I'll take pics of all time slips and post them.Still would like to know what the margin was at the finish. That's not revealed in the chart above.
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I'll take pics of all time slips and post them.Still would like to know what the margin was at the finish. That's not revealed in the chart above.
Poor ole Spacey Casey! He just can't shake those M119s! Not even the slowest one! Steve and Justin will have to weigh in on their races with him but I do believe that he didn't beat any M119s this time. In fact, I don't think he has EVER beat an M119, except for mine, and the tally for us is: B3: three wins, S70: two wins, which still leaves B3 the overall winner!
Regarding the race report, I think it is better if each one of us reports on our own races because I don't know enough about some of the races like the epic races between the S70 and the two 500Es, nor do I know enough about the epic race between the two 500Es. (Although I do know that Stevo redlighted on that one too. Still would like to know what the margin was at the finish. That's not revealed in the chart above.)
Nope. 1/4 tank = 4-5 gallons = roughly 30 lbs of weight at the most, but remember you need 2-3 gallons in the tank to, well, run the engine.Would a little over a quarter of a tank of fuel cost us that much E/T?

Thanks and although I did manage an .032 RT later on, I bombed on the rest of the RT's.btw! 0.025 is killer.
Yep, as far as grudge matching goes.Well, further study of the video has revealed that Steve redlighted his first race against Spacey Casey too so I guess Spacey Casey did win at least one after all this time.
Nope. 1/4 tank = 4-5 gallons = roughly 30 lbs of weight at the most, but remember you need 2-3 gallons in the tank to, well, run the engine.I'd guess 30 lbs is worth a few hundredths or so. You'd need a change of ~100lbs for a change of 0.15 seconds.
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Thanks and although I did manage an .032 RT later on, I bombed on the rest of the RT's.

As a VERY VERY rough guide, yes. That's 100 lbs static weight, btw, not rotational (wheels/tires/brake rotors). Find out for yourself: Keep 100 lbs of ballast in the trunk for a couple runs, then remove it. See how much the ET changes. It will vary from car to car, yours will likely be a bit more or less than a tenth, but I'd bet it's within 5 hundredths (same day, no other changes).So you subscribe to the 100 pounds equals a tenth rule?
I'd expect the 4.2L to get better economy even with 2.65/2.82 gears. As to which would be quicker (in the same chassis), that's a tough call. The 5.0 would always have the higher trap speed, but the ET's could be pretty close (assuming zero wheelspin).Something else I'm wondering: Which combo would get better fuel economy? A 5.0 M119 with 2.24 gears or a 4.2 M119 with 2.82 gears? Which combo would be quicker?
Yes and no. Yes we do hold you to a higher standard, as you have far more experience than the Vookster. But no, I just missed your .007 light - sorry! Anything under 0.100 is very very good, under 0.050 is downright excellent, and 0.00x is plain awesome. In competition I'm happy with a green <0.100 and prefer to stay in the 0.030-0.060 range (which is extremely difficult to achieve on a consistent basis).You get a hearty congrats for a .025 R/T while I don't get squat for my best of all of us for the day .007! I guess I am held to a higher standard!

Dooood, you just needed to post your time slip and then the .007 ET would have been seen. Just take a picture of the time slip next time.You get a hearty congrats for a .025 R/T while I don't get squat for my best of all of us for the day .007! I guess I am held to a higher standard!
The Mad Scientist needs to track his car when it’s washed, it just might cut through air better...this hypothesis should be tested.Eric's dirty car
makes it to the end quickly
blending with the earth
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I don't know how much of our gain is from the shorter than stock tires (24.07" diameter vs. the stock 25" diameter), how much is from the much quicker shifting as a result of the several turns of the "T bar", and how much of the gain is from the lighter wheels. I have again violated the "one change at a time rule" but again, it was because I was trying to spank Stevo last time so I wanted to try everything I had left that I hadn't already tried.
Interesting that the W211 E55 ran approx 12.3 @ 111... it launched harder than Justin's 500, but Justin was only 2mph down (~109) at the top end. The E55's low-end torque really helps the launch and low ET. Once Justin gets Hoosiers and LSD, and the 150 shot rejet, that E55 will be in serious trouble!
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Hard to say. The shorter tires may reduce your ET slightly but will not affect trap speed. The lighter wheels will increase trap speed and should reduce ET slightly as well. The trans tweak would likely have minimal effect (near zero, IMO) unless the shifts previously were *very* slow and soft, and are now quick & firm. Add up everything and maybe 1 tenth, 1 mph? Maybe a bit more?Dave, please share your thoughts regarding the above post. In your humble opinion, what mods got me what gains?
I researched this a while ago. There is significant risk of breaking rings if you turn on the NOS too early, due to extreme cylinder pressures. Justin already pushed it down to ~2800rpm, I think, from Steve's recommended ~3000 minimum. (?) I wouldn't go much lower - not worth the risk. NOS engages at roughly 40' out (give or take 5 feet). He's on 125 shot now, a 150 shot should bump him to mid 12's at low 11x mph. But he's got wheelspin with those Nitto drag radials. I've talked with him about getting Hoosiers (and LSD of course) but apparently he's not made of money, lol! One thing at a time...I say there is a lot of room to bring that N20 on earlier! Now add a LSD, and Justin will be in the hunt with that E55! We all know that the first 60' of the race are the most important! Yes, the 150 shot should help some but isn't Justin already on the 125 shot? Justin was on slicks too BTW. (Or at least good drag radials.)


