hey guys figured i would ask but idk if anyone will know for sure since ive had many people look at this even sponsored pro drivers..


my grp has like 3 maybe 3.5 gallons, i broke it in right, i took it easy for the first gallon, then about 1.5 gallons i lost a lot of pinch idk why, it never got over 190. then at the nitro challenge in az i was having problems like no other. temps would not go lower then 220 and i was runnin rich. i had mike thrue look at it and he couldnt even give me an answer. so i checked for air leaks none, took the head off, the piston looked perfect. the weekend after the challenge i went to a p4 plug, my temps dropped back down to 170-190 but im still running rich. im not getting all the power i should be gettin out of the grp but im still making the jumps so its not like its so rich its effecting the performance a lot but i had to have a run at jumps to clear them.

last night was a club race. same story, i tried leaning it out but didnt help it would shoot my temps up to 230 if i leaned it out and it would still be rich.Im only getting 6 min FLAT out of a tank. we had 6 min qualifers and i had to leave the pit at the last sec to make it, i actually ran out of fuel on the second qualifer.

so the main comes, its a 20 min main no big deal i would just pit 3 times. i richened it up because the temps started to drop and i didnt wanna over heat. temps were fine in practice. i knew i was running hot during the main i could just fill it, i had a good amount of smoke but i just had the feeling. i had great power, the power a grp should have. i took it off after the 20 min and temped it and i was at 260.


whats the deal with this grp? i have some pinch left, not where it should be at with the amount of fuel that has gone thru it but there is some. im not having issues with it shutting off, the temp seems to be consistent except for last night.

should i just junk this and get a new engine(not grp) or what...... ive always checked temps last night was the first time its over heated...... it seems like it will run good at 240ish but i dont wanna try it. i dont tune by temp but i know where these engines are supposed to run and this just has me worried.....


and please, i dont wanna hear that these engines run at 225 and not to run them at 160-190. if thats what you gotta say please keep it to your self. ive done my homework on these engines and i dont wanna get into an argument about something like that.

thanks in advance,

Losi Racer