MB RUSH

Ran in the LTA LSR Event in Maine on Thursday. Temps were 68-70 on this run. Air was dry. Not sure on the air pressure. Thought the car would run 181-182 based on changes made since I ran last year. 179.7 was the best run. It was 1.2 mph better than last year. IAT'S started at 59 F.
and ended at 115F. Was happy with that. Time to get ready for the next one!!

SICAMG

That's fantastic !!!!!

The Fly 1

What's your mods?

shardul

iTrader: (1)

MPH is spot on for the mods.

RaceHorse

Very nice speed. I'm sure it made for a few nice smiles (to yourself) on your ride home. What were some of the other cars in the Super car class? Thats faster than what the stock Hellcats can run, anything else impressive? Either way, nice job representing Mercedes.

SICAMG

That IAT is really good considering how long you where into it.
Do you notice the car "slow's" to excelerate after a certain mph?
Meaning that whole wind resistance thing LOL!!

MB RUSH

Thanks Rich
Thought there might have been a mile or two more. Happy with the trouble free performance. No Hellcats, couple of corvettes w/ bars and chutes. One alcohol funny car complete w/ wheelie bars major traction issues no full passes. Pristine restored 70 charger 440 6 pack 135 in the mile 143 in 1.5 miles. Not much in supercar that I remember.
Thanks Shardul !
They are in the signature at the bottom.
Thanks Gary Was hoping for a little more , but you know how that goes. Made 3 runs, drove the 800+ miles there and back. Car never missed a beat, and never opened the tool box. Hope you will do this one with us next spring.

MB RUSH

Both digital and analog speedos stop at 160. Goes past 160 and seems to slow at around 170.At this point I can see the 1 mile marker coming up, I am waiting for it to shift into 5th and watching the tach. It finally hits 5th at about 174-175 and I soon cross the finish. 2nd 3rd and 4th gear shifts are at 6600 rpm 4th-5th is at 6200. This is from Eurocharged tcu tune. Pulling so slowly at that point not sure if shifting higher would help. It did pull to 190.7 last year in 1.5 miles.

SICAMG

Thanks Gary Was hoping for a little more , but you know how that goes. Made 3 runs, drove the 800+ miles there and back. Car never missed a beat, and never opened the tool box. Hope you will do this one with us next spring.[/QUOTE/] ooops-- Botched up this quote lol!

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Starting to plan this out right now!! I think the trunk tank with no coolers inline is going to be the way to go. I am going to plan this out well so as not to be disappointed. Engine and trans comes out this winter for a couple things so looking forward to it.

RaceHorse

It would be neat to compare a dyno sheet to the rpm after the shift to see what kind of power you are making entering the next gear at those speeds.

I think with the mods you have added to get air out with headers, race cats, and resonator delete, along with bumping boost with the pulley combo and larger throttle body, you need to really consider upgrading from a stock intake setup to get air in. You will only get so much out of the other mods if you are sucking through tiny straws.

SICAMG, after a pass are you seeing all the ice melt in your trunk tank? If not what would be the benefit from eliminating the coolers. It sounds like MB Rush could benefit from a modified single pass intercooler that some guys have running for close to 10 years now. I think you already went that route. I was mixing the 2 cars into 1.

I realize I run a totally different platform, but over the years I follow what the W211 guys since it has been more of a perfomance platform than the W215. Good luck.

SICAMG

Well here is my theory. The ice in the tank when checked is at 30*.
The intercoolers will never be below ambient. So will say the ice is hitting the blower at 30* , the temp coming out is much higher,whatever that is but the coolers up front are at 80* .
I dont know what to think on that. I know back in the drag race days all that was run on the Mustang was one ice tank and that was it. No need for coolers.
And yes all the ice melts after one pass. But....my stage is a few minutes and it takes 5 min to get back to the pits so maby there is some left but who knows.

MB what where you looking for this year for speed compared to last year? What where your mods added to get you there.

MB also a little confused with time slip. MPH and dates dont make sense. Did you do the 1 and 1.5 mile run?

MB RUSH

Not sure there is anymore power in changing the stock intake w/ one member running 132 mph in the1/4 with it. I did some testing last fall on this. https://mbworld.org/forums/w211-amg/...rack-test.html



Not sure what the single pass will do. Some of the HX's are single pass also I assume the water goes through quicker. Will it make IAT's lower ? On a 1/4 mile run I always have ice left. If made back to back I have enough ice for a second pass. After 1 mile just cool water left.

MB RUSH

I have also thought of eliminating the hx with a couple of shut off valves and trying it both ways. My theory is the heat exchanger probably helps at lower temps. With out sensors to measure the temp in and out of the intercooler and hx hard to know.

