transmission change

[jyh888]

Hi guys i need some advice and opinions on the following issue:

im looking at preparing a cl9 for track and at the moment i am unfortunately stuck with AT transmission. Due to the longer gear ratios of the CL9 i am thinking of changing the transmission to one with shorter gear ratios but i do not know which transmission gearbox will be suited for the K24 engine. I also want a gearbox with an LSD. Any opinions on which gearbox to use? Or should i just use a CL9 manual gearbox and add flywheel + clutch and LSD? but which LSD should i use?

So my 2 options at the moment are:

1) Keep current car and change the transmision (im aware that there is a lot of labour involved and my budget will be no more than $3000-4000)

2) Purchase a manual cl9 - if i go this route, will it involve changing the whole gearbox or can i get away with just changing the internals?

Open to any opinions/advice thx

and any thing i should consider to prepare a race-car cl9 for track? so far have injen intake, toda headers + hiflow cat (running stock catback), suspension mods include coilovers, front strut, and rear sway bar.

[felixd]

i would go for the type r gearbox with LSD. im not sure where to get them but its better than the stock CL9 manual transmission with internal mods.

[tony1234]

Hi guys i need some advice and opinions on the following issue:

im looking at preparing a cl9 for track and at the moment i am unfortunately stuck with AT transmission. Due to the longer gear ratios of the CL9 i am thinking of changing the transmission to one with shorter gear ratios but i do not know which transmission gearbox will be suited for the K24 engine. I also want a gearbox with an LSD. Any opinions on which gearbox to use? Or should i just use a CL9 manual gearbox and add flywheel + clutch and LSD? but which LSD should i use?

So my 2 options at the moment are:

1) Keep current car and change the transmision (im aware that there is a lot of labour involved and my budget will be no more than $3000-4000)

2) Purchase a manual cl9 - if i go this route, will it involve changing the whole gearbox or can i get away with just changing the internals?

Open to any opinions/advice thx

and any thing i should consider to prepare a race-car cl9 for track? so far have injen intake, toda headers + hiflow cat (running stock catback), suspension mods include coilovers, front strut, and rear sway bar.

Been covered before.Sell it,put your $3K and buy a manual.then change the internals,flywheel and clutch.Take headers,suspension mods off your auto before you sell it and use them on the manual.

[integral90]

I wouldn't recommend the DC5R gearbox for the stock K24a3, the ratios would be too short to make use of the Euro's wider powerband. People forget that the speed a DC5R produces out of each gear is much more than the Euro would. For instance; if the DC5R did 90km/h in 2nd, the Euro would only do 76km/h with that same 2nd.

A much better gearbox in my opinion would be the CU2 Euro's. It uses the same redline but has a MUCH nicer 2nd etc.

As far as track-prepping the 'race car', most of the work happens after the track. Before you go to track buy some brake/clutch fluid, engine oil and (if you're really pedantic) transmission fluid and coolant. After the track session swap all the fluids to fresh, new ones. Also it might be worth investing in spare wheels with some cheaper tyres on them to use at the track.

[jyh888]

thanks for your input guys. However, i have seen many k24s with a type r gearbox for example the EG civic from JDMyard has a similar set up.

So if i used a CU2 gearbox, can i jus swap the internals? or does it need a full gearbox replacement. And as i mentioned, i would also like to install an LSD, which one should i use and how should i go about integrating that with a Cl9 manual gearbox. I believe changing to a JDM dc5r lightened flywheel and HD clutch is a very good investment.

[jyh888]

just wondering if anyone has used another gearbox in an euro? If i need to change the whole gearbox than i might aswell do a conversion and pay for labour all at once, if i do, do i need to change ECU?

[integral90]

thanks for your input guys. However, i have seen many k24s with a type r gearbox for example the EG civic from JDMyard has a similar set up.

EGK24A revs to over 8000rpm, that's why that gearbox works so well for it. There's a big difference in wheel speed from 7200rpm to 8000rpm.

just wondering if anyone has used another gearbox in an euro? If i need to change the whole gearbox than i might aswell do a conversion and pay for labour all at once, if i do, do i need to change ECU?

