I thinking in buying a new maxpower sl3 and the pipe combo. Just wondering how this engine is on reliablity, power and ease of getting parts.

very good engine. One of the best. It's a hand modified novarossi, so it is top quality with some increased power.

very high compression, with locking at top dead centre that lasts for at least 5 litres after break in


you will need to purchase 2 conrods extra with this engine, and change the conrod after about 1 litre after break in, and aftereach 5 litres after this also. it is very tight and stays tight (locking at TDC) even after 5 or 6 litres of racing.

i would recommend installing an extra copper shim durin break in and leave it instaleld for around 10 litres. take it out after this.

if you blow plugs, these are the first signs that you need to change the conrod immediately. I started cracking the plug elements, and didn't pay attention, i then blew a plug my next race day, and it pitted to button and top of the piston. This was due to a worn conrod. This occured to me 2 litres after the break in process.

i broke the engine in using heat. 1 tank idling at about 80 to 90 degrees, blipping throttle occasionally.
tank 2 did the same with more frequent blips of throttle
tank 3 i started driving it, making sure temps stayed above 90 degrees.
i used runnertime (JP racing fuel) 16%

parts are very hard to come by, i purchased some parts from pro shop futaba, Nexus racing also stocks parts. Novarossi parts (12 SCT) engine are identical, except for the piston and sleeve. The Max SL3 MF edition has a matched piston sleeve combo.

Do you realy think this normal production model is handtuned ?
It is just a Novarossi engine fabricated to the better/tuned specs of Fantini and all is just made by machines.

i think the internals of the case are hand modified. you can see that it has been dremeled out at the top of where the large bearing sits. i doubt that they developed a machine just to do this specific job.

i'm refering to the MF worlds edition though, not sure about the standard SL3, yes the sleeves might be machined though.

So, knowing that the Max Power and Novarossi mills are the same, I currently own an older .21. An XR Fantini that needs new internals. P/S/R. Will the new PLus stuff work? Or, do I need to stay with the non-Plus items ie. 321P etc.? Thanks

yes it will!!! r7 and the piston sleeve will work from the plus

thanks guys, I appreciate it!!

make sure to check your clearance and shims. have fun

will do captain. thanks. Any clue as to a reference point? The ol XR is worn from only one season of mild to heavy use. temps under control etc. but became hard to use so I took it to a local Max Power sponsored driver and he recomended an internal rebuild. Should I keep the stock shims in place? 30% nitro,,,in Houston no less. Thanks,

well if you are going to use the new stuff get the new head button and start with stock xrs which is two .30 shims but you have to check the new button first

Captian,
you referring to the plus 21-35 stock as opposed to Tuned? Y/N?

21-35. stock and the max xrs head shims set up

Ah! I got it. TY

let me know how it works out for you