stoopidfast Posted June 5, 2015 Report Share Posted June 5, 2015 2000 Banshee With an HJR agressive race /play port, with +4 timing, 35mm carbs with billet manifold and155 mains, 68 pilots and the needle in the middle groove, I have Shearer exhaust Both cylinders have 140psi and I am 2165' with 20 C riding weather. After I did some repairs and changes to my Banshee because the spark plugs were coming It is real sluggish and wouldn't hit the power band, that was with timing back to 0, 160 mains and 68 pilots and VP110 race fuel. I then switched the mains back to 150 and it was still sluggish, but I hit the power band and it didn't hit as hard as it should. Shoild I go to 48 pilots or should I advance the timing? I don't want the ping to come back or for my spark plugs to come out at high speeds, that can only happen so many times... Any suggestions or direction would be greatly appreciated. Thanks. Quote Link to comment Share on other sites More sharing options...
lil Doobie420 Posted June 5, 2015 Report Share Posted June 5, 2015 140Psi is low for running 110. Wanna be around 155psi and plus 6timing.could be some of your problem on backing out plugs. Quote Link to comment Share on other sites More sharing options...
Sandking Posted June 5, 2015 Report Share Posted June 5, 2015 48-50 pilots , 68 is way too big 2 Quote Link to comment Share on other sites More sharing options...
lil Doobie420 Posted June 5, 2015 Report Share Posted June 5, 2015 Dont explain ur self to him... when u ran that was if the efi set up zilla? Oh wait Quote Link to comment Share on other sites More sharing options...
stoopidfast Posted June 5, 2015 Author Report Share Posted June 5, 2015 I ran 145psi on pump gas with no issues. Even ran 150psi on pump gas. 93AKI. Are you sure you are checking compression correctly? Also the pilots sound too big. I kick the shit out of it WOT until the needle stops moving. Might be a defective comprssion tester. The reason I am running 110 is because i am running 18CC domes. Wouldn't better fuel make it run better no matter what the compression is? Last night I changed the pilots from 68 to 48. I am going to piss off my neighbors this afetrnoon...again and see where I am at now. I may have to adavance mytiming agian. Thanks. Quote Link to comment Share on other sites More sharing options...
stoopidfast Posted June 5, 2015 Author Report Share Posted June 5, 2015 48-50 pilots , 68 is way too big Thanks. Quote Link to comment Share on other sites More sharing options...
lil Doobie420 Posted June 5, 2015 Report Share Posted June 5, 2015 No higher octane fule requires more compression and timing. Elavation and porting also affects the compression.. Quote Link to comment Share on other sites More sharing options...
lil Doobie420 Posted June 5, 2015 Report Share Posted June 5, 2015 Thats what i was thinking zilla Quote Link to comment Share on other sites More sharing options...
stoopidfast Posted June 5, 2015 Author Report Share Posted June 5, 2015 You still have 18cc domes and only getting 140psi? Have you check the squish thickness? http://bansheehq.com/forums/index.php?/topic/174387-how-to-measure-squish-correctly/ What is the port timing? Something isn't right with the setup. Too much porting, or worn out engine. I will have to check the squish. The engine can't be worn out, over the last 7 or / years I might have 30 hours on it. Work isn't so busy this summer, I will defiantely put more time on it. I don't know how to tell port timing? I may have to try a better quality compression tester instead of the Canadian Tire one. Something isn't right, you are right. Kevin from HJR (the man who did the porting) said to keep everything the same as in jets and set the timing at 0 and use straight VP110, . I was using 50/50 and getting a ping and near the end of the ride the left plug came right out and the right plug was finger tight. But, that whole ride it pulled and went like a raped ape... Last night it was just raped. I will do some more testing this afternoon. Thanks again. Quote Link to comment Share on other sites More sharing options...
Strm Trpr Posted June 5, 2015 Report Share Posted June 5, 2015 2k ft ASL w/18cc domes on a fresh stock port motor should yield ~171psi. Quote Link to comment Share on other sites More sharing options...
stoopidfast Posted June 5, 2015 Author Report Share Posted June 5, 2015 All, thanks for all your input. I now have in my possession a Mac Tools compression tester. I will see if the Canadian Tire tester is faulty. Because since the day I built this motor using this tester I have been disappointed with the compression. When I had the cylinders ported I wanted high compression and wanted to rub race fuel. I am going to do the compression test this afternoon. I will post the results. Thanks again to everyone who had useful input! Quote Link to comment Share on other sites More sharing options...
stoopidfast Posted June 5, 2015 Author Report Share Posted June 5, 2015 I just did a compression test with a Mac tester and I got 180psi in both holes. I need to run the race fuel. I am about to try a test run with 48 pilot jets, since the 68's are far too big. Does the timing need to be advanced? Everyone says they should be +4 out of the show room. Should I be stock, +4 or even more? Thanks. Quote Link to comment Share on other sites More sharing options...
Sandking Posted June 5, 2015 Report Share Posted June 5, 2015 Don't worry about timing right now Quote Link to comment Share on other sites More sharing options...
lil Doobie420 Posted June 5, 2015 Report Share Posted June 5, 2015 180psi would be alky compression..ffs Quote Link to comment Share on other sites More sharing options...
sleeper06 Posted June 5, 2015 Report Share Posted June 5, 2015 Don't take the 110 out , static compression means shit 18 cc domes should yield way higher compression ratio than pump can handle, you have another issue my friend while your plugs were backing out you burnt your rings up call up Kevin and see what he thinks stop riding it for now till you talk to him and try another tester Quote Link to comment Share on other sites More sharing options...
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