EB Mods JS Engine
05-24-2010 | 09:59 AM
#811
I have almost a gallon through my full mod. The Hut was canceled today so me and my buddies just burned nitro on the track all day. I am going through P5's like it's going out of style. I will run a quart through the engine and give it a rest. I go back to start it and the plug will be dead. The coils are severing up inside the plug.
I have been having a hard time keeping this motor from stalling. If I come in for fuel and don't keep it clear than I will flame out as I drive down the ramp. The motor is running strong when it's running, temps are averaging around 215, it's got tons of top end. It's blowing smoke coming out of turns all the way down the straight. The coils look dry with some oily soot around the tip of the plug.
Here is my tuning rational and probably where I am going wrong. I feel like every time I come in for fuel the motor loads up. I have been leaning little by little on the bottom end to slow the fuel going in at idle. Should I be leaning the top? Leaning the top would limit the total amount of fuel going into the engine. The reason why I went for the bottom was because I felt like the top was clearing out well and the running temps were good.
I used all my P5's so a fellow driver was kind enough to loan me a P4. That was the last pint I ran on the motor but it was running real well with the P4, it never flamed out, idled well and flat out ran awesome for a good session of driving with my friends. These ailments I am suffering from are caused by me. I just need a little help from you guys to get me on the road to a solid tune. Maybe keep running the P4 and see what happens?
This motor is very, very fast, I have said this before but I have not seen the top end fully unravel yet. With the 086 pipe I have to drive it aggressively to keep it on the pipe. Nothing crazy, this thing just wants more all the time. The bottom end is a little soft, the mid comes on real strong and smooth and then it just screams out to the top all day. Is this the general consensus with this pipe and motor combo?
Let me know what you guys think about my plug popping and load up/flame out problem. I was running P5's with Byrons 25/11, temping around 215 at the Hobby Hut today.
I have been having a hard time keeping this motor from stalling. If I come in for fuel and don't keep it clear than I will flame out as I drive down the ramp. The motor is running strong when it's running, temps are averaging around 215, it's got tons of top end. It's blowing smoke coming out of turns all the way down the straight. The coils look dry with some oily soot around the tip of the plug.
Here is my tuning rational and probably where I am going wrong. I feel like every time I come in for fuel the motor loads up. I have been leaning little by little on the bottom end to slow the fuel going in at idle. Should I be leaning the top? Leaning the top would limit the total amount of fuel going into the engine. The reason why I went for the bottom was because I felt like the top was clearing out well and the running temps were good.
I used all my P5's so a fellow driver was kind enough to loan me a P4. That was the last pint I ran on the motor but it was running real well with the P4, it never flamed out, idled well and flat out ran awesome for a good session of driving with my friends. These ailments I am suffering from are caused by me. I just need a little help from you guys to get me on the road to a solid tune. Maybe keep running the P4 and see what happens?
This motor is very, very fast, I have said this before but I have not seen the top end fully unravel yet. With the 086 pipe I have to drive it aggressively to keep it on the pipe. Nothing crazy, this thing just wants more all the time. The bottom end is a little soft, the mid comes on real strong and smooth and then it just screams out to the top all day. Is this the general consensus with this pipe and motor combo?
Let me know what you guys think about my plug popping and load up/flame out problem. I was running P5's with Byrons 25/11, temping around 215 at the Hobby Hut today.
05-24-2010 | 10:31 AM
#812
well js's ran great this past saturday ended up chopping up another victory in truggy and 3rd in buggy with another js winning buggy. had a little mechanic tuning error (me) in the begining of the day with my truggy. I changed my fuel lines and was running to short of a pressure line causing my motor to want to run fat top with a little bit of lean bog. if anyone else is having this problem check you pressure line should be right around 7 inches.....
05-24-2010 | 01:01 PM
#815
fuddy, sounds like you still need to lean the bottom some. Glow plugs can pop like that if the bottom is too rich, the excess fuel under pressure rips the coil in half. the p4's maybe a tad easier to tune, and if it ran better with a p4 its deff because the bottom is fat. also if you feel your not getting the grunt out of the corners try clutching up a bit cause it should rip on the bottom.
As far as clutches go I am running the stock Losi setup that comes with the race roller, it's the four blue aluminum shoes and the springs they have installed, what are they the Green and Black? What springs would you recommend, what do you run Joe? If I can get the punch I get in the middle at the bottom, this thing will feel damn near electric. I am running the Ofna 086 pipe with the [ shaped manifold, would I get more low end from a ( shaped manifold?
05-24-2010 | 01:14 PM
#816
Thanks Joe, I will continue to run my current tune with the P4 I have installed. If it runs reliably than I will leave it otherwise I will work the low speed leaner a little at a time.
As far as clutches go I am running the stock Losi setup that comes with the race roller, it's the four blue aluminum shoes and the springs they have installed, what are they the Green and Black? What springs would you recommend, what do you run Joe? If I can get the punch I get in the middle at the bottom, this thing will feel damn near electric. I am running the Ofna 086 pipe with the [ shaped manifold, would I get more low end from a ( shaped manifold?
As far as clutches go I am running the stock Losi setup that comes with the race roller, it's the four blue aluminum shoes and the springs they have installed, what are they the Green and Black? What springs would you recommend, what do you run Joe? If I can get the punch I get in the middle at the bottom, this thing will feel damn near electric. I am running the Ofna 086 pipe with the [ shaped manifold, would I get more low end from a ( shaped manifold?
05-24-2010 | 09:09 PM
#822
hey Peter, wadup Joe..........
my race prep JS is running good at 2 gall mark..........I ran midwest rcps this weekend, I wasnt able to qualify due to work so I started 12th overall in A and was in 4th by 3rd lap, then I flamedout 2x and finally popped a plug due to overly rich bottom would be my guess, I would have had a podium finish but my tune was off and I paid, totally my fault
Pucci got my tune dialed today at practice, it's real good now, Im going to start running the fullmod very soon..........Loving the engines guys, thanks Ed, Joe and Peter.
my race prep JS is running good at 2 gall mark..........I ran midwest rcps this weekend, I wasnt able to qualify due to work so I started 12th overall in A and was in 4th by 3rd lap, then I flamedout 2x and finally popped a plug due to overly rich bottom would be my guess, I would have had a podium finish but my tune was off and I paid, totally my fault
Pucci got my tune dialed today at practice, it's real good now, Im going to start running the fullmod very soon..........Loving the engines guys, thanks Ed, Joe and Peter.
05-25-2010 | 07:27 AM
#823
RE10 just as good. Perfect in my mbx6. I was previously getting 8:40 till run dry (im a little hard on the throttle) now I get 10:25. I just hit the 2 gallon mark and am more then happy with my stock JS so far. Gona try it in my truggy this weekend to see how it feels compared to my nova p5x.
