How many shims for 30% nitro.

Thanks

Stick with the .70mm that engine came with, I usually run .80mm during break then reshim to .70mm after the compression seal forms and metal "pinch" is gone

Break in setup
.80mm shimming
8mm restrictor
Pretty close to tune lsn
Pretty rich top

Ok..I just bought a BONITO for my STRR Evo. Do I want to run the 2096/21 combo or the 9853/21 combo. Which pipe is better for that engine and truggy combo. What are the advantages and disadvantages of each pipe.
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anybody know where i can find a new crankshaft for my FMS, or one that will work in it?

How bad is it worn? I have a used one that still measures above 4.9 (not ideal but not bad).

plus 21-5 , plus 21-7 , plus 21-7bt , plus 21-5k and plus 2 367 cranks will work as well

lmk if you are interested in one

I believe the Toronto Nero crank will work too. Aren't they both 14.5mm?

incorrect... TORO CRANK WILL NOT WORK... they are different stroke engines...

mine is under 4.9 at the smallest point

Ok. Can you explain. I don't know what you mean by stroke. I have both and they look pretty similiar as far as fitment. It seems to fit in the case/rear bearing. The fms is double slugged, filled, and the hole in the middle is larger. While to toro is single slugged, smaller hole, and the scoop imseems to be in a slightly different place.

Sorry I am not an engine Guy. Put fuel in and go is as far as I go.

Well yours is probly in the same condition as mine then. 4.93 in the middle of the pin and 4.88 at the very edge, both measurements made at the smallest point of the circumference.

I'm no expert, but the difference in stroke if the diameter of ther crank is the same and the rods are both r7 then the difference is where the crank pin is. If it's farther out on the crank it's a longer stroke. I hope I'm not way off....

Ok well that makes sense. I wonder how far off they arey are. I can't find anything on the stroke length of the fms only the toro.

BTW what would happen if they are not the same but really close

the TORO is an Xtra Long stroke engine, with a smaller bore than the FMS. the FMS has the same bore and stroke as the P5, 21-7 series, 21-5 series, 21-4 series, etc.

The Toro has a 14.5mm crank, same with the FMS, 21-7, and 21-5 series. the P5, 21-4 series, N21s, etc are all 14mm cranks.

you could not put a toro crank in an FMS because the stroke it longer, and would push the piston up too far in the sleeve. Basically it wouldnt run right, if it even ran at all

I like the 2084 and 9901 in the bonito. The 2096 worked well in my BTT but didnt seem to work as well as the 2084 in the bonito.