Re-mapping - N/A V8

[Alex_225]

Just wondering if anyone had experience of re-mapping any normally aspirated Merc V8 engines and if it's worth it?

I have re-mapped at least two turbo diesels and the results were great, I had a re-mapped turbo petrol and again that was great too.

The car in question is a CL500, so it's not slow anyway, about 380bhp. It seems re-maps on a much larger normally aspirated engine offer some pretty solid gains. Around 20bhp and 30lbs-ft seems pretty decent, I'd anticipate better throttle response too.

Has anyone mapped an N/A V8?

[ConnectionError]

I would not bother to be honest

I looked at doing a 3.0 bmw and the conclusion was that it was not worth it

[Alex_225]

ConnectionError said:

I would not bother to be honest

I looked at doing a 3.0 bmw and the conclusion was that it was not worth it

Not much to be gained?

I certainly wouldn't entertain it on a small engine but seems the big V8s could offer a decent gain.

[Terzo123]

The M156 power plant can map very well, mainly due to it being restricted from the factory depending on application.

Its was restricted for use in the W204 C63 - 450bhp
Unrestricted in the E63 it was over 500bhp.

Pretty simple for tuners to remove the restriction and find a little extra with many mapping to 520 bhp without much issue

[Alex_225]

Terzo123 said:

The M156 power plant can map very well, mainly due to it being restricted from the factory depending on application.

Its was restricted for use in the W204 C63 - 450bhp
Unrestricted in the E63 it was over 500bhp.

Pretty simple for tuners to remove the restriction and find a little extra with many mapping to 520 bhp without much issue

I have heard that. I have a CLS63 and was aware it was basically restricted in the C63s. Also considering that engine was used in the SLS which I think had 600bhp (albeit with some tweaks) it's clearly capable.

I'm wondering more about the 5.5 in my Cl.

[0a]

I am very happy with the map put in my SLK55. It was a lot pokier when I drove it away from the tuner. It went from 354 to 390, with bigger gains in torque.