Euro Drivetrain Mods

[Cranial]

Here's the review I've been meaning to post up for a while...
Late last year, I needed to change my clutch. So while I was at it, I did some modding to my drivetrain:

1. Lightweight flywheel (custom ground)
2. Exedy heavy duty clutch
3. DC5R LSD
4. J's Racing 5.1 final drive

The following is only my subjective feelings about these mods, I have not dynoed nor tracked my car since the mods.

The heavy duty clutch and flywheel combo works well but the clutch can be quite "sticky" meaning a smooth 1st gear launch is not easy without piling on some revs (~2000rpm). Below that, there is quite a shudder. In terms of acceleration, it's hard to tell as I changed my final drive at the same time (which in my opinion, does more than the flywheel in regards to acceleration).

The LSD is definately a good mod. Before it, there's this uneven right hand bend that I would accelerate hard through, and all I would get is understeer and wheelspin. Now, I can power through like a champ. The difference is quite dramatic in such circumstances where an LSD is useful. With normal everyday driving however, the presence of the LSD cannot be felt, and its usefulness under normal driving is questionable (yes, it's quite effective in the wet as well, but ultimately on the street, the tyres you have is of utmost importance).

The final drive gear set... probably has made the most acceleration difference in view of the other mods. It quite simply allows me to rev to the redline really quickly. But of course, with the change of the ratios, my top gear speeds have also changed. 1st redlines ~50kmh, 2nd redlines ~88kmh, 3rd... I haven't tried. What it does mean is that to get to 100kmh, I have to change to third gear - losing some precious time whereas a stock Euro can get to 100kmh in second. So getting to 100kmh to me seems quite similar to a stock Euro due to the gearchange, if only slightly faster. But I would be surprised if I haven't reduced my 0-400m times. Another thing to note is that my speedo is out of whack. My GPS would tell me I'm doing 110kmh, but my speedo would be showing 130kmh! My mech said its due to where the speed sensor is in the transmission and is due to the change of my final drive. So I have to be extra careful... AND I am racking up my odo faster than it ought to!

In summary, I am happy with the mods, considering I have no other performance mods whatsoever (eg no I/H/E).

[aaronng]

If you did all the mods at once, how do you differentiate between the improvements from the final drive and the lightened flywheel?

BTW, how much was labour to install all those mods?

[Cranial]

The flywheel I got was a custom grind, meaning its the stock flywheel ground down by a specialist. The total weight lost wasn't that much (I don't remember how much weight was shaved off, but I remember it wasn't that much). I couldn't afford to get one of the shelf at the time.

Labour? Hard to say, I'm good friends with my mechanic, and it was like a big package as I got him to put in a Cusco LAB II, Tein's, and some other misc stuff. He charged me one bill for all the labour, so I can't really categorise the tranny mods itself.

[aaronng]

Do you mind me asking the total price so that I can estimate? A PM is fine. :)

[Cranial]

I'll let you know once I find my invoice!

Has anyone else here got an LSD and/or changed their FD for their Euro? Or am I the only one at the moment??

[enkay]

wow congrats on mods!!
im not sure of any aussies that have gotten an lsd or fd, mite be some.
but seen some americans do it.
damnit makes me want to get a quaife lsd now =P.. but still gotta wait for some of my parts from japan 1st ;)

[EK Civic R]

How much you get LSD for??
Was it new or used?

I'm looking at getting lsd as well..

[Cranial]

My mechanic sourced a used LSD for $350.

[Chris_F]

Very interesting, thanks for the review. The final drive should definitely help 1/4 mile times because you won't be changing into fourth just before the line

[Suntzu]

Thats cheap for an lsd. id buy one for that.

Good review tho. Im pretty keen on LSD and lightweight fly. Dunno about a heavier clutch since ive only got a bit more power with I/H and mild jtune flash.

Changing final drive is interesting...

[Crapdaz]

in regards to drive train mods for the Euro, do CL7 drive train parts fit on our Euro? Please advise me. Thanks All.

[EUR003act]

in regards to drive train mods for the Euro, do CL7 drive train parts fit on our Euro? Please advise me. Thanks All.

yes... the 4.7 final drive and helical LSD from the CL7 will fit the CL9 :D

[aaronng]

You sure about the 4.7 final drive? I heard otherwise.

[EUR003act]

You sure about the 4.7 final drive? I heard otherwise.

im nearly 100% that the euro-r has the same final drive as the tsx? which form memory swaps into the euro fine?

[EuroAccord13]

im nearly 100% that the euro-r has the same final drive as the tsx? which form memory swaps into the euro fine?

Yeap, the final drive ratio of the CL7 is the same as the TSX at 4.76 and our Euros run 4.4.....

