2004LEBanshee Posted March 1, 2004 Report Share Posted March 1, 2004 With my mods what do you guys think will it be ok till the top end goes? I know there is know way to tell for sure. Also how can I help to make it last longer. I asume not dumping the clutch when dragging is a way, but does that matter if it's on dirt being that the tires spin? Just dont want to take it all apart to get it welded. This lazyness is probably going to burn me in the end. What do you think? I think my comp is around 145. Quote Link to comment Share on other sites More sharing options...
Toomey Banshee Posted March 1, 2004 Report Share Posted March 1, 2004 I would get a firm handle on what your compression is. Also with the timing advance AND the milled head I would at the very least run 50/50 race/premium. Quote Link to comment Share on other sites More sharing options...
boonman Posted March 1, 2004 Report Share Posted March 1, 2004 You need to weld it. They are known to seperate. Once it seperates, it can also twist, which would throw timing off, and you may risk detonation. That could take the crank bearings, and the top end out.... That will piss you off.... Quote Link to comment Share on other sites More sharing options...
ledofthezep Posted March 1, 2004 Report Share Posted March 1, 2004 That will piss you off.... But will give you a reason to go bigger & better! I'm still running the stock crank & topend. Could probably use a new topend just for shits, but shee's still got kick-arse compression & runs just fine. "Always look on the bright side of life..."(Monty Python anyone?) Quote Link to comment Share on other sites More sharing options...
2004LEBanshee Posted March 2, 2004 Author Report Share Posted March 2, 2004 I was at 116 stock then I am almost positive it is 145 now. Why would I have to run mix. I thought that was at 160 anyway. Is that incase the crank starts to seperate? How can I tell if it is detonating? Ive also rode about 4 times since this was all done. So wouldn't it have blown up by now. Quote Link to comment Share on other sites More sharing options...
Toomey Banshee Posted March 2, 2004 Report Share Posted March 2, 2004 Have you actually checked the compression? If not now would be a good time to. As far as the 160 mark you are absolutely correct, but the timing advance coupled with your increase in compression will increase your chances of detonating over just the shaved head, so to be on the safe side, I would run the mix. As far as waiting till the top end goes before you weld the crank I dont think that is a bad idea. How long is on the top end? Still running good? Again, take a compression test now and check it regularly and when the compression starts to drop rip her down and do the whole thing, port/polish, pistons and crank. Quote Link to comment Share on other sites More sharing options...
2004LEBanshee Posted March 2, 2004 Author Report Share Posted March 2, 2004 Have you actually checked the compression? If not now would be a good time to. As far as the 160 mark you are absolutely correct, but the timing advance coupled with your increase in compression will increase your chances of detonating over just the shaved head, so to be on the safe side, I would run the mix. As far as waiting till the top end goes before you weld the crank I dont think that is a bad idea. How long is on the top end? Still running good? Again, take a compression test now and check it regularly and when the compression starts to drop rip her down and do the whole thing, port/polish, pistons and crank. I am confused on the adding of the timing advance to the increased compression. For example lets say there are two banshee here. The Only mod to banshee (1) was 20cc domes and that brought it's comp to around 150-155. And shee (2) has a +4 timing, Milled head, and a comp of 145. I believe you are saying that the first one is ok on pump because it is below 160 and the second one should run 50/50 because it is more likely to experiance detonation because of the timing advance? Is that correct? If not then If I do a comp. test and I am at, lets say 150 I am ok on 93 premium gas as long as its not 160. Which I am sure I am not at. If I am to run 50/50 the only local place sells Cam2 which is 110 I believe. I heard people mention that the run something that is around 100 to mix with the 93. So Should I still mix 50/50 with the 110 or mix less like 25:75. One more question can I hear detonation and what does it sound like? Also I assume it dosent mess with my jetting? Only my wallet. As for my top end, it is only 6 months old as is the whole bike. Thanks for the help guys I appreciate it. Quote Link to comment Share on other sites More sharing options...
2004LEBanshee Posted March 3, 2004 Author Report Share Posted March 3, 2004 ok just checked compression it's 140 on both so should i still run 50/50? Quote Link to comment Share on other sites More sharing options...
boonman Posted March 3, 2004 Report Share Posted March 3, 2004 I would not be concerned with detonation in your motor. You should have no problem... Even with the timing advance. There are other factors involved here, however, I have done PLENTY eough cylinder heads to know this. .030" off and even with the timing advance isn't a problem. Unless you are at or below sea level. THen, you may have to watch things a bit more closely. To see if your detonating, read BebBB's jetting FAQ, and it has a section about reading the plugs.... Detonation will show up as tiny specs of aluminum on the porcelain. You should also hear the engine ping if it is detonating... 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.