Harley Davidson Forums

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.

Need more umpf

Thread Tools
 
Search this Thread
 
Old Jul 27, 2017 | 05:16 AM
Share
  #21  
Hillsidecycle.com's Avatar
Hillsidecycle.com
Sponsor
Joined: Dec 2007
Posts: 12,084
Likes: 829
Default
Originally Posted by Road Star
Scott... I am not that impressed with the 37G cams I have in my bike - wondering if I could just drop the Andrews 26G into my current build:
98CI
10:1
Killer Carb
Daytona Twin Tec ignition
RB Racing Black Hole
no headwork

The bike currently does get up and go, but I have to really jump on the throttle; mostly upper RPM to really get it going.

Thanks! (sorry for the hijack!)
That's odd.
That 37, at 10.0 cr usually hits good.
The 26 MIGHT help, some, but the squeeze it too much for it.
Have a strong suspicion that your pipe may be a bit too free flowing.
Scott
 
Reply
0
Old Jul 27, 2017 | 08:33 AM
Share
  #22  
Road Star's Avatar
Road Star
Seasoned HDF Member
Veteran: Marine Corps
10 Year Member
Liked
Top Answer: 1
Joined: Dec 2012
Posts: 6,673
Likes: 502
From: Orange County
Default
Originally Posted by Hillsidecycle.com
That's odd.
That 37, at 10.0 cr usually hits good.
The 26 MIGHT help, some, but the squeeze it too much for it.
Have a strong suspicion that your pipe may be a bit too free flowing.
Scott
Hmmm... any recommendation on a pipe? D&D Fat Cat?
 
Reply
0
Old Jul 27, 2017 | 08:54 AM
Share
  #23  
QNman's Avatar
QNman
Seasoned HDF Member
10 Year Member
Liked
Loved
Community Favorite
Joined: Apr 2015
Posts: 6,863
Likes: 3,727
From: St. Charles, MO
Default
Originally Posted by Hillsidecycle.com
Along with S&S lifters and pushrods, cam bearings.....just about 2K.
HUGE gain for that money!!
Scott
Dang! Not bad! Not bad AT ALL! I'll pass it along...
 
Reply
0
Old Jul 27, 2017 | 12:29 PM
Share
  #24  
98hotrodfatboy's Avatar
98hotrodfatboy
Seasoned HDF Member
15 Year Member
Liked
Loved
Joined: Mar 2010
Posts: 21,139
Likes: 7,653
From: Poolville
Default
Originally Posted by Road Star
Scott... I am not that impressed with the 37G cams I have in my bike - wondering if I could just drop the Andrews 26G into my current build:
98CI
10:1
Killer Carb
Daytona Twin Tec ignition
RB Racing Black Hole
no headwork

The bike currently does get up and go, but I have to really jump on the throttle; mostly upper RPM to really get it going.

Thanks! (sorry for the hijack!)
I believe Scott is right about your pipe. I got rid of my RB Racing LSR 2-1 and put on a Supertrapp. At 2800 rpm I picked up 20% more torque. I have 2 Dyno sheets in the dyno charts section under thread "only the beginning". Check it out. The gold line in the first chart is with the LSR and the black line is with an old E pipe. The second Dyno chart is with the Supertrapp... A gain of 16 lbs of torque is huge especially at the bottom end.... And that was all because of a pipe swap....
 
Reply
0
Old Jul 27, 2017 | 01:27 PM
Share
  #25  
Road Star's Avatar
Road Star
Seasoned HDF Member
Veteran: Marine Corps
10 Year Member
Liked
Top Answer: 1
Joined: Dec 2012
Posts: 6,673
Likes: 502
From: Orange County
Default
Originally Posted by 98hotrodfatboy
I believe Scott is right about your pipe. I got rid of my RB Racing LSR 2-1 and put on a Supertrapp. At 2800 rpm I picked up 20% more torque. I have 2 Dyno sheets in the dyno charts section under thread "only the beginning". Check it out. The gold line in the first chart is with the LSR and the black line is with an old E pipe. The second Dyno chart is with the Supertrapp... A gain of 16 lbs of torque is huge especially at the bottom end.... And that was all because of a pipe swap....
I believe you. Kinda bummed, gonna have to see if anyone will want to buy it.
May have to give up some sound for performance.

Is that what I need, more back pressure; restriction at the exhaust?

