Spark knock after cam install & tune - Road Glide Forums
Engine Related Engine Builds and more for Road Glides

 
LinkBack Thread Tools Display Modes
post #1 of 4 (permalink) Old 04-08-2019, 05:55 AM Thread Starter
Hangaround
 
SJA66's Avatar
 
Join Date: Nov 2014
Posts: 84
Spark knock after cam install & tune

2015 RGS, Cyclerama 570-2, S&S lifters and Quikee rods, had it dynoed, finally got to do an extended ride today and noticed what sounds like a spark knock when I roll the throttle under a load, it goes away after the RPMs get past 3200, sorta sounds like some gravel going thru the fender. Is this from the cam, lifters, rods, gas or maybe tune. any suggestions would be great, I want to get this resolved and really not sure where to start.
SJA66 is offline  
Sponsored Links
Advertisement
 
post #2 of 4 (permalink) Old 04-08-2019, 05:54 PM
Banned
 
Join Date: Feb 2019
Posts: 72
If you had it dynoed that shouldn't be going on, are you maybe lugging that motor before you wack it.Is it doing it in 1st gear ? Just thinking out loud here,i myself would bring it back to yer dyno guy and tell him whats going on.
Mike
post #3 of 4 (permalink) Old 04-16-2019, 01:24 PM
Hangaround
 
army12b's Avatar
 
Join Date: Nov 2015
Location: Kansas City
Posts: 151
Agreed, it's most likely the tune, don't wait take it back to the tuner or at least call him, just probably needs some tweaking and will be all good.
army12b is offline  
 
post #4 of 4 (permalink) Old 04-16-2019, 03:16 PM
Life Member
 
Thermodyne's Avatar
 
Join Date: Jan 2014
Location: South Central PA
Posts: 1,756
Garage
Needs to have some spark backed out of it at lower rpms. Its a common problem with pressure (torque) cams.

Many dyno operators really only have one goal, maximize torque and HP results. For street driven vehicles you often have to leave some of that power on the shelf, and tune for drivability.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Thermodyne is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Road Glide Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Milwaukee 8 spark knock 17RoadGlideSpc Engine Related 40 10-21-2018 07:16 AM
Survey request: 103s with spark knock StriderJim *General Road Glide Discussions/Pictures 33 01-29-2012 08:52 AM
Is anyone having trouble with Bad Spark Knock? Dandy1 *General Road Glide Discussions/Pictures 66 08-24-2011 06:49 PM
UPDATE my 5x7 Hogtunes speaker and amp install SKULLZ Aftermarket Accessories 8 04-06-2010 09:45 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome