timming and low end

[brad ellington]

ok i was told if you up the timming to +4or+7 and up the comp to less say 18cc domes and fun race gas that is would help with the low end power just wanted to know if it would work thanks

[MinnZilla]

I have heard that running high compression (ie 18cc domes) will improve low end although I thought advancing the timing only helps top end and raise the max RPM your motor will reach. But I am not an expert and would love to hear from others.

[brad ellington]

idk but i think if you lower your timming it give more top end and add timming more bottom end.
i was think of running anywhere from +4 to +7 on timming and something around a 19 to 18cc dome on a stock motor with pipes (t5 or cpi or grr) and some light porting this is just a trail bike NOT a race bike so i need a little more low end yes i know cpi and grr are a top end pipe but i have a set of each.
so would the timming and compression and 35mm carbs with light port or no porting work for just a good trail set you i live in ohio and ride at bigrock in ky thanks for the help

[flotek]

for a 350 on gas increasing your igniiton timing on a banshee will yeild approx 3 more hp across the board and improve the torque also ,increasing static compression by utilizing 18cc domes will vastly improve lowend torque,the 2 mods will work great but be mindful you will probably need to run atleast 100 octane . too much timing and compression can hurt topend rpm and performance stick with +4 or +5 on the timing plate and 18 or 19cc domes also a lighter flywheel wil l add lowned snap off idle that your looking for , get some all around pipes like fattys, t5 ,paul turner, or dmc . other good ideas would be vforce3 reeds and a good k&n filter setup to let it all breathe . stock carbs would work best for you ,as hard as it is to belive they are decent carbs for what you want even o na ported bike ...those 35mm will only narrow the powerband and reduce lowend torque and create hesatation beofre it comes o nthe pipe "so to speak .the port layout makes a huge difference too ,ive found pitching the rear transfers wakes the lowend -mid up big time ,just about anybody can make a banshee scream and hit hardo nthe pipe ,making one wit h a smooth linear poweful pull with both good lowend snap and alot of topend rpm takes alot of time under the knife and expermenting ... also the right bolt ons .

[swrbansheeboy]

i agree with eviltwin. keep in mind that a lightened flywheel has less mass so it allows the motor to rev up faster also it has less mass so it will rev down faster when it gets bogged. i think for a trail bike 35 mill carbs are way too big. one of our bikes is a 350, 18cc domes, t-5's, 28 mill pwk's, 13/43 gearing, no timing advance and no port work... this bike runs 10 paddle extreems and i know your probably riding dirt but sand drags a motor down way more than dirt riding. i can take this bike out sidehilling and bog the motor down so much it sounds like a 4-poke and wick the throttle and pull out of anything im on with no hesitation. i cant say that for most the bikes i run around with that have all the mods done. sometimes less is more depending on what your desired end result is. i would reccomend the t-5's, look at some smaller carbs, 4 degree timing advance, and a cool head so you can swap out the domes if you want to mess with the compression. one more thing about the 35's, unless your motor is built to flow alot of fuel/air then your gonna have a hell of a time tuning them. alot of guys just assume they can put cpi's on there motor and get gains but there engine wont flow enough to make the pipes work, same thing with carbs. carbs capable of flowing tons of fuel but a motor incapable of pulling enough air to make them preform like they were designed. if your looking to run cpi's and 35's then be prepared to get a big ass port job and have a bike thats good for drag racing and is a light switch...

[brad ellington]

ok thanks.
i just have a set a 35 but they are for my a&s cub so i was just asking about them but i will get a set of fmf or t5 for my other banshee and maybe a flywheele if needed i will use the stock carb is there anything i need to do the the stock carbs other than jets thanks. Is 18cc domes to much shoild i go to a 19 or 20 cc

[swrbansheeboy]

just re-jet the carbs and i would go with the 18's. just make sure to check your compression cause your probably going to want to run at least a 50/50 mix of race fuel and super with the timing advanced and 18 cc domes.