3.75 turns high and low will get you close , adjust idle accordingly and pull slide barrel out when setting the low

+1 on that , big difference from tuning my plus 4 to my jx ninja!!

So can most, but Monty has probably forgotten more about these novarossi engines than I will ever learn. His R2R motors are the real deal...

For 99% of the time on any give race day; I agree.

Once set, it's pretty rare I have to rock my LSN more than a blade width.

Try that at the nitro pit in october ! Will not get you through the race , hell your engine changes tune during the race , sucks!!

Thanks Q

Hi guys i run my novarossi plus4 engine with Byron Gen2 2500 fuel i need to change the shimming ?The manual and at the novarossi site said to run 25%...
I need to remove shim?

Ideally you should replace the .20mm copper shim with a .15mm brass shim part# 03003 I believe but it will not hurt a thing running it like it is . 30% is the way IMO

Hey Monty

What are some of the advantages of runnig 30% nitro over the lower percentage fuels ie; 20% or 25%. I know you get more power from 30%, but
alot of the on-road guys are now runnig the lower percentage fuel, is it more mileage? I talked to a famous engine tuner/modder awhile ago and he said
he uses the lower percentage fuels. I plan to move from 25% nitro to 30% and was just curious.

i prefer the performance of the 30% over lower nitro , thats the advantage , some have been running 35 and 40%

lower nitro fuels will be easier on your engine for sure provided its a good quality fuel with proper lubrication and you properly maintain all components that go with your engine . the onroad guys are probably switching so they dont have to maintain there engines every other run with new rods and bearings , i want to run 8th scale onroad but wouldnt wanna pay for it

on the .12 rossi I got in my crt.5....I got the mid flush like you said...and reset the lsn at 2.5 turns out and still cant stop the huge hesitation when you punch it......am I wrong on 2.5 out on the lsn....???

i really couldnt tell ya exact needle settings on the .12 engines but i believe its around 1.5 but dont quote me on that .

The tires are the killers in 1/8 scale Nitro on-road, one 20 minute main
and they are through ($50+). The sound and speeds are out of this world, plus you need good reflexes.

thanks for the infos but the 03003 is .20mm shim... My plus 4 have 3 shims 2 silver and one brass you said me to change the one brass with a 0.15?You know the part no?03002?
thanks

i have raced 8th onroad and was actually driving with guys that you see in the spotlight , not too far behind

i love the sh!t !!! very addicting and i wish i could afford to do that . i would not want to have to support the engine bill though