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.

2021 M8 114 w/53K - Borescope

Thread Tools
 
Search this Thread
 
Old Sep 29, 2024 | 06:28 PM
  #11  
98hotrodfatboy's Avatar
98hotrodfatboy
Seasoned HDF Member
15 Year Member
Liked
Loved
Top Answer: 5
Joined: Mar 2010
Posts: 20,850
Likes: 7,391
From: Poolville
Default

Originally Posted by xcbullet
Looks like detonation on rear cylinder, thats why its cleaner. Not destroyed yet but could use a better tune.
I would ask them to look into it as its totally stock, if it was mine I would be checking injector on that cylinder .
Do you what know what detonation looks like?? Cause that's not it.. that's a lean cylinder.. Don't fill the guys head with crisp..
 
Reply
Old Sep 30, 2024 | 06:34 PM
  #12  
xcbullet's Avatar
xcbullet
Stellar HDF Member
10 Year Member
Liked
Loved
Community Favorite
Joined: May 2015
Posts: 2,090
Likes: 304
From: mid Michigan
Default

What are all the pits in the piston top?
 
Reply
Old Sep 30, 2024 | 07:12 PM
  #13  
Max Headflow's Avatar
Max Headflow
Seasoned HDF Member
Joined: Dec 2005
Posts: 19,703
Likes: 7,887
From: poway
Default

Originally Posted by xcbullet
What are all the pits in the piston top?
Carbon flaking off? Typically when I see detonation, you can see the piston through the pits.

Here is some real slight detonation on an 11.5 to 1 131 ci motor.. Notice it's on the rear cylinder / exhaust side.


 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
D_macc
Sportster Models
14
Mar 21, 2024 11:22 AM
cwylie
Frame/Suspension/Front End/Brakes
3
Sep 5, 2023 06:07 PM
SUUIE
Softail Models
0
Nov 13, 2012 02:30 PM
ElectraRoadKing
Touring Models
2
Sep 25, 2010 11:12 PM




All times are GMT -5. The time now is 01:01 AM.