LESS BACK PRESSURE ON A 4 STROKE IS BEST, for the simple headed think they know it all mechanics YOU ARE WRONG! Why then do we put headers on our race cars and have header dumps? 2 strokes need tuned back pressure
Sounds like you guys need to do some research on back pressure. No pipe will not hurt the engine granted it's tuned properly without a pipe(dunno why you would want to do that). Back pressure(BP).. depends on your intended use of an engine. High reving engines want next to no BP, hot gasses flow easier. Low reving engines, usualy colder, benifit from BP at lower RPM, The exhaust is small enough to where the gases flow constant and consistantly.
running with out a head pipe will make you run lean bc the lees backpressure more air is goin through you will have less low end power but better top end power you at least want a straight pipe to keep dirt and water out mainly water but with out the head pipe put your hand in fort of the air coming out it is all over the place with pipe it funnels out and gose through the still air better
kinda need the pipe dude!!! at least a foot long or your valves are toast! BIG MONEY REPAIR! ive burnt out valves ant thoes sons of bitches are tough to repace in these 400s. been a while since then i dunno if its any easier now. might as well stay safe. put the pipe back on and you will be able to ride it for a long time. nice video anyhow.
good luck burning out your valves if u run anything with out a pipe it ruins all the back pressure and burns up ur valves well i guess try it and find out what kind of a project that is but im only 15 what would i know
wow... four strokes DO NEED backpressure!!! But if you jet them right you can subside the damages. However you can burn the valves up from a straight pipe, I know I did it. Floated 2 just yesterday actually from running a straight pipe on a old junk atv.. if you have too short of a pipe you can cause the engine to cool too quickly and damage other top end parts too.
i gotta say thats the best thing for it....nat put the fuckin exhaust on or else you will lean ur engine out pretty quickly but yes it does sound pretty cool
no im talking about getting the motor warmed up and then letting that nice cold air right back into the cylinder if the exhaust valve is open...u can warp a valve
he is not going to blow it up...depending on the length of the open pipe...Warp the valves. getting hot then letting cold air right up an open pipe will do the truck
Why are you rating this down... this guy is absolutely correct... the cold air coming in too quicky will damage your engine!! Believe it or not i dont care.. try and find out for yourself.
LESS BACK PRESSURE ON A 4 STROKE IS BEST, for the simple headed think they know it all mechanics YOU ARE WRONG! Why then do we put headers on our race cars and have header dumps? 2 strokes need tuned back pressure
WesternMilita 8 months ago
im gonna laugh when u burn up the rings
merls95 1 year ago
guys u could bolth be right but seeing what he has in his garage i think they got it covered
bobhan100 1 year ago
Sounds like you guys need to do some research on back pressure. No pipe will not hurt the engine granted it's tuned properly without a pipe(dunno why you would want to do that). Back pressure(BP).. depends on your intended use of an engine. High reving engines want next to no BP, hot gasses flow easier. Low reving engines, usualy colder, benifit from BP at lower RPM, The exhaust is small enough to where the gases flow constant and consistantly.
Damn this character limit - Go research it
RubberSalt 1 year ago
even though no pipe will fuck it up you would be best tomake a 30 dollar straight pipe system then a1000$ motor
ghostshot1004 1 year ago
running with out a head pipe will make you run lean bc the lees backpressure more air is goin through you will have less low end power but better top end power you at least want a straight pipe to keep dirt and water out mainly water but with out the head pipe put your hand in fort of the air coming out it is all over the place with pipe it funnels out and gose through the still air better
beastyballbros 1 year ago
actually there is more back prssure with no pipe because there is no flow. You wont realy burn anything up.
beastyballbros 2 years ago
@beastyballbros haha how do u figure that, more back pressure, there is ALOT more flow
biro753 1 year ago
kinda need the pipe dude!!! at least a foot long or your valves are toast! BIG MONEY REPAIR! ive burnt out valves ant thoes sons of bitches are tough to repace in these 400s. been a while since then i dunno if its any easier now. might as well stay safe. put the pipe back on and you will be able to ride it for a long time. nice video anyhow.
highdeserthater 2 years ago
good luck burning out your valves if u run anything with out a pipe it ruins all the back pressure and burns up ur valves well i guess try it and find out what kind of a project that is but im only 15 what would i know
donahueracing 2 years ago
u took out the baffles that happend to mine did sound like a v 8
milner614 3 years ago
for those of u who think this is vary loud.... well ur wrong it is just the noise echoing of the walls
gymansticsman35 3 years ago
sounds better like that leave it that way lol
fordman500 3 years ago
wow... four strokes DO NEED backpressure!!! But if you jet them right you can subside the damages. However you can burn the valves up from a straight pipe, I know I did it. Floated 2 just yesterday actually from running a straight pipe on a old junk atv.. if you have too short of a pipe you can cause the engine to cool too quickly and damage other top end parts too.
BurningTirez 3 years ago
your a dumb mother fucker they BOTH need back pressure.... have fun fucking your shit up....
watt080 3 years ago
lmfao go back to school you idoit. 4 stroke needs back pressure or your going to warp or burn out your exaust valve. ive done it many times before
hondakodiak 3 years ago
no it wont you stupid mother fucker. it needs back pressure. go back to school you fucking amature
hondakodiak 4 years ago
yes it does fucking dumbass you dont know shit get off this site!
hondakodiak 4 years ago
its not so dangerous on a 4 stroke fucker
mickv20 4 years ago
i gotta say thats the best thing for it....nat put the fuckin exhaust on or else you will lean ur engine out pretty quickly but yes it does sound pretty cool
dillweed17 4 years ago 2
that bitch sounds fuckin sweet!!
FASTXCRRacer 4 years ago
no im talking about getting the motor warmed up and then letting that nice cold air right back into the cylinder if the exhaust valve is open...u can warp a valve
Sprchrged04 4 years ago
Your an idiot!
tonyinfinity 4 years ago
if he wants to take off his exaust and blow up his nice atv...let him
1allen111 4 years ago
he is not going to blow it up...depending on the length of the open pipe...Warp the valves. getting hot then letting cold air right up an open pipe will do the truck
Sprchrged04 4 years ago
dont you mean trick lol
tobin440 4 years ago
u know what i mean...dumbass
Sprchrged04 4 years ago
Why are you rating this down... this guy is absolutely correct... the cold air coming in too quicky will damage your engine!! Believe it or not i dont care.. try and find out for yourself.
BurningTirez 3 years ago 8