It is true that without the dbkillers lose horsepower ? - MVAgusta.net
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post #1 of 13 (permalink) Old 01-27-2013, 03:42 AM Thread Starter
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It is true that without the dbkillers lose horsepower ?

Hi guys.

the other day on a track day, a mechanic told me that without dbkillers,I'm losing horsepower, What do you think?

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post #2 of 13 (permalink) Old 01-27-2013, 05:44 AM
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Generally speaking, you lose power WITH dB killer.

If you gain power on a bike with installing the dB killer, than the exhaust wasn't designed properly in the first place.
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post #3 of 13 (permalink) Old 01-27-2013, 10:44 AM
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I would disagree with the losing power without the DB killers. If anything there should be a bit more power due to the lower restriction in the end of the silencer.

Exhaust flow (both speed and volume) is an interesting topic and goes hand in hand with intake flow. I think you're just fine without the killers. In fact maybe a teeny bit lean if it was set up with them installed.

I got mine. Boy do I ever got mine.
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post #4 of 13 (permalink) Old 01-27-2013, 05:48 PM Thread Starter
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OK thanks guys!!!

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post #5 of 13 (permalink) Old 01-29-2013, 06:36 AM
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here pigeons have some cats

To throw the cat amongst the pigeons you can gain or lose power with DB killers.

It depends entirely on the exhaust design but also cam design, air box air flow, filter, velocity stacks, port design.

I've had bikes make power with baffles fitted, not lose any power with baffles removed or lose masses of power with baffles fitted.

Even on 4 strokes you need an element of back pressure so a fully open pipe can have the opposit eeffect to what is intended and actually caue flat spots, holes in mid range or poor flow at high rpm.

So in answer to your question it depends entirely on the bike and exhaust system and ther eis no cast iron rule, only a guide that says check everythign ona dyno and make a decision based on resutls only and not gossip
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post #6 of 13 (permalink) Old 01-29-2013, 08:59 AM Thread Starter
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Quote:
Originally Posted by X81 View Post
To throw the cat amongst the pigeons you can gain or lose power with DB killers.

It depends entirely on the exhaust design but also cam design, air box air flow, filter, velocity stacks, port design.

I've had bikes make power with baffles fitted, not lose any power with baffles removed or lose masses of power with baffles fitted.

Even on 4 strokes you need an element of back pressure so a fully open pipe can have the opposit eeffect to what is intended and actually caue flat spots, holes in mid range or poor flow at high rpm.

So in answer to your question it depends entirely on the bike and exhaust system and ther eis no cast iron rule, only a guide that says check everythign ona dyno and make a decision based on resutls only and not gossip
Yes,more interesting..answer is in the dino.
Thanks

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post #7 of 13 (permalink) Old 04-21-2013, 03:12 AM Thread Starter
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I have the answer, YES LOSE, we checked,specifically 2hp.

1.-Test ECU OEM whitout dbkillers:165 cv
2.-Test ECU OEM with dbkillers: 167cv , + 2 cv

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post #8 of 13 (permalink) Old 04-21-2013, 04:59 PM
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2HP?
Did you do multiple runs with each set up?

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post #9 of 13 (permalink) Old 04-21-2013, 05:36 PM Thread Starter
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Originally Posted by BSR-1 View Post
2HP?
Did you do multiple runs with each set up?
Hi.
Not, for see this may be 4.
For setting ECU M227 may be more than 90 runs, all with dbkillers.


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post #10 of 13 (permalink) Old 04-22-2013, 02:18 PM
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how is the bike now running with the microtec?
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