He's on 125 shot now, a 150 shot should bump him to mid 12's at low 11x mph. But he's got wheelspin with those Nitto drag radials. I've talked with him about getting Hoosiers (and LSD of course) but apparently he's not made of money, lol! One thing at a time...
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Nothing has been done and this time I had a smudge over a ¼ tank of gas compared to the previous track day, where I had exactly a ¼ tank of gas. Maybe the car and the driver are just getting used to the track and ¼ mile racing in general.Something else I've been thinking about. Every one of us was unable to get anywhere near our previous best E/Ts that we have obtained in the past. All of us EXCEPT for Jett and Steve. Why? Well, Jett has done some more mods AND he has improved his launching technique. And then there is Steve, who ran within a hair of his previous best, again, despite the fact that none of the rest of us could get anywhere near our previous bests. Why? I think it's because ole Stevo has made another improvement or two! Come-on Stevo, give it up! What did you do? Did you have a whole lot less fuel in the tank this time? Another tune on your ECU? What is it?
Justin has that first race between Stevo and me on his camera. Everybody say it with me now: Come-on Justin, please post that video! (I know Steve would like to see it and a few other people would like to see it too!).
Also, speaking of Justin, would you guys please tell him that running wheel spacers isn't safe! He doesn't believe me!
Regards, Eric
Thought I already told y'all... but we found that the amount of powerbraking (i.e., launch RPM) can have a significant effect on reaction times. Might be as much as 2 tenths (0.200) between no powerbrake (launching at idle) and moderate powerbrake (launching at ~1500rpm). However there is ZERO effect on the ET and trap speed. It only changes reaction time.I've noticed I redlight A LOT more when I powerbrake too. I'm not necessarily quicker in the 1/4 when I powerbrake but I do redlight a lot more. I see a pattern here.
If they are not hubcentric they are dangerous and should not be used on a Mercedes. If the wheel isn't centered properly you'd get nasty vibration, especially at high speeds (i.e., freeway speeds). I'd be surprised if they were not hubcentric. Maybe they're thin enough to still allow the wheel to center on the factory hub? What spacers are they, and why are they being used (i.e., for what wheels, etc).I need to put this spacer thing in the proper context. Justin is telling me to run the spacers at the Mojave Mile. He's telling me if there is nothing in the rules prohibiting spacers, then it's OK to run them. I say no! And on top of that they are NOT name brand, and they are NOT hubcentric.

