Heatsink/Head Differences??

[Mickstix]

Hey once again!! So I got this replacement engine, and it's got a slightly different head on it.. Can ya'll see any reason why I should go with the smaller/new head?? Only real difference I can see is it has one less row of fins and no anodizing on the bottom, where it contacts the button.. Also, are there any preformance differences in different heads?? Not necessarily these 2, but I see lots of different shapes and sizes as well as colors, when looking at all the nitro motors on the market.. Is one design better than another? Thanks for any info you can offer on head designs and thanks for your opinion of which of these I should use on my 1/10 scale 4wd Buggy..

 

[olds97_lss]

If it were me, I'd lightly sand the old head where you see silver on the new head and stick with it.

XTM changed their head designs quite a bit on their XTM24.7 as well. I have one of the original small heads that I run in the winter and a newer larger head I would run in the summer if I ran that engine in the summer. They had another head in between.

Old fat head (the "tween" head):

Old head:

Newer large head:

Looks like they changed them pretty similarly to yours.

 

[Mickstix]

OK Thanks! That's kinda what I was thinkin! (That the smaller head would make a nice cold weather head) Thanks again Olds!!

 

[Scrogg]

Very true guys, BUT the smaller head has no annodizing on the mating point with the head button. This aids in heat transfer drastically.

 

[olds97_lss]

Yeah, that's why I suggested sanding it. Should help with the heat transfer. Seems kind of stupid that they did that.

 

[Mickstix]

Yea, I took a small piece of sandpaper to it.. Cleaned it right up! They probably found it was less expensive to use a smaller head and clean up the anodizing, than what they were doing before.. lol..