Same here, he gets his tomm. He loves how it looks. He had to buuy one. I think I may buy another. I love this Mil.

We were having some problems like this at the 1st round of the Pro Series through qualifying. We would put a new plug in and in warm-up and the first 3 minutes of the qualifier everything was fine. Then all of a sudden the plug would go and the engine would die. Ended up being something going on with the fuel tank (Had been using the same tank for at least 6 months). After putting on a new fuel tank everything was good.

Will check the tank. Thank you. But Sent Mil to Steve. I still think there is an issue.

Last weekend it was hot and humid here in FL. Justin’s temps on both truggy and buggy were between 265-290 after the mains. Both run great and were not overheating. Our temp gauge is about 30-40 degrees off. You will know when the engine starts getting to hot. It will loss power and the idle will be popping all over the place.

Tank is cleaned up nice, and see no issues or holes.. what else shall I look for. I will be replacing all fuel lines next.

Check the o-ring in the lid. It may not be worn and not getting a tight seal on the tank opening. Mine loosened up over time, and I had to replace it.

The pressure loss will result in not getting enough fuel flow to the engine....which means it will run exponentially leaner as the fuel level drops, and the volume of air in the tank increases.

Thank you. I have checked that over also. New tank is on the way also. I am not having a Lean Problem. I am having a Overly Rich, Not wanting to Idle, Plug Malfunction, Carb Issues... Lean Is my least issue.

Same here. I tune my engines by how the engine feels on the track. Last year at the Nats at Leisure Hours, my truggy with an OS Speed (with titanium head) was running excellent and when I came off the track someone temped me and want to start changing it, because the temp gun read 275. I told him not to touch it, as it ran fine during the whole race, responded nicely and cleaned out well.... Too many are fixated on temps.

One thing that you have to keep in mind when you do tune by temp: CLEAN YOUR TEMP GUN! The sensor gets dirty and throws off your reading!! And always tune with the same temp gun, as each temp gun gives different results!

Still loving my SS. Coming from OS Speed, I bought the SS just to check it out and so far it is working out excellent!! Idles like a champ, plenty of power and strong throughout the powerband with a linear powerband very similar to OS Speed!

I want to thank you all for your opinions!! I am greatly appreciative! After reading the different ideas, i realized that my buddy was using his temp gun during practice, then I used mine and got the high reading! I am using the duratrax temp gun that is about 2 years old. I think the battery is going dead! This thing had me completely confused! I think i am going to get a new one. What brand would you all recommend? I have seen alot of the Odonnell ones at the track and bunch that don't have a label, probably the really expensive ones! I am on a budget so please don't tell me the top of line expensive ones.

Thank you!!

glad you got if figured out... some things we all over look... i use a temp gun only and only as a reference point... i run the vehicle until the motor feels good. good smoke and low end.... and a nice hint of smoke on the high end...

for temp guns i have and o'donnell, ofna, duratrax and an exergen... yes i use the exergen 99% of the time but when i have any doubts i use all of them to check against each other... all 4 are within 10 degree's of each other... if 1 is way higher i send it in for repair after i change the battery and recheck...

all a temp gun is for reference only... if there is smoke you are always good... no smoke then stop and richen up right away.... read the tuning bible on top of the nitro section. follow that and you will always have a good strong running engine.... jeremy

What a great motor/ pipe combo. Was running a SS .21 and JP-4 combo in my buggy and a SS .21 and JP-1 combo in my truggy. Put an R2 on both and was able to lean the buggy out 2 more hours and the truggy 3 hrs. Haven't checked runtime yet but it felt considerably longer (seat of the pants never lies LOL). Performance was increased on both before leaning them out. I'm a believer in this motor, I haven't found a better one for the money. Not even close. BTW, both of my pipes were missing the set screw for the pipe hanger, anybody else missing theirs?

hi guys i was just wondering where i could get me hands on a pipe and headerto suit this motor please help

Towerhobbies

Hey i got about 15 tanks of fuel on my new 21ss what kind of run time's are you guys getting, i was just getting a little over 5 mins what do i need to do to get more run time

I'm getting about 7:45 with my buggy and about 9:15 with my truggy with this motor and the R2 pipe on a smallish tight track with a long full throttle back stretch. Tuned sort of rich temps come off track at about 215. Pipe definately helps runtime as well as a good tune. Running 20% Byron's fuel also.