I've been racing R/C for 16 years but am a Nitro Newbie. I've got a gallon and a half on my GRP with virtually no problems. Put in a P3 plug and it has been great. Starts great no flame outs. I've flamed out a couple times by not keeping it cleared out enough, but I've yet to flame out on the track(and being new to nitro and off-road, I crash alot)(Knock wood)

As a side note, the only thing I've noticed with my current tune. When the motor is cold(not up to full temp) It runs fine at low speed but won't come up to "full song" on the straight, Once the motor is up to tempature(been coming off 200-210 in 90degree heat + Iowa Humidity) it is fine. Motor has a small but visible smoke stream at all times.

To me, it would seem that the HSN is a little on the rich side, but I don't really want to see my motor temps go any higher.

anyone have any thoughts on this.