SL55/63/65/R230 AMG: euphoriaDSM SL65 Build Journal
I'd bet the gain in power was from the removal of restrictive stock air boxes. Did you ever trying running your custom intake before adding the intercoolers? When I added my catless downpipes you could feel the car run out of breath around 4000-4500 rpms with the stock air boxes.
As far as the plugs I run the stock plugs. I haven't had any issues running MS109 WOT in the mile a handful of times, even the mile and a half once hitting the 200mph mark. I'm not sure if I'm leaving anything on the table, but I don't want to be playing games guessing with an alternate and getting misfires. There are just too many plugs, and not so easy to get to.
On another note when are you going to beat this record of 212mph in a SL65? If this was a little closer or if I was a little less responsible with my money, I'd love to give this a shot. Living in NY makes this a $4-6k event for shipping, flights and hotels, loss of work, bla, bla, bla. Then my wife is going to think she deserves more than a $15 per week allowance if we have that kind of money to burn. Haha... Anyway, see the link below if you already haven't. The website shows this car hitting 184-185 in the 1 Mile, it only makes me wonder what my car would do given a little more distance.
The Best of Mercedes & AMG
Good video from the Renntech SL65!
Here is a Video from the new Brabus Rocket 900 (S65) - which shows 211,5 MPH but after 1,86 Miles instead of 2,3 Miles.
There was a lot of knocking on Brabus-Tuning in the past here on MBWorld, but this big heavy S-Class seem to be running strong.
The globs of torque is what helps these car up top, but for drag racing and sticky tires it just breaks parts when you try to utilize it off the line.
Your car is reference for me what can be achieved with stock turbos. Renntech gets 185 mph in the mile with just 700 CRANK HP. Your car is a little faster with ??? Crank HP. Brabus claims 900 Crank HP which should be spprox.800 whp on a Dynojet.
When I compare your speed for 1 mile and 1.5 mile and what you gained from 1 to 1.5 miles and put it in relation to 211 Mph from Brabus at 1.83 miles, it shows me the 900 HP Claim from Brabus is realistic. Of course we dont no exactly the drag, which fuels were used and wind rtc.
But the first comparison shows me the Rocket 900 is one of the fastest and strongest M275/M279 out here. And the power is there up to redline when you see how fast it gets in 6th gear redline. When I remember correctly it shifts into 7th nearly at 340 Kmh.So not only torque in the midrange but also HP on top of the revrange (because of the bigger turbos and nice manifolds)




SL65 Video
Regardless of what you do, good luck with the car. You've kept it clean, I'm sure it will look amazing either way.




Whatever you decide, it looks like you will handle it tastefully in any event, so good luck with the path you take.






