[DeathWind]

For those of you that deal with slip-ons a lot (resale or dyno operator), or if you own one of these and have heard another slip-on, how would you rank them for loudness? Preferably with a dual setup (seeing that going from stock headers to Dresser Duals increased the noise of my SE IIs a good bit) rate these slip-ons from the quietest to the loudest (i.e 1, 4, 5, 3, 2…..) Please rank them based on your experience even if it involves a couple of these slip-ons.

1. Screamin' Eagle II
2. Vance and Hines Oval Slip-ons
3. Bub Dresser Dogs
4. Cobra 4” slip-ons
5. Hooker tuned flow mufflers
6. Kerker Slip-ons
7. Python 3 ½” Slip-ons
8. Samson Silver Bullets
9. D&D 3 ½” Big Boss Slip-ons
10. Khrome Werks HP+

Additionally, if you have the knowledge or experience with various slip-ons, rank them for performance or how they felt to you. To be able to look at these results later on rank them as follows:

Sound: 1,10, 5, 4, 2, 3, 6, 8, 7, 9
Power: 9, 5, 4 ,3, 2, 1, 8,10, 7, 6

Thanks!

P.S. The goal here isn't loud or quite for me....just a comparison of all the slip-ons (yes I know all the different slip-ons aren't listed, but these seem to be the most popular).

[DeathWind]

I'm looking for ranking against other slip-ons you have owned or listened to. This will make a great reference for people looking for slip-ons. I see these forums all the time with these questions..."I want louder or quieter"... the responses I see are "I installed X brand of slip-ons and they are a lot louder"...ok louder than what? So, if you have owned a couple of the above slip-ons, compare the two or three or whatever. If a buddy is using one and you are using a different one, how do they compare in Noise and Power to each other.

[DeathWind]

Well since I didn't get the data I was looking for, I found a post from another forum that had a link to a a great comparison of 2-1 and 2-2 exhaust. The bike was a Night Train. It didn't list the partculars of the bike but I believe it had a 95" kit. All of these pipes were installed tested and dynoed.

Points of Reference *measured in dBA or decibels:
0 The softest sound a person can hear with normal hearing
10 normal breathing
20 whispering at 5 feet
30 soft whisper
50 rainfall
60 normal conversation
110 shouting in ear
120 thunder

Common items rated in decibles:
80 pop-up toaster
80 doorbell
80 ringing telephone
80 manual machine, tools
85 handsaw
80 - 90 food mixer or processor
80 - 90 blender
80 - 95 garbage disposal
90 tractor
95 electric drill

[DeathWind]

Thunderheader
Idle: 81 db / 3000rpm: 97 db
HP: 99.2
TQ: 100.7

Mid-USA
Idle: 83 db / 3000rpm: 97-98 db
HP: 96.8
TQ: 99.1

Bassani Super Street
Idle: 79-80 db / 3000rpm: 94-95 db
HP: 98.4
TQ: 99

Supertrapp – 15 Disk
HP: 93.5
TQ: 98.7

Supertrapp – 20 Disk
Idle: 76-77 db / 3000rpm: 92 db
HP: 96.5
TQ: 97.9

Hard Krome Double D
Idle: 79-80 db / 3000rpm: 94-96 db
HP: 91.8
TQ: 97.8

Hooker 2-1 Tuned Flow
Idle: 75-76 db / 3000rpm: 93-95 db
HP (set to Torque): 78
TQ (set to Torque): 96.7
HP (set to Horsepower): 91.3
TQ (set to Horsepower): 98.8

Chrome Specialties
Idle: 73-73 db / 3000rpm: 88-89 db
HP: 81
TQ: 96.5

White Brothers E-pipe – 12 disk
Idle: 78-79 db / 3000rpm: 94-96 db
HP: 97.6
TQ: 95.8

[DeathWind]

Paughco Straight 40”
Idle: 83-84 db / 3000rpm: 98-99 db
HP: 97.2
TQ: 100

Bartels Performance
Idle: 75 db / 3000rpm: 94-95 db
HP: 97.8
TQ: 99

Cycle Shack
Idle: 80 db / 3000rpm: 97-98 db
HP: 98.8
TQ: 98.8

D&D
Idle: 81-82 db / 3000rpm: 96 db
HP: 89.1
TQ: 98.3

Samson Challenger
Idle: 79-81 db / 3000rpm: 97-98 db
HP: 91.5
TQ: 97.2

Bassani Pro Street
Idle: 81-83 db / 3000rpm: 96-98 db
HP: 101
TQ: 97

Bub 2” Cone Duals
Idle: 79-81 db / 3000rpm: 94-95 db
HP: 95.1
TQ: 96.8

Hard Krome 2-2
Idle: 77 db / 3000rpm: 94-96 db
HP: 89.2
TQ: 95.5

Samson Big Gun II Cannons
Idle: 78-79 db / 3000rpm: 95-96 db
HP: 80.6
TQ: 94.2

Paughco Dual Tapered 38”
Idle: 75 db / 3000rpm: 92-93 db
HP: 82.7
TQ: 93

[DeathWind]

A lot of people debate losing power with 2-2 pipes versus 2-1 pipes. The above results are a great examples of a broad range of pipes on one bike. Here are the averages....not really enough to debate about from what I can see.

2-2
Average HP: 92.3
Average TQ: 96.98

2-1
Average HP: 92.41
Average TQ: 98.1

[aaron]

I have a 95" in a night train. 510 S&S Cams. Home brew heads with a comp ratio of 9.5-1. S&S E Carb. Crane ignition, and a Rinehard 2-1 header. I run a plug gap of .060 and produce 102.36 RWHP. As a side note I still get about 38 MPG crusin at 75-80. I'm happy with it.

[voodoo1]

Those were stats with stock "B" engines for HP?
they seem a bit high to me....Are ya sure the owners had done other performance enhancements other than pipes and Air cleaners?

[aaron]

Probably 95" engines with some sort of cam.

[DeathWind]

The link I had found in another forum was to Part 5 of the American Thunder Night Train build. Part 4 was installing several 2-2 pipes and part 5 covered 2-1 pipes. It didn't mention what they had done in parts 1, 2 and 3. It was also done a while ago through SpeedVision.com, which is now Speed TV, and I haven't been able to find the other articles. So this could be an 98 or 99 EVO version or a 2000 - 2005 TC88 version.

Ok it's 15 minutes or so since this post. The bike was a 2000 Night Train. It's amazing what you can find with a good search engine (altavista.com). Here is a link to the entire article with the 1st 4 of 5 parts: American Thunder Night Train Build Parts 1-4

Here is a link to a better version of part 5: Word Document version of Part 5