EricSMG wroteWhere are you test driving the car? If your just flooring it on highway entry ramps it won't feel 'woah scary' quick if you are used to fast cars. It should still feel quick though. Floor it on a twisty road above 4k RPM and you will realise how fast it actually is. The refinement and smooth torque band really masks the delivery, particularly in a wide open space.Okay - spent some time reading older posts (circa 2012) about the Vishnu/Procede meth setup, and others. Some of your posts, etc.
I still have more reading to do.... however:
I think what I'm experiencing is the S65's sensitivity to octane and ambient temps. If it's anything like the S54, it's very inconsistent in its power output. Here in Cali with 91 octane, the 46M can really fall flat on it's face at times, particularly in warm weather. Sometimes the car will rip and other time feel like an Accord 4cyl as th ECU is pulling timing like crazy in certain conditions.
So, the S65 is probably even more sensitive and I'm probably feeling that as I drive more of them. In fact, yesterday while driving the '09, I actually heard a slight engine "ping" just after an aggressive upshift, which was both alarming AND confirmation that the motor wasn't happy = low on power. It was warm yesterday, about 85* F, and for all I know Carmax had 87 octane in the tank and/or crappy gas. And that particular car may be on "old" software, see point 3 below.
More research to to do, BUT, I'm intrigued by:
1. Primary cat delete/xpipe : dynos show big bottom/mid gains even on facotry BMW tune
2. Making sure that the car has the latest factory BMW tune (apparently some early tunes were "slow" and not all cars were updated)
3. Proper tune (ideally with meth, is this still relevant?) for maximum consistency and big top end gains.
I know this is really old stuff for you guys, but I'm literally a totally noob when it comes to this platform BUT I'm really interested in making the switch... but only if the S65/E9XM platform can actually be super fun/responsive/quick in NA form without having to always be above 6k rpm. Sounds like it can be.
Also as you mentioned, they are quite sensitive to ambient temps. In the North East winters my car feels quicker, no doubt about it. It certainly revs more keenly. I only run the car on 93.
The example you drove my also be a little tired, when were the spark plugs last changed on it?
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:D:D