chawkins2001

I dig some digging and talking to the gods, and I will jump at minimum to a 3.27

A 3.55 would be optimal and could back that down by running a taller slick if needed. with 711rwtq on tap, coming out the hole with either a 3.27 or 3.55 would be something to the effect of:

blackbenzz

I believe they offer 3.23 and 3.55 gear options. I've also heard they break when you put real power to them. The smaller the teeth the weaker they are.

You are not taking into consideration traction and breaking other parts if you do hook. That 721wtq will be alot higher with a gear in it. I will be taking baby steps. If you hook and don't break (assuming no problems with tcu tuning) then it will be a great mod. I don't know why the E55 guys aren't all over this. Probably best bang for your buck after pulley/tune

chawkins2001

I am going to do it brotha, based off my calculations entering our gear ratio's for 1-5th gear, and using my current 255-50-16, which is close to 26" tall tire, with a 3.23 gear is looks like this:



The switching to a MT ET Street 28 x 11.50-16 (28" tire), the calcs look like this:

chawkins2001

What I would do is pick up another set of steelies, and have the 28" slicks on there, switching out at the track so see what works best.

Shifting into 4th at 115mph vs.124mph could make a vast difference, sure the 26" tall Hoosiers would come out the hole faster and harder, but I would be afraid the heat generated from going into 4th at 115mph could kill my top end considerably.

e55amgrocket

Geez man trying to take my crown already lol. Me and Ahmad have talked about it ALOT but i'm just worried about it not working like we think it will. I remember being 16 and changing my 2.73's gear out to 3.73's and thinking wow this is it. Then after a change up to 4.30's i said wow now this is what i was after. A few years later with alot more power i was back down to 3.73's then 3.55's and finally 3.31's before getting the car dialed in. We make alot of torque and power so theres a fine line that we need to find to make it work good. The other problem i think about it how slow the shift to 4th is and where in the power band does that put the engine after the shift

stevebez

OK, anyone here personally got a 3.06 or higher to work software wise?

adianaty

Craig - Given you have a dyno curve for the car, try to instead plot via excel the vehicle speed vs power for each of these combinations and see the area under the curve assuming a 130 trap. Looking at vehicle speeds directly will be misleading since with the 28" tall tire, you will likely be on the wrong side of your power band for a longer period of time. Taking the example above you will shift into fourth at 4700 rpm and trap at ~5200 which doesn't sound so great while adding in another shift. At least with the 26" you will be trapping at 5700. The tail end of the quarter is when you need to but the power down so make sure you won't hurt it but help. If you want, send me your curve and I'll put it together for you.

chawkins2001

Sent you a text homey.

chawkins2001

After running some numbers, and what works best with my combo, I am going with a 3.23 gear.

stevebez

Guys, a word of advice, get the software sorted first before u even try this.

chawkins2001

Jerry gave me the green light on the TCU.

chawkins2001

You can also use this excel chart to get a basic run down of what each tire/rear gear would yield:

http://www.diffsonline.com/techinfo/index.shtml

99lightning

any idea how much those gears are? id all for doing the small tricks that make sence.

PACougar

I believe I paid 550 for the gears and I put all new bearings in my diff when we did it.

99lightning

yea thats not too bad

BI-Performance

http://www.shophemi.com/p-2193-hemi-...onion-323.aspx

Might as well do the Wavetrac LSD while you are at it

KLR CLS

Glad to see somebody finally doing this. Knew it could be done.

blackbenzz

It's been done and works with Jerry tcu tune on Clk55

PACougar

The funny thing is Richmond didn't know the gears would work, I had to have them mic. it all out and send me the sizes so I could compare it.

Celicasaur

What year is your E55? ^^^

Was it just a case of installing the gearset and having the TCM programmed?

I was planning to get a pulley and tune for xmas, but I think I'll do this instead now!

PACougar

That's all there is to it.

Celicasaur

Superb. I know what I want for xmas now then!

Please make some in gear pulls and capture it on video for us...

Jbell

Can anyone confirm that this would work on a w208, particularly a CLK430?

I have a 2.87 that i want somewhere around 3.55

cm60k

You can put 3.55 if you have a 00 to 02 models with Tiptronic shifter only,

and you need to reprogram your TCU as well,, our friend "2PRECISE" did that with his CLK55.....

https://mbworld.org/forums/clk55-amg...rsion-kit.html

ZAYED,,

chawkins2001

Yes