V&H baffles - Page 3

Peg · 11-02-2018, 10:02 PM

I've posted previously about welding a short drag pipe baffle into the front of my V&H baffles for the Cruzer pipes on my 800. That was the perfect solution, and allowed tuning of the sound by bending the intruding tabs out of the way until I had exactly the tone I wanted, with none of that deceleration "blat".

They're readily available on Ebay for cheap.

andyvh1959 · 11-02-2018, 11:04 PM

If adding more straight through baffle with packing material to the already straight through baffle, the issue its still a straight through exhaust flow. Big part of the challenge of aftermarket exhausts is they are straight through designs, and they all lack any muffler volume to dampen out the strongest noises from the engine.

If even doubling the length of the baffles, and with packing, the issue is still that the exhaust flow has a straight path out through the baffles. The packing helps to quiet the higher pitch/high energy exhaust noise, but does almost nothing for the mid and lower sound frequencies. What I notice about hi-flow/lower noise car mufflers like from Flowmaster and Magnaflo is their designs use no packing, but feature multiple chambers and deflectors in larger volume chambers. The chambers and deflectors require the exhaust flow to make multiple turns and direction changes. Each direction change takes energy from the exhaust flow with little restriction.

I designed and built a multi-chamber/deflector internals for the muffler on my 94 BMW R1100RS, with no packing, and I got good airflow with only moderate increase in sound. No one has ever complained about the nose level. I know I got better flow because I had to adjust the air/fuel mix to avoid excessive popping on decel.

Peg · 11-03-2018, 12:31 AM

Click the link. Drag pipe baffles disturb that straight through exhaust flow, in a very similar way to what you're trying to achieve in your drawing. There's no packing material at all. Mine ended up no longer than the smallest set shown, but they were enough to quiet the obnoxious V&H Cruzers and allow me to remain friends with my neighbors with whom I share a long driveway.

starvy40 · 11-11-2018, 11:10 AM

Hey, haven't been on here in awhile don't have my nomad anymore but could you tell me what is the outside diameter of those baffles ? in other words need to know what inside of the pipes are for sliding them in.

11-02-2018, 10:02 PM	#31
Peg Sr. Member Join Date: Apr 2012 Location: West Coast, North Island, New Zealand Posts: 1,375	I've posted previously about welding a short drag pipe baffle into the front of my V&H baffles for the Cruzer pipes on my 800. That was the perfect solution, and allowed tuning of the sound by bending the intruding tabs out of the way until I had exactly the tone I wanted, with none of that deceleration "blat". They're readily available on Ebay for cheap. __________________ Nothing screams poor workmanship like wrinkles in the duct tape '02 1500 blonde Nomad (Sold) '97 800 burgundy Classic (Sold) Login or Register to Remove Ads
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11-02-2018, 11:04 PM	#32
andyvh1959 Advanced Member Join Date: Dec 2017 Location: Green Bay WI Posts: 759	If adding more straight through baffle with packing material to the already straight through baffle, the issue its still a straight through exhaust flow. Big part of the challenge of aftermarket exhausts is they are straight through designs, and they all lack any muffler volume to dampen out the strongest noises from the engine. If even doubling the length of the baffles, and with packing, the issue is still that the exhaust flow has a straight path out through the baffles. The packing helps to quiet the higher pitch/high energy exhaust noise, but does almost nothing for the mid and lower sound frequencies. What I notice about hi-flow/lower noise car mufflers like from Flowmaster and Magnaflo is their designs use no packing, but feature multiple chambers and deflectors in larger volume chambers. The chambers and deflectors require the exhaust flow to make multiple turns and direction changes. Each direction change takes energy from the exhaust flow with little restriction. I designed and built a multi-chamber/deflector internals for the muffler on my 94 BMW R1100RS, with no packing, and I got good airflow with only moderate increase in sound. No one has ever complained about the nose level. I know I got better flow because I had to adjust the air/fuel mix to avoid excessive popping on decel. Last edited by andyvh1959; 11-02-2018 at 11:06 PM.
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11-03-2018, 12:31 AM	#33
Peg Sr. Member Join Date: Apr 2012 Location: West Coast, North Island, New Zealand Posts: 1,375	Click the link. Drag pipe baffles disturb that straight through exhaust flow, in a very similar way to what you're trying to achieve in your drawing. There's no packing material at all. Mine ended up no longer than the smallest set shown, but they were enough to quiet the obnoxious V&H Cruzers and allow me to remain friends with my neighbors with whom I share a long driveway. __________________ Nothing screams poor workmanship like wrinkles in the duct tape '02 1500 blonde Nomad (Sold) '97 800 burgundy Classic (Sold)
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11-11-2018, 11:10 AM	#34
starvy40 Member Join Date: Feb 2012 Location: Springfield,MO Posts: 279	Hey, haven't been on here in awhile don't have my nomad anymore but could you tell me what is the outside diameter of those baffles ? in other words need to know what inside of the pipes are for sliding them in.
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