bobbyblaze

iTrader: (1)

when i got my JPX.21 the first thing i did was took the head off take one shim out because i'm running 20%, ok now 3gallons into engine decided to to clean it up, i notice it was two shims stuck together my question is how many shims should i run or is it was a mistake that ofna put 3shims on the motor?

Maximo

iTrader: (11)

they usually come with 3 shims, 2 thick, one thin.....

bobbyblaze

iTrader: (1)

ok with that saying how many shims do i need to run with 20% nitro

Maximo

iTrader: (11)

I would run 2 thick shims for 20%

jamminbce

+1 no shims needed for 30%, unless you like your motors slower than they should be

windellmc

iTrader: (4)

I had some detonation on my first JPX running 30% without adding a shim. I added a thin shim to that one and a new JPX. They both run like a scalded dog. So I would say maybe add the shim if you want to be on the safe side. I do not think you will lose any performance.

The most important thing I have seen with these engines is the carbs have to be sealed where the aluminum and plastic meet. I also seal the pinch bolt and the banjo fitting.

triloya

What glow plug works great with the JPX .21 and 30% Byron? Os P3 or the P4 works better?
Thanks guys

Integra

iTrader: (8)

Neither...OFNA/Picco plugs is what you want to run...med or hot your choice.

triloya

Ok...thanks

stevef

Im running the JPX .28. Anyone know if a ninja glow plug will fit in there?

-Steve

Integra

iTrader: (8)

Nope...Ofna or Picco will be your best bet.

stevef

thanks, i didnt think it would but my local hobby store insisted it was fine.

Maximo

iTrader: (11)

its not worth the hassles to run anything but genuine Picco plugs....some other plugs may work, but nothing fits and works as nice as the plugs designed for the engine...

triloya

Wow...only Ofna/ Picco plugs?
The both (Amain and Carolinas) talk about safe use OS P3 and P4
http://www.amainhobbies.com/product_...ducts_id/11200
http://www.carolinasrc.com/Webstore/...idcategory=650
Are they wrong? Whats the diference betwen the OS and the Ofna plugs?
Thanks again

stevef

Im pretty sure that OS and picco have a different taper on the bottom of thier turbo plugs.