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tharrison365
10-03-2012, 07:04 AM
I have saw several engines lately with the cool heads but do not know what the advantages are. What exataly do they do different then stock heads. Also what are the advantages thanks.
C-LEIGH RACING
10-03-2012, 07:28 AM
Cool head is made different from a stock TRX head.
#1
It will hold more coolant by how it is machined on the inside, so will cool far better than a stock TRX head.
#2
The inner dome is removable so that you can custom the amount compression your wanting or replace just that part should it get damaged.
#3
How the outside surface of the dome is machined, it promotes betting cooling as well.
#4
The Cool head design, you can get it machined so that it would use a head gasket for sealing or either with o ring grooves & use o rings.
#5
The whole head, outer shell & inner dome are machined out of billet aluminum, not cast, & the areas where the head studs go through are a bit thicker than the stock TRX head, so the cool head will hold its shape much more than the stock TRX head, which is another + to add to all the other features.
Neil
tharrison365
10-03-2012, 08:33 AM
Neil would you recemend it for my 310 kit. It has v force 3 reeds and a 38 airstriker. I use it for xc racing. thanks
C-LEIGH RACING
10-03-2012, 10:05 AM
Yes, specially the one with o ring sealing, because the sleeved OEM cylinder to 310 is the hardest to keep the head gasket area sealed.

ESR is back producing their cool heads for the OEM TRX cylinders.
Neil
tharrison365
10-03-2012, 10:34 AM
Ok ill get it. Also its a aftermarket cylinder i picked up from marty at hutson motorsports. I got a whole engine off him that hes in process of buildin. Which dome would i need? Thanks
C-LEIGH RACING
10-03-2012, 04:49 PM
Ok, now you say it is an aftermarket cylinder, which is it ?, CT Racing, ESR, LRD, Duncan PC2000 ???, because it makes a difference which cylinder it is.
Neil
tharrison365
10-03-2012, 07:58 PM
Its a curtis sparks
etccb
10-04-2012, 06:26 AM
Curtis never made a cyl just made mods to stock and other's cyl. Is there any way that you could post a photo of the cyl in question? That would help neil answer your question.
C-LEIGH RACING
10-04-2012, 10:10 AM
Curtis had a few Pro-x set ups.
His bag was the OEM jug & then everybody that had one in their hands trying to figure out what he did to them.
Neil
trx250r1
10-04-2012, 08:28 PM
Same cylinder I looked at.