Jhughes7 Posted November 27, 2006 Report Share Posted November 27, 2006 Was wondering what size domes I would want to run with a coolhead on a banshee at sea level and also have +4 timing and still be good with 50/50 race/pump gas mix? I tried to search it out but it was kinda hard to sift through Quote Link to comment Share on other sites More sharing options...
Bansh-eman Posted November 27, 2006 Report Share Posted November 27, 2006 Was wondering what size domes I would want to run with a coolhead on a banshee at sea level and also have +4 timing and still be good with 50/50 race/pump gas mix? I tried to search it out but it was kinda hard to sift through you should be ok with 20cc domes but the only 100% way to be for sure is a compression test... Quote Link to comment Share on other sites More sharing options...
375hp banshees Posted November 27, 2006 Report Share Posted November 27, 2006 Was wondering what size domes I would want to run with a coolhead on a banshee at sea level and also have +4 timing and still be good with 50/50 race/pump gas mix? I tried to search it out but it was kinda hard to sift through I finaly checked mine w/ 20 cc, +4 @sea level cold 150psi wasn't to happy been running110 just incase & want to go to 50/50 or 93 . there is a chart on here some where to get close but mine was off?? so average hrs & cold so ?? Quote Link to comment Share on other sites More sharing options...
dajogejr Posted November 27, 2006 Report Share Posted November 27, 2006 you should be ok with 20cc domes but the only 100% way to be for sure is a compression test... Ditto... No one will stick their neck out and say with 100% certainty you can do this or that....and be safe. Too many variables...all we can do is point you in the right direction with averages... Quote Link to comment Share on other sites More sharing options...
csrmel Posted November 27, 2006 Report Share Posted November 27, 2006 357hp, isnt 150 kind of low for 20cc domes? im getting 147psi and 148psi with 22cc domes. the noss machine website says with 20cc you should be at around 169psi. These pressures are estimates based on fresh stock bore, piston, porting, and deck height. It is recommended to check your compression after installation. Sea Level 1000' 2000' 3000' 4000' 5000' 18cc 197 178 171 170 165 145 19cc 183 167 160 158 152 137 20cc 169 156 149 146 140 129 21cc 156 145 138 134 128 121 stock 130 125 118 112 106 100 http://www.nossmachine.com/banshee_heads.htm Quote Link to comment Share on other sites More sharing options...
csrmel Posted November 27, 2006 Report Share Posted November 27, 2006 357hp, isnt 150 kind of low for 20cc domes? im getting 147psi and 148psi with 22cc domes. the noss machine website says with 20cc you should be at around 169psi. These pressures are estimates based on fresh stock bore, piston, porting, and deck height. It is recommended to check your compression after installation. Sea Level 1000' 2000' 3000' 4000' 5000' 18cc 197 178 171 170 165 145 19cc 183 167 160 158 152 137 20cc 169 156 149 146 140 129 21cc 156 145 138 134 128 121 stock 130 125 118 112 106 100 http://www.nossmachine.com/banshee_heads.htm Quote Link to comment Share on other sites More sharing options...
Washburn Posted November 28, 2006 Report Share Posted November 28, 2006 Im running the 20ccs and getting 150 at 1089 feet also. Its not as high as it says on the chart but I figured thats what Ide be around. I regret not checking my compression on my stock head but oh well. Ide say its not great but I dident put them on a fresh topend either. Its not rebuild time but it would be higher on a fresh topend. Quote Link to comment Share on other sites More sharing options...
revedout Posted November 29, 2006 Report Share Posted November 29, 2006 well i am a new member and i was thinkin about doing a cool head and i about to order but i need the cc's on the domes to be real close to a 100 % for my bike .... 30 over wisco pistons reeds from vforce pro design boost bottle ( ponitless lol ) and the prodesign air intake kit what would be the best cc to run on this set up nothing to crazy would like ot stay on pump gas Quote Link to comment Share on other sites More sharing options...
Bansh-eman Posted November 29, 2006 Report Share Posted November 29, 2006 well i am a new member and i was thinkin about doing a cool head and i about to order but i need the cc's on the domes to be real close to a 100 % for my bike .... 30 over wisco pistons reeds from vforce pro design boost bottle ( ponitless lol ) and the prodesign air intake kit what would be the best cc to run on this set up nothing to crazy would like ot stay on pump gas what temp and elevation you ride in? Quote Link to comment Share on other sites More sharing options...
dajogejr Posted November 29, 2006 Report Share Posted November 29, 2006 i need the cc's on the domes to be real close to a 100 % for my bike .... What does that mean?? Quote Link to comment Share on other sites More sharing options...
revedout Posted November 30, 2006 Report Share Posted November 30, 2006 what temp and elevation you ride in? i really dont go that high in elevation and i use the bike yr round i mean summer time it could belike 80-90 out side and the winter could be 10-15 outside .... the highest i really go is bear montain other wise alot of queens nj area Quote Link to comment Share on other sites More sharing options...
Bansh-eman Posted November 30, 2006 Report Share Posted November 30, 2006 so average temps around 60-70... and elveation sea level to 1000? you probly get away with 21cc domes and have a little room to play with on the compression... but like i say at least 5 times a week only way to be 100% sure is to do a compression check! Quote Link to comment Share on other sites More sharing options...
dlnoss Posted November 30, 2006 Report Share Posted November 30, 2006 well i am a new member and i was thinkin about doing a cool head and i about to order but i need the cc's on the domes to be real close to a 100 % for my bike .... 30 over wisco pistons reeds from vforce pro design boost bottle ( ponitless lol ) and the prodesign air intake kit what would be the best cc to run on this set up nothing to crazy would like ot stay on pump gas If your timing is stock and you run premium pump gas, 21cc should be fine. Quote Link to comment Share on other sites More sharing options...
revedout Posted November 30, 2006 Report Share Posted November 30, 2006 thank you guys for all the info and the help .... 1 last question i heard u need to change the head studs with the cool head because the stock head bolts are not long enought ... true or not ? Quote Link to comment Share on other sites More sharing options...
Bansh-eman Posted November 30, 2006 Report Share Posted November 30, 2006 thank you guys for all the info and the help .... 1 last question i heard u need to change the head studs with the cool head because the stock head bolts are not long enought ... true or not ? for a pro design head this is true but a noss head you dont have too..and both take the same domes... Quote Link to comment Share on other sites More sharing options...
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