sheerider1026 Posted January 2, 2008 Report Posted January 2, 2008 i have a stock stroke 68mm cub.. it has 20cc domes, 33mm pwk's, vforce, cpi inframes.. i have heard everyone say that they love timing.. it runs good but i think it has a lot more potential.. i am currently running +4 timing.. whats the max i can go on 93 without melting down a piston?? or what do u guys run your timing at(pump gas)?? also what kind of hp should i get out of this motor? Quote
wesw Posted January 2, 2008 Report Posted January 2, 2008 dont jack with it if your still on pump gas. will melt if you crank it up. Quote
dajogejr Posted January 2, 2008 Report Posted January 2, 2008 dont jack with it if your still on pump gas. will melt if you crank it up. I agree 100%. What is your compression at..By the way? Quote
sheerider1026 Posted January 2, 2008 Author Report Posted January 2, 2008 not sure.. i would say around 145.. would have to check.. its been a while.. been riding the other shee mostly(trail riding) Quote
dajogejr Posted January 2, 2008 Report Posted January 2, 2008 Very good idea to check and go from there. You could probably crank up the timing and compression for a noticeable improvement going to race fuel...and since you already have a trail banshee, that would be my route... Quote
sheerider1026 Posted January 2, 2008 Author Report Posted January 2, 2008 so u think +6 or +7 would be too high for pump gas? i have heard they love timing.. does a lot of timing really wake up these motors? Quote
dajogejr Posted January 2, 2008 Report Posted January 2, 2008 Impossible to answer... people that jack up their timing usually know what compression they're already at....and run race fuel. Quote
sheerider1026 Posted January 2, 2008 Author Report Posted January 2, 2008 i have a stock cylinder banshee with 19cc domes and +5 timing running 93.. thats been my combo for years.. never a problem.. i will check the compression on my cub, bump it up 1 degree at a time and keep an eye on my plugs, when i see that i went to high i will back it off one.. hows that sound? Quote
dajogejr Posted January 2, 2008 Report Posted January 2, 2008 Stock cylinder motors are not as prone to detonation as a cub is. Keep an eye on your plugs, and listen to the motor too? I'm going to sound like an ass saying this..but I gotta ask? Why not just get race fuel? And if you knew the answer to your question, why ask? It's as if you already made up your mind what you wanted to do, knew how to do it, and fully planned on carrying it out.... No one in their right mind would tell you to go ahead and just crank the timing. Each bike/setup is different, just as your OEM and cub are different, rider weight, temps, local, altitude, etc.... And even if you had two of the same bikes with the same mods running next to each other, it would still be different... Timing is one piece of many in the puzzle...What is your squish, squish band, squish angle, blaster or banshee piston, etc... Lots of variables.... So...like you said, 1 degree at a time, listen to the motor and check your plugs. But I think you should get some race gas and crank away...personally. Quote
sheerider1026 Posted January 2, 2008 Author Report Posted January 2, 2008 ok race gas it is then.. what kind to use and how much is it?? i can easily get the 110 vp .. if i ran race gas can i go lower on my domes?? what wouldyou suggest my compression and timing to be at with race gas.. i know i am in a different world of tuning with a cub than a stocker.. thanks Quote
dajogejr Posted January 2, 2008 Report Posted January 2, 2008 Well...I can tell you what worked well for me. On my 4 mil cub (and the stroke is important when it comes to dome size and compression...) I ran .045 squish, cleaned up cub, 185PSI, 8 degrees of timing on my plate and my dyna on the most advanced curve (so around 12 degrees to about 5K RPM, then the timing retarded a little from the dyna) I ran 110 race fuel (out of the pump, not VP) and 40:1 Super M or Klotz. It ran good. I drag raced it, duned it...never ran hot or overheated, and I'm a big guy....250 lbs. First check compression to know where you're at. Then, put it on 110 and bump the timing 1 degree at a time...as you said. People told me I was crazy to crank that much timing into my motor...only because they never tried it on their own. You have the right idea...baby steps. Quote
sheerider1026 Posted January 2, 2008 Author Report Posted January 2, 2008 yea thats a lot of timing. what kind of hp u getting outta that motor??i am guessing at wot your timing was around 9 or so? Quote
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