i presonally havent done a teardown on a c5q to tell you what it is . let me research and see if i can cross reference parts for ya .

Max Power MX .21 Max C5Q Competition Off Road Engine
[MXP21MAXC5Q] Low Price: $299.99



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This is the MX 21 C5Q nitro off road engine from Max Power.

Specifications:
Capacity: 3.49 cc
Power: 2.65 HP
RPM: 32,000 g/min.
Bore: 16.42mm
Stroke: 16.42mm
Ports: 5
Sleeve: ABC
Piston: Die Cast
Crankshaft Diameter: 14mm
Crankshaft with Tungsten: No
Silicone To The Inside: No
Crankshaft Type: Turbo SG
Glow Plug: Standard
Carburetor: Single Adjusting
Weight: 330grams
looks like square bore/stroke , novarossi cranks will not work

maybe the old sbk one but good luck finding one of those .

still looking for parts list

got a question, was thinking of putting a toro nero in a buggy with an re-11 pipe (the re-11 so it wouldnt be so rippy) yes I know there is a scientific combination of pipes that would maybe be better and there are other inexpensive pipes that work also, but my concern is runtime (10 on any track) and smoothness, as I have heard this is a truggy motor but also heard the plus 4 has more torque.... any thoughts??? houstin?????

Monty i have order two 97t Plugs to give them a try ...i broke in the plus 4 and i run it with Nova plugs i will have problems if i put the 97T?I mean problems for the sealing...
Also i am waiting the 0.15mm shims that you told me... I run byron 25% you suggest me to change the shimming now ( i have burn 1 gallon) or to wait to loose some pinch or to leave the shiming stock?
Thanks i will try also the 9901 at my 41021 header because from the 053MR i am disappointed about the run times...
The plug affect the run times??When i will try the 97T i will post review

anyone using RB cp-02 turbo plug and NOSRAM turbo 6 (#94765) plug on the plus 4?





the threads look a bit different but the shop owner keep saying it can be used... anyone?

That nosram plug looks very os plugish , RB plugs were made by novarossi , not 100% sure if they still are but I would venture to guess that they are so no issues there .

Odonnell plugs are the same as nova plugs

monty,

unfortunately i can't find any OD plugs here, the shop owner did mention this RB plug is made by Nova, i am asking for double confirmation as i am afraid the wrong thread might ruin a good button head...

If I get a N21R, what plug should I get? I live in North Florida, weather is going to very hot and humid soon. I run 20% Odonnell.

has anyone else had any of these n21r's breaking cranks. I have broken 2 one had 2-3 gal, and my last one just was broke in like 3/4 gal and they snapped crank from the nut out with clutch bell still attached to both, i,ve ran same exact setup with several motors and no problems ever!!! this is crap. Would it do me any good to try contact nova?? also does anyone have a turbo button for a p5 they would sell?











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I haven't had any problems with any of my 100's of customers who have bought n21r or n21bf limited engines . The only one which did have any issue was one guy had stripped the threads that hold the flywheel nut on but I have seen that on other engines as well .

I would have to guess that you are running a vehicle with a whooole lot of chassis flex or something ?
Not saying its not entirely out of the question that there could be manufacturing defects but if you seem to be the only one that has seen it then that's why I say check your car first .
The turbo head you are looking for is part #28002

I believe the Nosram Plug is made by SH.... If they are what I think they are I would not use them... I found the Sh plugs to have very fragile coils that did not last well....

i run an 8t2.0 and has some flex but no other engines have done this? ive ran the p5 awhile and no probs! what is the price for the head?

http://www.houstonsengineservice.com...a8ea33372d1102

Hmmmm , interesting on the crank .

I will do a little more research on the crank subject

Was just wondering if anyone can help me was have heard rumours that the toro nero is no longer being made is this true?

I have a toro that I wNt to run in a losi 2.0 truggy. Does anyone have any suggestions as to which clutch springs to use?

As much as you can find !