Knowledge is Power

Compare Dyno Results

Search Harley engine builds with specific cams, heads, exhaust, etc. and see how they perform BEFORE you spend your hard earned dollars on buying the parts and paying to have them installed.

Harley Dyno Results

Keep Track of Your Build Details

Enter your bike and build details in your Virtual Garage and share with your fellow riders. Then upload your Dyno Chart to see the build results.

Harley Engine Build Details

Builders - Show Off!

Are you a builder? Show the world what you can do. Enter all your builds and dyno results.

Harley Engine Builders - show off your work

The Harley Davidson Performance Quest

Harley Davidson TC88 Performance

The Quest for the Ultimate Build

Harley and Buell owners are typically Harley/Buell owners because the bikes offer a great, quality platform that anyone can start with and make it their own. With a large after-market parts collection available, the possibilities are infinite. But it is also that infinite combination that can make doing an engine build intimidating and confusing. How often have you heard stories of Harley/Buell owners, in the search of the ultimate street performance build, who end up with a less than desirable outcome, resulting in more time and money to further modify their build(s)?

Welcome to, a virtual lab to share, compare, and learn the best combinations of engine parts to achieve our performance goals. So tell us about your build, and join in the quest for the "Ultimate Build"!

What Can You Do On This Site?

  • "Fill Up" your virtual Garage - Enter the details of the bikes you've owned and the builds you've completed with each, including the resulting Dyno runs, and see how your build stacks up.
  • Search Harley engine builds and see their results.
  • Compare build results on an equal playing field by comparing their TQ/CU IN and HP/CU IN ratios so see which combination creates the best torque and horsepower per cubic inch. How does yours stack up?
  • EFI Maps - It's very costly to have a MAP generated. Post your MAP file with your build and share it with others.
  • Share your build info and Dyno results with friends on Facebook, Twitter and others.

Other Info

  • This site is in Beta mode...that means it just started and may have some technical issues, and could use some functionality improvements. Please tell us about technical difficulties or give us suggestions here
  • Note you will have to register to view build details or create start filling your Garage.
Got Questions? Go to the Help page

What's New?

A New Look! - Friday, July 29, 2011
The site gets a new look and feel to be a bit more modern. We hope you like it. 
Added Graph Display of Dyno Results - Tuesday, May 17, 2011
Added a graph to be able to easily see how builds perform in terms of TQ/CID and RPM. read more ...
Added Top Ten Builds - Saturday, May 7, 2011
Added a new module on the home page to show the top ten engine builds in terms of Torque/CU IN to see who has created the most efficient engine builds. A great place to get ideas for your next Harley Performance mod. 
Share Your Dyno on Yahoo Groups - Wednesday, April 20, 2011
On your user profile, there is now a entry for the email address to post to your favorite Yahoo Group. Once logged in, click on your name in the upper right corner to edit your profile. Enter the email address to post messages to (you can get this email address from the yahoo group home page). Then when you add a new Dyno run, it will post the details automatically to your yahoo group to share with them. 
Faster to Add Build Info - Monday, April 18, 2011
Made the build information entry faster by forcing the page not to refresh every time you choose a different manufacturer or part. 
Added Help Page - Friday, April 15, 2011
Added a new Help Page

Leader Board

RankPosted ByTQ/CU INTQ
1 NRHS 1.388 101
2 Jeff Farquharson 1.260 165
3 NRHS 1.175 103
4 NRHS 1.155 124
5 Yahoo Harley TC88 1.149 109
6 fastultradave 1.147 109
8 NRHS 1.126 110
7 Yahoo Harley TC88 1.126 107
9 Yahoo Harley TC88 1.116 106
10 Peter Lawrence 1.115 107

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