Open trumpet ms3 s52 vs obd1 epic off the shelf tune

[richardkeith97]

https://youtu.be/8IbL0bP05S4

Movie of it on the dyno

[TheAxiom]

It's done . Making pretty much peak torque right off of idle. 220-227 wtq from 2.5k - 4.25k. 235whp is enough for this car. No dips. Runs and drives perfect. The throttle response makes it feel like the car weighs 500lbs. It's nuts and a blast to drive. We did it without filters and got 7 more wtq and 7 whp. Not enough for me to ever take them off so the filters will be staying on.

Those aren't bad numbers, but you are still making approximately 220wtq from 3000RPM which is really good, but then it gives up power over 4000rpm.

If your happy that's great, but I see a lot of compromises to do it.

[richardkeith97]

We talked a lot about things I could do to get a little more power but nothing that interests me. The car is relatively quiet. Has a stock muffler and I'd like to keep it like that. With a single 3" with straight through design would be better but too loud. An airbox wouldn't make more power then open trumpets so that wouldn't get me more then another 7whp. So with proper exhaust and airbox I guess I could see 15whp more. Those are not things I'm willing to do though. It only goes to car shows and it's got to be quiet . So open trumpets and this exhaust it is

[richardkeith97]

And the sound it makes at WOT is awesome.

[richardkeith97]

It's done . Making pretty much peak torque right off of idle. 220-227 wtq from 2.5k - 4.25k. 235whp is enough for this car. No dips. Runs and drives perfect. The throttle response makes it feel like the car weighs 500lbs. It's nuts and a blast to drive. We did it without filters and got 7 more wtq and 7 whp. Not enough for me to ever take them off so the filters will be staying on.

[nando]

Sure - except its not even making more torque than a stock, unmodded BMW motor with less displacement (or even similar, stock S52s).

He asked for opinions, he's down on power - there's nothing else to say unless he also wants some help getting it set up properly.

[pazi88]

255. But its also a smaller motor (3.0 vs 3.2). Theoretically the S52 has more potential.

Well displacement only defines the torque potential. That's why it has more torque. Power is defined by how well the engine breathes (how high rpm you can use that torque potential). If only thing different between engines is displacememt, those normally make about some amount of power. But different amount of torque.

[TheAxiom]

run it without filters to see whats going on as the cam timing might be fubar, foam socks or individual filters are retarded. you need an airbox and a common filter then it'll make the same or more power as open trumpets.

He's admitted the cam timing is off, but he wants to work around it because he likes the torque.

[digger]

run it without filters to see whats going on as the cam timing might be fubar, foam socks or individual filters are retarded. you need an airbox and a common filter then it'll make the same or more power as open trumpets.

[nando]

255. But its also a smaller motor (3.0 vs 3.2). Theoretically the S52 has more potential.

A modded S52 should at least be the same - he has ITBs and standalone among other mods! It's down on power, end of story..

[pazi88]

e90 ;)

Those have 268 from crank if i remember so all lines up. When conpared to stock s52 (240hp)

[TheAxiom]

e90 ;)

Both of my E9X with the single stage made over 210whp, but about 19Xwtq. No where near that amount of low end torque though...

[nando]

us model e46 330i has 225hp from crank so about 185-195 whp. Or what kind of 330i you have.

e90 ;)

[pazi88]

that's about 20whp less than my stock 330i...

Us model E46 330i has 225hp from crank so about 185-195 whp. Or what kind of 330i you have.

[nando]

that's about 20whp less than my stock 330i...