[:@]My v-spec is back firing and then it dies? i got a little over 1 gal in it. it still has tons of compression. it does it at high speed (full throttle). i set it back to stock settings and re-tuned it. the temps were good (230) and i took the back plate off and the conrod and everything looks great. ive never had a prob one, until now? can anybody help? it sounds like a fire cracker going off and it dies???

sounds like its too lean/you're using old or plain horrible fuel. use stuff with good oil content, i think 16-18% oil is recommended by OS.

back fire like a loud pop?

I know a few of my engines have idled down really rough and I leaned them out a little and it settled it down and made it extrelmyl smooth.

i use 20% blue thunder. and yes its a loud pop. i just changed the glow plug. im gonna clean the carb and try to lean it out because it did seem a little rich. i can tune it right and had it tuned exactly the same as another guys at the track and it still acted up. i put the blue insert in and same deal???[&o]

Nitro engines can't backfire. FACT. They can run backwards as the timing remains the same. The poping you are experiencing, I guess would be because you have not changed a setting on the mixture and would mean it is way to rich. If you've run that much through the engine then you really need to lean her out now and get those wheels ripping up the dirt.

i use bluethunder and mine started 2 bk fire as well

ive had an engine backfire once, flames came out of the exhaust ! it was cool ( beevis voice over) uh huhuh hu huuh ... Id guess its your plug... what you using ? id try an OS5 in that engine see what that does..

grahama- thanks i talked to a guy and he said the exhaust is filling up w/ fuel and it is ignighting.so i will lean it out some more. i had it lean and it brought the temps up a little higher than i wanted but, i will just have to" let it rip"

yeah man once my savage back fired it was awsome the savage is so loud and it make it much louder i thought my engine blowed

Bader

KUWAIT

thats kinda funny.....everything i ever owned (motorcycles, cars, etc) backfired....but never my rc stuff.....

how loud is the pop?? sound like a little .22 rifle or something?

it was loud enough that 8 buggys were on the track and you could hear it well. i thought it blew up like Q8 RC said." irobotix" i will figure it out and let you guys know whats up!

the v-spec is fixed ! i went through and cleaned the carb, fuel filter, and changed my fuel lines and air filter. the thing runs and i mean RIPS!!! i think a piece of dirt was in the carb or i had a air leak? but what ever it was it purrs now [>:]