Jay97

Anyone have any experience with a Renntech Modified SL55 the package they sell for $15k that gives the 55 613 hp and 626 trq? Does it make the 55 capable of beating a stock SL65 ??

Juice it

Since I am a new owner I am not sure but the 65 has 738 ft pnds of torque so I think it would still take it.

DBERRY7578

I spoke with one of the guys from RennTech a while back when I had my 55, and he said that they will be about even until 80 mph, and that's when the Turbo's of the 65 will kick in, and the race would be over for the 55 shortly after!

AMG_55

i think the 55 will win, it has better top end

DBERRY7578

The 65 gets to 155 so fast that it makes the ordeal boring. The 65 is not by any stretch of the imagination limited to top end speed, that is most likely the strength of this vehicle that may put it on par with the 1/2 million dollar club vehicles.

Gustav

Online!

http://www.m5board.com/vbulletin/showthread.php?t=61192

Schiznick

The 55 has better top end? Why?

I second the comment that the 65 reaches 155 quicker than any other stock car I have driven. The mid range of this car is INSANE.

Schiz

Maff

I've raced a Kleemann stage 3 (580 bhp) SL55 in my CL65 from 70 until 160 mph and at no stage could he gain any ground. From 100mph onwards I pulled the gap bigger and bigger until the 160 limiter, and then he caught me up and overtook me, as his car had a 187mph limiter, d'oh !

v8plus4

Stock SL65 is limited to 155MPH
Renntech modded SL55 has limiter raised to 185MPH

Schiznick

My apology, I didn't realize we were talking about limiters on the cars. Sure, if your SL65 has its 155 limiter on it, then any other AMG with its limiter moved up to 186 is faster.

If they both have their limiter raised to 186 then the SL65 will reach that limit quite a bit faster than a SL55 and a Renntech tuned SL55, how is that.

My bad.

JackStraw

It is a turbocharger, not a warp drive. It is the torque produced by the V12 that ultimately allows it to pull away from the 55. The turbocharger(s) is working the whole time, not just above 80.

AMG_55

as the revs rise, the boost falls, i dunno why
supercharging a car is kinda like increasing its displacement, the behavior of the engine is the same, except more low end torque than a n/a engine, it pulls to redline, turbo cars run out of puff before they hit the redline, again im not sure why
the midrange is deadly though

Juice it

Where are you getting your info from? I have spoken to people that have owned both and all say the 600 walks away at high speeds and the 65 is on another level.

IanSL55

OK that made me laugh so hard I fell out of my chair...

~ Ian

DBERRY7578

Maybe the statement was referring to the point where the 65 turbo's become toooo dominate for the 55.

04E55 AMG

Hey Jeff,

Looking forward to some fun runs in the am. I have only a E55 with K2 so we can get a good idea when you start pulling on me. My guess from my last track day is that we will run close to the same 1/4 and trap but you would start pulling away with the increased HP&TQ over 120 mark.

If we ran a 1/2 mile run you would see the power of the 65.

Scruffyone

Another issue is the heat produced by the V12s. AMG will not provide the AMG Sport package for the SL65 because the engine produces more heat than it can shed at high speeds, hence they will not raise the speed limiter like they do on the SL55.

Schiznick

Where did that information come from?

That is not correct at all. I know three people in Germany that have SL65's that all had the speed limiter raised at AMG in Affalterbach. It is common practice in Germany to take in your SL65 and CL65 to AMG to have it raised.

None of them have had any problems at all running high speeds for long periods other than the need for frequent fuel stops

True the SL65 runs hot in general but it is within specs. Take a look under the SL65 hood and you will quickly see why. That engine is stuffed under that hood!

Maff

Yep, AMG raise it to 187mph in Europe for €2500 cost with no problems. They do run hotter than the '55s but with the extra intercoolers its not a problem, and i've never had any issues or lack of performance because of heat.

At high speeds the temperature is fine, its only at lower speeds like in traffic the temp goes up a bit more.

Scruffyone

That info came from Rob Allen at a meet we had in NJ. He said that is why the 03 Performance Package is only offered on the 55s.

Maff

Thats correct, because the '65s do not need the performance package, they already have the same brakes as the '55PP and the '55PP front fender, as well as their own oil coolers and suspension setup tuned for the bigger engine.

The only thing they dont have which the '55PP has is the increased limiter, but in Europe you order this seperatly anyway.

sprins

Since AMG removes the VMAX on 65s' in Affalterbach without raising an eyebrow there must be another reason that the 65 doesn't get the performance package. Perhaps because the 65's already have the lions share of Performance Package components installed? Just guessing.

With al genuinely due respect, does this Rob Allan person knows his AMGs? This is the 3rd questionable alleged statement from him I read here in a weeks time. About the SLR nose on the SL (which seems like speculation at this point), about the 6.2l 63 engine in the new S-Class AMG (which is being denied all over the place) and now this.

Mind you I'm not bashing or anything, just an honest question.

Scruffyone

Rob Allen heads up AMG North America. I only assume that he knows what he is talking about.

Scruffyone

I agree, most of it is there from the start.

JackStraw

That is one of the sillier things I have ever heard.