eclou

In the land down under, do you have cats? If you do, then the AFR readings are only accurate if measured pre-cat. Oxygen levels post cats are not indicative of the true fuel trim of the car

stephens

We measure lambda at the first O2 sensor. The difference between the 1st and 2nd sensor and tailpipe is nominal.
On dyno runs we measure AIT pre and post cooler, oil temp, water temp, left & right lambda pre cat, left & right lambda after cat, lambda at tailpipe, engine loadand a few others parameters.

M5KILLR

so is that approx 625 crank hp with cats??? an increase of 155hp for 8,000???

stephens

Yes, that's about right.

Signal

man, i sure hope this kit is around in 4 years when mine is out of warranty.. I dont have the ***** to do it now..

Maybe soon I will be rich enough to not care and do it anyways...

otoupalik

Stephens,

Looks great. Nice to see that we are not the only ones looking to provide a good value to these owners.

One question, is the crank pulley dampened? Or is it just one piece billet?

Thanks

Brad

box986

I am suprised that headers on the E55 can post that much gains in power, I dont remember seeing that on the C32.

AMGe55

If you look at the original equipment headers on the e55 they really don't look very good and new headers seem to help very much. Also as Stephens has shown the intercooler location is not ideal and greater cooling capacity for the intercooler makes a big difference.

vraa

Stephens, earlier you wrote that the headers are equal length, however the headers in your picture don't appear to be so. I'm lost man. Can you tell me what equal length supposed to look like?

And the pulleys you are selling; you mention that they run at a lower boost than that which your dyno shows on your car right? So what does someone get for 8k?

stephens

We do both styles. Our billet unit is lightened and dynamically balanced, which I believe is the best solution. Without entering into the age old engineering debate we also add a ring to the standard damper on a changeover basis for those who prefer it.

stephens

vraa
As clearly stated earlier, the 438kW - 590rwhp result is not representative of what a customer would see. What we are selling is a 120-140rwhp increase.
We do have a higher specification kit, but it requires replacement of the front section of the exhaust system along with the higher boost, as per the posted dyno run, but at this stage this system is not for sale.

vraa

Ahh! I gotcha man, this is what happens when you become a post *****, you just hit reply

When do you expect the next stage to be on sale?

stephens

Not for another 6 months. I want to run it on a car for a while, then pull the motor down to see what effect, if any the higher boost has.

cte430

have you been able to check what affect this kit has had on a car?

stephens

Yes
The car has been running with a boost kit for almost a year now.
I will be re-installing the high boost kit on a new car next month, as it looks like this one has been sold.

Jon200

Can't wait for a big fat E55 to crack into the 10s

otoupalik

Stephens,

I would be very careful with a billet piece. We have tested them for a long time, and have had every version or alu. (inc. 7075) fail over enough time due to the lack of enough grip on the keyway as designed by MBZ. Without some type of dampening on the piece, you may have problems that you don't know about yet. You should remove the pulley and inspect it to see.

Thanks

Brad

stephens

We don't use aluminium, it is steel billet. Aluminium will fail as you have suggested.

GLisella

Have you done any of the mods you speak about on the coupe?

stephens

Which coupe?

sticky2

Stephens, how much power can the stock e55 internals endure? Is 600 rwhp out of the question? What is the limit on this motor?

theboogers

stephens what do you offer that will be used to increase power for the sl55? thanks

stephens

Given we are already above AMG V12TT 65 power numbers I think this is pretty much the limit. The drivetrain is the limiting factor now.

stephens

A variation on the same kit is available for CL, SL and S55.

sticky2

Can the drivetrain be strengthened to accomodate more power?