ttboost

Hi all. Just picked up an 05 SL65 a few weeks ago. I bought it under the impression it was lightly modded, but as near as I can tell, it only has a heat exchanger and no mufflers...but a stock tune.

Drove to the track last Wednesday night on street tires and managed a 11.81 at 118ish on the first pass. Just pulled up around the water box and just took off nice and easy. Next pass tried to power brake a smidge and promptly spun about 100ft or so. 3rd pass, tried to duplicate 1st pass, but the track went away...(obviously car #604) Tech guy thought it was appropriate...

Then I went to my tuner's shop (Porsche /Audi tuner, not MB),and strapped it on his Mustang dyno just to baseline. 494whp/648wtq. This in at 18psi. We thought a stock SL65 was supposed to make 22 psi or so?

So obviously I am currently shopping for a ECU/TCU tune.

V12TTenthusiast

I think 18 sounds about right, but I can't remember where I heard it from. To be honest I'm trying to do a turbo upgrade on my SL65 but I need to find a shop who can do it since the only turner I'm aware of that did a turbo mod on the 600s and 65s is speedriven.

You mentioned you have a HE, but if you havent already get an upgraded IC pump too

Also if your planning to come down to the eurocharged opening in the DC area you should look into there ECU/TCU tune, I've been told by alot of people there tune is amazing and I'm planing to get mine down when it opens.

I've been curious tho how does the car sound w/o the exhaust? I'm annoyed how quiet the car is, and I'm thinking about doing exhaust upgrades maybe a custom x pipe set up

ttboost

I couldn't find any other data regarding factory boost level, so I'm sticking with 18psi being stock. The place I bought it from said they sent it to the dealer for a "checkup"...I'm assuming they flashed it back to stock...and probably with a more mellow file.
I am ASSuming that I have a pump too. I haven't gotten it up on my lift yet, but I would think if someone went through the effort to put on a HE, they would pump it too. I'll check it soon..and do it if it's not done.

The exhaust is intoxicating..DO IT. I still have the cats, but no mufflers. It sounds awesome and passed emissions here. Very exotic just cruising around, but wails when WOT. I don't like obnoxious..and it's not. DO IT..you will not be dissappointed.

I have been considering a Eurocharged tune(s). I have actually had some email dialogue with Jerry, as I THOUGHT this car MAY have had a Eurocharged tune before. Not crazy about the 5hr drive to VA JUST to get it...Might just custom tune it local with their tune...we'll see.

alx

In theory you should see 21 psi. I personally have not seen it on any stock car. 18 sounds right.

Your 1/4 and trap sounds about right too.

You are not down on power.

pas6201

Turbo upgrades are possible for the SL65 EC has a V12TT that the build was just finished and the car will be on the dyno sometime next week for actual numbers.

If you want to talk about possible upgrades feel free to shoot me a PM or email paul@eurocharged-dc.com

shardul

iTrader: (1)

I have precision 51mm impeller hybrids on my S600 last sat my boost hit 23.5 psi on the top of third gear.
All you need to do is cooling and downpipes on these cars and they will be a beast.

Like I said 12 psi seems a bit low. You should probably get a reflash.

pas6201

I thought he said he was seeing 18psi?

greekviking

Shardul

Are you using the stock injectors with your 51mm turbos ?
Looks like you might be borderline with that setup.

shardul

iTrader: (1)

YES. bigger injectors is my next upgrade.

shardul

iTrader: (1)

info I received from the OP over PM

Max.H

Did the same, muffler delete on my buddies SL65 and it sounds amazing. I can tell you when I raced my stock e55 with ic pump against my buddies Sl65 with ic pump. He pulled away from me about 2 cars on a highway roll.

Speedriven1

We offer two types of turbo options. One being modified stock turbo's( like the one's shardul has) and second are our custom big turbo's and a complete build. We also offer great cooling modifications(our intercoolers and so on) and downpipes, along with our ecu/tcu tunes. Let us know if you have more questions at info@speedriven.com

shardul

iTrader: (1)

Compliments of Marcin @ Speedriven

ttboost

Yes..I am making 18psi, not 12.

ttboost

OK..might as well update my own thread. As you recall, I have a front mount HE, a (new) Bosch 010 pump, and no mufflers. I now have a stage 2 Eurcharged flash. Finally got on the dyno today. Mustang dyno, 60deg ambient in the shop. Baselined again today, peak numbers were 506/668 stock, and flashed was 530/754. We were very consistant with cool down and IATs, etc...These are obviously peak numbers, the power under the curve is excellent. I have 20-60whp improvement over the entire rpm range and upwards of 120ftlb improvement early on. Boost spiked at 23.5psi and tapered off to 18.5 or so. Plenty of fuel everywhere. It's a shame we can't get the boost to carry out a little bit further, car would be stupid......I'll post a cleaner dyno sheet when I get one. I plan to try another 60-130 too...been 8.16 spinning so far, preflash was 9.70.

