Matt47FL

Tonight was the first time I had my C63 at the drag strip. I had a good time, beat a supercharged C6 corvette 3 out of 4 races, only because he could not launch the car. He was trapping 125-126 and I was 117-118. I thought my car would have been a little faster(hoping for an 11.6-11.7) but I guess for a full weight non pp c63 It ran ok given the conditions. My best pass was
1.846 60 ft
7.712 1/8 mi@ 93.81
11.89 1/4 mi@ 117.57

I had several other passes in the 11.90's all around 117.5 I have Nitto DR's, MHP LT headers and mids, and an OE 93 octane tune, ROW air boxes and afe dry filters. The DA was around 1250 all night, it was still 82* after 9:00 tonight according to my car.

I know I could remove some weight from the car(spare tire, less fuel etc etc) to improve the ET but how are some of you guys getting low 1.7 60ft times? I had my tires at 18-19 psi and was getting good traction trying to foot brake the car to around 1600-1800 rpms. Is there a better technique? Are there any secrets that I am missing out on? Any input would be appreciated, I want to go back when it gets a little colder to see how much that will improve the times

Also wondering how much OE race gas tune would help

mr747

Great time congrats

mr747

The best u will get is 11.7 race gas and slicks will get u low 11s I think

To get into the 10s u will need to be supercharged

Merc63

Right about what I was running with 200lbs removed and race gas tune. Running in 2500-3000 da though.


Are you spinning? Hard to get the 60 down on a heavy car.

Overspooled

would it really depend on the track? I mean i've been doing runs all summer and the best i've ran is 12.4.. running stock with second cat delete and res delete on stock tires! I put 91octane and I also use race start. Is there something I should do to improve? It seems like everyone here is doing under 12 seconds! Should I stop using race start and just gas and brake? should I put 94 octane?

MBAdon

I think everyone here gets a tune to allow the engine produce the amount of power it was designed to produce before it was electronically dumbed down for the C-Class.

Dads C63

Congrats!! Those are actually good times for the conditions and your mods. Be happy! In colder weather it will improve.

Be Safe!

Matt47FL

Well at least my times are in line with others people that have similar mods. What are the easiest/best light weight mods? I really dont want to change the hood or truck. Im sure brake rotors and wheels would help out a good bit b/c of the rotating mass. Do you guys remove anything from the car beside the spare and jack?

mr747

Back seat is good for 25kgs

Merc63

Please dont compare times from different tracks and different days, they absolutely will not be the same.


Engines are AIR PUMPS. IF you are running at a different track in different conditions, you will have different results.

Run your car at your local track against others and that's as good as its going to get.

Some of these tracks have different equipment for recording the times as well. That also comes into play... Look at these guys at ATCO in -600 DA... that air is unheard of around here... We have a track thats 10 hours away at sea level and NA cars will be around half a second faster than locally.

I get to the track at 6pm, its hot out, but 11pm it cools down the car or bike will be running quicker... Its all in the air.

Dads C63

You are correct that two piece rotors will help and thats a mod that helps all the time. Depending on how serious you are is how much trouble you want to go through the lose weight. Hood is 40# and again stays gone and helps daily. Trunk helps but you must be serious for only 10-15# loss. Lighter wheels and tires for drag racing will help also if you want a second set of wheels/tires.

Passenger seat is 65# and only takes 10 minutes to remove. Just as easy to put back. There are different exhaust systems that will also help lose weight that stays gone but expensive.