HarleyTechTalk

Technical Forums => Shovel Head => Topic started by: randallwhitman on November 03, 2008, 11:38:59 AM

Title: drag pipes
Post by: randallwhitman on November 03, 2008, 11:38:59 AM
After many years of running mufflers, I'm going back to drag pipes.  What baffles do you guys recommend to reduce SOME of the noise, and give the old shovel enough backpressure to perform ok?  Thanks, Randy    P.S.  Check out www.hackerpipes.com   
Title: Re: drag pipes
Post by: pappyfreebird on November 03, 2008, 12:06:53 PM
loli pops  ..there cheap n easy (like me) n adjustable
Title: Re: drag pipes
Post by: stroker800 on November 03, 2008, 07:00:55 PM
I run any drag pipe over 40" long with lollypop valves at the end. My shovel now has "gutted" mufflers on it with lollies in, yes it is loud.
Dave
Title: Re: drag pipes
Post by: buzzurd on November 04, 2008, 04:01:03 AM
Just installed Khrome Werks "HP-Plus" baffles in my 2 inch X 40 drags.They are not much quietier but definately have provided more torque and throttle response. You can feel the difference.
Buzzurd
Title: Re: drag pipes
Post by: Hillside Motorcycle on November 04, 2008, 09:47:58 AM
We use 1/4" bolts, 1 1/2" long, with 4, 5/16" nuts stacked on the bolt. About 3 inches from the end.
Title: Re: drag pipes
Post by: randallwhitman on November 04, 2008, 10:17:01 AM
Thanks guys.  I'm removing my Kromewerks muffs to do this, so I'll go with their baffle.
Title: Re: drag pipes
Post by: rkrcpa on November 09, 2008, 07:40:32 AM
I've got an 88" Shovel FLH and recently switched to staggered slash cut duals from 40" drags with HP-Plus baffles. I was hoping to tone down the noise a bit and gain some low end torque. I don't think that it was enough of a switch to neccesitate a jetting change but the bike is nowhere near the same on the highway. With the drag pipes I could jump on it at highway speeds and it would pull hard all the way to way too fast. Now it just kinda mopes along. My long winded way of saying I ran many miles with the HP-Plus baffles and I think they were probably the best performing pipes I've had on the Shovel.
Title: Re: drag pipes
Post by: shoveled71 on November 09, 2008, 09:01:12 AM
After many years of running straight drag pipes I put a set of true dual fishtails on it, had a dead spot at 50 mph,Tried all the jetting combos and nothing worked till I put the Kromewerks baffles in it, runs better now than it has in years.  Spike
Title: Re: drag pipes
Post by: NormL on November 11, 2008, 11:06:00 AM
Try the bolt trick first, then try the baffle and see if it's any better.  I run 28" L x 1-3/4" drags with a little home made baffle.  Kind of like the mini baffles but without the step, less back pressure but breaks up the reversion pretty well.

Title: Re: drag pipes
Post by: dave_9113 on November 11, 2008, 05:42:22 PM
Quote from: Hillsidecyclecom on November 04, 2008, 09:47:58 AM
We use 1/4" bolts, 1 1/2" long, with 4, 5/16" nuts stacked on the bolt. About 3 inches from the end.

I'm running extremely long drags pipes...I mean upswept to the height of king & queen seat.  (100 " front, 68" rear).  Anyway, do you think the stacked nuts on bolt or the lollipop style (on Nightrider.com) will help to give some backpressure?

dave
Title: Re: drag pipes
Post by: pappyfreebird on November 11, 2008, 05:50:15 PM
i like lolipop washer fer reasons of sorta adjusable...but thems sum longuns yer talkin there,,id run me a bolt er two in where the upsweeps a slid on..thall create more reverbin
Title: Re: drag pipes
Post by: dave_9113 on November 11, 2008, 06:03:30 PM
Pappy...know what you mean.  How would I get them at the upswepts, if that's what you mean, rather than toward the end on one continuous pipe. Just straight round shots, no fishtail. 
Title: Re: drag pipes
Post by: pappyfreebird on November 12, 2008, 04:49:18 AM
dayum thems is one  peice ..thats alota pipe..well i dont know how fussy ya r,, but the easiest that comes ta mind...is drill n run the bolt in n zap a tig er mig tag on it ..the bolt goes in from under n inward sosin wouldnt see it anyways,,,n id also make sure i ain near that bend,,id be befoe er after it  ,,,nuff stress there awready,,,wehres the pix a this rig its be cool ta see   paps   ony reason i say befoe bend  is them pipes draw eyes n a bolt stickin in em up in the air...well like me id unnerstand cause its rideabilty befoe looks (aw L that reminds of a bruthas wife aw cheeyut i wont go there )wahahaha
Title: Re: drag pipes
Post by: dave_9113 on November 12, 2008, 07:15:03 AM
Pappy, you want to see some pipes....here you you!  :smilep:

(http://i514.photobucket.com/albums/t342/nhan9113/Pictures%20for%20Ding/Karen.jpg)

dave
Title: Re: drag pipes
Post by: pappyfreebird on November 12, 2008, 02:25:31 PM
thems simply beechin dude!!! they gotsta cackle like L dont they...seems the longer ya go the mo cackle ya git ..dig the oil filter placement too..oh n i have a drag king queen short back thatd look rad on there too,,,leavin jus a sissy stickin way up,,kinda aways liked them like that,,,heres mine a few yrs back

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