So you're saying on Nova like my P5-based Maxy Cinco I can remove 0.2mm of shims and run a C7TGC on 30% with a good tune, good fuel and I won't have detonation?

Easy ! just have to be sure engine is loosened up

Nova's have the biggest shim stack of all the engines...average being 0.7 mm between piston and button....a stock XZB Sopeed has 0.4 mm between piston and button ( And can run a P3 )

Very good to know! Engine's got about 4 gallons so it's good to go. I've been looking for more top-end so I just got a 9886 per your recommendation and I'm going to throw a 41019 on it too. Should be a screamer. Thanks for the info Sir.

that is the main reason why OS Speeds are so fast compared to most others...having the head tight like that makes a massive difference in performance.. An engine can have the best port timing, the fanciest crankshaft, all the bells and whistles and if the head isn't tight enough it will all add up to nothing...Its amazing having a dyno and being able to see how much effect the shims have on power...egnines that are known to be mild can simply be over shimmed and can turn into total beasts just by lowering the button by a shim or two.... conversely add 0.3 mm of shims to a OS Speed and watch what happens to it ! will go from wild to mild instantly......

also to add here...when you do drop shims you must be careful not to run it too lean...use the glowplug as your canary in the mine and if you see any distortion in the coils its not happy..either fatten it up, run a cooler plug or add a 0.1 mm back to it....They can run really good this way but have less tolerance for being lean, thats when they will start to detonate....

New engine- Drake special edition 5 port

http://novarossidirect.com/ADAM-DRAK...FF_p_3411.html

Looks kinda cool, not sure what it's all about though. There's not much else out there on it, except I'd guess it's mostly based off the Rex R21 Plus5

Steel bearings looks pretty basic and cheap to be a special edition

The main question is if you do need ceramics. I am pretty sure that 99% of the drivers or lets say 100% of the non sponsored drivers do not need it.

I've already got a #7 plug in it from the last time I ran it in the summer. I'll pull 0.2mm of shims, fatten it up and tune from there.

What do you think about the 9886/41019 combo on a Cinco BT in a buggy? Hopefully I'm not going to lose too much bottom.

+1

Novarossi steel bearings are good bearings

it will will probably have better bottom then all the 3 chamber pipes like the 2096 and 9901

anyone know where the mc8 and mc9 plus fit in around novas plugs, got full sheet of each id like to get rid of as they are almost ten years old

Hello, I'm still pretty new to nitro. I have a Mito4/021/2096 in my RC8B3. How would a 9901 perform compared to the 2096?

Slightly less top end, slightly more bottom end. Not a whole lot of difference...

What's the trick/purpose of the 3 needle carbs? I just pulled the trigger on a mito7 for my truggy....noticed a 3rd needle...what's really for?