Do I have the right jets?

[YZFER]

I have a 3.4l. I used an online calculator and bought a 47 for the nitrous and a 28 for the fuel jet. This is for a 100 shot using 1100psi with 43 as the fuel pressure. Is this right? I am concerned because I had my first backfire with this larger shot. Thanks.

[YZFER]

Re: Do I have the right jets?

This is a dynotune wet kit. One more thing.. these 100 shot jets are are NOS brand. Is that a problem? Are different brand jets interchangable?

[mlsFiT]

Re: Do I have the right jets?

Search around online and you should be able to find a nitrous calculator. As for the jets and sizes, different brands work off different PSI. Where do you have the fogger nozzle mounted?

[97rs4life]

Re: Do I have the right jets?

NOS will work in dynotune nozzles last I heard.

NX have a different size jet that is fatter diameter

[ssms5411]

Re: Do I have the right jets?

The .028 fuel jet is too big, I think you should be around a .026 or .024. Need to either to get on a dyno or get a wideband to see what your air/fuel ratio is. The .047 will get you 85 hp at the wheels and 100 at the crank.

[RadRacer]

Re: Do I have the right jets?

I'd say go with the .028. The calculator I usually used says you should go .027

[YZFER]

Re: Do I have the right jets?

Thanks for the responses. If I understand correctly, it was probably a little lean with a .028 fuel jet. Why did it backfire then? Doesn't a backfire suggest that it is too rich with fuel?

[mlsFiT]

Re: Do I have the right jets?

I think its just the way our intake manifolds are designed, causes gas to puddle. Thats why I went with a dry set up... Where did you mount the n2o/fuel nozzle?

[Shodown]

Re: Do I have the right jets?

Thanks for the responses. If I understand correctly, it was probably a little lean with a .028 fuel jet. Why did it backfire then? Doesn't a backfire suggest that it is too rich with fuel?

The .028 is a lil big causing it to run rich and backfiring.

If you run lean you will burn up a piston, not backfire.

The only way to know for sure is by getting a wideband.