What causes a nitrous backfire???
Staging Lane
Joined: Jul 2004
Posts: 56
Likes: 0
From: Waco
Originally Posted by Fast94bird
Standard automatic, what gear was it in? How hot was the car? What was the bottle pressure 2nd pull.
Back fires are caused by lugging the motor, not fuel puddling.
Back fires are caused by lugging the motor, not fuel puddling.
its caused by a wet kit only. when fuel gets antomized with nitrous oxide sometimes the fuel falls out of the mixture. this happens because fuel is more dense then air mixed together.think of fuel holding onto air but falling out of place because its to heavy to move.
hopefully you understand this much. sometimes when to much fuel falls out it stays in the intake runners.this is called puddling, when to much finally is in there the fuel in the intake will ignite.... and well thats all she friggen wrote. if you have backfire ports in the intake normally this will prevent engine damage. LSX and NX make intakes for this purpose, so does hollys intake as well.
this is why most people run dry or dp kits. all kits can be made safe and with the proper tuning can last longer then engine life, but its known that dry leans out while wet "puddles" which is why dp kits are the best. you can adjust each cylinder this way so can run say 40 per cylinder. total that would be a 320 shot, not good on stock interals but you get the point. wet isn't exact neither is dry.... and neither is dp unless tuned properly.
but anyways i think i went beyond the call of duty, hope that answers your question. IMHO i wouldn't have switched a jet based on a 15:1 a/f mixture. maybe look at fuel pressure and play for fuel tuning first. answer nitro dave can probably tell you exactly what happened just give him full details and i sure he has heard it or done it himself.
thanks for reading,
erik
hopefully you understand this much. sometimes when to much fuel falls out it stays in the intake runners.this is called puddling, when to much finally is in there the fuel in the intake will ignite.... and well thats all she friggen wrote. if you have backfire ports in the intake normally this will prevent engine damage. LSX and NX make intakes for this purpose, so does hollys intake as well.
this is why most people run dry or dp kits. all kits can be made safe and with the proper tuning can last longer then engine life, but its known that dry leans out while wet "puddles" which is why dp kits are the best. you can adjust each cylinder this way so can run say 40 per cylinder. total that would be a 320 shot, not good on stock interals but you get the point. wet isn't exact neither is dry.... and neither is dp unless tuned properly.
but anyways i think i went beyond the call of duty, hope that answers your question. IMHO i wouldn't have switched a jet based on a 15:1 a/f mixture. maybe look at fuel pressure and play for fuel tuning first. answer nitro dave can probably tell you exactly what happened just give him full details and i sure he has heard it or done it himself.
thanks for reading,
erik
False.. dry kits can backfire also.
