.
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UPDATE 3.0
When I posted the 99-00 Si ring gear fit on the LSD, the trans tech was discussing another trans w/ my mechanic. A little miscommunication, no big deal. I corrected my post, and apologize to highrevs99 and anyone else who deserves such.
So what it boiled down to was a new ring gear and bolts from Rick Starr Acura in Fort Pierce, Florida. 2000 spec Integra Type R was good enough for me. Part number: 41233-P80-V00, 66 teeth. Next day shipping via FedEx to get my car back on the road, priceless.
So the trans was put back in last night. My mechanic Elton Martin (PM me for a reference if you are local) did an awesome job.
I took it out this morning already. This car is FUN, FUN, FUN. I am going to the skidpad right now. I will prolly need a new clutch in a little while but ohh-well. If anyone could take a minute and check my bio, clutch recommendations would be greatly appreciated.
Also, if your Si is making a click sound on start-off, modding to an LSD could solve the problem. Mine used to click every time. I took a look at the old diff; when I moved the gears, I heard the sound. Did not click this morning. Search tech-support forum for more info on the problem
I am finished modding this thing for now. Maybe a JDM 98 spec 4-1 header with the heatshields, proper b-piping, cat, ect, is in my future.
Thanks to everyones input on this thread. Additional information/comments are welcome!
_________________________
2000 FBP Si...
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#32865 - 08/01/03 11:53 AM
Re: CTR LSD in a stock b-series Si tranny, UPDATE 3.0
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highR.P.M
Jr Member
Registered: 04/12/00
Posts: 375
Loc: Florida U.S.A.
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There were a bunch of satellite bch police at the skidpad so no fun was had (yet).
Sooo, I took a drive to Orlando instead. This is by far one of the best mods I have done. The car handles very, very good now. I can almost feel the torque transfer going around corners.
I do not know why honda didn't put an LSD in this model to begin with. It just seems so practical.
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2000 FBP Si...
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#32866 - 08/01/03 11:59 AM
Re: CTR LSD in a stock b-series Si tranny, UPDATE 3.0
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AzSi22
Major Member
Registered: 10/31/99
Posts: 1386
Loc: Tucson, Arizona
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Quote:
I do not know why honda didn't put an LSD in this model to begin with. It just seems so practical.
Its because its not a Type-Aahhh.
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#32867 - 08/01/03 12:59 PM
Re: CTR LSD in a stock b-series Si tranny, UPDATE 3.0
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highR.P.M
Jr Member
Registered: 04/12/00
Posts: 375
Loc: Florida U.S.A.
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Quote:
Its because its not a Type-Aahhh
LOL
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2000 FBP Si...
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