Engine Mechanical Topics Discussion for motor builds, cams, head work, stripped bolts and other engine related issues. The good and the bad. If it goes round and around or up and down, post it here.

124" Air cleaner confusion

Thread Tools
 
Search this Thread
 
Old Mar 9, 2019 | 06:06 PM
  #1  
superprohero's Avatar
superprohero
Thread Starter
|
Cruiser
Joined: Aug 2006
Posts: 158
Likes: 6
From: Kokomo, IN
Default 124" Air cleaner confusion

Putting together a 124" Hot setup kit on an 07 FLHRC. I'm curious if my current breather(pictured below) will be adequate. Megaflow ported S&S heads with larger intakes, Tman 662-2 cams, 58mm HPI throttle body, 5.3 HPI Injectors, Boarzilla exhaust.
Right now I have an Arlen Ness billet inverted series air cleaner which has the "Big Sucker Technology". Will this thing flow well enough to get the max out of this setup? If not what's a great, reasonably priced AC? If this sumbitch will be adequate then I don't want to go a spendin'.
 
Reply
Old Mar 10, 2019 | 07:47 AM
  #2  
Tat2u's Avatar
Tat2u
Road Warrior
Joined: Aug 2007
Posts: 1,392
Likes: 43
From: South Australia
Default

If it is ok and depending on what throttle body you are running now, at the very least the backing plate may have to be replaced or modified
 
Reply
Old Mar 10, 2019 | 08:48 AM
  #3  
hrdtail78's Avatar
hrdtail78
Road Warrior
Veteran: Marine Corps
10 Year Member
Liked
Community Favorite
Joined: Mar 2013
Posts: 1,923
Likes: 587
From: Alorton, Illinois
Default

Last 124, 662-2, with MegaFlo heads I did hit 155 hp. I suggest looking at 6.2's. As for as the AC? I have seen those handle 130 hp but haven't had it on anything that could produce higher. Only way to tell is to try it and see. I have had good luck with HPI and S&S AC's. Even with the taller filter. The S&S is reasonably priced.
 
Reply
Old Mar 10, 2019 | 09:51 AM
  #4  
superprohero's Avatar
superprohero
Thread Starter
|
Cruiser
Joined: Aug 2006
Posts: 158
Likes: 6
From: Kokomo, IN
Default

Originally Posted by hrdtail78
Last 124, 662-2, with MegaFlo heads I did hit 155 hp. I suggest looking at 6.2's. As for as the AC? I have seen those handle 130 hp but haven't had it on anything that could produce higher. Only way to tell is to try it and see. I have had good luck with HPI and S&S AC's. Even with the taller filter. The S&S is reasonably priced.
Damn, I wasn't really expecting 155hp but I wouldn't complain. It was HPI who suggested the 5.3's. He asked who was tuning and said he knew what tuner he used and should be able to get everything out of the 5.3's. I should've just got the 6.2's.
IF my AC was sufficient I was anticipating opening the backing plate up to match the HPI throttle body but if this element isn't enough it's out.
Have you tried the Arlen Ness Big Sucker II with the tall filter? I realize whatever I use I'll probably have to match the backing plate opening to the TB.
Thanks for the info!!
 
Reply
Old Mar 11, 2019 | 02:49 PM
  #5  
hrdtail78's Avatar
hrdtail78
Road Warrior
Veteran: Marine Corps
10 Year Member
Liked
Community Favorite
Joined: Mar 2013
Posts: 1,923
Likes: 587
From: Alorton, Illinois
Default

I have not used the big sucker II on anything that needed it.

Jim knows what your heads are going to flow and has always been pretty close with his hp predictions. I would suggest his input as well.

I have had great service and love dealing with the guys at HPI. I buy injectors other places.
 
Reply
Old Mar 11, 2019 | 04:24 PM
  #6  
donk_316's Avatar
donk_316
Road Master
Joined: Sep 2007
Posts: 1,045
Likes: 74
From: AB, Canada
Default

Get one that moves the filter farther away from the engine. That thing will just suck hot air all day long.
 
Reply
Old Mar 11, 2019 | 04:58 PM
  #7  
strych9's Avatar
strych9
Seasoned HDF Member
5 Year Member
Liked
Community Favorite
Top Answer: 10
Joined: Aug 2017
Posts: 7,323
Likes: 11,762
From: Omaha,NE
Default

I have the HD Heavy Breather with an oversized K&N filter for my 120", per FM's recommendation.
 
