Starting Point For Idle And Main Jets

[OneTimeUser]

I've begun design work on a telescoping intake manifold that will start out long and get shorter as RPMs increase.

Wish me luck...

 

[Edwin Spangler]

I've begun design work on a telescoping intake manifold that will start out long and get shorter as RPMs increase.

Wish me luck...

I have jokes but Ill wait to see the finished project.

Good luck!

 

[OneTimeUser]

I have jokes but Ill wait to see the finished project.

Good luck!

The joke was my plan itself.

Just fooling, though I expect such a gadget could be made and have the additional benefit of being expensive, finicky, and only marginally beneficial.

Let's hear them jokes...

 

[Whitetrashrocker]

Multi length intakes are already a thing. They use butterfly valves to switch from a long runner at low rpm to a shorter one at higher rpm.
Yes , finicky and prone to carbon fouling from egr systems.

 

[OneTimeUser]

Multi length intakes are already a thing. They use butterfly valves to switch from a long runner at low rpm to a shorter one at higher rpm.
Yes , finicky and prone to carbon fouling from egr systems.

OK, didn't know that. I guess I'll stop working on my patent application.

 

[Wicked_Daddy]

You've probably heard of variable valve timing. This is how manufacturers have dealt with the torque/HP curve. As RPMs increase, oil pressure retards the cam timing, using a computer controlled solenoid, to keep the intake valve open longer - increasing HP. There is also some overlap as this happens if it's a dual cam setup and the increased flow through also helps.

Guess we're not going to get that on these single cylinder puppies. But an idea I am thinking about is to change the intake rocker to a 1.3 rocker while keeping the exhaust at 1:1.

 

[Denny]

I have jokes but Ill wait to see the finished project.

Good luck!

Oh, I think we all have jokes. But this is a family friendly site.

 

[Whitetrashrocker]

.... But an idea I am thinking about is to change the intake rocker to a 1.3 rocker while keeping the exhaust at 1:1.

Im curious as to the gains on that. Make a new thread and post your findings.

Your not changing duration, just opening the valve a little more. The overlap wouldn't change so theres no scavaging benefits.
Maybe a slower intake velocity. Miniscule.

 

[Hellion]

I've begun design work on a telescoping intake manifold that will start out long and get shorter as RPMs increase.

Here you go. It’s even ribbed for her pleas... I mean the accordion provides turbulence so's to atomize the A/F mixture better, or whatever the concept is.

 

[OneTimeUser]

Here you go. It’s even ribbed for her pleas... I mean the accordion provides turbulence so's to atomize the A/F mixture better, or whatever the concept is.

View attachment 164604

Made my day.

 

[Wicked_Daddy]

Im curious as to the gains on that. Make a new thread and post your findings.

Your not changing duration, just opening the valve a little more. The overlap wouldn't change so theres no scavaging benefits.
Maybe a slower intake velocity. Miniscule.

To really know, I would need a dyno. The butt dyno is not going to notice the possibly tiny change, if any. At least, my butt dyno is not that calibrated. So the only other measurement will be acceleration and top speed. And that may not be enough to point at a measurable result. But I'm still curious.