XLT 4 motor

[yj-7]

Hi all,
I am new to the forum and have some questions for all of you that are knowledgable about 1/8 buggy conversions. I am converting a Jammin X1 CR Pro and will be using the MM controller and 4 cell 6000mha pack from maxamps. I am a machinist and will be making my own motor mount /diff bulk and battery tray. My questions come in on the motor. I have done alot of reading on here and had decided to go with a Fiego c8XL motor and then I called fine design to find out what the kv on his 8XL motor was and he tells me that I will not be happy with an 8XL, says it wont stay cool and that he recomends an XLT4 which he says was made for 1/8 scale, but he would not give me the kv for the motor. He said that with that motor and 13/46 gearing that I would see a true 42 mph. This buggy will be used for club racing. Any info you all have on Fine design and what motor choice you think I should make would be helpful, Thanks, Jeff