Thanks Eurocharged.

falconsprint

You should be getting about 555-565 rwhp with a eurocharged tune.

ttboost

Thanks for the input. On who's dyno? And how is it calibrated? And with what mods? Honestly, I don't really care about the number..only care about the power under the curve. Trap speed? that number I care about. 60-130? I also care about that number too. The car is significantly faster than it was, so the number is just that...a number...

falconsprint

Here's a link to a thread with my dyno chart. This was part of a EuroCharged dyno-tune day in the SF Bay area. It was a "Dyno-Mite" dyno. I had my car baselined when it was stock. It was 490 rwhp. So an increase of 75 rwhp.

Not saying anything wrong with your car or your tune. Just giving you other data points to consider.

Also don't forget that the Eurocharged tune remaps the throttle sensitivity. In other words, it gets rid of that dead peddle feel that most Mercedes have over the first portion of throttle movement. Most likely when you say the car feels faster what you are actually feeling in the change in throttle sensitivity.

Benz-O-Rama

YES! This guy gets it! My measly ole 600 trapped 126 on a cold day with negative density altitude. ECU/TCU/Muffler delete/BMC filters. That's it, that's the list.

Dyno numbers mean squat. Now, the delta between pre/post mods while strapped down during the same session mean something. But the final figure? Meh...

1/4 trap will tell you more than any peak dyno number will, especially the back 1/2 of the 1/4.

One particular dyno shop I used to use, I don't think my car ever broke 500, same mods. Ridiculously low reading in-floor AWD dyno that reads lower than any dyno dynamics dyno, which is the traditional heart breaker.

falconsprint

ok, I understand dyno numbers are relative. But if I read post #15 correctly he only gained 25hp from the eurocharged tune. That doesn't sound right if his car was stock. Send the dyno graph to eurocharged and ask for their opinion.

ttboost

I did. Jerry is very satisfied with the improvements, and chose not to make any changes. I could probably pick up another 15-20hp, but at the risk of safety...I would rather be a little rich...err to the safe side...25hp was the smallest improvement. Made upwards of 50-60whp in most of the midrange. The car already had a front mount heat exchanger and no mufflers, so baseline is different than a stock car. I appreciate your input, and understand your point. The reality is: my results coincidently mirror the dyno sheet EC advertises on their website...give or take a few...I will try to get some more trap speed and 60-130 numbers soon. THAT will tell me where I stand in comparison to any other cars. I haven't seen many other real world numbers posted around here, so hard to tell. I would expect it to run mid 120's...It already trapped 122 and I couldn't get full throttle until the 330...I'll go back with drag radials. I've been consistantly picking up 25-26mph on the back half...so I know it's running well.

Benz-O-Rama

Wasn't a shot at you. Sorry if it came off that way. It's just refreshing to read that someone uses 1/4 trap, over peak dyno numbers to use as a barometer against other vehicles. As I sure you do, I read countless threads stating how their car put down 550, 575 etc, then you see their timeslip and it's an 11.60@120 or so.... The ET is a direct result of your 60', but the trap, that tells me everything I need to know. The back half mph gain, after the 1/8th is something that's overlooked as well. You can identify heat soak, timing issues, etc.

A dyno just cannot provide the needed CFM of air to for cars to ingest to simulate road conditions. However, they are invaluable tuning tools. Well, at least the eddy current ones are, vs an inertia dyno.


OP,
Car had aftermarket HE? My guess is the car already had some flavor of tune. Can't imagine someone adding that, without a tune too. Falconsprint is right, the pre/post gain doesn't fall in line with stock vs tuned numbers. Your ending number seems right in line though, so my guess is Jerry was able to find more, safe power over whatever was on there.

What was your AFR?

A tuned 600 and vs a tuned 65 are close enough, that you can use my timeslips as a reference. If you check dragtimes under SL600, I have a bunch up there. All were at MIR, in favorable D/A

ttboost

Yep. car had a EC front mount heat exchanger and no mufflers when I bought it. It was supposed to be flashed, but turned out it wasn't. I remember when Jerry drove it in DC, at the open house, he was so sure it was flashed, he pulled my ECU and checked it on the bench. It was, in fact, stock, which my 118 trap speed proves. I have some suspicion that someone robbed the Bosch pump, as it had the stock one. Why one would install a front mount heat exchanger and leave the stock pump is beyond me. I have since installed the 010 pump. The first time we had it on the dyno for a baseline, we made many many pulls in the 460-470 range...only after it had cooled all the way down did we made a "money run" and made the 494. So in REALITY it likely did pick up the 60-70 that eveyone thinks I am missing. Again, these are numbers are from THIS dyno, on THIS day, which is all that matters. A/F is on the rich side, which Jerry prefers (as does anyone else with common sense), and we all think that there isn't much power to gleen from leaning it out some, but there IS some safety to lose...so we are leaving it alone.

RaceHorse

Hey it sounds like everything worked out well for you. I look forward to seeing some new time slips and your 60-130 pulls. I'd guess you could expect 125-127 mph traps based on conditions. These cars really love the cooler weather.

ttboost

Well..on the way to the track this morning, I lost the right side coil. Luckily I had just left and got on the hwy, so I could limp home with half an engine. So probably no more timeslips for me this year...unless I can sneak down to E-town, which will likely net me 1 pass, before they promptly kick me out...probably not worth it for a timeslip...