I was doing some research on replacing my plastic intake with the SE 55mm one. While researching I saw Moonshine Harley posted a video last month saying if you can afford it to go to a 64mm on even a stage two. Im currently a 114 with a zippers 468. HAs anyone else besides them done this and can verify it's worth the money. Seems like it would be too large and slow down airflow.

 

I have a 114 with zippers 468 S&S air cleaner Bassani RR3 and stock plastic intake and wouldn't think changing it, bike runs good I would save the money for something else.

 

So that would be a manifold and throttle body change for a 114?
Wonder what their thinking is?

 

I did the SE 64 mm and manifold several years ago on my 2017 107 M8 with just a stock engine for testing. What is does require is for the ECM to be reprogrammed to make it work properly. Without reprogramming it lost lower RPM torque and HP, with reprogramming the ECM it stayed the same as the stock setup. Every throttle body made including the stock one is to large for the engine at the lower RPM area, as they must be designed to handle the engine at the higher RPM range! With the Electronic Throttle the ECM controls when and how far it opens. Set properly you can run most any of several sizes of them and your going to get the same results. If you go way to big it gets harder to control at small opening points, as it just moves to much air with very small changes in the position of the throttle but going from a stock 55mm up to the 64mm was no big deal.

 

Just curious on the test .....did it net you any gain in HP?

 

I posted one where a good friend of mine put a 64 mm throttle body on a 114 with 22xe cam.I ready didn’t think it was worth the money unless I was planning on going big bore

 

It was the same within test to test variability.

 

I added it to mine when it was a 114 with a cam and it made 4-5 tq/hp mostly in the middle to top of the rpm band. The only upgrade I made at that time was the SE 64 with a ported manifold and then a dyno run.

 

The attached dyno sheet shows a 124” with the stock throttle body and stock intake manifold making over 140 hp and torque. I doubt you would see any gain’s upgrading to. 64mn throttle body in a 114”

 

The SE version of the intake (as stated on the dyno chart) isn't the stock version being talked about. The stock version is a plastic 55mm that just sucks. Going with the SE55mm intake (aluminum not plastic) will have the same gains(ish) as the 64mm TB and manifold. But if you're going to upgrade get the 64mm setup so when you do go big bore on the engine you don't have to reinvest. Take a look at the videos my Moonshine Harley....great info and comparisons with side by side data.