Mods for this year was the 82 mm TB, Ran .3 and 3 mph faster in the 1/4 than last year. w/ 100 lbs out. While gaining 3 mph in the 1/4 only gained 1.2 mph in the mile. 10-15 degrees lower ambient may have made a slight difference this year. I was hoping 181-182. this year


You are right it says 2016 actual date is 7/13/17 also on the slip. This class is suppose to only run 1 mile. You are also timed at 1.5 miles. The record mph is really strange. Not sure why that is on there .It was on every one of my slips. The 189 record on the mile is Racehorses run from 2015. The190 record run for 1.5 is mine from 2016 .although Racehorse actually ran 200 mph in 1.5 miles in 2015. This is a small group of great people that put this event on, however everything is not always just right.

JoeJErnst

Nice job!

Do you know what your 1/2 mile trap speed is? I'm trying to figure out if mine will break 150 in the 1/2 mile next year but I don't have any reference for comparison.

SICAMG

I am just thinking the outside 80* temp in the cooler is going to melt 30* ice all by itself. So...you would have to know what the temp is coming out of the blower. If its below ambient,and I wouldn't think so, than the coolers can be bypassed. If the coolers, I have two, are doing there job to bring temps down, than keep them in the loop.
I run a Kleeman 168 lower and a 77 upper. Two custom intercoolers,two pumps,underhood tank and a single pass cooler under the blower. Temps will go up 35-40* on a 1/2 mile run.
You guys are lucky its very cool there with low temps and that helps a lot.

Mb who tuned your 82 throttle body and did you see an increase in boost from installing it.

hachiroku

how stable is your car? when i get past 165mph my cat feels like its going to take off.

RaceHorse

So since you are running the single pass intercooler, and getting better heat transfer, you may need the addtional heat exchanges to avoid melting the ice in the tank even faster. How big is your tank? If you are melting in the 1/4 maybe a bigger tank would be needed for the mile. The only benefit of bypassing the heat exchange would be if your pump had issues with flow. I'm sure you can see the return line filling in the trunk tank to confirm. So much of the fun factor is taken out of these cars when its over 80 degrees out.

I think its safe to say that car had quite a few go fast mods, and there were jokes about a custom intake being made with metal dryer hose. Despite what was said, I really don't think it was a stock air intake. Not everyone is 100% transparent with mods. Besides alot of weight was taken out of that car. I think a stock intake will be good up to 127-128mph, your not finding cars doing much more with stock intakes.

Yes on the single pass. I thought someone had before and after data posted. With the amount of air being consumed in the higher rpms I think at higher speeds there is a real need for a larger intake. I think your car could benefit from both in the mile.

MB RUSH

No I don't. My best guess is 145-150

Eurocharged has done all my tuning. Did not really see much of any increase in boost.


Track surface is really rough concrete. With a sidewind it moves around a little bit. Overall fairly stable and very controllable . Running through a mile seems very easy after you have it done it once or twice.

MB RUSH

Maybe a little more research is needed.

SICAMG

You where not allowed to run the 1.5 this year?

MB RUSH

Supercar class has always been limited to running only 1 mile, those are the rules. If you run thru the 1.5 miles at speed , they will usually come and have a talk with you and tell you not to do it again. I chose n to do it this year because at best the car would only have run 191 based on 1 mile speeds, not worth the effort.

SICAMG

Oh wow .I thought it was a given if you hit certain speeds with no problem they would look the other way and let you run.

RaceHorse

No, it's the opposite, they give you a spanking and no dessert. I can understand they have their rules but I can't see how our cars are any less safe than a rider on a street bike doing 200 miles per hour.

SICAMG

That's how I see it. And look at how many have died crashing there bikes. But I also understand as well.

RaceHorse

I think the speed rating and categories are dated and could/should be revamped. For all we know the super car class is becoming viable data for them to use as a basis of comparison. NHRA finally give a little bit of flexiblilty to 2008 and new cars, who knows if the LSR organizers will continue to do the same.

The restrictions made sense, when you think of cars 30-40 years old that ran 14" wheels with drum brakes. Cars with solid rear axles, and lousy tires must wander all over the runway with pinky thin sway bars. You have guys guess engineering their cars to hit speeds for the first time in thier particular chassis or body type. All based on trial and error. I'm sure my car feels under much more control at 120 than a 2nd gen. Camaro, at 120, that can do 200 mph.

Light weight cars that are gutted need chutes to stop(I think over 160ish). Our cars were designed to hit high speeds, and do with much stability in enough distance. For the most part, we are only adding power to get to those speeds quicker and we can stop.

Everyone is different, many turn their nose up and think since we didn't build our car from the ground up we know nothing. The other fallacy, is that our cars cost so much money, yet most of the slower cars probably had double the money invested. I can appreciate and respect all, but you can't please everyone.

I hope to make it up again, with dreams of bettering my 1 mile speed. I'll stay away from the 1.5 mile to avoid any drama.