bansheeigo Posted April 14, 2004 Report Share Posted April 14, 2004 I just got engine back from the shop,here's all the info of my shee 1.Wiseco crank with hot rods trued & welded 2.Wiseco pistons .030 bord over,no porting 3.Stock carbs 310 mains 4.Pro-flo flang with k&n filter and outerwear in a stock air box 5.Prodesign coolhead with 20cc domes 6.My elevation is 207 above sea level Out here in California premium gas is 91 octane,i can't get 93 premium out here. My compression is 155 each cylinder but my engine just got back from the shop so i'm thinking that the compression might go up higher once i get it broken in. So my question is,what octane should i use with all these mods? THANKS FOR ALL YOUR HELP. Quote Link to comment Share on other sites More sharing options...
BansheeBrian Posted April 14, 2004 Report Share Posted April 14, 2004 Your comp. will go higher once those rings make themselves comfortable.At 155 do youre heat cycles and do a compression check and keep a sharp eye on your plugs.160 is the magic # for 50/50 race mix. Quote Link to comment Share on other sites More sharing options...
lincster Posted April 14, 2004 Report Share Posted April 14, 2004 I run 50/50 race mix with my 20cc domes. Might be a little overkill, but it doesn't hurt. Are you running with a airbox lid? If you are not, 310 mains might be a little lean for that elevation and being ported. Quote Link to comment Share on other sites More sharing options...
bansheeigo Posted April 14, 2004 Author Report Share Posted April 14, 2004 I have a airbox lid (made out of aircraft billet)on there but its from ALBA and they said its like running without one.I bought this lid back in 99 but on their website i can't find it anywhere,so you can see what i'm talking about. I think its still getting enought air with it on. THANK FOR YOUR REPLAYS. Quote Link to comment Share on other sites More sharing options...
Twitchy Posted April 14, 2004 Report Share Posted April 14, 2004 I run 50/50 race mix with my 20cc domes. Might be a little overkill, but it doesn't hurt.Are you running with a airbox lid? If you are not, 310 mains might be a little lean for that elevation and being ported. Hes not ported, read his original post again a 50/50 mix should be about right, as your compression will go up once the rings get comfy, like stated before. Just keep an eye on your plugs, as you always should on the tempermental banshee's Quote Link to comment Share on other sites More sharing options...
banshee76179 Posted April 15, 2004 Report Share Posted April 15, 2004 I'm at 155, I run 93/ when playing around....maybe some octane booster... 110/serious.... 160 is pretty much the cut-off point on the pump gas! Quote Link to comment Share on other sites More sharing options...
bansheeigo Posted April 15, 2004 Author Report Share Posted April 15, 2004 Now i know that my compression (new top end)will go from 155 to 160 mybe? So can i just run 110 octane to start? Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.