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View Full Version : S/C Elite Muffling Dilemma



sputhester
01-10-2010, 08:22 PM
I would like to use the appropriate muffler for my custom 2:1 exhaust. Engine is a rare aftermarket Harley/Sputhe headed xr style engine. 3.188" bore x 5" stroke: 80CI / 1340cc, dual 40 mm cv carbs. My 2 head pipes are 1&3/4" and 30" long to collector.
I would like the capability to be fairly quiet.
I ordered the S/C Elite stainless 24" overall 22" case 443-2524, 2.5" inlet w/ 4" discs, but this may be too long for my application.
I understand the Universal assemblies use a 2" or 2.5" core on the 4" disc units.
The 1.75" and 2.0" inlets using a 2" core.
The 2.25" and 2.50" inlets using a 2.5" core.
I was wonder if I could go with a S/C Elite stainless 17" overall 15" case 443-2017, 2.0" inlet w/ 4" discs to get more muffler packing area, or will this 2" core restrict my flow?
I notice most aftermarket 2:1 exhausts have a 2.5" collector which I plan to use unless otherwise recommended.
What do your comparable 2:1 exhaust systems use for a muffler core size?
Please advise me of technical thoughts. Thanks in advance Chad Hart

bschultz
01-11-2010, 07:42 AM
Have you considered P/N 443-2517, 17" length w/2.5" inlet dia.?

sputhester
01-11-2010, 08:41 PM
Yes i have but I figured the 2" core would give me another 1/2" packing for muffling, I dont want it to be obnoxiously loud. Do you suggest I sick with the 2.5" core? What do the 2:1 systems use for a core and length?

bschultz
01-14-2010, 07:17 AM
Older models 2", newer models 2.5" with the collector size being consistent with the core.
The 2.5" core is NOT going to be that much louder on your application, definitely not "obnoxious". Plus why not take full advantage of the 2.5" collector your planning, rather than reducing it down to a 2". You can control exhaust flow (and sound) with the amount of discs.