Do heads with 107" upgrade?
Thread Starter
|
Road Master
Joined: Jun 2010
Posts: 757
Likes: 4
Do heads with 107" upgrade?
Ok guys I'm gonna do the 107 kit but curious how much added performance the heads would add. I know its all apart and I should probably do it but I don't want to spend a grand for 4hp. Is the HP/dollar worth the investment?
Reliability is key.
Thanks!
Joe
Reliability is key.
Thanks!
Joe
Tourer
Joined: Jan 2006
Posts: 442
Likes: 0
I had the 107 installed from fuel moto and did have the heads ported and polished--- was it worth it --- yes if I hadn't had it done I would have always wondered what I was missing--- it's not cheap making hp with a Harley and my opinion it's 1,000 well spent.
Look up dan vance racing. He does great headwork. And much less than 1000 dollars.
I am getting my heads done. With a 106 there is a larger volume of air and the motor will benefit.
Stock heads already flow really well. There is good velocity right up to the 103 however bigger than 103 it begins to choke it at higher rpm.
Think about either a 58mm throttle body or get your stocker ported. Once the heads are able to flow more air the next restriction in the line is the tb.
stock Injectors are also right on their max duty rating once you get to the 106/107 range.
And a dyno tune
I am getting my heads done. With a 106 there is a larger volume of air and the motor will benefit.
Stock heads already flow really well. There is good velocity right up to the 103 however bigger than 103 it begins to choke it at higher rpm.
Think about either a 58mm throttle body or get your stocker ported. Once the heads are able to flow more air the next restriction in the line is the tb.
stock Injectors are also right on their max duty rating once you get to the 106/107 range.
And a dyno tune
Cruiser
Joined: Feb 2012
Posts: 128
Likes: 0
From: Tacoma
Road Master
Joined: Dec 2007
Posts: 885
Likes: 14
From: SoCal
Dan Vance Racing! This guy KNOWS heads!! He did a set on a 95" build I had. Was making 78 h.p. and his heads put it a little over 100/107. He did the 110 heads on my 117" and look at the numbers it is making! It is most def worth doing the heads if you want to make power! Danvanceracing.com.
Outstanding HDF Member
Joined: Apr 2009
Posts: 2,523
Likes: 3
From: Illinois
Nothing scientific, but the rule of thumb is having your heads done will add 10+ HP and torque. The price can vary depending on where you get them done.
Trending Topics
Intermediate
Joined: Jan 2012
Posts: 42
Likes: 0
From: Galesburg, IL
Do it... Don't waste another min. thinking about it. You will always wonder what if.
In Feb I drove over a 1,000 miles to have Fuel Moto do 107 kit. Heads were done... very happy with numbers and never have to wonder what if.
In Feb I drove over a 1,000 miles to have Fuel Moto do 107 kit. Heads were done... very happy with numbers and never have to wonder what if.
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Verdad Gallardo
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
Thread Starter
|
Road Master
Joined: Jun 2010
Posts: 757
Likes: 4
Well that settles it. I'm doing the heads. ow I just need to find out who to send them to. Asking what head guy is the best is like asking which cam is the best 
I will definitely check out the suggestions.
I will definitely check out the suggestions.
Cruiser
Joined: Aug 2008
Posts: 111
Likes: 2
From: NZ
I would say that it depends how you ride.I had a set of HQ heads on my 103" 09 EGS, pulled them off when I sold it and replaced the stock heads. Below 4k there wasnt much difference,extra power was only noticeable when winding it up over 4 grand. Unless you are winding it out regularly, I dont think its worth it, those extra horses only show their heads at higher rpm, your choice though.
dewky
dewky