Does valve job increase combustion chamber volume on twin cam 96" heads?
Thread Starter
|
Road Master
Joined: Apr 2017
Posts: 1,050
Likes: 92
From: out there
Does valve job increase combustion chamber volume on twin cam 96" heads?
Hey folks,
I've had my heads cc'd to exactly where I need them for my build, now I've decided to have a proper serdi valve job done - how much will this increase combustion chamber volume? 0.5cc ? 1cc?
Thanks for any advice.
I've had my heads cc'd to exactly where I need them for my build, now I've decided to have a proper serdi valve job done - how much will this increase combustion chamber volume? 0.5cc ? 1cc?
Thanks for any advice.
Banned
Joined: Sep 2009
Posts: 3,569
Likes: 624
From: deland,florida
Thread Starter
|
Road Master
Joined: Apr 2017
Posts: 1,050
Likes: 92
From: out there
When you say "done properly ".... what does that mean exactly? Thanks again.
Seasoned HDF Member
Joined: Jun 2017
Posts: 5,315
Likes: 4,272
From: Granville New York
he means that you should send them to a highly qualified pro like himself and not let you're drunk uncle Louie do it on his kitchen table with a grinder and a broken pair vice grips lol.
Thread Starter
|
Road Master
Joined: Apr 2017
Posts: 1,050
Likes: 92
From: out there
It's just a valve job thou - no porting
Banned
Joined: Sep 2009
Posts: 3,569
Likes: 624
From: deland,florida
not to sink the actual seat any more than needed,that said,any shop that has a SERDI machine knows what their doing (we've used our SERDI 100 for 15 years now)
Thread Starter
|
Road Master
Joined: Apr 2017
Posts: 1,050
Likes: 92
From: out there
Thank you 👍👍
Trending Topics
Seasoned HDF Member
Joined: Dec 2005
Posts: 19,863
Likes: 7,981
From: poway
Lets say that it takes about 0.005" on the valve and seat on the intake valve (1.8") and say 0.010 on the same for the exhaust valve (1.57). Exhausts can be rougher. This will increase the chamber size by about 3/4 cc. The guides are changed, it could be more.
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
Southpaw Super Glide: A Left-Hand-Drive 1979 Harley FXE Built to Fit the Rider
Verdad Gallardo
Thread
Thread Starter
Forum
Replies
Last Post
LenBoyLo
Engine Mechanical Topics
2
Nov 16, 2016 08:45 AM