Please login or register.

Login with username, password and session length
Advanced search  
Pages: [1] 2 3 ... 6  All

Author Topic: Modifying the stock headpipe for more power!  (Read 34290 times)

0 Members and 1 Guest are viewing this topic.

Fullsac Performance

  • Vendor
  • 1K CVO Member
  • *
  • Offline Offline
  • Posts: 1760
  • Never ride with a Halfsac! Insist on Fullsac Perf!
    • AZ

    • Fullsac Performance
Modifying the stock headpipe for more power!
« on: February 10, 2009, 06:44:02 PM »

Heres a few pics I shot today while modifying a stock CVO headpipe.

Pic 1.
Headpipe VS bandsaw. Headpipe lost miserably revealing "power robbing obstruction".
« Last Edit: February 10, 2009, 06:50:06 PM by Fullsac Perf »
Logged
Steve@fullsac.com  www.fullsac.com
Never argue with idiots. They will beat you with experience.

Fullsac Performance

  • Vendor
  • 1K CVO Member
  • *
  • Offline Offline
  • Posts: 1760
  • Never ride with a Halfsac! Insist on Fullsac Perf!
    • AZ

    • Fullsac Performance
Re: Modifying the stock headpipe for more power!
« Reply #1 on: February 10, 2009, 06:47:14 PM »

Pic 2

Obstruction VS air chissel.
Obstruction lost miserably revealing how the front cylinders headpipe is extended, bringing it much closer to face of the cat. There, I said it. Cat cat cat cat.
« Last Edit: February 10, 2009, 06:57:14 PM by Fullsac Perf »
Logged
Steve@fullsac.com  www.fullsac.com
Never argue with idiots. They will beat you with experience.

Fullsac Performance

  • Vendor
  • 1K CVO Member
  • *
  • Offline Offline
  • Posts: 1760
  • Never ride with a Halfsac! Insist on Fullsac Perf!
    • AZ

    • Fullsac Performance
Re: Modifying the stock headpipe for more power!
« Reply #2 on: February 10, 2009, 06:48:30 PM »

Pic 3

Surgery over, all welded up and ready to rock!
« Last Edit: February 10, 2009, 06:51:07 PM by Fullsac Perf »
Logged
Steve@fullsac.com  www.fullsac.com
Never argue with idiots. They will beat you with experience.

RK2000

  • Junior CVO Member
  • **
  • Offline Offline
  • Posts: 69
  • FLHRSEI.ORG
Re: Modifying the stock headpipe for more power!
« Reply #3 on: February 10, 2009, 07:05:35 PM »

It's a wonder that there is any flow at all thru that pipe. It would be intresting to know how much pressure drop is across the cat.
Logged

murphy

  • Vendor
  • 2.5K CVO Member
  • *
  • Offline Offline
  • Posts: 3110
Re: Modifying the stock headpipe for more power!
« Reply #4 on: February 10, 2009, 07:14:44 PM »

Pretty nice weld there mister!
Logged

Fullsac Performance

  • Vendor
  • 1K CVO Member
  • *
  • Offline Offline
  • Posts: 1760
  • Never ride with a Halfsac! Insist on Fullsac Perf!
    • AZ

    • Fullsac Performance
Re: Modifying the stock headpipe for more power!
« Reply #5 on: February 10, 2009, 07:17:30 PM »

It's a wonder that there is any flow at all thru that pipe. It would be intresting to know how much pressure drop is across the cat.
The dyno says its about an 8 HP pressure drop.

Steve
Logged
Steve@fullsac.com  www.fullsac.com
Never argue with idiots. They will beat you with experience.

RK2000

  • Junior CVO Member
  • **
  • Offline Offline
  • Posts: 69
  • FLHRSEI.ORG
Re: Modifying the stock headpipe for more power!
« Reply #6 on: February 10, 2009, 07:20:30 PM »

8 HP is pertty significant
Logged

Fullsac Performance

  • Vendor
  • 1K CVO Member
  • *
  • Offline Offline
  • Posts: 1760
  • Never ride with a Halfsac! Insist on Fullsac Perf!
    • AZ

    • Fullsac Performance
Re: Modifying the stock headpipe for more power!
« Reply #7 on: February 10, 2009, 07:23:29 PM »

8 HP is pertty significant
Yes! And additional fuel (remapping) is required to take full advantage of the additional airflow.

