Is there a way to stop the car from back firing on a stripped niki carb.It is an rx3 carb.

 

im pretty sure backfiring really doesnt have much to do with the carb... i have a NON-stripped nikki and mine does it lol

 

I am pretty sure the dash pot is supposed to keep this from happening. Also... stop letting the throttle slam shut from high rpm or load.

 

mine has the dashpot, so it doesnt slam shut.. the car only backfires over 4k rpm's when i let out of the gas and dont push the clutch..

booky, when does yours backfire? at idle or like i described?

it is evidently a normal thing that mines does. you must remember how rich rotaries run, and that the burn ratio is pretty horrible as well lol... all that extra fuel has to go somewhere, the exhaust just happens to be the best place for it, and the exhaust is pretty warm....

 

It only does it when the I let the throttle off from higher rpm I was just wondering if there was a way to lean it some to get it to not back fire. And I did not know if leaning it out would hurt the motor?

 

Rotaries don't really run rich. Well you're might, but most don't. What actually is happening is at high RPM and high vacuum, it pulls a ton of fuel through the idle circuit; way more than is needed for conditions at that moment, and all this unburned fuel hits the hot exhaust system where any little exhaust leak (oxygen) combines and BOOM!

I just experienced this yesterday on an almost brand new RB "streetport" exhaust with new gaskets during a hard decel condition like I just mentioned. It's very easy to produce this effect on a rotary and nothing to worry about, as long as it's "afterfires" in the exhaust, not "backfires" through the carb. I kinda like the afterfires myself.

 

ok, do they run rich at idle?? mine smells like a race track if i just let it sit and idle and i asked if that was normal on here when i first got my car and everyone said it was... oh well, i like the "afterfires" as well, fun to show off to your buddies lol..

 

You made me remember a funny store I had a bother who past away that had a carb car he would be driving down the street turn the car off pump the throttle a couple of times and light it up seen many of kids hit the side walk and old ladies run for cover.

 

Just for those that want to try this, it is a good way to blow the muffler apart.