1Likes"the tuning bible"
05-08-2010, 09:39 PM
#211
guys i need your input here we went for practice yesterday & everything was fine new clutch shoe,spring & cleaned filter , except the jx motor flame-out (half-tank) ,so i tried to richen the top (hsn) & fill it up again after some passes same thing when it rich to half-tank it will flame-out ,i tried new p3 plug same thing,if not half-tank it will flame-out on 1/4 mark
go to the ebmods js thread , there are a number of experts on that engine in there
Last edited by houston; 05-08-2010 at 10:02 PM.
05-08-2010, 09:58 PM
#212
i just change the tank recently ,i would say 10 tanks already
05-09-2010, 12:13 AM
#213
Very Helpful
05-09-2010, 06:52 PM
#214
Tuning help
I just chased a tune all day. I put a new carb on a good running OS v-spec, old one's slide was sticking. It ran great on the starter box, started right up, idled good, good power etc. until it was put on the track. At best it would run great on the straight, i'd coast through the sweeper, then when I got back on it, it gurgled like it was loading up. Re-tuned and it would bog and try to die at half throttle, a couple times it backfired (again it was perfect on the bench). Tried numerous time, same results.
It seemed like it only acted up under load. Other suggested an air leak, it didn't seem like an air leak to me but I was willing to try anything, so I changed fuel lines, tightened carb, pipe etc.
I thought maybe a clutch problem but just pulled it apart and it seems good. Is this maybe a mechanical problem seeing it only happens with the cars wheels on the track?
Any ideas???
It seemed like it only acted up under load. Other suggested an air leak, it didn't seem like an air leak to me but I was willing to try anything, so I changed fuel lines, tightened carb, pipe etc.
I thought maybe a clutch problem but just pulled it apart and it seems good. Is this maybe a mechanical problem seeing it only happens with the cars wheels on the track?
Any ideas???
05-11-2010, 04:07 PM
#215
I just chased a tune all day. I put a new carb on a good running OS v-spec, old one's slide was sticking. It ran great on the starter box, started right up, idled good, good power etc. until it was put on the track. At best it would run great on the straight, i'd coast through the sweeper, then when I got back on it, it gurgled like it was loading up. Re-tuned and it would bog and try to die at half throttle, a couple times it backfired (again it was perfect on the bench). Tried numerous time, same results.
It seemed like it only acted up under load. Other suggested an air leak, it didn't seem like an air leak to me but I was willing to try anything, so I changed fuel lines, tightened carb, pipe etc.
I thought maybe a clutch problem but just pulled it apart and it seems good. Is this maybe a mechanical problem seeing it only happens with the cars wheels on the track?
Any ideas???
It seemed like it only acted up under load. Other suggested an air leak, it didn't seem like an air leak to me but I was willing to try anything, so I changed fuel lines, tightened carb, pipe etc.
I thought maybe a clutch problem but just pulled it apart and it seems good. Is this maybe a mechanical problem seeing it only happens with the cars wheels on the track?
Any ideas???
05-13-2010, 04:01 AM
#216
quick question..
i'm running in an engine axe cobra x1 evo .21
i've done about 2L through the engine now and it's starting to get some serious top end speed.
when tuning this engine i have found myself having to richen the mixture to get a better top end without lean bog (which i have experienced when running this engine in). so i richened the HSN by upto 1/4 turn..
does this seam right with a new engine? is this just the engine wearing in and finding new RPM?
also. when applying open throttle, backing off, then applying open throttle the engine would surge slightly on the 2nd take of... once again, is this just a result of a too rich mixture... both HSN and LSN, and/or the engine wearing in?
at all times the engine has blown blue smoke. with the spit test . spit evaporated after about 6 - 8 secs.
i'm running in an engine axe cobra x1 evo .21
i've done about 2L through the engine now and it's starting to get some serious top end speed.
when tuning this engine i have found myself having to richen the mixture to get a better top end without lean bog (which i have experienced when running this engine in). so i richened the HSN by upto 1/4 turn..
does this seam right with a new engine? is this just the engine wearing in and finding new RPM?
also. when applying open throttle, backing off, then applying open throttle the engine would surge slightly on the 2nd take of... once again, is this just a result of a too rich mixture... both HSN and LSN, and/or the engine wearing in?
at all times the engine has blown blue smoke. with the spit test . spit evaporated after about 6 - 8 secs.
05-15-2010, 02:45 PM
#217
Hi guys,
i'm a bit of an amateur and have accidently adjusted my LSN on my OS speed while adjusting the throttle ballstud position!
As it runs now it's fine once it's off and running, it doesn't stall quickly when sat idling but under initial acceleration it sits for 1-2 seconds before clearing out and accelerating with initially a lot of blue smoke. The HSN is definitely bob on so it is only the LSN that needs adjusting, does it sound too rich or too lean?
i'm a bit of an amateur and have accidently adjusted my LSN on my OS speed while adjusting the throttle ballstud position!
As it runs now it's fine once it's off and running, it doesn't stall quickly when sat idling but under initial acceleration it sits for 1-2 seconds before clearing out and accelerating with initially a lot of blue smoke. The HSN is definitely bob on so it is only the LSN that needs adjusting, does it sound too rich or too lean?
05-16-2010, 05:32 AM
#218
Tech Elite
iTrader: (45)
Join Date: Jun 2003
Location: Somewhere in Penang Island, Malaysia
Posts: 3,495
Trader Rating: 45 (98%+)
Hi guys,
i'm a bit of an amateur and have accidently adjusted my LSN on my OS speed while adjusting the throttle ballstud position!
