Here is the thread in Classifieds: https://mbworld.org/forums/engine-pe...nk-pulley.html

Price bump!

$600 shipped!

Hey if i were to install this on my stock c32 would I need any tuning?
Thanks

You won't need tuning, but it is recommended that you get it. Not only will it optimize the engine fuel and air maps to run with the pulley, but also give you a good bump in horsepower!

However if you don't want to tune it and just have the pulley it won't do any harm to your car as far as I know. Majority of the time the pulley was on my car I didn't have a tune for it and the car did just fine!

Personally, I think you will need tuning. Before I had a tune with my 185, I got many Lean condition CEL's which could lead to serious trouble.

But that's just MY experience.

Never had any CELs or heard of anyone having them due to a pulley with no tune up to this point.

With no tune, heavy, repeated pulls in the upper reaches of 3rd and 4th gear will eventually start melting stuff (like pistons and exhaust valves).

If this car had a MAF sensor, i wouldnt worry so much about it (as load is more a function of grams/minute of airflow). but it doesnt. AFR calculation through basically just O2 sensors and a MAP sensor relies heavily on what the good folks at AMG write onto the Bosch 2.xx ECU (not a particularly sophisticated ECU) and injector pulse-width-modulation (fuel-flow rate in MSs) is calculated at various preset rates of throttle position, RPM and speed density tables.

A tune is a very good idea. Its just too expensive of a motor to skimp on the tune.

Are you serious, "melting stuff"? Our pistons and cylinder valves are made of aluminum, which means their melting point is 3600F.

If for some reason the engine temp reaches a certain level the car will disengage the SC, if that doesn't solve the problem it will go into limp mode. 110F was the highest I have ever seen my coolant get to.

bottom line is that - on Planet Earth it's physically impossible to start "melting stuff like" internals of an M112 motor.

It would be very bad, if our valves are made of aluminium.

i think some of the guys on the e55 board might disagree with you on melting stuff. the s/c will only kick out if the i/c temps reach high levels. lean conditions wont shut the s/c down

<--- has previously destroyed 3600° Fahrenheit pistons.
Philosophy professor? Seems a metallurgist with a clue or any SAE/Mahle/Kolbenschmidt forensic expert would prove a far more credible source from which to opine the nature of physical sciences in this instance. :p:

Running ‘em lean with too much spark advance during extended WOT has written off several AMG members’ hypereutectic pistons and/or their sodium-filled exhaust valves. Personally know of a few who were too embarrassed to even post said mechanical failures. Hard to deny that a properly fabricated 185mm pulley (with appropriate accessory drive setup) is swell for most point and shoot encounters - when correctly tuned.

kindafast- know you’ll find a buyer for the 185, and best wishes with your stout Z06.

Thanks Splinter!
Knew I shouldn't have gotten involved haha.

Ok, my Physics professor would equally suffice. I say philosophy because of the logical fallacies of the statement i quoted, as it is, indeed, physically possible, on "planet earth", to melt aluminum; as evidenced by the pistons being in their current shape.

My experience is that a modded car, C32/SLK/SRT-6 (i.e. pullied) will tend to run lean, all other factors being equal. IN fact, when I installed my Code III pulley (Brandon's first pulley to a customer outside of friends), my car was indeed running lean after the install. Jerry did a tune and it immediately made a difference in the vehicle. So, to answer the question, I believe a tune is imperative with the crank or the SC pulley. I'd rather run rich than lean any day.

As an aside, the Kleeman cars (S7 and S8) C55s also tend to run lean until they retune them to dump a whole bunch of fuel to prevent catastrophic failure!! Then, they tend to run on the rich side.

I rarely race my car if even at all... I got a reckless driving ticket when I first bought this car and i don't feel like going back to jail and having my car impounded again so yea.
I would only WOT it once in a while just to show my friends, other then that its going to be a cruiser.
Would I still need a tune??
If you havent sold it yea let me know thanks.

Sold!

If you do buy one get a tune man.