boostiality

Gents,

I'm stuck at 12.3 lol
60ft: 1.9/2.0/1.9
1/8 et: 8.0/8.0/8.0
1/8 trap: 89.2/90.1/90.2

Still at the track made 3 runs so far, all 12.3x@114mph.
Car is running consistent at least?

2006 CLS55: OE canned tune, plm shorties, 180mm crank, benzworks heat exchanger and Johnson pump on 91 pump gas on regular street tires.

chiromikey

Not sure how much heavier the CLS is but both the mph and et seem a bit off for your mods...more in line with a stock E class.

E55Greasemonkey

Times and MPH are way low. You could pick up .3 with drag radials, but your MPH is off. Are you logging your IAT's? I'm beginning to think those Johnson pumps aren't so great. I would bet your IAT's are going too high, especially given the big crank pulley and restrictive exhaust (Shorties don't do much).

What is the outside temp and humidity ?

Yacht Master

+1 looks like stock numbers for E55

FinanceMike

I was trapping 89-90mph in the 1/8th mile with just an ECU flash on my CLS55. Something isn't right. Check your pump and make sure it's working ok.
After I added an upper pulley and Kleemanns, I was still trapping 113-114mph. Turned out that the wire came loose on my pump. Once I had it fixed, my traps went up to 118-119mph. I still haven't cracked 11's or 120mph on my CLS though. I guess I'll have to bolt on DRs if I want to see either of those goals.

Good luck

boostiality

Thank you all for the replies, this car has always "felt" slower then my e55 I was just never able to quantify just how much slower.

I couldn't get my wireless elm327 to talk with my iPhone a the track so I'll sort that out tonight and do a few street pulls.

Temp was low 60s and dry humidity (Bakersfield ca)

E55Greasemonkey

Try and get your elm working and post back. I use the TORQUE app with a $25 elm.

boostiality

Okay I logged 2 pulls tonight to 90mph. I sent the logs via email but can't seem to read the lgf files (Dashcommand for iphone which was sent to DashCommand to windows).

But from the replay directly from the app I see that when I hit 6500rpm on 1st and 2nd, IATs are a solid 90*F. It is 47*F currently so that's a difference of 43*. If the delta is 43* over ambient, that would mean earlier I had to be hitting 105-110*F IAT. I'll try again tomorrow afternoon to replicate the today's temperature.

chiromikey

I don't think those iat's are high enough to explain the poor performance...

sircl55amg

put some DR...make sure you do a minimum 45 min cool down before each pass,( ice on supercharger ) --- take out your secondary cats


good luck !!!!

E55Greasemonkey

Those IAT's if accurate are good. Possibly your tune is off. I forgot to ask.if you are running stock wheels/tires too. How many miles on the car and has the fuel filter ever been replaced?

Joncl

You need to log with real equipment not elm, get yourself a zeitronix system that will log afrs, iats, boost etc then you can know if you have a tuning issue or something else because so far your iats say you are not heat soaking so something else is going on, maybe you are running rich because the tune is off and you need more timing , it's a guessing game without real logging or just jump on the dyno and see what's going on

320 dreamer

the 2 biggest issues you have are the fuel your running and the 60 ft times. drop the 60 ft to 1.7 and pick up .4 at the traps giving you a 11.9 higher launch speed and better tires will make that happen. with 91 oct you are down on power from the start. add a race tune on 103 and you will see a huge difference.

chiromikey

I've run mid 11's in the 120's on 91 octane so I disagree with the fuel or 60ft being the problem. His mph is way off indicating something else.

Forrest Gump 9

+1

All my runs are with 93 octane pump gas too. As far as the AIT logs, a sprint to 90mph only show partial. A run from 1-120+ will show the true run. I bet you if you do that you'll see AIT above 130 degree.

boostiality

Thanks again for the replies gents.

320 dreamer: I'm definitely going to go more prepared the 2nd time around. I'll bring race gas, race gas tune and DRs, however my goal was to get this car into mid 11s with 120+ traps on 91 and street tires.

Chiro & Forrest: I believe you guys are correct, theres something definitely wrong happening. The car isn't breaking up any where and it's running very consistent, just consistently slow. I'm going to add a Cobra reservoir and split the cooling then do a dyno tune with OE.

320 dreamer

of the top 80 runs listed on drag times for the e55 only 2 of them had a 1.9 60 ft. 60 ft times make or break the run. for every .1 you cut off the 60 ft you realize .2 at the traps. with a 1.9 or 2.0 60 ft he was running it is killing him down the track.

60 ft times are everything when it comes to the 1/4 mile

E55Greasemonkey

This is simply not true, at least at our power levels. Maybe a 14 second car.. but for our cars .1 less in the 60 ft = .1 less in E.T. I have (had) a stack of timeslips from my car to prove it.

Regardless, his MPH is low, and that will vary little with his 60 foot times. Matter of fact, last time out my fastest MPH was my lower 60 ft....

I see O.E. advertising their "safe" tune...if that means more (too much) fuel and less timing that would be my guess as to where the problem may be.

While I'm a new-ish E55 owner, I was drag racing as far back as 1998.

chiromikey

If et was the only goal here I would agree. However, in these cars a slower 60ft times typically equates to + 2-3mph at the top end so his car should be even faster (not quicker). His mods should be yielding 120+mph traps. Imho, either his tune doesn't match his mods or there's something going on with iat's and timing.

bstudey01

Without properly monitoring AFR's I really dont think anybody's canned tune can be 100% right. I say buy a wide band and some logging software and see where the tune is. Probably too rich as all canned tune tuners would rather be safe than sorry!!

Hammer Down

I'd like to chime in on the 60' issue if I may.... When I was stock I ran 12.07 on street tires with a 1.81 60' and all I did was add drag radials and ran 11.701 with a 1.71 60' so in my case a .10 off of my 60' equated to .30+ off of my et

E55Greasemonkey

Assuming these were on differnet days, in different weather..It's not a good comparison. What were the MPH of each of those runs? Also your drag radials may have helped your E.T. past the 60 foot timer vs. your street tires... Were your drag radials the same size, on the same rims as the streets? Lots of variables here!!

My time slips as I mentioned were all on the same day, same weather, same 45 minute cool down.

Hammer Down

We're talking over 4years ago so I don't remember all of those details but I do know that I've never run in anything over 70degrees. Street tires are 275/30/19 and the drag radials were 275/40/17 someone did the calculations at one time and they were pretty close in size.