Thought I already told y'all... but we found that the amount of powerbraking (i.e., launch RPM) can have a significant effect on reaction times. Might be as much as 2 tenths (0.200) between no powerbrake (launching at idle) and moderate powerbrake (launching at ~1500rpm). However there is ZERO effect on the ET and trap speed. It only changes reaction time.
If they are not hubcentric they are dangerous and should not be used on a Mercedes. If the wheel isn't centered properly you'd get nasty vibration, especially at high speeds (i.e., freeway speeds). I'd be surprised if they were not hubcentric. Maybe they're thin enough to still allow the wheel to center on the factory hub? What spacers are they, and why are they being used (i.e., for what wheels, etc).
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This depends on your definition of "adequately". I tried this once with some BBS wheels that lacked the proper MB centering rings. I used a dial gauge on the bare wheel and tried your "careful slow tighten" method, several times The wheel DID NOT center perfectly. It was out by 0.5-1.0mm (can't remember exactly, but it was not acceptable). Only after installing the centering rings did the wheel center correctly. It's not possible to center the wheel properly otherwise.They're no name universal crap with over-sized slotted lug holes obviously made to fit multiple applications. They're not very thick but they are thick enough to prevent the wheel from centering on the factory hub. The only reason why they worked at all was because of my careful and methodical and staggerd slow by hand lug tightening technique which allowed the wheel to be centered adequately. They were being used to make a set of W140 wheels work on a W124.
Just because a wheel (or any MB part) has "140" as the prefix of the part number does not always mean the wheel/part is for a 140 chassis, or was even used on a 140 chassis. Most of the time yes, but this is not an absolute rule. They are likely W140 wheels but we'd need the full part number and size specs (width & offset) to figure out for sure. The bigger problem is the W140 wheels have M14 lug bolt holes and seats. Using M12 bolts/seats is not safe. You need aftermarket hybrid bolts with M12 thread and M14 ball seat for this setup. Probably not a huge deal at sub-freeway speeds, but at >100mph, I wouldn't do this.It's really crazy because I have 2 other W140 wheels where the offset is too much in the other direction and they stick out too far instead of being in too far. All 6 of these wheels have "140" as the prefix of their casting number. Crazy! I just wanted some factory looking 8 hole 16 inch wheels!
Dude, you crack me up. Wheels won't make you cop bait unless perhaps they are chromed dub-deuce spinners, or something else ridiculous. You really think cops can tell one 16"/17" wheel from another and if they are OE or not? Or that an .034 chassis should only have 8-holers because that's what came from the factory? ROTFL!! The majority of MB aficionados wouldn't even know that!!(Aftermarket wheels make you cop bait.) Why is everything so hard!
500E wheels are 8.0 ET34 and stick out pretty far on a normal 124 chassis. If you roll the fender lips and use the fender spacers, etc they'll work... but may rub up front when cornering hard, and may rub in the rear with a full load. They will work but they're not an ideal fitment. They're not particularly light, but not bad for their size. I thought you were using forged CLK's? Why do you even care about 8-holers? Dump those "W140" wheels and get the right stuff already!(I'm pretty sure that 036 wheels would stick out too far too. After all, MB had to flare the 036 wheel wells to run them!)

This depends on your definition of "adequately". I tried this once with some BBS wheels that lacked the proper MB centering rings. I used a dial gauge on the bare wheel and tried your "careful slow tighten" method, several times The wheel DID NOT center perfectly. It was out by 0.5-1.0mm (can't remember exactly, but it was not acceptable). Only after installing the centering rings did the wheel center correctly. It's not possible to center the wheel properly otherwise.
Just because a wheel (or any MB part) has "140" as the prefix of the part number does not always mean the wheel/part is for a 140 chassis, or was even used on a 140 chassis. Most of the time yes, but this is not an absolute rule. They are likely W140 wheels but we'd need the full part number and size specs (width & offset) to figure out for sure. The bigger problem is the W140 wheels have M14 lug bolt holes and seats. Using M12 bolts/seats is not safe. You need aftermarket hybrid bolts with M12 thread and M14 ball seat for this setup. Probably not a huge deal at sub-freeway speeds, but at >100mph, I wouldn't do this.
Dude, you crack me up. Wheels won't make you cop bait unless perhaps they are chromed dub-deuce spinners, or something else ridiculous. You really think cops can tell one 16"/17" wheel from another and if they are OE or not? Or that an .034 chassis should only have 8-holers because that's what came from the factory? ROTFL!! The majority of MB aficionados wouldn't even know that!!
I thought you were using forged CLK's? Why do you even care about 8-holers? Dump those "W140" wheels and get the right stuff already!
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The first are 16x7.5, the EPC says they were only used in Europe/Japan but that may not be correct. The second are 16x8.0 and are used on the rear of some W140 models from 95-up. The EPC doesn't post the offset, you'll need to find the "ETxx" number stamped on the back of the wheel...#140 400 09 02 are the ones that stick in too far. I got them off of a W124. I was using the very same lug nuts that were being used to secure them to the W124. #140 400 13 02 are the ones that stick out too far. I only have two of those. They were on a W126.
The CLK's used M12 bolts, only issue there is bolt length. It's the S-class wheels which are M14, those cause problems, and in general should be avoided (i.e., not used on cars with M12 hubs, especially without the custom hybrid bolts).And speaking of these lug bolt issues, are there any similar issues with these CLKs that we need to be concerned with? (I already know that there is an issue with the bolt length.)
Some Brabus wheels require centering rings, others do not. The set I have was quite heavy too. I got them for possible snow tire use, then decided not to drive that car in the winter, so they're collecting dust at the moment. Oh well.the Brabuses have another problem: for some strange reason, they have an over-sized hub hole so they technically aren't hub centric either! (Do these need centering rings too? Why would wheels made for a MB need centering rings to work on a MB? Brabuses aren't made for anything else, are they?) And they are super heavy bitches too!

Interesting! Got photos, or a link....?I've got a set of genuine brands spacers. They are hubcentric and actually double as a centering ring for Mercedes. They even screw into the wheel, though I don't know if that will help dispell some of your superstition.
Thank you, sir.Yeah Steve, I'll get it up for you within the hour man.![]()