As it runs now it's fine once it's off and running, it doesn't stall quickly when sat idling but under initial acceleration it sits for 1-2 seconds before clearing out and accelerating with initially a lot of blue smoke. The HSN is definitely bob on so it is only the LSN that needs adjusting, does it sound too rich or too lean?
i'm a bit of an amateur and have accidently adjusted my LSN on my OS speed while adjusting the throttle ballstud position!
As it runs now it's fine once it's off and running, it doesn't stall quickly when sat idling but under initial acceleration it sits for 1-2 seconds before clearing out and accelerating with initially a lot of blue smoke. The HSN is definitely bob on so it is only the LSN that needs adjusting, does it sound too rich or too lean?
05-16-2010, 06:37 AM
#219
Hi guys,
i'm a bit of an amateur and have accidently adjusted my LSN on my OS speed while adjusting the throttle ballstud position!
As it runs now it's fine once it's off and running, it doesn't stall quickly when sat idling but under initial acceleration it sits for 1-2 seconds before clearing out and accelerating with initially a lot of blue smoke. The HSN is definitely bob on so it is only the LSN that needs adjusting, does it sound too rich or too lean?
i'm a bit of an amateur and have accidently adjusted my LSN on my OS speed while adjusting the throttle ballstud position!
As it runs now it's fine once it's off and running, it doesn't stall quickly when sat idling but under initial acceleration it sits for 1-2 seconds before clearing out and accelerating with initially a lot of blue smoke. The HSN is definitely bob on so it is only the LSN that needs adjusting, does it sound too rich or too lean?
Try the pinch test
05-17-2010, 03:08 PM
#220
i have been reading this whole thread to try to weed out the good and bad ideas and have tried them all.....but the 1 i like best is: GET THE MOTOR TO OPERATING TEMP,THEN DO A COUPLE HIGH SPEED RUNS AND LEAN THE HIGH SPEED NEEDLE LITTLE BY LITTLE TILL IT BOGS @ HIGH SPEED THAN RICHEN THE HSN ABOUT 1-2 HOURS DEPENDING ON YOUR OWN LIKEING.....THEN LEAN THE LOW SPEED NEEDLE LITTLE BY LITTLE TILL IT BOGS WHEN THROTTLE IS QUICKLY APPLIED,THEN RICHEN IT ABOUT 1-2 HOURS DEPENDING ON YOUR LIKEING AGAIN....IF YOUR MOTOR IS IDLEING ALITTLE HIGH JUST BACK OFF ON THE IDLE SCREW TILL IT IDLES AND THE CLUTCH IS NOT ENGAGING....AFTER THATS ALL DONE YOUR MOTOR WILL SCREAM! AND IDLE GREAT!
Last edited by deadmancourt; 05-20-2010 at 01:07 PM.
05-21-2010, 04:28 AM
#221
........its for my ninja jx21 sorry for the incomplete details,anyway i just realized that i messed-up the MRN setting i just change the o-ring & its acting-up ,but i got it right this time ,so it will idle no-flame-out ............today i just noticed that theres some oil behind the flywheel ,i guess oil leak ,is this the time for replacement ??
05-23-2010, 09:11 AM
#222
Tech Rookie
losi mach 427 tuning
i need help i cant get this engine tuned right all its broken in just need help tuning it any help would be nice it dies after about 10 seconds of idling and wen i hit the throttle it just dies please help
i have had my aftershock for four years and still dont know how to tune please help
i have had my aftershock for four years and still dont know how to tune please help
05-24-2010, 08:29 AM
#223
Tech Elite
iTrader: (45)
Join Date: Jun 2003
Location: Somewhere in Penang Island, Malaysia
Posts: 3,495
Trader Rating: 45 (98%+)
i need help i cant get this engine tuned right all its broken in just need help tuning it any help would be nice it dies after about 10 seconds of idling and wen i hit the throttle it just dies please help
i have had my aftershock for four years and still dont know how to tune please help
i have had my aftershock for four years and still dont know how to tune please help
05-24-2010, 05:38 PM
#224
Tech Rookie
05-26-2010, 05:50 PM
#225
quick question..
i'm running in an engine axe cobra x1 evo .21
i've done about 2L through the engine now and it's starting to get some serious top end speed.
when tuning this engine i have found myself having to richen the mixture to get a better top end without lean bog (which i have experienced when running this engine in). so i richened the HSN by upto 1/4 turn..
does this seam right with a new engine? is this just the engine wearing in and finding new RPM?
also. when applying open throttle, backing off, then applying open throttle the engine would surge slightly on the 2nd take of... once again, is this just a result of a too rich mixture... both HSN and LSN, and/or the engine wearing in?
at all times the engine has blown blue smoke. with the spit test . spit evaporated after about 6 - 8 secs.
i'm running in an engine axe cobra x1 evo .21
i've done about 2L through the engine now and it's starting to get some serious top end speed.
when tuning this engine i have found myself having to richen the mixture to get a better top end without lean bog (which i have experienced when running this engine in). so i richened the HSN by upto 1/4 turn..
does this seam right with a new engine? is this just the engine wearing in and finding new RPM?
also. when applying open throttle, backing off, then applying open throttle the engine would surge slightly on the 2nd take of... once again, is this just a result of a too rich mixture... both HSN and LSN, and/or the engine wearing in?
at all times the engine has blown blue smoke. with the spit test . spit evaporated after about 6 - 8 secs.