KCviper

Nice runs! Car sounds great going by!!

PetroC63

It was nice meeting you and Nick too.

11.95 is moving for that heavy car.

PetroC63

Thanks.

I hope so but the weather was pretty much perfect for racing yesterday.

There was a slight headwind but I think I'm reaching the limits of what
the car can do as it stands right now. Maybe a high 11.4 run but I think
that would be it.

Thank You.

Raleighc63

Mike.. It was good meeting you at the track.. You had some great runs and congats on the personal best.. I just couldn't get the tires warmed up enough as my best was an 11.7?...

mthis

Congrats on your PB's petro, once you get your 60's down then it will get fun, Let me know next time u go out to the track maybe I can squeeze out another day of racing.

PetroC63

Thanks Jim, the headwind wasn't helping and only one wheel
spinning during some of your burnouts hurt you too. Your car
was getting faster with more runs, it's too bad they closed
early.

Again, it was nice meeting you.

Thanks,

I may go this Sunday to Atco - it's the last day of the season.
They won't throw you out for going to fast, there was a vette
running 11.2's all day yesterday.

I'll let you know.

Mike

Dads C63

Congrats!! Great runs!!
Don't give up. You'll get there with a just few more mods!!

Time to update your signature!!

Didn't you change your name from PetroC55 to PedroC63?

SonnyakaPig

Once he cracked mid-11's he was reborn.

But, I don't think he goes by "Pedro". haha

PetroC63

Thanks Keith, it was a small increase in ET but I'll take it.

Yes, I changed it to PetroC63.

I didn't want people to think I owned a C55, so to avoid any
confusion I asked an administrator if it was okay to change
my screen name.

PetroC63

Definately not a Pedro. lol

SonnyakaPig

lol

C63fan

Mike! Congrats on the new PB.

Great runs! They are so consistent!

PetroC63

Thanks.

It's surprising how consistent this car is. Cool downs or
hot laps, it doesn't seem to matter.

A couple of my 11.6 runs were because I was experimenting
with different launch rpm.

PetroC63

Here is a video that was sent to me by Tony(malakasnyc) of the
two of us racing each other at Atco.

http://vimeo.com/17588774

His E63 is no joke, it ran a best of 11.95 that day.


Thanks for the video Tony.

pdjafari

I was considering the ECU tune, what type of 1/4ET would you be with just that tune? Did you have to remove your ECU and ship it to have it reprogrammed??

PetroC63

My best 1/4 mile run with just a tune was 11.947 with DR's
only once. Most of the time my car was a 12.0 & 12.1 car.

I added a RENNtech air box and the best I ran was 11.85
and a couple of 11.9 runs.

ECU has to be removed and sent to the tuner. Typically,
its a 48 hour turnaround time. If you send it on a Monday
you will get it back on a Weds.

sflgator

Hope you guys don't mind...

Instead of starting a new thread, I figured I would just add my time to Petro's thread (since I have the MBH headers as well ). Sorry for the hijack...

Petro - Congrats on your phenomenal run the other night! I just ran 12.080 sec. @ 118.84mph (on 93 octane) @ PBIR...not quite in the 11's but that's because I'm still running on my Michelin Pilot All-Season+ street tires and not DRs, haha...best 60ft. was 1.988 sec. on that particular run. I suppose with DRs, I could shave another 0.3-0.4 sec. off that time for a mid 11-sec run. btw- my highest trap was 119.42mph with ESP on "Sport" since I just spin way too much and fishtail with ESP "Off." Maybe with DRs, I could run with ESP "Off" and also get a higher trap speed. Anyway, I'm still happy with my best run...wanting to be in the 11's but I guess I really need DRs.

btw - I got several compliments on how awesome my car sounds when driving the 1/4mi. track...I told them although the C63 AMG's stock exhaust is absolutely incredible as is, it's the MBH headers that really open it up!

PetroC63

Congrats on your awesome run.

I see DR's in your future

Mid 11's are definately a possibility with DR's. My best 60' time is
1.75 and I ran an 11.504 @ 122+ so with the proper tires it should
put you in the same area.

Also, with DR's, ESP should definately be set to "Off"

I get the same compliments regarding the sound too.

loungn14

Cool video!

sflgator

Thanks! Yes, if I eventually get some DRs, I should be able to shave 0.2-0.3 sec. off the 60ft. which should result in an 0.4-0.6 sec. faster ET putting me right there @ 11.4x - 11.6x sec. @ 120+mph. Plus, I wonder if my trap speed was a bit low b/c I was running on 93 octane instead of the 103 octane race gas...I didn't think it made that much difference in our N/A cars, but maybe it does.

PetroC63

I tried 103 at ATCO and it did nothing for me.

However, if your car is tuned for 100 octane it will surely make a
difference.

sflgator

No, my car isn't tuned for any higher octane...just run with the 93 octane all the time.

PetroC63

93 octane for me too.

My trap speeds were down initially and then the car just came alive.

So many things can affect trap speed.

1. Wind
Most racetracks have an American Flag flying. Some have one right
next to the starting line. It is put it there so that racers could look
to see the wind direction and roughly how fast it was moving. A
headwind slows down cars, crosswinds can also slow you down, and
a tail wind can help you gain speed and lower ET.

2. Heat/Humidity
Heat is the number one power reducer, which is why we are always
trying to eliminate it (cold air intake, intercoolers, ice). A hot day will
slow the car down, its just how it works.

Humidity, you simply want less. The more humid it is, the less oxygen
there is, the lesser the "quality" air going into your car.

3. Weight
I've seen people take out spares/seats etc. What about gas? I see
so many people show up to the track with a full tank of gas, a big
no-no if your trying to run your best times.

4. Altitude
Some tracks will be able to tell you, or you can find an experienced racer
in the pits with an altimeter. This also effects engine performance
based on air density. Higher pressure will usually give you a better
running car. High pressure usually means sunny days too!

5. Tire pressure
How many of you have a pressure gauge in your glove box at the track?
How many use it? This is huge when dealing with traction/top speed.
Check tire pressures and play with them to find your ideal spot. You
want a balance between traction and top speed. Experiment!
Most tracks have free air somewhere on sight.

RRnelcheeze

nice run, sick sound.