Jhughes7 Posted November 30, 2006 Author Report Share Posted November 30, 2006 I'll be calling you in the next few days to order my new cool head Think I am gonna go with 20cc domes, I wont be advancing the timing for awhile so hopefully 20cc will be fine for 50/50 Quote Link to comment Share on other sites More sharing options...
Washburn Posted November 30, 2006 Report Share Posted November 30, 2006 I'll be calling you in the next few days to order my new cool head Think I am gonna go with 20cc domes, I wont be advancing the timing for awhile so hopefully 20cc will be fine for 50/50 20cc domes will be fine with one gallon of race fuel to 4 of 93. Depending on your compression after you install the 20s you might be able to get away with straight 93. Thats what I have and Im kicking 150 in each and 93 is definatly enough. When I advance my timing that will probably be a diffrent story though. Quote Link to comment Share on other sites More sharing options...
375hp banshees Posted November 30, 2006 Report Share Posted November 30, 2006 (edited) 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 yeah I read that earlier Ithought I was to low & you were high? Wasn't to happy been running 110 (just incase ) for nothing $$ :: $$ I didnt warm it up or clean the filter but, that won't change much so :shrug: also I was just going by what the guy said when I bought it. I told him I wanted all the old parts If he still had them (so I would know what he really did change) but that didn't help going stock to cool head it's any body's guess what he put in there Edited November 30, 2006 by 375hp banshees Quote Link to comment Share on other sites More sharing options...
csrmel Posted November 30, 2006 Report Share Posted November 30, 2006 maybe you compression reader is low, or mine is high. next time we meet up ill bring mine. Quote Link to comment Share on other sites More sharing options...
Jhughes7 Posted December 1, 2006 Author Report Share Posted December 1, 2006 You only run 1 gallon of race gas to 4 gallons of 93 with 20cc domes? I run straight 93 right now stock, A buddy of mine has 19's with no other motor mods and runs straight race gas. Quote Link to comment Share on other sites More sharing options...
dlnoss Posted December 1, 2006 Report Share Posted December 1, 2006 There are lots of variables, among them elevation, porting, compression guages, piston type, etc. One of the things that gets overlooked is the depth that the compression tester threads in to the head/dome. A bunch of the testers have short parts that thread in. If it's shorter than the spark plug threads a false low reading will result. Sometimes just a little more octane is all you need to be on the safe side, like in Washburn's case. I bought 100 octane avgas at a local airport a couple weeks ago for $2.85 per gallon. It has a lot of lead in it and has a very long shelf life compared to pump gas. Quote Link to comment Share on other sites More sharing options...
Washburn Posted December 1, 2006 Report Share Posted December 1, 2006 There are lots of variables, among them elevation, porting, compression guages, piston type, etc. One of the things that gets overlooked is the depth that the compression tester threads in to the head/dome. A bunch of the testers have short parts that thread in. If it's shorter than the spark plug threads a false low reading will result. Sometimes just a little more octane is all you need to be on the safe side, like in Washburn's case. I bought 100 octane avgas at a local airport a couple weeks ago for $2.85 per gallon. It has a lot of lead in it and has a very long shelf life compared to pump gas. Like I said. I plan on being in the high 150s when I install my timing plate and Im going to run 1 gallon of VP110 to 3 gallons of 93. That should be plenty. I dont think its to good of an idea to have above 160-165 in a stock port engine. Thats major wear on your crank first and foremost and your running that race fuel without running as strong as you can run without porting cause porting actualy bumps your compression down due to bigger ports. Im breaking my own rules running a 25% blend in mine. Gotta save up for shocks though while running as strong as I can for the time being untill I do port my engine out. Im definatly looking into that 100LL AV Fuel though. I figured it was like 4 a gallon. As always Good looking out David :thumbsup: Oh and I bought the compression tester with a 14 and 18 mill adapter. The 14 mill is a few screws shorter than the plug and it is very accurate. But the 18mill is longer than the plug and it will hit the top of your piston when you do the compression test. I got mine at Autozone. Quote Link to comment Share on other sites More sharing options...
revedout Posted December 1, 2006 Report Share Posted December 1, 2006 I WOULD LIKE OT THANK EVERY 1 FOR ALL THE INFO IT WAS ALOT OF HELP CUT MY HOME WORK TIME FOR THIS IN HALF THANKS ALOT GUY MAYBE I WILL GET A QUICK VIDEO CLIP OF THE BIKE WHEN ITS DONE POST IT UP Quote Link to comment Share on other sites More sharing options...
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