you might want to go with a Dunlap Direzza Z1 star spec or a Kuhmo MX for more dry traction, contisports just aren't that good at all really

What your 60' and 1/8?

Traps sounds like the 12s are very possible but something is holding you back. It may be the increased torque causing much needed traction to slip so your times will also. Practice your launches and consider a Quaife LSD later so your traction slip becomes minimum.

Honestly it just sounds like your rubber is letting you down. Upgrade the tires. Everyone is raving about Direzza Z1 star specs, I personally have not tried them but people say for both dry traction & cornering feedback they are one of the best if not the best tire out right now. Anything continental makes isn't that great, they just aren't a great performance tire brand.

Forged 18's with drag radials. Do it!!

I actually just laid down the quickest true street-tire pass on record for an E55...

11.5 @119 with a 1.67 60-foot on Toyo T1Rs in OEM sizes.

Definitely get some better rubber.

damn... awesome gains for the cost.

13.2 is what I ran recently with my mods..Kleeman ecu isn't 'broken in' yet.


Don't think it will get lower without SC. Though I've read posts that cams would bring it high 12's.

Is your E55 stock?

Thanks guys, for excellent info concerning the pulley upgrade. General question, will my ECU continue to "adapt" even though it has the Powerchip flash? I'm looking to do this pulley upgrade - thanks.

Yes, should adapt just fine, a software upgrade improves the performance but it doesn't eliminate the stock adaptability of the ECU, just changes certain parameters within the ECU itself (air fuels, timing etc).

Thanks much. Ordering pulley today...

Just give it a few laps around the block for the ECU to adjust. and go thought though the RPM range when you get your pulley installed

A few questions:

1) Is this crank pulley the same size as stock, just lighter?

2) Does it have the markings for how many degrees ATDC on the pulley?

3) Anyone else have dyno/track results before/after the pulley. You got some good gains and I appreciate the effort but you cant make a judgement call based on an n=1.

Thanks

1) yes

2) yes

3) yes, search

Thanks, I was so excited when I first read about it I just jumped to reply. I did find all the answers to my questions when I searched. Thanks again. May have to get one of these

What am I missing here. THe pulley is the same size as stock but since it's 3-4 lbs lighter you're seeing an increase in torque?

No real HP gains and I'm supposed to pay $500+ for this? And some of you think that this is a great mod?

WTF?

Why not Evosport underdrive pulleys for $3-400 instead and get approx. 12-15HP?

First off, nothing is cheap for benzes.

I am not looking for peak numbers, i'm looking for area under the curve.

I dont want to underdrive my waterpump, doesnt seem very smart to me. Its what keeps your engine cool

or the A/C, Power steering, it's heavier as is with bigger rims, and especially the Alternator! With all the electronics on MB's thats the last thing you want to produce less power, and if you have a system (SUB WOOFER for the newbes) fogetaboudit!

"meat under the curve" is FAR more important for the street & acceleration than some peak HP number. Plus efficiency increase pays for itself in gas savings, I HATE these gas prices... ugh...

Do you have the dyno sheets of this modification? I am looking to get one for my SLK350. I am looking for the dyno chart you are referring to but its no up in your post. if you have chart that would be nice. thanks