Reckless

How much boost is safe for a 600?

I don't want to prematurely burn out my turbos or engine. It seems most tuners stick to 18 lbs or less.


I was surprised to find out that the 65's get different turbos than the 600s and that is why it is safer to push them to 22 lbs.

JAYCL600

depends on your definition of safe....my car at a minimum sees 18.5lbs with some boost spikes to over 21lbs. But these are peak values and unfortunately we dont get sustained boost st these levels. More important then boost is how much fuel we have at those higher levels. Although Im of th opinion that we have plenty of injector, the 65 does have slightly larger injectors to go along with the higher boost.

2003 S600

I am hitting 22.3psi with my kleemann tune, I hit limp mode starting in 5th M mode full throttle at 2000 rpm and heard a noise and boost dropped to 0. Had to restart the car b4 boost came back, could not go over 3500 rpm until I restarted. Could have been tranny limp mode also due to the torque spike, but still had all gears, just no power.

nick 55

I was curious about this several years ago and thought it was a good idea to contact the foremost MB tuners for some answers. RENNtech, MKB, and Kleemann were all very happy to discuss this topic with me and I thank them very much for that. I selected these companies to talk to based on the fact that they all have R&D budgets in the millions of dollars, and therefore can do real testing on cars before offering up products to the public that are deemed safe for the car. They all were of the same consensus that the 600 was safe at 19 psi with a short boost spike of 20-20.5 psi occasionally. The 65s were safe at 22 with an overboost of 23 on occasion, but all three found that 65 turbos were failing above the tuned 22.5-22.7 psi level. RENNtech actually observed failures of the wastegates valves at 24 psi too.

Nick

2003 S600

Maybe thats that sound I heard at 22.3psi in my puny 600, put me in limp mode I guess.

MRAMG1

Are you sure about this one? Oxygen informed me that they are the same, as is the part number

JAYCL600

they are the same "family" of turbos, the K24, but the 65's are slightly larger,

nick 55

220 S65
Left:2750902580
Right:2750902180

220 S600
Left:2750902480
Right:2750901280

MarkoCL65

I've been hitting 28-30 psi on mine (on the spike) for over a year now with no issues. Over 15k miles. Did they elaborate on the testing procedure? I wonder if they concluded that these were "limits" based on the maximum boost they were able to attain with their tunes? A stock 65 won't hit 24 psi and a highly modified 65 won't sustain 24 psi.


Engineer to Hartmutt- "It seems we cannot find a way to go over 24 psi"

Hartmutt to engineer- "Das is Good, that means if anyone is able to go above 24 they will fail like the Führer did".......... "I just know it!"

Hartmutt to public- "We have reached the limit of boost and going beyond the engineered specifications and guidelines most definitely results in catastrophic failure of proper flux capacitor fluxing and flexing therefore should be avoided in order to avoid premeditated component disintegration of components operating within the threshold of disaster"

F1BHP

6 year old thread but what the hell. What is the wastegate on the 600's set at? What boost is possible on stock wastegate?

Welwynnick

Stock boost is one bar.

shardul

iTrader: (1)

i have upgrade turbos and my boost goes to 24 psi and then starts to taper off. this is with stock air box

F1BHP

Thx shardul, so the 24psi is without a modified wastegate? Do you know what the limit is?

shardul

iTrader: (1)

you can tighten the wastegate arm and it will hold boost longer, it wont make more boost

F1BHP

So do you know at what boost the wastegate let's go. Must be higher than 24psi if that is what you are seeing. If you don't know no problem, I am just trying to find out.

Shardul how is the intercooler overflow tank working out?

TwinTurboTim

How did Marko get 851hp?