PM Justin, EUR003act. He swapped the USDM Civic Si gearbox into his car. From what I recall that's basically the same box as the DC5R but with a much nicer cruising 6th.

Also you don't need ECU to change manual gearbox.

[jyh888]

EGK24A revs to over 8000rpm, that's why that gearbox works so well for it. There's a big difference in wheel speed from 7200rpm to 8000rpm.



PM Justin, EUR003act. He swapped the USDM Civic Si gearbox into his car. From what I recall that's basically the same box as the DC5R but with a much nicer cruising 6th.

Also you don't need ECU to change manual gearbox.

thx integral. So do you think it would be cheaper for me to just convert the car to manual rather than buying a manual (since if i am changing the gearbox i would have to pay labour to remove the gearbox and will most likely change flywheel and clutch). My budget for this is no more than $3-4k (including labour and parts)

I will PM EUR003ACT, or if he sees this thread he can reply

Hows your car doing integral? What are u plans for the future? found a suitable ecu yet?

[aaronng]

So when are we all going to have an Euro trackday?

[aaronng]

Also you don't need ECU to change manual gearbox.

If he's trying to swap from an auto gearbox to a manual, then he will need a manual ECU.

[integral90]

thx integral. So do you think it would be cheaper for me to just convert the car to manual rather than buying a manual (since if i am changing the gearbox i would have to pay labour to remove the gearbox and will most likely change flywheel and clutch). My budget for this is no more than $3-4k (including labour and parts)

I will PM EUR003ACT, or if he sees this thread he can reply

Hows your car doing integral? What are u plans for the future? found a suitable ecu yet?

You're better off buying a manual Euro if you want to track the car. And I don't think you'd squeeze into your <4k budget otherwise. Message E_Honda, he has a manual looking to swap for an auto. Could work out well

Mine's going alright, no problems to report. The car is just really annoying to drive with the torque hole in the midrange, it's really really torquey down low and then you get to about 4000rpm and it starts to drop off before coming back way later. It is good though when you're cruising, you get a big surge of torque when you put your foot 1/2 down.

I'm thinking an Adaptronic stand-alone might be a good option. Right now it's mostly funds that are stopping me from doing it. I'm hoping Adaptronic can arrange something with me as a test-rat

The only things left to do really are install coilovers, the ECU and the 06+ TSX cams for a bit more punch. Also the idea of swapping the CU2 gearbox internals into mine is pretty attractive. Ideally I'd like the car to make about 150kW peak and run 14.2-3 on the quarter mile

If he's trying to swap from an auto gearbox to a manual, then he will need a manual ECU.

Smartass

[jyh888]

You're better off buying a manual Euro if you want to track the car. And I don't think you'd squeeze into your <4k budget otherwise. Message E_Honda, he has a manual looking to swap for an auto. Could work out well

Mine's going alright, no problems to report. The car is just really annoying to drive with the torque hole in the midrange, it's really really torquey down low and then you get to about 4000rpm and it starts to drop off before coming back way later. It is good though when you're cruising, you get a big surge of torque when you put your foot 1/2 down.

I'm thinking an Adaptronic stand-alone might be a good option. Right now it's mostly funds that are stopping me from doing it. I'm hoping Adaptronic can arrange something with me as a test-rat

The only things left to do really are install coilovers, the ECU and the 06+ TSX cams for a bit more punch. Also the idea of swapping the CU2 gearbox internals into mine is pretty attractive. Ideally I'd like the car to make about 150kW peak and run 14.2-3 on the quarter mile



Smartass

kool thanks heaps integral, your help is much appreciated. im looking to get a 2nd euro (the sport edition) in manual very soon as my parents need to buy another car and since the euro is such a great drive, y not have 2! Or my other option is a dc5r, but not a fan of the aesthetics... Lol how often do you hit over 4k rpm on normal street driving tho? lol. I really want to feel what the car is like with the RBC, u reckon it would work well with the tsx cams? and where can we source it from? havent seemed to find any for sale...your plan sounds very good will be waiting to see it! what coilovers did u get? have u tracked ur car again? with all these mods your time should improve heaps, 1.16s? possibly