77mm Fixed Supercharger Pulley & Eurocharged Tune
I really hope Eurocharged will track down the hiccup/lean-spike issues ready for the next summer season. Then i will also pull the trigger on that thing.
Just dont forget to stay on top of and monitor your IATs! Will be getting the car on the dyno soon and will report my findings accordingly. For those who have no experienced the fixed pulleys, your missing out on alot of fun and a Schit load of smiles from your buddies riding along with you. Be warned that you may need to install a neck brace into each seat of the car and get use to the words Hooolyy S*** and OMG What The F***
i know there have been quiet a few threads on this topic but just thought id share my experience for the fence sitters and my hopes that all of Jerry's time and effort doesnt go to waste and that the TB issue is ironed out for those in a difficult situation wanting to run a Fixed Pulley.

The Best of Mercedes & AMG
If a tuner just could make those tunes bulletproof so they work without issues...


Any good tuners in the area? I see on EC's webpage pulley and tune is $599, what does their tune consist of just a basic tune I can install or load myself or how does it work? Still learning here be patient with me!
Of course this is just my 2 copper, YMMV.
Any good tuners in the area? I see on EC's webpage pulley and tune is $599, what does their tune consist of just a basic tune I can install or load myself or how does it work? Still learning here be patient with me!
Last edited by AMGAffalterbach; Aug 26, 2015 at 01:25 AM.
I fundamentally agree with everything he said, again I would pay attention more to people like these (CTSV_OR_E55) because they have modded cars and have been around for a long time. I drive a stock E550 so I'm just sharing the knowledge those who are modded and dragsters have imparted upon me. But there are a lot of rules of thumb that hold true for any car, and in my opinion protuning is better and leaving the car as stock as possible while making sure you have the best supporting mods for the power levels you do want to do will serve you well in the long run. If it isn't broken, don't try to fix it.
From what I understand, stock injectors are fine, but a lot of people tend to do fuel rail upgrades as when you get to higher hp levels delivery/starvation can become an issue for certain cylinders, specifically cylinder 8. Stock injectors can go above 80% duty cycle on a stage 3 car (according to adianaty), so at that point it would be wise to upgrade, but stage 1 you're likely well within safe limits. Can't find much common knowledge or widespread info on flow rates of stock E55 injectors, but from what I can gather the Bosch 52lb/hour 550cc High Impedance Fuel Injector set is the common upgrade. A lot of guys here tend to do "looped" fuel rails, but my knowledge of that is limited to my arm-chair expertise. It also depends on the production year of your car and the injectors you have from the factory, apparently the stock black injectors from earlier M113Ks are 38-39 lb/hr @ 3 bar and the later light-blue injectors are 44-45 lb/hr @ 3 bar, with the cutoff being the 2006 E55 AMG model year. So I believe you have the lower flow injectors in the 2004 model year. But again, I'm drawing from only a few scarce sources.
Depending on mileage too - before you mod - it would be a good idea to change out your supercharger oil, I think that's something a lot of E55 owners (at least the ones I know) overlook, but isn't something that is regularly dealt with through maintenance. It's a pain in the ***, but I suggest searching more about the procedure since there are write-ups on it. Mobil1 Jet Oil II is relatively cheap as you only need 1 quart.
Last edited by AMGAffalterbach; Aug 26, 2015 at 05:42 AM.
From what I understand, stock injectors are fine, but a lot of people tend to do fuel rail upgrades as when you get to higher hp levels delivery/starvation can become an issue for certain cylinders, specifically cylinder 8. Stock injectors can go above 80% duty cycle on a stage 3 car (according to adianaty), so at that point it would be wise to upgrade, but stage 1 you're likely well within safe limits. Can't find much common knowledge or widespread info on flow rates of stock E55 injectors, but from what I can gather the Bosch 52lb/hour 550cc High Impedance Fuel Injector set is the common upgrade. A lot of guys here tend to do "looped" fuel rails, but my knowledge of that is limited to my arm-chair expertise. It also depends on the production year of your car and the injectors you have from the factory, apparently the stock black injectors from earlier M113Ks are 38-39 lb/hr @ 3 bar and the later light-blue injectors are 44-45 lb/hr @ 3 bar, with the cutoff being the 2006 E55 AMG model year. So I believe you have the lower flow injectors in the 2004 model year. But again, I'm drawing from only a few scarce sources.
Depending on mileage too - before you mod - it would be a good idea to change out your supercharger oil, I think that's something a lot of E55 owners (at least the ones I know) overlook, but isn't something that is regularly dealt with through maintenance. It's a pain in the ***, but I suggest searching more about the procedure since there are write-ups on it. Mobil1 Jet Oil II is relatively cheap as you only need 1 quart.
One thing that has surprised me is everything is comparable or even cheaper then my V..the common bosch injector upgrade can be had for 300 bucks vs the common id850 injectors for the V which are $900..as well a good H/E for the e55 $400 vs $600 or so for the V.
The car is fairly high mileage and to be on the safe side I'll get the s/c oil swapped out soon. Tomorrow have an appt. for an oil change on my lunch break at hoover mercedes if you're familiar with then around the denver area, so I'll set something up for next week to change out the s/c oil, or maybe I can do that this weekend if I get some time.
I have the 77mm fsp. The one problem I have and that is at the 1-2 upshift, if the rpms land between 1.8-2k and the throttle is at 30% there is a surge. I have had the 77mm fsp for a few months now and about 6-8k miles which, if you couldnt tell, means I drive a ton (18k miles in the 8 months I've owned the car) and I have no issues driving every day. I also have a new tune waiting at home that may solve the issue. The FSP is fun and I'll most likely never go back to a clutched pulley.
The HE issue is definitely something that needs to be addressed along with the pump for anyone who owns one of these cars, stock or not IMO. Most guys buy an aftermarket HE, I chose to run a couple auxiliary HE's inline with the stock one. Either way, the stock HE is not enough by itself.
It sounds like you're no rookie so you probably dont need my advice but I hope it helps. Goodluck!
1 - My WOT was lean (~12.5-13.0 AFR) and BIP dissolved before I could have that resolved.
2 - My rear tires started to let go a lot faster than I have ever experienced. 1st and 2nd was wheelspin galore from idle to shift








