jaka

Hi!
Who makes the Kyosho GX.40 engine?
Is it the same Chinese manufacturer that makes the Magnum line of engines??

asmund

That sure looks like a Magnum or ASP. I would be surpriced if that engine is not made by Sanye. Where did you find it?

Motorboy

Yes, it is a Magnum/ASP engine but there are "K" instead "Magnum" in the crankcase and are made for Kyosho who need engines included in their models such as in model airplane, -car and -boat.

I has Kyosho 52 FS 4 stroke engine and it is same engine as a Magnum/ASP 52 FS.

w8ye

My Feedback: (16)

I notice how the only "K" or Kyosho words are on removable parts?

Kmot

My Feedback: (24)

I want one of those Kyosho valve covers for my FS-52!!!!!!!!!!

Motorboy

See at the engine GX .40 has "K" are at the crankcase, a little change with text at the pattern before the pattern are ready to use in casting of crankcase.. The rectangle formed part at crankcase are still same as in Magnum engines, but removed in 4 stroke engine.

jaka

Hi!
Asmund ...Kyosho sells them: Some are mounted" ready to race" in their ARF Calmato trainer airplanes.
Tried one engine yesterday...remarkable! very smooth and very powerful. Turns a 10x6 RAM plastic prop at 14100rpm on 80/20 castor oil fuel....just a tad better than the Webra .40 GT which is the best .40 sport engine on the market.
We use these .40 engines in our Q-500 pylon racing class over here in Sweden

estradajae

In my humble opinion, it identical to a magnum engine, for some reasons:

The thrust washer is the same to the magnum's.
the exhaust port in the block, where it meets the muffler is unmachined (it has a rough finish) as the magnum
The barrel looks identical to the magnum.
The rear needle assembly is identical to the magnum.
Even the drilled muffler plate that goes inside de muffler is the same

And magnum rules!!

HAIDAR

DEAR MODELERS
     WHERE CAN I BUY THESE ENGINES?

jaka

Hi!
You can buy them from many hobby shops...or from e-Bay. ASP .40 is sold by HiModels in China and it's the same engine but the ASP has a slightly smaller rear silencer opening than the Kyosho GX.40.

captreza

does anyone know that this engine is ABC type or not?

fiery

My Feedback: (2)

It is ABC.

Jaka, those figures are extremely strong. I have the Webra .40 and cannot get those RPM's on FAI fuel, which it runs really well on. It is the early ringed version though.

How good is the Kyosho .40's throttling on FAI fuel?

jaka

Hi!
All .40 engines today except the Rossi (and MVVS) are ABN.

Try a Nova Rossi 4 or 4A plug...or Merlin! Difference isn't very large though from using ordinary OS 8 or Enya 3 plugs ...but slightly better in favor of the former.

Sorry! But the old ringed Webra .40 is no mach for the more modern Webra GT .40 (or ASP/Kyosho .40) ABN engine!

Both the Kyosho GX .40 and Webra GT have instant throttle respons using 80/20 fuel (Castor oil) . The same when using 15% all syntectic oil (Motul "micro" or Aerosave) 5% nitro and 70% methanol fuel which is my ordinary fuel mix when sportflying.

The Kyosho GX .40 is set up for the Amercan market where it's common to use 15% nitro, so if you want best performance from 0-5% nitro you better remove one or two of the 0,2mm head shims. The engine is easier to set, rew better and throttle better that way.

fizzwater2

My Feedback: (61)

Careful, Jaka - not ALL .40's are ABN.

Perhaps all sport engines, or all mass-produced engines, but things like the Jett racing engines are AAC, with real chrome I believe.

fiery

My Feedback: (2)

The ASP's and SC's engines I have benefit from true hard chrome plating in the cylinder.

They are a few years old though. Has Sanye changed it's plating to nickel?

Mr Cox

No, they haven't as far as I know, and he picture above also shows an ABC set-up....

jaka

Hi!
You are correct!
They are ABC!

Yeah! I know about JETT, Profi and Nelson...But they play in another league!

Pippin

The ABC lines is great indeed. The only problem is the ball bearings used in the ASP/Magnum/SC engines. Until the liner is completely set, you might change the ball bearings once or twice. But you can get new bearings easily.

Jezmo

My Magnum and Chinese made SuperTigre are both hard chrome/brass liners. I have a friend that has the Kyosho 40 in a Calmato and it runs extremely good.