For this test we used the same 2008 E90 M3 tested against our own Project E46 M3 last year.
We Test the BimmerWorld Exhaust and Epic Motorsports ECU Tune for E90/E92 S65 V8 BMW M3
We get torque out of this 4.0-liter!
When the S65 4.0-liter V8-powered M3 was released, enthusiasts loved the power, thanks to its 8000-plus RPM capability. However, many also deemed it not torquey enough for a V8. It wasn’t that the engine was bad—it’s just that it was a small V8, and small displacement usually doesn’t make a lot of torque (but give it a lot of RPM and it can make power!).
Actually, for a 4.0-liter, the S65 was making plenty of torque with a rated 295 lb-ft of twist. The problem was those people were comparing it to the famed S54 engine found in the E46 M3, which was rated at 262 lb-ft with only 3.2-liters, with that difference cut in half when it came to rear-wheel dyno testing. So, unless you really wrung the V8’s neck, the “feel” between the two cars wasn’t a whole lot different, especially after all of the anticipation of “an M3 with a V8!”
Don’t get me wrong—I love the S65 V8. With eight individual throttle bodies I think it is absolutely awesome, both in sound and performance. But we found a quick little fix for you track guys wanting a good chunk of that midrange torque back, while gaining a significant amount of top end to boot. Enter BimmerWorld and Epic Motorsports, two companies that the BMW diehards know very well in the racing communities.
Today we will be testing BimmerWorld’s resonated racing front X-pipe…
…which has been tuned for maximum safe power and torque by Epic Motorsports for a superior off-the-shelf package.
In order to make sure everything would be running properly, we refreshed the oxygen sensors with these Bosch upstream from Sparkplugs.com, which has good online pricing and saves lots from the dealer.