Drilling the air cleaner backing plate
Thread Starter
|
Novice
Joined: Apr 2006
Posts: 23
Likes: 0
From: Knoxville, Maryland
Drilling the air cleaner backing plate
I tried the search option but, did not find anything. I have read several post about people drilling the air cleaner backing plate. Is there a how to somewhere?
Elite HDF Member
Joined: Dec 2009
Posts: 4,598
Likes: 14
From: navarre ohio
unless your trying a cheap stage one(wont work rite anyway)drilling it just lets intake noise out,and does nothing for performance..i had a stage one ac with out a tuner..it sounded like a huge suction everytime you throttle,like it was hyperventilating..performance seems better with the stock ac too..if your changing the pipes and tuner..just get a SE airfilter..i bought mine used for $15 from pinwall cycle off ebay(actually i live 5 min away), came with everything including another ac cover
Thread Starter
|
Novice
Joined: Apr 2006
Posts: 23
Likes: 0
From: Knoxville, Maryland
unless your trying a cheap stage one(wont work rite anyway)drilling it just lets intake noise out,and does nothing for performance..i had a stage one ac with out a tuner..it sounded like a huge suction everytime you throttle,like it was hyperventilating..performance seems better with the stock ac too..if your changing the pipes and tuner..just get a SE airfilter..i bought mine used for $15 from pinwall cycle off ebay(actually i live 5 min away), came with everything including another ac cover
Outstanding HDF Member
Joined: Oct 2007
Posts: 2,398
Likes: 34
From: Newport news, Virginia
Any opening other than the one in the bottom improves breathing. Its like breathing through your open mouth and breathing thru a straw. You will have noise regardless. It that was true all the screaming eagle and open filter medium filter systems would be screamers! The filter on my ride has large openings in the front but is also open on the backside. I did this to a Sportster AC (drill the backside out) and the difference was noticeable and stealthy!
Last edited by DrPlastic; May 13, 2011 at 03:48 PM.
Thread Starter
|
Novice
Joined: Apr 2006
Posts: 23
Likes: 0
From: Knoxville, Maryland
Yes, I believe so. I believe the thread was in reference to excess oil coming from the breather.
Trending Topics
Seasoned HDF Member
Joined: Jun 2006
Posts: 28,520
Likes: 3,953
From: Vermont
Then I drilled holes in the bottom of the standoff on each side and threaded in a NPT to barb fitting. On these fittings I attached oil line and clamped with the HD oetiker clamps.
I then ran both lines to a tee fitting that sits behind the air cleaner cover and then ran a single line down and around the cam chest (attached to a clamp on one corner) and then ran the line behind the exhaust and underneath the frame.
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Verdad Gallardo
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
Seasoned HDF Member
Joined: Jun 2006
Posts: 28,520
Likes: 3,953
From: Vermont
