I had some recent work done at a local shop at Funktion Auto in Dulles, VA - they replaced a faulty evosport cooling pump (IATs went to 160F all the time, MBenz dealer said it was broken...now its normal), they also installed Kleeman High-Flow cats and created custom air ducts (replaced the stock black plastic piece flap only).

Note that this was a DYNO DYNAMICS dyno. Also note the other dyno reads in my signature.

The car has the following performance mods:

Hennessey pulley (I think 176mm),
Evosport headers,
Elecronic cutout exhaust
Evosport Cooling kit,
Kleeman ECU, LSD & Hi Flow cats,
-10C fan and 160F tStat,
VPR 80mm TB
VRP Cams,
Sprint Booster,
FunKtion custom air ducts & x-pipe
Mickey Thompsons.
New supercharger belt
K&N drop ins

I got the Kleeman ECU mod when the car had just the pulley and cooling kit and headers + cut outs in 2004. Based on the dyno I think a couple of things are happening...

1) The A/F ratio seems okay (safe range) but its not smooth -- I would bet the timing could be advanced. The shop owner at Function Tuned seemed to think there is at a minimum 20rwhp on the table. I hope a hell of a lot more given that a car like this should be pushing 540 rwhp on a Dynojet and probably 485 rwhp on a Dyno Dynamics. They had a simlar car in without the cams and TB and it put down 433rwhp.


2) The boost seems low - is this normal? 13psi or so? What about the boost pattern? I thought i would see 14.7 or so with this pulley. What is stock boost?

To my knowledge Mercedes Benz has never done the dreaded secondary Air pump recall. I told them never to do it and the engine light goes on all the time with that being the error code that I keep turning off with a scanner.

I know my car has a hybrid of vendor parts but its because I began modding the car almost 6 years ago and at that time it was just Kleeman and EvoSport. It do not believe it should not make a big deal.

So what are my options for getting the "correct" tune? VRP, Kleeman K4, LET, MHP? What are your suggestions.

Thank you everyone...

headed to MIR tomorrow...hope to break into the high 11s.

 

Anyone? I'm also curious!

 

E55 Baller, 446.1RHP is way too low . you should get 540 to 550rhp and your IAT is way too high .Ask your dealer if they replace your 2nd air pump and send your ECU to Kleemann and tell Cory what happened . At 6500 high altitude my K3 made 491rhp and 562FPT and IAT never reached over 120 on 95to 100F .My dealer replaced 2nd air pump for my E and cory bring power back for me with no charge. Hope this help.

 

I'm going to jump in here with a super noob question and ask, what is this second air pump about? Are there recalls on it? Is it similar to the intercooler pump which people tend to dislike also? Should I have the dealer check mine out? I'd like to know more if anybody would care to fill me in.....sorry to hijack I hope you get this taken care of I would be really dissapointed too.

 

Function Tuned's dyno reads very low but you arent making the power you should be. I think you should get a custom dyno tune.

 

I agree. I think this dyno translations to 490rwhp and 600 rwtq on a dynojet but where is my other 50 rwhp?????

Amhad how would I be able to get a custom tune? Would a tuner have to fly out to the Function Tuned dyno specially?

 

contact wayne or jerry at LET and they'll squeeze the whp out of it. even though it is DD dyno, for the insane maount of mods you have that is kinda low

 

could be the cut outs depending on where they are. where they open or closed for the dyno run?

 

He just trapped 126 ROFL!

I call BS on this thread haha

 

it was alll a game!!!
or the dyno lied to him badly or this track is a magic number maker
congrats baller!

 

LOL!! Further proving that the track is the ultimate dyno eh?

Amazing runs Baller!!! (talking about his flying 11.1 run today)

 

Dyno-Dynamics is a very very good chassis dyno. Unfortunately it don't show you big numbers like dynojet & dynapac. Big #'s always makes people happy, but real world is different. As of 20 years of experience running high dollar environmentally controlled engine & chassis dynos, ET slip is still the best thing out there!

 

The numbers may be low, but the A/Fs don't show the drop under 10 that you would see at 14+psi from the dreaded recall. The recall isn't dreaded. Having an ECU file that old is. Get the updates and have Kleeman flsh it. Last thing, tell those people to do a proper pull and not just try to catch the peak. If you really want to check out your tune, then you need to collect the data prior to 2500rpm and past 6000rpm. How can you see how it acts at the top, if you don't even include it in the pull?

 

I was really expecting to trap around 120 today. My last run was 12.20@119.6 without the VRP TB and Cams, xpipe, Kleeman high flow cats and custom air intake ducts.

The dyno was real, not a joke. I am laughing now with the 126.6 trap. I guess I can't put any stock in dyno's for actual HP but now only for tuning.

Hopefully I can find another 20rwhp in a tune to update my K2 2004 flash.

 

Best way to see these parameters is to steady state every 250rpm and tune your fuel & timing (Street cars only please!). I understand it's hard with mail tune, but A/F is just a number. You can make power with fairly rich tune and more timing, or leaner fuel and less timing. Just my 2 cents...

 

Very good points. Agreed it is hard on a package tune, especially since the OP's gear isn't exactly like a VRP or Kleeman, but it can come very close without the need to reinvent the wheel. I'm more into adding what power that is there, especially by means of TQ management or the such. Trtying to push the envelope on a street car just doesn't make savvy given all the street variables.

 

Same boat with you. Sometimes we have done just some serious tweaking on street cars too. It's kind of fun to work with them, because you can see some good gains or downs (like 10-20hp) just making a change. Our race engines gain 2hp, and you done something...

 

dyno shmyno

 

I've never said the absolute numbers mean anything but it is a safe way to load the car for tuning...

 

i wasnt responding to you, this is what I told Isaac when he showed me his dyno sheets right before his run.

 

just more indication that dyno numbers mean very little in the realm of real world performance.

 

Dyno #'s means a lot, but jumping from one dyno to another is useless.
In the other hand, it's hard to simulate real driving or drag conditions on the dyno. You can get it close on dyno, but tweak it @ racetrack.

 

i disagree. dyno's mean very little when trying to compare numbers in the manner that most peoeple do. if they meant as much as people would like them to, all the dyno queens would be winning at the race track and all to often that's just not the case.

 

But didn't his track numbers kind of reflect? Honestly, I don't think either "number" means much in and of itself. Life is all relative. If there were only one car, what would 500hp mean?

 

what do you think...