spray

[sweet78]

just was trying to get some info on were to start on the fuel jet 4 a plate syestem???? u start 10 sizes biger than before or wat a good starting point?????

[teddybear]

go to o2technologies.com they have experimented alot with e85 and nitrous

[High Roller]

I made charts based off of the area of the orifice size (drill diameter). Area is a function of flow. Dont just go off of jet size.

I have it setup in a couple ways, altering the fuel jet or altering the nitrous jet. Why? On plate system you run into the max jetting on fuel before you do nitrous, so you may want to put the max fuel jet in and tune with the nitrous jet to get the max ability of the plate on e85. Problem with that is you wont get the advetised HP gains that that fuel jet is tied to.

If you alter the fuel jet (easier with a fogger) and keep the advertised nitrous jet, HP gains should be similar to advertised.

Also I did it using the 25% and 30% rule. I am going to start at 30% more fuel (if I ever get it running right) and go from there.

See what you think. Let me know if you dont agree. I was surprised at the small changes, but remember, it all has to do with area, and it doesnt take much increase in diamter to get a large prercentage increase. Also keep in mind, the decimal place is limited to 3 places so some show no change between 25 and 30% due to the small change in percentage. It is rounded to the nearest thousanth.



Example: On the cheater plate, max useable fuel jet that come swith the cheater kit is .102. Thats is your ceiling. So according ly the largest useable N2O jet that comes with the kit is the .082. Now this will end up actually being more than a 30% since the 30% nitrous jet is actually supposed to be .083. Resulting in a lower than 210 HP increase (using advertised numbers).

Percentages are refered to as increased fuel flow.

[High Roller]

Also NOSVette siad that on one of the other nitrous sites (i am drawing a blank now) they actually have tunign for ethanol, methanol, E85, and gas.....cant remember which friggin brand now....

[sweet78]

Also NOSVette siad that on one of the other nitrous sites (i am drawing a blank now) they actually have tunign for ethanol, methanol, E85, and gas.....cant remember which friggin brand now....

on nx site they go up like 5 jet sizes on fuel on every tune

[High Roller]

at this time Id trust them over me, but let me do some more digging. My chart shows 3-5 jets depending on your starting size (so I am thinking I am pretty dang close). You cant say a blanket 5 jet size increase. You have to take into account where you are starting. They may be playing it safe like most do even on gas, but maybe more so on e85....who knows.

We are going for 25-30% more volume. There is a component of presure drop with a larger orifice (allbeit it will be small in the grand scheme of things), but Ill verify tomorrow...

[pumpgas]

Ok after extensive conversation with NX they have done a lot of testing with E85 and N2O. I for 1 will be getting a conversion plate kit from them this week and they come with the plate, jets, tune ups for different fuel pressure. Oh and their systems are RWHP rated not FWHP like the others.

[teddybear]

02-technologies.com has e85 nitrous kits for sale for a plate and fogger kit. the kit includes the jets and hp charts

[High Roller]

ok did my "more diggin" and I was correct in my calculations. Flow through an orifice is directly proportionate to the area (assuming you reset pressureafter increasing orifice).

Everyone is more than welcome to use it or not. I have two systems already (using one) and I am not buying more....so I am going to work with what I got.

[teddybear]

the kit for a plate system is only 30 or 40 bucks. its not a complete kit (well they have complete kits) all it is is jets and charts. most of you will probably have to buy different jets anyways.

[pumpgas]

You are both correct but here is what I have found to be the major difference: each N2O manufacturer has their own plate design and spray bar hole count so this will drastically effect jet size and volume that is needed to increase the fuel. For my engine and money I will be going with a full NX conversion plate kit.

[Sheep DoGG]

Ok after extensive conversation with NX they have done a lot of testing with E85 and N2O. I for 1 will be getting a conversion plate kit from them this week and they come with the plate, jets, tune ups for different fuel pressure. Oh and their systems are RWHP rated not FWHP like the others.

:lmao: I had to:doob:

[High Roller]

Solong as you dont go "over" the max jet that was with the kit you cant really do much wrong as far as flow goes. Your jet drives it until the orifice size goes over the total orifice size of the spray bar. Once above that jets no longer do anything.

IF you are going to use an exisitnig kit, just dont go over the max fuel jet that the kit comes with, adjust your ratios accordingly and you should be ok. Id play it safe until you are sure.

You are right though, more than likely we all wil be buying jets to get it right anyway....

I will have to go a bit fatter than 30% to put the small n20 jet in it and use jets in the kit. BUT I can ofset the flow by dropping pressure a tad. Easily calculated to lower flow by using pressure.

I think any way we go we should be ok, but start off safe.

[pumpgas]

:lmao: I had to:doob:

You need your daily hug?? All you have to do is call and I'll swing by the shop and hook ya up....................:think:

[High Roller]

Hey I took my chart off. The carb jetting made me question things. It looks as if we all have went up almost 50% in carb jet orifice (using dril dia.), so why wouldnt you do so in the fuel jet of the n20 system?

If you carry that percentage over then you should go up 16-23 jet sizes on a cheater type kit.......hmmmm. Sounds like alot....