Honda Spree and Elite 50 Forums

That looks bigger than the turbo that was on my A4 1.8

Spreetard wrote:

Now that...um yeah...custom intake...

Now thats cool

...Huge, nasty ports and all anyone sees is my airbox...

It is half of the intake turbine from an 80's Ford Probe. The intent is to quiet the intake down with minimal restriction, though I fear it may do the opposite. If all else fails, it looks cool.

Do you have any idea how long those ports took to do?

Some people just don't appreciate art


Above; my lowly stock 39mm bore in race clothing.
Below; Polini's piece de resistance, the Corsa


It's not the almighty corsa, but I bet I can coax some very high rpm figures out of this bore.

Sorry,

That knife edge on the port looks like it would likely cut a finger. I have not had the courage with the rotozip to go that level of perfection with the metal removal. Great job!

Nice job on the polishing of the intake side of the transfers. I might be wrong but I think that knife edges are not the best shape for a leading edge of an aerodynamic surface.

The rotating bits in the crankshaft cause a lot of turbulence. I think you could get aerodynamic shear and some stalling of air flow. A radiused edge might be better.

elitedio wrote:Nice job on the polishing of the intake side of the transfers. I might be wrong but I think that knife edges are not the best shape for a leading edge of an aerodynamic surface.

The rotating bits in the crankshaft cause a lot of turbulence. I think you could get aerodynamic shear and some stalling of air flow. A radiused edge might be better.

Hmmmmm.... I never really thought about the turbulance of the rotating assembly... any more input on port theory would be appriciated, it's a definate learning curve. Trial and error are a large part of tuning.

Not a very serious thought here...but I immediately thought Windage Tray when rotating assembly turbulence was mentioned. Maybe its possible! Though I dont see how at the moment...

Spreetography wrote:Not a very serious thought here...but I immediately thought Windage Tray when rotating assembly turbulence was mentioned. Maybe its possible! Though I dont see how at the moment...

Not with a 2 stroke. You have to let the mixture have access to all the moving parts to oil them.

A windage tray is to scavenge the oil away from the rotating assembly and get it back into the crank case asap, since the oil is fed to it under pressure from the oil pump. With a 2 stroke you want that oil all over the crank to oil the bearings.

nice looking port job u got there, and that corsa pic looks familiar, too bad she is lots more worn now

And finally,an update!!!

I am getting my new carb and intake this week, a 21mm OKO with the CT manifold.

Now I need to pick a pipe. Has anyone found a pipe to really wring the power out of the stock 50cc bore, or has everyone just done big bore kits as the starting point? I intend to build my 50cc bore and get my clutch and transmission parts first, then finally buy myself a 72cc setup, most likley a Corsa. I need the bike to be reliable for long rides. The primary goal is to be able to run 55mph down the highway with a little spare throttle for passing and hills.

I really want to find a scorpion pipe for the Corsa, but want to see what the limits of the stock bore are first. Does anyone know of a pipe that would run the stock bore and still work well for the corsa?

Speetard, your 21mm carb and ct intake are in.

My 21mm carb and intake is ON! Now for some gears and a pipe

Some Pics of the running spree-dio.

dont worry spreetard ill let you touch my corsa when it comes