Reply
Old Mar 11, 2019 | 06:38 PM
  #8  
cdonis's Avatar
cdonis
Outstanding HDF Member
Joined: Jul 2013
Posts: 3,245
Likes: 297
From: Escalon ca
Default

R&R cycle overflow with the +1 filter👍
 
Reply
HD Forum Stories

The Best of Harley-Davidson for Lifelong Riders

story-0

7 Times Harley-Davidson Chucked Tradition Out the Window

 Verdad Gallardo
story-1

7 Surprising Harley-Davidson Products that Are Not Motorcycles

 Verdad Gallardo
story-2

8 Best Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-3

10 Worst Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-4

Killer Custom's Jail Break Is The Breakout That Refused to Blend In

 Verdad Gallardo
story-5

Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?

 Verdad Gallardo
story-6

Harley-Davidson Reveals Super Cool Cafe Racer Concept

 Verdad Gallardo
story-7

Engraved Rebellion: Inside Bundnerbike's Glam Rock II

 Verdad Gallardo
story-8

10 Motorcycles You Should Never Buy

 Joe Kucinski
story-9

10 Things Harley-Davidson Needs to Fix in 2026

 Verdad Gallardo
Old Mar 13, 2019 | 04:15 AM
  #9  
Hillsidecycle.com's Avatar
Hillsidecycle.com
Sponsor
Joined: Dec 2007
Posts: 12,084
Likes: 829
Default

Which ever one you go with should not show much difference on, or off.
If it pinches the power you just paid to establish, ditch it.
Scott
 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
VDeuce
Milwaukee Eight (M8)
25
Feb 27, 2018 11:33 AM
marvo75
Touring Models
2
Mar 17, 2014 01:48 PM
Tedjay
Touring Models
6
May 18, 2013 08:35 AM
ilovemyskidoo
Dyna Glide Models
6
Jun 13, 2012 11:49 AM
RiderX
Touring Models
10
Jun 26, 2007 01:50 PM




All times are GMT -5. The time now is 04:16 PM.

story-0
7 Times Harley-Davidson Chucked Tradition Out the Window

Slideshow: Harley-Davidson built its reputation on nostalgia, but every so often, the company took a hard left turn into the future.

By Verdad Gallardo | 2026-05-20 11:18:19


VIEW MORE
story-1
7 Surprising Harley-Davidson Products that Are Not Motorcycles

Slideshow: The bar-and-shield logo shows up on far more than motorcycles, some of the company's most unexpected products have nothing to do with riding.

By Verdad Gallardo | 2026-04-29 16:50:35


VIEW MORE
story-2
8 Best Harley-Davidson Motorcycles Ever

Slideshow: Not every Harley gets it right, but these are the ones that genuinely earned their reputation.

By Pouria Savadkouei | 2026-04-15 14:23:21


VIEW MORE
story-3
10 Worst Harley-Davidson Motorcycles Ever

Slideshow: From the troubled AMF years to modern misfires, these bikes earned reputations for reliability issues, questionable engineering, or disappointing performance.

By Pouria Savadkouei | 2026-04-01 20:01:09


VIEW MORE
story-4
Killer Custom's Jail Break Is The Breakout That Refused to Blend In

Slideshow: Killer Custom's "Jail Breaker" build focuses more on stance and visual aggression than mechanical overhaul.

By Verdad Gallardo | 2026-03-18 19:20:32


VIEW MORE
story-5
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?

Slideshow: The Swiss custom shop has taken a Harley Softail and stretched it into something so long and low that it looks closer to a rolling sculpture than a conventional motorcycle.

By Verdad Gallardo | 2026-03-07 16:15:30


VIEW MORE
story-6
Harley-Davidson Reveals Super Cool Cafe Racer Concept

Slideshow: Harley-Davidson's new RMCR concept revives the café racer formula with modern hardware-and it may be exactly the reset the company needs.

By Verdad Gallardo | 2026-03-04 12:23:37


VIEW MORE
story-7
Engraved Rebellion: Inside Bundnerbike's Glam Rock II

Slideshow: A standard cruiser becomes an intricate metal canvas in the hands of a Swiss custom house known for pushing Harley-Davidson platforms far beyond their factory brief.

By Verdad Gallardo | 2026-02-24 18:19:44


VIEW MORE
story-8
10 Motorcycles You Should Never Buy

Slideshow: There is no shortage of great motorcycles to buy, but we would avoid these ten.

By Joe Kucinski | 2026-02-19 14:50:51


VIEW MORE
story-9
10 Things Harley-Davidson Needs to Fix in 2026

Slideshow: Harley-Davidson's challenges aren't abstract; they show up in dropping shipments, shrinking dealer traffic, and strategic decisions that aren't yet translating into growth.

By Verdad Gallardo | 2026-01-13 18:33:17


VIEW MORE