associated is the same as 2035 thunder tiger, 053 is a copy of 9853,they both work well, i prefer the 2035

Why do you prefer the 2035?

just seemed to have more bottom end power with the pipe, wasnt a huge difference they both work better then the 2053 that comes with the promo kit, if you have a 053 or 9853 allready, go ahead and use it, you will be happy with it, if you are gonna be buying a new pipe you can get the thunder tiger with manifold from amain for 46.99

I heard that a Hong Nor 2062 go mean on a GRP 21 tuned

Anynews guys?

Are people still running os P3 plugs?

Got it.

Does anyone know the stock needle settings for a GRP 21 tuned?

HSN 4
LSN 6.5

Thanks for trying to help me, but you're way off, especially on the LSN. You numbers didn't sound right so I emailed GRP support in Italy and their reply is below:

"Please return both needles to their original position (all in). Then, turn the low speed needle fully 3,5 times out and the high speed needle 3 times out for .21 engines."

That's funny I called Horizon Hobby support and they told me 6 out on HSN and 2.5 out on the LSN. I ignored their advice since that too seemed way off.

Yeah, I would think that 6 turns on the LSN would bog any engine out there. Normally the stock settings place an engine at a overly rich setting at around 3 1/2 - 4 turns so I know that 6 turns is drowning an engine with fuel.

i was told by horizon 4hsn 2.5lsn, it seems like everyone gets a different answer

I'm running around 5.5 LSN and 3.5 HSN consistently with P3 plug temping around 185 - 190 good smoke excellent power; engine runs great. Sorry my numbers were way off for ya.

Check this out before you start running your LSN too lean. Also, it's always a good thing to use the search feature of this forum you will typically find answers to your questions before you have to ask them...

http://www.rctech.net/forum/nitro-of...ml#post4450579 Start at top of thread
http://www.rctech.net/forum/nitro-of...ml#post4711243 Start at top of thread

I'd forgotten about the search feature. Thanks. I'll check em out.

Is there any point of getting the GRP 21 promo kit because i heard the pipe in them are preety average and that the Hong Nor 2062 is way better.

Should i just buy the engine itself then instead of the whole kit?

just put in 3 tanks in my GRP 21 PROMO. By far one of the easiest engines to run in.

A++++

Cleaning up my pit boxes and I have a used GRP Ninja .21 carburetor and cooling head. Anyone interested please email me at [email protected].

Best regards,