james7711 Posted November 29, 2011 Report Share Posted November 29, 2011 whats the difference between the pro design cool head and the the stock head does it make a hp difference Quote Link to comment Share on other sites More sharing options...
Dicklez Posted November 29, 2011 Report Share Posted November 29, 2011 whats the difference between the pro design cool head and the the stock head does it make a hp difference Again use the search function. Cool heads give you the choice of running different domes sizes Quote Link to comment Share on other sites More sharing options...
So Cal Suspension Posted November 29, 2011 Report Share Posted November 29, 2011 whats the difference between the pro design cool head and the the stock head does it make a hp difference Cool heads allow you to change the dome size, changing your compression. Quote Link to comment Share on other sites More sharing options...
james7711 Posted November 29, 2011 Author Report Share Posted November 29, 2011 Cool heads allow you to change the dome size, changing your compression. thanks and i have the cool heads i just dont know what dome size i have in mine all i know is i have 150 psi in each cylinder with superstocks and stock stroke crank Quote Link to comment Share on other sites More sharing options...
Glenyboy Posted November 29, 2011 Report Share Posted November 29, 2011 There's a lot of other things to consider with domes, like elevation, other engine mods, grade of fuel Quote Link to comment Share on other sites More sharing options...
donkeypuncher Posted November 29, 2011 Report Share Posted November 29, 2011 thanks and i have the cool heads i just dont know what dome size i have in mine all i know is i have 150 psi in each cylinder with superstocks and stock stroke crank They only way to know what size domes are in there is by removing your head. On the side of the domes will be a number, that number represents the size. More then likely you have somewhere between 19-21cc domes. Quote Link to comment Share on other sites More sharing options...
Larry's Shee Posted November 29, 2011 Report Share Posted November 29, 2011 If it ain't broke don't fix it. Run premium , be good to go. You need 15 posts before you can use shout, but not to use search function. Quote Link to comment Share on other sites More sharing options...
james7711 Posted November 29, 2011 Author Report Share Posted November 29, 2011 If it ain't broke don't fix it. Run premium , be good to go. You need 15 posts before you can use shout, but not to use search function. i run supreme 91 octane with 32:1 mix ratio and i use ipone synthetic 2 stroke oil and a little bit of octane booster. my plugs come out golden every time Quote Link to comment Share on other sites More sharing options...
Dicklez Posted November 29, 2011 Report Share Posted November 29, 2011 Octane boost is bullshit. Quote Link to comment Share on other sites More sharing options...
willaduncan Posted November 29, 2011 Report Share Posted November 29, 2011 prodesign makes the vitos hemidome II cool head correct? are the coolheads of good quality mine was leaking from the stud so i pulled it to check and also to a rebuild the leak was due to a pinched oring but im just wanting to know if they are pretty good heads or should I get something else??? the cylinders just got sent off for a hardcore mx port and bore by HJR just incase anyone needed to know to help me determine what coolhead I should go or stick with thanks! Quote Link to comment Share on other sites More sharing options...
james7711 Posted November 30, 2011 Author Report Share Posted November 30, 2011 prodesign makes the vitos hemidome II cool head correct? are the coolheads of good quality mine was leaking from the stud so i pulled it to check and also to a rebuild the leak was due to a pinched oring but im just wanting to know if they are pretty good heads or should I get something else??? the cylinders just got sent off for a hardcore mx port and bore by HJR just incase anyone needed to know to help me determine what coolhead I should go or stick with thanks! so far i haven't had a problem so id say there pretty good it might of pinched the oring by torquing it all at once instead of doing it in litter steps or it might of went out of place when it was put together and i noticed a big deference in psi from the stock head i went from 120 psi to 150 and what domes u chose is all in what u want or ur combination in parts Quote Link to comment Share on other sites More sharing options...
willaduncan Posted November 30, 2011 Report Share Posted November 30, 2011 so far i haven't had a problem so id say there pretty good it might of pinched the oring by torquing it all at once instead of doing it in litter steps or it might of went out of place when it was put together and i noticed a big deference in psi from the stock head i went from 120 psi to 150 and what domes u chose is all in what u want or ur combination in parts So im assuming you have the vitos coolhead as well? yea I know what domes I need to run and yes the outer oring for the head not the dome was pinched. Do you run the stud orings with your head? the guy that put mine on didnt Quote Link to comment Share on other sites More sharing options...
james7711 Posted November 30, 2011 Author Report Share Posted November 30, 2011 So im assuming you have the vitos coolhead as well? yea I know what domes I need to run and yes the outer oring for the head not the dome was pinched. Do you run the stud orings with your head? the guy that put mine on didnt i have a prodesign cool head and yes im running all the orings that came with it Quote Link to comment Share on other sites More sharing options...
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