Guess i am trying to run before i can walk and being impatient isnt helping much

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Im am new to racing but had/got a few different RC cars 1/10th and 1/8th, B4 and B44, Tamiya TL01 and TB01, HPI RS4 Rally all electric then a Losi XXX-NT, Traxxas T-MAXX 2.5, Hyper 7 and ST, all being nitro.
Im ranked 20th out of 55 people in the NE regionals, sounds good but some people have only done 1 or 2 race meets so not a really good comparison
Ive ran the Mamba Max ESC and losi 6.5t in my B44 indoor for the 2nd time last friday and my fastest lap was 3 seconds slower than the fastest lap of the night, it was alot easier than using this combo in my B4 but started realising that the motor is to much for me
I was thinking of getting an Orca Q-Spark ESC and 8.5t combo but think i might opt for the 10.5t motor instead and also more and more practice