VS_Rody

Maybe, but in any case this R21 is a good replacement solution.

rick oxley

how would the 2102 crank perform with the 2103 piston/liner set.as i have a 2102 that needs new piston/liner and don't no wether to fit 2102 or try 2103 set

VS_Rody

The parts are interchangeable(compatible) between the 2 engines. The liner of the 02 and 03 have the same timing. Just slightly different exhaust shape.

I would appreciate to keep this thread related to VS Racing engines.
I am taking time to reply but also appreciate your support.

rick oxley

thanks rody, i posted here because i value your input. sorry did not mean to hijack your thread this is an old os engine but i have made the switch to vs ready for next year and this thread has been a great help.i had the choice between the vs02 or the vs03 and went with the vs02 just becaue the 2103 engines are a unknowen to me, but keen to learn more

thanks again rick

VS_Rody

Hi Rick,

No problem you are always welcome to ask.
FYI between the 02 and 03 versions there are some minor changes made to the inlet timing of the crankshaft and shape of the exhaust. The result is that the 03 version has in my opinion a better torque and throttle response. but for the rest the engines are tuned and used in the same way.
Our VS engines compared to the OS engines, they are basically the same but I have made a specific designed combustion chamber and made some extra hand tuning on specific parts on the engines where I thought this could make a difference.

pressure

iTrader: (3)

Hi Rody,

I have a VS03 that has a scratch on the piston, I purchased a OS Speed R2103 piston/ liner con-rod to replace it. Is the 2AY03010 Piston/Liner/Conrod the same as VS R03 VS04003 on your site or is it compatible.

thanks

bertrandsv87

iTrader: (2)

Just get a new motor Coach......

VS_Rody

Hi,
Yes, the part#2AY03010 is the same as VS04003, so you can replace it without any problem.
Be careful at the first stages of running with a new piston/liner and take your time running it in.

nitrodude

iTrader: (8)

Does anybody know if the 2103 comes with the 16% button?

VS_Rody

The VSR03 comes with a 16% button but due to the specific shape can also be used with 25%

ipws

Is that mean it is not require to change anything or I need to add 0.1mm head shim for 25%?

VS_Rody

In our VSRacing engines, no need to change anything. When using 16% you can take out one shim of 0.1mm but the gain is not really noticeable, so we leave things as they are.

Roelof

Depending the track it is sometimes usefull to play with an extra shim or take out one shim. It can just give that little bit extra which you are looking for.

Giant655

iTrader: (5)

Can you elaborate on this if possible? Would like to learn more about it

Roelof

Because our engines work on self combustion the ignition timing is set by the combination of the glowplug number, nitro content and compression. By changing these numbers you can shift the ignition timing.

On short tracks you can take out an 0.1mm shim giving more bottom torque but less top RPM (and with that also the chance of blowing plugs when running too much rpm or going too lean on the needles)
On large tracks you can add an 0.1mm shim so the engine can run higher revs but it will loose a tiny bit bottom torque.
And with todays 0.15 and .25 shims you can even finetune in 0.05mm steps headplay.

Also the milage can be afected by these changes.