anyone else experiense the cooling fins to fall off?Never happend to me before with novarossi.
The pinch in this arrow is nothing conpered to nov 4btt.

In the low rpm this motor (arrow)seem a little bit weak,but it is smooth.
And it seems to like it at the hot side arround 266+
while the novarossi perform better at around under 265..
I think the novarossi have a better bottom and middle and thats make it easier for me to drive it in my track with a lot of jumps after the curves and a lot of 180 curves.

When all that is said i still have to see how it wil perform in the track without the brake in shim.Did try it outside my house yesterday and there was some inprovment.
yesterday was also the first day the temp was over 248f.
Did put it a little lean on lsn and a tad richer on msn and leand out the hsn to a steady 266f....and it seemed better than ever before.
If the wether is ok i wil test it on the track tuesday.
But keep in mind that arrow is half the price of nov 4btt

i am using RB 2087+192 i might try out the longer bend to get more bottom.But i dont like to loose the top..