About a month ago I started my "Thinking about Turboing my Harley" thread: https://www.pilotsofamerica.com/community/threads/thinking-about-turboing-my-harley.125316/ In which I tossed around the idea of throwing a cheap Chinese turbo on my Harley to increase the horsepower on it. Towards the end of the thread I'd gone more in the direction of doing a cam swap both for the simplicity as well as the fact that I'm not a fan of turbo lag and the packaging of a turbo on a motorcycle is not very ideal. If you think about where you sit on a motorcycle and where there's space to put a turbo, there's just not a very good place that doesn't get in the way of your legs to some degree, or your passenger's legs if you have a passenger (and I do from time to time). Then add in the fact that on these engines you really do want a charge air cooler of some sort and it gets big fast. Can it be done? Sure. Is it ideal? Probably not. Here's my wife's and my bikes before last weekend's ride. Mine is missing the windshield because it was warmer and sometimes I'll remove it for more airflow: My motorcycle is a 2009 Harley FLHTCUi, or Electra Glide Ultra Classic aka Geezer Glider as some call them. The stock ~65 HP output would be best described as "adequate", but the XKR has a better power to weight ratio and better acceleration, especially once you get up to speed. My with and I bought this (and her matching bike) as our "forever" bikes, and we really do love riding the things. However I have never been satisfied with the horsepower output on mine, and from day one wanted more power. For normal general acceleration and a more gentle roll-on, it's fine, but when you go from a gentle roll-on to full throttle, there just isn't much more power there (more noise than anything). Higher RPMs produce a bit more power, but not a ton. We bought my bike in 2011 with a hair over 3,000 miles on it, now it has a hair under 10,000 so it's still a relatively low mile bike, especially for one of these. As it so happens, one of our members here on PoA is an investor in DynoJet (I'll let him reveal himself if he wants to). For those not familiar, DynoJet produces upgrades for the powersports market, most notably tuning modules as well as custom dyno tunes. They were interested in helping out with my upgrade. We had some discussions and agreed that the best path to move towards what I wanted is a naturally aspirated upgrade path. Not just because of the packaging concerns, but also because what I like out of an engine is a snappy response and I'm not a fan of turbo lag. Really, the initial motivation of the turbo had more to do with idea of putting on a $100 turbo more than that being the ideal solution. So after some discussions, Dynojet helped put a package together for my motorcycle and a full on plan. I'll be installing some fun goodies from S&S: - 110 cubic inch big bore Power Package - El Dorado Mk45 muffler/header Package - Chrome Stealth Teardrop Air Cleaner Kit This will be a fun full package that will address all aspects of what it takes to make more power. Cams on their own can make a big difference on these engines, with the big bore kit adding to that further. The nice part is that this is a bolt-on with no machining required, although obviously tearing into the engine pretty significantly. I've started looking through the manuals and my intent is to do this with the engine left in the bike. Unlike the cylinders on our aircraft engines, the heads on the Harley will unbolt separately from the cylinders, so you don't need as much space to pull a full assembly off. The intake and exhaust will make sure that the extra air can flow through unrestricted, and I think the exhaust being a true dual setup will sound really good. I'm also going to bring the bike in for an initial dyno run to get the baseline output in its current configuration and then when it's done bring it for a proper dyno tune. I'm going to be really curious to see the results from this. A lot of you know I spent a few thousand hours running engines on dynos, and this will be the first time in a while I'll have gotten to do upgrades to an engine and see the true before and after numbers as well as the calibrated butt-o-meter performance. It'll be the first time that one of my personal vehicles has been on a dyno, to. This is extremely cool for me on a lot of levels. For one, this is the kind of project I live for, and the most real "Ted" kind of project I've done in a while. Getting to take a vehicle I own, do significant upgrades, and then enjoy the benefits is at the core of what I've always enjoyed doing. This also scratches the engineering side of my brain, getting to see the dyno runs to show just how much power is actually being gained rather than just guessing. Obviously the Cobra is something I'm immensely enjoying too, but it's a different level, being a complete vehicle. Really I'm an engine guy, and this is about engines. I'm also very grateful to Dynojet for wanting to help out on this project. Having a sponsor/partner in this is very cool, and I know is going to help produce a better end result that I'm going to be happier with. Parts started arriving yesterday. Like with the Cobra, I'll be making some YouTube videos to share too. Not directly related to the project, I will be putting new tires on the bike. The ones on it are getting flat spotted in the middle (especially the rear) so it was time for new ones, especially with the extra power output. I've been looking over the bike otherwise and really the rest of it is in good condition. I may find some other items as I get into it that need replacing, but right now it has no oil leaks, the rear belt is in good shape (and from what I've read they should hold up fine unless I'm doing burnouts - which I don't do on motorcycles). We'll see what I find as I get into it. Vroom vroom.