traxx2003 Posted October 17, 2011 Report Share Posted October 17, 2011 I'm looking to upgrade to a Banshee Cool Head, Was wondering what dome size should I get? I would like to be able to up the compression to about 150+-. If I can reach 150+- for compression, Will it still be safe to run pump gas? Here is my current setup: The Motor inside is factory (current compression is @ 110psi both sides), but I've done some mods: - VForce 3 Reeds - Timing plate= set @ +5 degrees - Toomey T5 pipes - TORS removal mod -Jetting: 27.5 pilot jets, 270 main jets Quote Link to comment Share on other sites More sharing options...
06specialedition Posted October 17, 2011 Report Share Posted October 17, 2011 I'm looking to upgrade to a Banshee Cool Head, Was wondering what dome size should I get? I would like to be able to up the compression to about 150+-. If I can reach 150+- for compression, Will it still be safe to run pump gas? Here is my current setup: The Motor inside is factory (current compression is @ 110psi both sides), but I've done some mods: - VForce 3 Reeds - Timing plate= set @ +5 degrees - Toomey T5 pipes - TORS removal mod -Jetting: 27.5 pilot jets, 270 main jets I'm no race fuel expert, but I've always been told 165-170psi needs race fuel. Whats your elevation? That will factor in what dome size to get. Quote Link to comment Share on other sites More sharing options...
LS3 Machine Posted October 17, 2011 Report Share Posted October 17, 2011 I'm looking to upgrade to a Banshee Cool Head, Was wondering what dome size should I get? I would like to be able to up the compression to about 150+-. If I can reach 150+- for compression, Will it still be safe to run pump gas? Here is my current setup: The Motor inside is factory (current compression is @ 110psi both sides), but I've done some mods: - VForce 3 Reeds - Timing plate= set @ +5 degrees - Toomey T5 pipes - TORS removal mod -Jetting: 27.5 pilot jets, 270 main jets 21 or 22cc domes seem to be the size most folks go with. Do you have 93 octane available? If 93, I would go 21cc, for 91 I would go 22cc. You already are at 5 degrees timing. The increased compression really make the banshee rip, I have just about the same mods plus PWK 28s, and boy does shee rip. I mostly have traction issues, so I see no reason to add power from where I am for now. Quote Link to comment Share on other sites More sharing options...
Dicklez Posted October 17, 2011 Report Share Posted October 17, 2011 Im playin around with the same setup. You can mix in pump gas with race fuel to cut cost. The lower cc dome the hotter your engine will run depending on your riding style with race gas. Im going +4 with 19cc domes mixing race with pump. Didnt check compression yet but should be above 150. I used to just put in any old gas but now iam playing around with higher compressions. Iam no expert but this is what iam trying. Quote Link to comment Share on other sites More sharing options...
traxx2003 Posted October 17, 2011 Author Report Share Posted October 17, 2011 (edited) Im playin around with the same setup. You can mix in pump gas with race fuel to cut cost. The lower cc dome the hotter your engine will run depending on your riding style with race gas. Im going +4 with 19cc domes mixing race with pump. Didnt check compression yet but should be above 150. I used to just put in any old gas but now iam playing around with higher compressions. Iam no expert but this is what iam trying. Thank you all for your replies; I leave at an elevation of 2300-2400 feet. My riding is basically trail riding/ desert riding. Due to the terrain conditions where I mostly ride (California City Ca Desert), I do not spend a lot of time WOT. Basically I'm looking for low end low rpm extra power.Although I do have access to 100 octane fuel ($6:00 + - gal.), I can only get 91 pump gas here in Ca. Thanks again!!! SO what brand of aftermarket head should I go with? Edited October 17, 2011 by traxx2003 Quote Link to comment Share on other sites More sharing options...
Coupelx Posted October 17, 2011 Report Share Posted October 17, 2011 save the money you spend on a coolhead for a port job. better bang for your buck. Quote Link to comment Share on other sites More sharing options...
jbooker82 Posted October 22, 2011 Report Share Posted October 22, 2011 save the money you spend on a coolhead for a port job. better bang for your buck. For the ultimate budget beater, mod your stock timing plate, shave the stock head, and port the cylinders. Quote Link to comment Share on other sites More sharing options...
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