The lrp drivers so run there motors very hot as they don't seem to mind it at all and are knows as the fastest motor if you can set it up correct just make sure you turn down the speedo a fair bit before you run it or you will cook the motor I tend to run about 15 degree less timing with my lrp x12 On my gm speedo than when I use a gm motor.
I've seen a few people try run the SP motors in 10.5 but seems to struggle to get any reali pace out of them. I personally like the look of the reedy lrp and gm motors.
Lrp for pure performance but get hot so can fade towards the end of a run
GM reliable and hardly slower and run much cooler just don't exceed 80 external temp.
Reedy seems to be inbertween, run abit hotter than gm but not as bad as lrp and hav performance between them both but very smooth.
These would be my personal choices
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