Steve
Logged
Steve@fullsac.com  www.fullsac.com
Never argue with idiots. They will beat you with experience.

wreckman 42

  • Full CVO Member
  • ***
  • Offline Offline
  • Posts: 192
Re: Modifying the stock headpipe for more power!
« Reply #8 on: February 10, 2009, 07:59:31 PM »

Did you just use the pen mark to line up the pipe after the cut? Did you mig or tig it? I am pretty with a welder and am thinking about the same surgery on mine.
Logged
1956 FL Panhead
2001 FXDWG2 Switchblade
2003 Heritage Softail
2009 SE Ultra Classic

planenut

  • 1K CVO Member
  • *
  • Offline Offline
  • Posts: 1457
  • life is short enjoy the ride
    • NJ


    • CVO1: 2022 Road glide Limited Wicked orange Pearl and Blackhole
    • CVO2: 18 115 cvo limited anniversary #1068(sold)
    • CVO3: 15 cvo Limited Maroon and silver (sold)
Re: Modifying the stock headpipe for more power!
« Reply #9 on: February 10, 2009, 08:38:21 PM »

thanks Steve for the input

I will call tomarrow about sending mine to you
    thanks
        Jon
« Last Edit: February 10, 2009, 10:31:42 PM by planenut »
Logged
Fullsac headpipe TAb Performance 4.5 slash 2.5 baffles
SERT program   horsepower hd cam
freedom shields 13 in
Custom Dynamics full lighting Ft and rear
Soundz 6 speaker set up 1k amp
Legends Axeo ft and Revo A in rear

Fullsac Performance

  • Vendor
  • 1K CVO Member
  • *
  • Offline Offline
  • Posts: 1760
  • Never ride with a Halfsac! Insist on Fullsac Perf!
    • AZ

    • Fullsac Performance
Re: Modifying the stock headpipe for more power!
« Reply #10 on: February 10, 2009, 10:19:04 PM »

Did you just use the pen mark to line up the pipe after the cut? Did you mig or tig it? I am pretty with a welder and am thinking about the same surgery on mine.

I draw a line with a sharpie on both sides before I cut. Makes lining it back up idiot proof.  I Mig welded this one. The Tig would have a cosmetic advantage, but for what? Look at Harley's mig welds on both sides. It's all under the shields anyways. After the last pic, I sprayed the weld with a little Hi temp paint.

Steve
« Last Edit: February 10, 2009, 10:23:37 PM by Fullsac Perf »
Logged
Steve@fullsac.com  www.fullsac.com
Never argue with idiots. They will beat you with experience.

JP

  • Full CVO Member
  • ***
  • Offline Offline
  • Posts: 224

    • CVO1: 05 SEFB Sold
    • CVO2: 09 SERG o/b
Re: Modifying the stock headpipe for more power!
« Reply #11 on: February 10, 2009, 11:28:11 PM »

So the people here that have used the 1.6 core bit only remove the cat that is restricting the right side tail pipe? The cat is still restricting the left side due to it`s oval shape in the pipe, that the bit could not get. I this correct. Thank`s
« Last Edit: February 10, 2009, 11:30:35 PM by JP »
Logged

planenut

  • 1K CVO Member
  • *
  • Offline Offline
  • Posts: 1457
  • life is short enjoy the ride
    • NJ


    • CVO1: 2022 Road glide Limited Wicked orange Pearl and Blackhole
    • CVO2: 18 115 cvo limited anniversary #1068(sold)
    • CVO3: 15 cvo Limited Maroon and silver (sold)
Re: Modifying the stock headpipe for more power!
« Reply #12 on: February 10, 2009, 11:38:56 PM »

I would say YES     :2vrolijk_21: :2vrolijk_21: :2vrolijk_21:

since the sock pipe keeps eluding me >:(,mine will have to meet the untimely death of steve :o
Logged
Fullsac headpipe TAb Performance 4.5 slash 2.5 baffles
SERT program   horsepower hd cam
freedom shields 13 in
Custom Dynamics full lighting Ft and rear
Soundz 6 speaker set up 1k amp
Legends Axeo ft and Revo A in rear

2018_FLTRXSE

  • 1K CVO Member
  • *
  • Offline Offline
  • Posts: 2244
    • HI


    • CVO1: 2018_FLTRXSE, Gunship Grey, (Delivered July 28, 2018... after almost 9 )
    • CVO2: 2001_FLTRSEI, Grey/Black/Silver w/Hannigan Hack and a blast to ride.
Re: Modifying the stock headpipe for more power!
« Reply #13 on: February 10, 2009, 11:42:07 PM »

Takes notes and sends link to my metal fabricating buddy...
Logged

sportygordy

  • 1K CVO Member
  • *
  • Offline Offline
  • Posts: 1450
Re: Modifying the stock headpipe for more power!
« Reply #14 on: February 10, 2009, 11:49:02 PM »

You guys ain't using the 'oval' core bit  ???  :nixweiss: :nixweiss: :nixweiss:
Logged
Pages: [1] 2 3 ... 6  All
 

Page created in 0.237 seconds with 25 queries.