Gadgetman Groove and real advances in engine technology

I don't think you buy anything if you can cut the groove yourself.


Doesn't mean it will work any better! There is a minor gain to be made from removing a step in the throttle body as it joins the intake that can effect flow and induce turbulence. This is done with dremel grinder.
 
I want a Duke engine too.

What is a Duke engine?

Whatever the groove is it must work. Since there is numerous vids of this guy using someones throttle body ... grinding on it. I would feel paranoid about grinding on my throttle body myself.

Thanks for the comments. I was just wondering what you guys thought.
 
Go back to the post by @barbagris - he has a link to the Duke engine team in New Zealand, and according to their web site they have an unnamed partner in the US.
 
What is a Duke engine?

Whatever the groove is it must work. Since there is numerous vids of this guy using someones throttle body ... grinding on it. I would feel paranoid about grinding on my throttle body myself.

Thanks for the comments. I was just wondering what you guys thought.

The first video is knife edging the throttle blade, nothing more, known improvement on motors where the stock TB is a restriction (on 99.9% of motors it's not until you've done extensive engine work).

The second video, he's making a cut in the wall to allow more air to pass as you gently crack open the throttle. There are NO efficiency gains here, the ONLY thing it does is make that first 2-5% throttle faster acting. As you tip it open it now flows more air with less throttle input. It's like having a faster acting throttle tube on a motorcycle. 99% of people will say "definitely gained power" "feels faster". Well duh, your getting more throttle with less pedal movement.

100% SNAKE OIL
 
To go further and demonstrate an actual throttle body efficiency improvement look at double VANOS BMWs or Mini Coopers. They use the throttle body only during warm up. Once the engine is warm they keep the throttle body open 100%.

After warm up they using cam timing as the throttle but the throttle body stays open 100%, 100% of the time. As a result you have zero delay with the throttle pedal, there is basically no vacuum in the intake before the valves, and the pumping losses are minimized leading to increased fuel mileage.

Once Freevalve tech goes mainstream expect mileage to go up 30-50%, power to go up 20-30%, broader torque curves that both start lower and carry higher, and throttle response never before seen in an IC engine. It is the way of the future, it's just a matter of the industry realizing it. Imagine a motor that ALWAYS has the perfect cam. When cruising it can act like a small cam, when passing it can act like a medium cam, when full throttle it can act like a race cam.

Daddy wants!!
 
Hear hear !!! I need someone to go into business tomorrow selling these for the Rocket, just as a demo mind you . . . and then when I'm too old to have a Rocket, this tech will be available more or less mainstream.
 
Hear hear !!! I need someone to go into business tomorrow selling these for the Rocket, just as a demo mind you . . . and then when I'm too old to have a Rocket, this tech will be available more or less mainstream.
Years ago a company called dynacam designed an axial flow radial engine, essentially a double sided piston setup. It worked brilliantly but did not get to market.

Dyna-Cam Engine Seminar Report
 
I'm not gonna look forit now, but years ago, I stumbled on a site about cutting grooves in the heads. He had dyno results, etc. etc. Supposed to direct the air/fuel mixture towards the spark plug. I have a 883 Hardley that I put 1200 pistons in, still using the 883 heads, which gives you a very high compression ratio. Some people grind out the 883 heads, I decided to cut the grooves instead. Any difference? I dunno, but it did stop my detonation and tearing up pistons. It's still running strong, (for a Hardley).:unsure:
OK, sorta found it:
 
The 883 I had was punched to 1100 with the stock heads and while a stump puller to be sure, it did fine on 87 octane.....and got 42mpg.......seems like half the bikes I've owned got precisely that!
 
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