Not sure how the D&D Fat Cat runs - maybe better with the quiet baffle? Maybe a little more restrictive, more back pressure?
 
Last edited by Road Star; Jul 27, 2017 at 01:30 PM.
Reply
0
Old Jul 27, 2017 | 03:04 PM
Share
  #26  
98hotrodfatboy's Avatar
98hotrodfatboy
Seasoned HDF Member
15 Year Member
Liked
Loved
Joined: Mar 2010
Posts: 21,139
Likes: 7,653
From: Poolville
Default
Originally Posted by Road Star
I believe you. Kinda bummed, gonna have to see if anyone will want to buy it.
May have to give up some sound for performance.

Is that what I need, more back pressure; restriction at the exhaust?

Not sure how the D&D Fat Cat runs - maybe better with the quiet baffle? Maybe a little more restrictive, more back pressure?
You can try pm'ing member OldEnuf2NoBtr, he seems to know a little about D&D pipes.... I've never used them....
 
Reply
0
Old Jul 28, 2017 | 06:37 PM
Share
  #27  
Road Star's Avatar
Road Star
Seasoned HDF Member
Veteran: Marine Corps
10 Year Member
Liked
Top Answer: 1
Joined: Dec 2012
Posts: 6,673
Likes: 502
From: Orange County
Default
Since my compression is too high for the 26, what would be a good low end cam for 10:1? Or, am I better off changing the pistons to lower compression?
 
Reply
0
Old Jul 28, 2017 | 06:50 PM
Share
  #28  
bad tappets's Avatar
bad tappets
Road Warrior
Joined: Aug 2015
Posts: 1,712
Likes: 410
From: Puyallup, WA
Default
Originally Posted by Byrdogone
I have a 2000 flhtci, with 88 tc. I usually ride 2 up. I'm tired of having to use full throttle when we take off. I have true duals stage 1 breather and a pc3. Looking for cam options. I guess I'm aggressive I want it to go when I twist the throttle. Thanks in advance
If you're having to use full throttle to take off, something is wrong with your motor or you're passenger is obese.
 
Reply
0
HD Forum Stories

The Best of Harley-Davidson for Lifelong Riders

story-0

Harley-Davidson Fat Boy Becomes a Dark, Decepticon-Inspired Custom

 Verdad Gallardo
story-1

6 Weirdest Harley-Davidsons Ever Sold to the Public

 Verdad Gallardo
story-2

7 Times Harley-Davidson Chucked Tradition Out the Window

 Verdad Gallardo
story-3

7 Surprising Harley-Davidson Products that Are Not Motorcycles

 Verdad Gallardo
story-4

8 Best Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-5

10 Worst Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-6

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

 Verdad Gallardo
story-7

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

 Verdad Gallardo
story-8

Harley-Davidson Reveals Super Cool Cafe Racer Concept

 Verdad Gallardo
story-9

Engraved Rebellion: Inside Bundnerbike's Glam Rock II

 Verdad Gallardo
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Need throttle response
chazzy
Touring Models
8
Jun 24, 2014 08:29 AM
98 or 117 or ??
TO34
Engine Mechanical Topics
15
May 27, 2014 05:04 AM
$$1700.00$$ Dragos Stage 1 motor kit.
DRAGO'S BIKE WORKS
Vendor For Sale Classifieds
0
Feb 27, 2012 07:19 AM
Throttle body or not?
Roy101
Dyna Glide Models
4
Sep 15, 2010 01:23 PM
How much difference?
wjl24
EVO
2
Oct 5, 2007 01:17 PM
Back to Subforum
Engine Mechanical Topics
View Next Unread
Remove & replace gears on gear driven camshafts




Advanced Search
Reply Closed Thread Share
Forum Jump

All times are GMT -5. The time now is 07:29 AM.

story-0
Harley-Davidson Fat Boy Becomes a Dark, Decepticon-Inspired Custom

Slideshow: Killer Custom's latest build relies on styling changes rather than performance upgrades, giving the cruiser an entirely different personality.

By Verdad Gallardo | 2026-06-03 18:28:05


VIEW MORE
story-1
6 Weirdest Harley-Davidsons Ever Sold to the Public

Slideshow: From military-inspired singles to scooters and three-wheel utility vehicles, these Harleys took the company far outside its comfort zone.

By Verdad Gallardo | 2026-06-02 18:34:10


VIEW MORE
story-2
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-3
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-4
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-5
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-6
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-7
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-8
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-9
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