a friend of mine was telling me that NOS now has kits avalible that use a double fogger like a wet system, but it inject propane instead...making for a completely DRY, dual fogger system...there is no need to get a bigger fuel pump or anything, the entire system is self contained...no puddling of fuel in the intake!! http://www.i-club.com/ubb-files/smilies/biggrin.gif

Did you call NOS to verify that what your friend was telling you is the truth or that he wasn't misinformed? Just curious!

What applications is this setup for?

i'm waiting for more info myself...will post when i get it...http://www.i-club.com/ubb-files/smilies/biggrin.gif

Couldnthinkaone:

You should ALWAYS make sure when using nitrous that if using more than 50hp shots your fuel pump supplies enough for the air-fuel mixture. Usually you should upgrade your fuel pump. Though I don't remember exactly the formula, you may check NOS website. Im sure they have the formula posted or at least some tips.

Julio,
you should read my first post again...you dont have to because you don't NEED any extra fuel...that is what the propane bottle is for!

Julio - the point behind this system is it shoots propane a fuel, as well, so it is adding fuel as well as extra oxygen, hence the fuel system not needing to be upgraded. This is an interesting theory, if not wholly practical.

If anyone wants to know, just call NOS at (714) 545-0580 and talk to a technician. No need to wait for info. Their website is: http://www.nosnitrous.com/HiOctn/ProdLine/Products/NOS/catalog.html

Keep it simple! http://www.i-club.com/ubb-files/smilies/biggrin.gif

actually the tech dept's # is 714 546-0592...i just talked to mike there...he said that this type of system is used in higher hp applications, he's put together systems for vipers because they puddle fuel in the intake when running a wet system, kinda like imprezas. this is used where the owner has put all the power through their motor they can w/a dry system. not something new, but definately something interesting...

I have seen that setup on Grand Nationals, people running propane or alchohol and putting out 1000hps. I don't think there is a kit for that, you will need special injectors I think. Actually, I have heard rumors about a certain 3000GT VR-4 down here in So Cal is getting that setup done right now. He will be running alchohol instead of NO2, and he is considering propane in the near future.

<FONT size="5">oooph!!</FONT s>

I'm interested in the wet vs dry issue on a WRX. I understand fuel puddling with a wet kit, since it happens in EFI 5.0 intake manifolds as well.

I thought that Impreza's and WRX's had returnless fuel systems, making the use of the dry kit's nitrous regulator impossible. Do WRX's have a return style system with a fuel pressure regulator? Does the WRX computer monitor fuel pressure? If so, I'd run a dry kit rather than wet. Thanks.

"I thought that Impreza's and WRX's had returnless fuel systems, making the use of the dry kit's nitrous regulator impossible."

I can't answer the other things you spoke of but I can say this....I've been using a dry manifold NOS system for the last 2 years. It's kit #5122 for the 2.2ltr motor. 2.5RS's would use kit #5123. The motor is still running strong but even healthy people die of heart attacks while jogging so who knows. See how optimistic I am?!? http://www.i-club.com/ubb-files/smilies/biggrin.gif

Actually not a new twist. Propane has been used with nitrous for quite a while now, (just not on Subies to my knowledge.) An old Petersen Publishing book, "Super Power, Superchargers, Turbochargers and Nitrous" has a small section on using propane as the supplementary fuel, as well as a picture. Up here in the Great White North, propane is relatively cheap, and quite a few drag racers have been running propane and turbos, propane & nitrous, and propane in diesel engines as a power supplement. The propane delivery to the intake system is very simple, using a venturi injector ring, preferably downstream of the I/C (In case of back fire.) Propane has an attractive octane rating, and has a "soft" combustion characteristic that is easy on an engine. The disadvantages are there though, Bottle and vaporizer mounting, engine coolant plumbing to and from vaporizer, solenoids, etc.
An old timer in California by the name of Ak Miller, who ran (runs?) a propane conversion shop, is the recognized expert on this very subject, or any other you may have regarding the use of propane in a high performance environment. He would be well worth looking up.

Regards,

OOoops! LOL http://www.i-club.com/ubb-files/smilies/biggrin.gif Sorry for the misunderstanding.