+1...9901 will provide a bit more bottom than 2096 in truggy.

I run a bonito 7xl in my xray xb9 13 and love it it is so smooth in its power delivery with a 9901 pipe .i have watched 4btt in cars and I think they have a lot moor bottom end snap with a 2096

just ordered a keep off 7 and will be runing on byron gen2 30%
any advise on glow plugs, idile gap and carb insert size for
break in and for race tune.

The plug included is fine for break- in (6) and idle gap you'll have to play by ear and as far as carb size for break in, I don't think it really matters, I used the 7mm insert, think its orange (could be wrong). Preheat it first and follow the break in steps via the break in bible (Houston)

You should run the yellow or red venturi for break-in, then after you are finished with the break in you can switch to the blue or the white venturi.

Overheating problem for my Keep-Off .21-7XL
 

I am running the engine for my Team C T8 buggy.I have run 10 tank of 5% fuel to break in the engine.When I was running the engine ,when it was at full throttle for running a long straight road.The temperature of the engine kept rising from say , 260F >>> even 300F .I have checked there is no leaking ,the spongy filter is clean , the glow plug is the original one.Could you guy tell me what's wrong with my engine?

THX!!

Overheating problem for my Keep-Off .21-7XL
 

I am running the engine for my Team C T8 buggy.I have run 10 tank of 5% fuel to break in the engine.When I was running the engine ,when it was at full throttle for running a long straight road.The temperature of the engine kept rising from say , 260F >>> even 300F .I have checked there is no leaking ,the spongy filter is clean , the glow plug is the original one.Could you guy tell me what's wrong with my engine?

THX!!

Keep off .21-7XL temperature keep rising ?
 

Hi Guy, I am running a new keep off .21 with proper break in for 10 tanks of 5% beak in fuel.I use the C6T glow plug and the white carb. Restrictor,the HSN and LSN kept factory default,air filter is clean ,no leakage of fuel tubes.When I turn the full throttle and keep running at the highest speed , it's temperature kept rising and even over 300F. I have tried to rich the engine but it seemed nothing help.So any ideas for the reason why the engine kept rising on temperature?

Happy to see the solution cause I cannot enjoy with continuous running of my Team C t8 buggy!

The Beat B5 is %100 identical to the P5XLT, right?

And modded (for more top end I assume) these can be up there with the Bonito in terms of crazy power?

Too much power for my tires!!!!
My previous nitro engine experience was with a 20 year old small red head picco. I think 3 ports
Now with the P5xlt I was running too rich on the lsn. Since I started leaning it....holly molly. This thing ripps. I can't imagine peoples who need more power and get modified engines. I did slight port work before breaking so I can't compare the stock engine though. My tires won't last long!!!####!!!!
Very happy

Too much power for my tires!!!!
My previous nitro engine experience was with a 20 year old small red head picco. I think 3 ports
Now with the P5xlt I was running too rich on the lsn. Since I started leaning it....holly molly. This thing ripps. I can't imagine peoples who need more power and get modified engines. I did slight port work before breaking so I can't compare the stock engine though. My tires won't last long!!!####!!!!
Very happy

So i ran my P5xlt and swopped the 9901 pipe for the 9886 and although i did not notice much top end performance, the run time was good at 11:30 with a bit to spare in the tank. Air temps are 8 degs cooler then our summers so will be intresting to see what happens later in the year. Running the stock venturi on the motor (6.5). Will post how my first race goes with this pipe.

you must be smoooooth on the throttle finger. I try my best and still hang around 9 minutes tops at my local track.

Can anyone tell me the factory tune for a nova .21 plus 5k

Motor is way out of wack and I would like to go back to stock screw positions
And tune from there

Thanks your help is appreciated

Can anyone tell me the factory tune for a nova .21 plus 5k

Motor is way out of wack and I would like to go back to stock screw positions
And tune from there

Thanks your help is appreciated