12.0 then 11.7 now 11.4. Went out to Fontana drag way on Saturday and the weather was about as good as it gets for that track, low to mid 60* temperatures and it was overcast skies for most of the day. I ran a best 11.45 @116mph... 119mph was my best trap sand the car hooked 3 out of the 5 runs. I made a best 1.63 60' on 16" clk with et street radials. My question is how do I get more mph? I have all supporting mods and can not break 120mph I have read and heard that the track (Fontana) is slightly uphill and many people run better time at other tracks. I'm planning on going out to Bakersfield sometime this year to see what she runs there... Anyone been to both tracks with comparable numbers?

Seems that you are pulling timing at top end. What is your cooling?

Split cooling --- Ftp v2 heat exchanger with underhood ice box packed with ice in between runs. I bought datalogging stuff from grip grip last week so hopefully I'll get it installed this week and see whats missing from this thing

Data logging your friend

First of congrats! MPH does seem low, Mainly due to your really strong 60 foot times and quite possibly ecu pulling timing. More traction off the line will get quicker ET and slightly lower mph. Same applies other way around worse traction higher mph.


Fontana is not sea level, It's about 1200 above sea level. Your car will go faster at Famoso raceway. Ive ran both, depending on the day it can be 1-2 tenths and 1-2 mph difference.

Famoso raceway in bakersfield is a fast track, arguably the best track we have in the west coast. Still does not compare to east coast tracks for ET and MPH. But, still pretty good for track prep and sea level.

For that HP level you should be trapping much higher and could/should be deep into the 10s. 11.4 is soft for 540+ WHP. Like hulk says you need to data log to see whats going on. Your car could be pulling timing in the top end.

To bust 10's, you need to get your trap up to 125mph.

^^^ this and your 1/8 is very important

Horsepower numbers mean nothing. What mods do you have?

?

I can ask the dyno guy to make my horsepower number whatever I want, (exaggerating of course but you know what I mean).

Good luck to the OP on your quest for 10's!

mods ?

Current mods 180mm cp, -10 mod, split cooling w/ ftp v2 black exchanger and under hood tank, 82mm throttle body, 550 injectors with looped rail, kleemann headers with no cats and resonator deletes. Belt wrap kit, Ecu & Tcu tunes by Jeremy @ OE tuning. Ms109 tune for the track. 16" clk wheels w/ et street radials ... I have a 3k stall converter not yet installed in the car as I wanted to get my traction under control first

best 60' - 1.63
Best 1/8 mile 7.3 @ 94.5mph
Best mph 119.x
Best et 11.46

It just sounded funny when I read it.

Agree, you can manipulate dyno numbers.

Are you adding ice to your tank before the run? You are pulling timing in your 1/8 it seems like also. Mph is down

https://mbworld.org/forums/w211-amg/...ml#post6429163

Here's a track pull at 50-55F ambient, no ice in the trunk tank. Granted I don't have my 82mm TB installed yet but I do have a slightly larger pulley and similar mods. I was also on all-season tires that day, as I wasn't intending on making a pass and was just there hang out.

You can easily see the timing being pulled in 3rd gear

Exactly, I would hazard a guess and say its heat related, perhaps some šhitty 93 octane that isn't quite 93 octane too, perhaps.

Yes, when you see the iats reach over 117* it's down, and you see the afr getting rich.

This/\/\.. Add a meth kit and 10"s "All Day" Your loosing alot up top.. I have similar mod as you and heat kills the power up top.. Good luck..