Motor Tuning Problem - Almost dies after WOT    Gallery
View related threads: (in this forum | in all forums)

Logged in as Guest



Users viewing this topic: none
    Search This Thread  
 
Printable Version

All Forums >> RC Cars, Buggies, Trucks, Tanks and more >> RC Car Engines >> Car Nitro & Gas Engines >> Motor Tuning Problem - Almost dies after WOT
Page: [1]

Tower Hobbies Get Coupon Codes Brands  
Login
Message << Older Topic   Newer Topic >>
Motor Tuning Problem - Almost dies after WOT - 11/16/2012 2:59 AM   
iDrift10


 

Posts: 4
Score: 100
Joined: 11/16/2012
Last Login: 11/30/2012
From: San Antonio, TX, USA
Status: offline 		 Well before the colder weather my Revo was running perfect. However, now that the temp has dropped 30 degrees I'm having a little issue. I know that when the temp drops you should richen the HSN because of the denser air. My Revo was running a little warm (280-300) so I richened the HSN to get the temps down. Now that the temps are in a respectable range I'm having a issue after wide open throttle. From take off all the way through the power band the engine runs perfect; nice trail of smoke, nice performance, nice temps. However as soon as I let off the gas after a high speed run the car drops to a idle that is barely running then after a few seconds or if I tap the gas the idle returns to a perfectly fine healthy idle. If I lean the HSN back up to get rid of the almost dying issue the car over heats. Ran a few tanks trying to trouble shoot it and I just can't figure it out. Thanks in advance for any help.

Side Note: Running the Picco 26 Red Dot in it.


Hide Signatures
       Post #: 1

RE: Motor Tuning Problem - Almost dies after WOT - 11/16/2012 12:45 PM   
Ttowntoolman


 

Posts: 527
Score: 159
Joined: 6/15/2007
Last Login: 5/22/2013
From: Theresa, WI, USA
Status: offline 		It sounds like you should richen the HSN more.........

Hide Signatures

(in reply to iDrift10)
       Post #: 2

RE: Motor Tuning Problem - Almost dies after WOT - 11/16/2012 3:52 PM   
iDrift10


 

Posts: 4
Score: 100
Joined: 11/16/2012
Last Login: 11/30/2012
From: San Antonio, TX, USA
Status: offline 		The more I richen the HSN to more it adds to the problem

Hide Signatures

(in reply to iDrift10)
       Post #: 3

RE: Motor Tuning Problem - Almost dies after WOT - 11/16/2012 4:00 PM   
Anthoop



Posts: 1838
Score: 121
Joined: 2/3/2007
Last Login: 5/22/2013
From: Somerset, UNITED KINGDOM
Status: offline 		I agree..richen it a bit. Ignore the temps, adjust the needles to make it run properly.
Also ensure the idle screw is controlling the minimum throttle gap.

_____________________________

When I die, I want to go in my sleep like my grandfather,not screaming
like the passengers in his car at the time.

Hide Signatures

(in reply to Ttowntoolman)
       Post #: 4

RE: Motor Tuning Problem - Almost dies after WOT - 11/16/2012 4:29 PM   
iDrift10


 

Posts: 4
Score: 100
Joined: 11/16/2012
Last Login: 11/30/2012
From: San Antonio, TX, USA
Status: offline 		Richening the HSN doesn't make it run any better, it makes it more and more worse.

Hide Signatures

(in reply to Anthoop)
       Post #: 5

RE: Motor Tuning Problem - Almost dies after WOT - 11/16/2012 6:18 PM   
Ttowntoolman


 

Posts: 527
Score: 159
Joined: 6/15/2007
Last Login: 5/22/2013
From: Theresa, WI, USA
Status: offline 		Hard to diagnos on the net without seeing smoke and hearing the sound. LSN too rich could possibly do this, but it would be flooded out and smoke like heck upon re-start.

Maybe your tune was pig rich on the lsn and lean on the hsn before the weather change. Now it is beyond running too rich on the lsn with the weather change. Lean it out a couple of hours and look for improvement.

Good luck with you problem, maybe someone will chime in with your solution, this is all I got based on your info.....Cheers.

Hide Signatures

(in reply to iDrift10)
       Post #: 6

RE: Motor Tuning Problem - Almost dies after WOT - 11/16/2012 6:21 PM   
iDrift10


 

Posts: 4
Score: 100
Joined: 11/16/2012
Last Login: 11/30/2012
From: San Antonio, TX, USA
Status: offline 		 Idle gap and LSN needle are working like a charm. Idles beautifully, has perfect accel and smoke after idling. It's just the weather cooled down so I had to richen up the HSN needle a bit because it was getting to hot. If I lean out the HSN the problem goes away but it runs to hot. If I richen it it almost dies after WOT but runs normal temps. I've tried richening the LSN but it idles real high and tries to walk.

Hide Signatures

(in reply to Ttowntoolman)
       Post #: 7

RE: Motor Tuning Problem - Almost dies after WOT - 11/26/2012 6:58 PM   
racingfan48


 

Posts: 26
Score: 100
Joined: 7/22/2012
Last Login: 4/17/2013
From: Omaha, NE, USA
Status: offline 		you richened the lsn and it tried to drive off? thats kindof weird.  normally its if you lean it.  richen the hsn to and just make sure the power ban is good and has a good healthy stream of smoke.  i never really watch the engine temp. they just use it as a guide line.  all motors will run differently.  if it continues to want to almost die when you let off try leaning the lowspeed just a bit and adjust the idle screw if it spikes up.  what it sounds like is what my Savage XL wanted to do all the time.  it always would actually completely die after a WOT pass.  i reset all the needles and tuned the high speed then the low and idle.  what happens really when the truck does that is the high speed needle is too rich and when you let off that unburned fuel lugs the motor up a bit then once the LSN takes over and meters out the right amount of fuel it comes back to normal.  thats what i found has worked for me, hopefully that helps and if not just reset the needles.  does the carb have a mid range? my experience has been any motor with an adjustable mid range causes problems.  im looking to find a carb that will fit the 5.9 to get rid of the mid range because the motor looses any kind of consistency but now im rambling.  try putting the needle back to where it was and make extremely small adjustments like 1/12, to 1/16 of a turn, it doesnt take much. on my inferno gt 2 it required only a 1/12 of a turn to get it running from 75 degrees to 45 the other day

Hide Signatures

(in reply to iDrift10)
       Post #: 8



Page:   [1]
All Forums >> RC Cars, Buggies, Trucks, Tanks and more >> RC Car Engines >> Car Nitro & Gas Engines >> Motor Tuning Problem - Almost dies after WOT
Page: [1]





Jump to:


 
Google 



Search | Marketplace | Event Calendar | Local Clubs | Magazine | Product Ratings | New Products | Discussion Forums

Photo Gallery | Instructor Search | Field|Track|Marina Search

Advertisers | Hobby Vendor Resources | Rate Manufacturers | Sign In/Sign Up

SITE MAP!   : :   FORUM RULES

RC Universe is a service of Internet Brands, Inc. Copyright © 2001-2013.

Charities we support that also need your help
Yorkie Rescue | Humane Society | ASPCA | Crohn's-Colitis America


0.844RCU1