I thought I'd share my run in I had the other day with a c63 AMG with you guys as it was a pretty fun one...
So I'm sitting at a light at the front heading into a local land bridge that goes across the bay when a black c63 pulls up next to me and revs his car and lunges it forward a foot or two. I turned off the AC and rolled forward to line up with him. I tapped the left paddle to drop into first and almost immediately the light goes green. We both roll off the line and punch it (no launches) and I immediately jump out by a fender length and keep on pulling. I didn't let off until about 145 and by that point he was far enough behind that I was watching him in the rear view mirror. I'd estimate about 3 cars back.

Onto run #2.
We cruise near each other for a couple miles and then line up again and slow down right into the sweet spot where I'm at about 3500 rpms in 2nd rolling. We roll down Windows and I do the three count. As soon as we punch it again I jump about a fender length ahead and as i heard the c63 shift up he dropped back and the 55 kept pulling. This time we ran to around 120 and again I was looking at him in my rear view.

After we slowed back down he pulled up with his windows down and we talked for a second. The guy and his passenger asked if I had a chip and said they were originally expecting to win. I told them I had a pulley and a tune and we parted ways. Overall a good run and good guys and for the record I have a 77mm fixed pulley, auxiliary heat exchangers, and a tune by Tony Lawshee.

Nice!

How are you finding the fuel mileage delta with the FSP?

I have same set up. fixed pulley hands down best mod. I added 82mm tb and injectors but cant get tune right. I'm going to put stock injectors back on and have tony tune see if that changes anything.

FSP is indeed a world of difference over the clutched. What issues are you having with your tune? Jerry can make it work, that I know for a fact. It will cost you for all custom tuning but he is the only tuner I know that can make it happen. I have FSP, long tubes, 82 tb, 550 cc injectors, 168 Cp. Runs flawless, no lean spots, erratic start ups, no resistor, no hiccups. I know they don't promote tunings for FSP but an open budget to tuning will get it done. At least in my experience now with 2 FSPs on 2 cars I've got.

I'm having air/fuel issue, it's all over the place. either to lean or to rich. idle is good, it surges between 1800-2200. My mods are Kleeman headers, 82mm tb, 550 injectors, split cooling, colder plugs, tcu tune, ecu tune but not perfect.

I had those same issues with different tunes on both cars I'm running the FSP on at one point or another in the tuning process. We have pretty much the same mods then, I'm running kleemann cams as well. The tuning from my understanding is very sensitive to getting the bypass valve / map sensor / air fuel all tuned to there tolerances of each other.

so did Jerry get it dialed in for you? I would hate to give up on the fixed pulley. people with these mods are saying to go cluched to have no issues.

OP good runs!

Don't know why they thought they would win

I had a friend with an E63 that thought he could beat me stock to stock He didn't

Redbull thanks it was a good time. Definitely reaffirmed the decision to go with the 55 over a 63

wait so I am actually reading this correctly.

We are talking about a naturally aspirated engine loosing to a forced inducted engine. Correct?

Yes

Sweet run.