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.

Quick reving

Thread Tools
 
Search this Thread
 
Old Dec 11, 2017 | 10:35 AM
  #1  
Clayton24's Avatar
Clayton24
Thread Starter
|
Club Member
5 Year Member
Photogenic
Photoriffic
Liked
Joined: Aug 2017
Posts: 570
Likes: 43
From: Coal grove ohio 45638
Riders Club Member
Default Quick reving

what is a real quik reving engine combination say 103-110 cu in? Thanks for all replies and info !
 
Reply
Old Dec 11, 2017 | 10:46 AM
  #2  
jbarr1's Avatar
jbarr1
Road Master
10 Year Member
Liked
Joined: Nov 2015
Posts: 1,230
Likes: 380
From: georgia
Default

Quickest reving comes from full throttle with the clutch in! Sorry, couldn’t help saying that. I’m sure you’ll get an intelligent answer soon.
 
Reply
Old Dec 11, 2017 | 11:10 AM
  #3  
Clayton24's Avatar
Clayton24
Thread Starter
|
Club Member
5 Year Member
Photogenic
Photoriffic
Liked
Joined: Aug 2017
Posts: 570
Likes: 43
From: Coal grove ohio 45638
Riders Club Member
Default

Lol ! Thats forsure
 
Reply
Old Dec 11, 2017 | 02:32 PM
  #4  
bustert's Avatar
bustert
Seasoned HDF Member
15 Year Member
Liked
Loved
Community Favorite
Joined: Aug 2008
Posts: 5,048
Likes: 990
Default

soooooo many factors. it stands to reason that less recip weight will get to speed quicker. another is stroke as the shorter distance to move is quicker.
 
Reply
Old Dec 11, 2017 | 04:08 PM
  #5  
2013_FLHTK's Avatar
2013_FLHTK
Road Warrior
10 Year Member
Liked
Loved
Community Favorite
Joined: Oct 2013
Posts: 1,399
Likes: 1,040
From: Seabrook, NH
Default

I made my previous 106 engine build rev quicker by changing the gearing.
 
Reply
Old Dec 11, 2017 | 08:15 PM
  #6  
98hotrodfatboy's Avatar
98hotrodfatboy
Seasoned HDF Member
15 Year Member
Liked
Loved
Top Answer: 5
Joined: Mar 2010
Posts: 21,014
Likes: 7,545
From: Poolville
Default

Lets see, High flowing heads, big cam, Bigger T-body and injectors, hi compression pistons, good ignition, good 2-1 pipe, Port match intake, 3.37 gear ratio.

Or should I have said a phone call and about $3-4k. Kirby or Scott, Wide open Cycle. Theres a lot of good guys out there.
 

Last edited by 98hotrodfatboy; Dec 11, 2017 at 08:16 PM.
Reply
Old Dec 11, 2017 | 10:43 PM
  #7  
Max Headflow's Avatar
Max Headflow
Seasoned HDF Member
Joined: Dec 2005
Posts: 19,830
Likes: 7,968
From: poway
Default

Without changing the flywheel mass the quicker reving motor will be the one with higher cold cranking compression and a good tune and pipe.. Bigger displacement will help as you can only generate so much pressure without detonation. Bigger displacement will generate more force on the flywheel at the same pressure so it will spin up faster.
 
Reply
Old Dec 12, 2017 | 08:47 AM
  #8  
Clayton24's Avatar
Clayton24
Thread Starter
|
Club Member
5 Year Member
Photogenic
Photoriffic
Liked
Joined: Aug 2017
Posts: 570
Likes: 43
From: Coal grove ohio 45638
Riders Club Member
Default

Originally Posted by Max Headflow
Without changing the flywheel mass the quicker reving motor will be the one with higher cold cranking compression and a good tune and pipe.. Bigger displacement will help as you can only generate so much pressure without detonation. Bigger displacement will generate more force on the flywheel at the same pressure so it will spin up faster.
ok im startin to get it ! Thanks for all replies
 
Reply
HD Forum Stories

The Best of Harley-Davidson for Lifelong Riders

story-0

7 Surprising Harley-Davidson Products that Are Not Motorcycles

 Verdad Gallardo
story-1

8 Best Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-2

10 Worst Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-3

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

 Verdad Gallardo
story-4

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

 Verdad Gallardo
story-5

Harley-Davidson Reveals Super Cool Cafe Racer Concept

 Verdad Gallardo
story-6

Engraved Rebellion: Inside Bundnerbike's Glam Rock II

 Verdad Gallardo
story-7

10 Motorcycles You Should Never Buy

 Joe Kucinski
story-8

10 Things Harley-Davidson Needs to Fix in 2026

 Verdad Gallardo
story-9

Southpaw Super Glide: A Left-Hand-Drive 1979 Harley FXE Built to Fit the Rider

 Verdad Gallardo
Old Dec 12, 2017 | 08:49 AM
  #9  
Clayton24's Avatar
Clayton24
Thread Starter
|
Club Member
5 Year Member
Photogenic
Photoriffic
Liked
Joined: Aug 2017
Posts: 570
Likes: 43
From: Coal grove ohio 45638
Riders Club Member
Default

Originally Posted by Max Headflow
Without changing the flywheel mass the quicker reving motor will be the one with higher cold cranking compression and a good tune and pipe.. Bigger displacement will help as you can only generate so much pressure without detonation. Bigger displacement will generate more force on the flywheel at the same pressure so it will spin up faster.
ive been wonderin how much ccp one can get away with on a wet head ! I always ride one up !
 
Reply
Old Dec 12, 2017 | 09:22 AM
  #10  
Hillsidecycle.com's Avatar
Hillsidecycle.com
Sponsor
Joined: Dec 2007
Posts: 12,084
Likes: 829
Default

Originally Posted by Clayton24
what is a real quik reving engine combination say 103-110 cu in? Thanks for all replies and info !

Your 57 cams, 110" S&S kit, 10.2 cr, a set of our HMM Stage II Heads, and your t/body modified, with a 2/1 D&D Fatcat.
It'll come on VERY quickly.
Scott
 
Reply



All times are GMT -5. The time now is 10:20 AM.

story-0
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-1
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-2
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-3
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-4
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-5
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-6
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-7
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-8
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
story-9
Southpaw Super Glide: A Left-Hand-Drive 1979 Harley FXE Built to Fit the Rider

Slideshow: Graeme Billington's left-hand-drive Shovelhead is as much about problem-solving as it is about classic Harley form.

By Verdad Gallardo | 2025-12-30 11:27:08


VIEW MORE