[aaronng]

Yeap, the final drive ratio of the CL7 is the same as the TSX at 4.76 and our Euros run 4.4.....

Driven tried to put in a 4.7 from a DC5R k20a but it didn't fit in his k24a box.

[EuroAccord13]

Driven tried to put in a 4.7 from a DC5R k20a but it didn't fit in his k24a box.


Maybe he didn't fit it properly :p but I highly doubt it as he is a man of vast knowledge..
Could be a different FD gear from the CL7...

[Crapdaz]

and in regards to flywheel and clutch etc... CL7 parts would be direct bolt on for a CL9 ? unless otherwise would they have a different set up ?

Thanks for answering my noob questions.

[ALN]

and in regards to flywheel and clutch etc... CL7 parts would be direct bolt on for a CL9 ? unless otherwise would they have a different set up ?

Thanks for answering my noob questions.

k20a parts from Dc5 is not same shape ,not sure about CL7, with CL9 stock clutch and flywheel. As far as I know only ACT and Exedy that make direct bolt on clutch for CL9 and comptech or fidanza for the flywheel, others than that you have to buy combo to fit it.

[EUR003act]

yeah as far as im aware, you need to buy both the clutch and flywheel to garantee fit (from DC5)... however, TODA informed me that the lightweight fly they do for the CL7/CL9 is a direct fit, no need to replace clutch...

[Suntzu]

Im getting pretty keen on a lightweight flywheel. I dont want to replace my clutch tho as its only got 40 000km on it.

Any suggestions on a good flywheel brand and where to buy?

Love to hear more feedback from anyone with these mods. cheers

[aaronng]

Im getting pretty keen on a lightweight flywheel. I dont want to replace my clutch tho as its only got 40 000km on it.

Any suggestions on a good flywheel brand and where to buy?

Love to hear more feedback from anyone with these mods. cheers

Cheapest good 1 piece cromoly flywheel is Exedy racing. If I had the money, I'd get a Toda dynamically balanced flywheel and clutch kit instead.

[curik]

AUDM DC5R flywheel+clutch combo FTW! Got them for $80 2nd hand.

Specs:

Flywheel: 6.9kg
Clutch Assembly: 5.0kg

Stock euro's clutch and fly weights are:

Flywheel :8kg
Clutch Assembly: 8kg

So the weight savings are 16kg- 11.9kg = 5.9kg

[Suntzu]

AUDM DC5R flywheel+clutch combo FTW! Got them for $80 2nd hand.

Specs:

Flywheel: 6.9kg
Clutch Assembly: 5.0kg

Stock euro's clutch and fly weights are:

Flywheel :8kg
Clutch Assembly: 8kg

So the weight savings are 16kg- 11.9kg = 5.9kg

That is a sweet deal. Let us know how it goes.

[BusterSonic12]

The final drive gear set... probably has made the most acceleration difference in view of the other mods. It quite simply allows me to rev to the redline really quickly. But of course, with the change of the ratios, my top gear speeds have also changed. 1st redlines ~50kmh, 2nd redlines ~88kmh, 3rd... I haven't tried. What it does mean is that to get to 100kmh, I have to change to third gear - losing some precious time whereas a stock Euro can get to 100kmh in second. So getting to 100kmh to me seems quite similar to a stock Euro due to the gearchange, if only slightly faster. But I would be surprised if I haven't reduced my 0-400m times. Another thing to note is that my speedo is out of whack. My GPS would tell me I'm doing 110kmh, but my speedo would be showing 130kmh! My mech said its due to where the speed sensor is in the transmission and is due to the change of my final drive. So I have to be extra careful... AND I am racking up my odo faster than it ought to!

.

what rpm do u sit on when cruising at 100km/h in 6th gear?

[Accord Basic]

Does anyone know all the gear ratio on CL9? I got the TSX ratio, is it same as our CL9 euros?

1st - 3.266
2nd - 1.880
3rd - 1.354
4th - 1.027
5th - 0.825
6th - 0.656
reverse - 3.583
FD - 4.764

[aaronng]

Does anyone know all the gear ratio on CL9? I got the TSX ratio, is it same as our CL9 euros?

1st - 3.266
2nd - 1.880
3rd - 1.354
4th - 1.027
5th - 0.825
6th - 0.656
reverse - 3.583
FD - 4.764
If you want the gear ratios for almost any car sold in Australia, go to: http://carsales.com.au/car-research/advanced-search.aspx

Here are the Accord Euro ratios:
Ratio 1 - 3.533
Ratio 2 - 1.880
Ratio 3 - 1.354
Ratio 4 - 1.027
Ratio 5 - 0.825
Ratio 6 - 0.659
Reverse - 3.583
Final drive ratio - 4.388