wet-vs-dry

[Mtndragon]

I have run a fogger system on BB V8 mud racing trucks/rails. other than that I have NO experience with nitrous except for less than two weeks on a friends '71 R/T Charger 440 6pk (unfortunately sent to junk pile by tow truck accident, completely unrelated to the n20 kit )

I think "wet is better" for forced induction because of the -well, what do you think?

(I think you'd get better control and less chance of puddling/explosion with a wet set uyp -vs- a dry)

[TheJackal]

Wet is nitrous and fuel added through the same jet at the same time.

Dry is just nitrous. Mostly, stock cars (naturally aspirated) run rich enough to run a dry shot around 40.

I knew a girl that ran a 60 shot on a stock DX honda for something like 20,000 miles and then it blew up.

Single port is just 1 nozzle, usually before the throttle body on dsm's. However direct port is better (and more expensive) because its per cylinder and a perfect mixture of nitrous and fuel (well if you know what your doing). A single port is arguably worse because of the way the stock intake manifold is built, feeding air from one side so the closest cylinder recieves more nitrous (or mix) then the farthest.

That should do it till the head haunchoes get here. ;)

[v413nc3]

Nope Austin, you pretty much nailed that one on the head.

[KeltonDSMer]

For a single port, don't get a dry system for the exact reason mensioned above. One cylinder ( I think it is #4) would get most of the extra O2, but the extra fuel to compensate woulde be distributed evenly across all cylinders.

That cylinder is lean the whole time the NO2/fuel mixture is being sprayed.

A wet mixture will still have the same bad flow pattern, (going into the closest cylinder to the throttle body), but at least it is a Fuel/O2 mixture rather than just a bunch of extra oxygen going into the closest runner.

Wet is obviously better than dry in a single fogger IMO; also, a direct port system is almost where the injectors are anyway, so it seems there would be no advantage to using a dry system in these applications either.

[TheJackal]

For a single port, don't get a dry system for the exact reason mensioned above. One cylinder ( I think it is #4) would get most of the extra O2, but the extra fuel to compensate woulde be distributed evenly across all cylinders.



Why would the nitrous not be divied up evenly but the fuel would be? It seems like atleast the fuel to n2o would be mixed right by itself, its just more of both would hit cylinder number 4, before cylinder number 1?

[KeltonDSMer]

I'm speaking of a dry system like ZEX that increases pulswidth of the injectors to add fuel.....this is no good if more extra O2 is hitting #4 than #1 because the extra fuel injected would be even across all cylinders.

I think what you are talking about is a wet system in which there is a fogger nozzle that mixes the N2O and fuel together. The same crap about a dry single ports applies to the wet single port, but like you said, at least the fuel/extra O2 is squirted in the intake already mixed so there is no air/fuel ratio differences between the different cylinders. Not great, but not as bad as a single port dry system.

I think this is why so many hondus blow their motors......it isn't the extra power produced by the airflow, but a consistant lean condition in the closest cyl. to the TB when using "dry" nitrous systems.

[TheJackal]

Yea, I was talkin about wet, I think were both on the same track..

Heres another question, why not throw the jet in before the intercooler? Wouldnt that mix the air even more? (Wet shot - single mixed jet)

[Reef187]

Well I would think that it's not the best idea to have fuel in the IC or piping, and you'd be blowin off n2o and fuel between shifts... Also, wouldn't you lose some of the benefits of the n2o cooling the intake charge...? Just my .02

[TheJackal]

There was a discussion on the galant board about spraying nitrous before, or maybe it was alkie before the intercooler, and how much colder the intake charge got when you have it go through the IC, but yea blowing off fuel and nitrous with a red hot manifold 2 feet away could be really bad.

[KeltonDSMer]

Use water/alcholol injection before the IC if you want lower intake charges.....or buy a bigger IC.

[DlandryTSI]

Or just do a shot of nitrous either single fogger or direct port. I experimented with that this year and with a 20 shot the car gained 50+ hp.

--Dave

[TheJackal]

Use water/alcholol injection before the IC if you want lower intake charges.....or buy a bigger IC.

Uh yea, I already knew that, its not new info, common sense.

[v413nc3]

Ok, lets get back on topic.