just some general questions i see some people asking and was wondering if anyone wanted to explain any answers.

1. why is it many say to retard the timing for lower horsepower ratings around 100?

2. why is it the hotter the plug the worst it is for the car?

3. why is it changing your fuel jet just a few numbers up or down can make a big difference in how much power you feel?

4. lastly why is NOS so fun?

 

1. A 100hp shot on a 350 using hi-octane pump gas at the correct fuel pressure
can use normal ignition timing 32-36 deg
total centrifical. When you get to very high
nitrous shots over 200. You will need higher octane fuel 110+. Cylinder pressure and burn rate really increase so ya don't need as much
timing lead to burn the nitrous/fuel/air mix
correctly. Additional timing retard helps avoid detonation (ping) which is BAD.

2. Just remember this: hot cylinder- coldplug
cold cylinder- hot plug and ya can't go wrong. When your put-putting around town
at low speed your cylinders are relatively cool so ya need a hot plug(retains heat) to avoid carbon build up. When ya got your foot in it. You're burning more fuel, things heat up. Now ya need a cooler plug. When you're
using extra nitrous/fuel. at WOT your burning even more fuel now. So ya need a cooler than stock plug.

3. The fuel makes the power not the nitrous
more fuel/more power, pretty simple.
The fuel does need the correct mix of nitrous to burn thou. If you mix too much fuel, power goes down cause things cool off
(Rich). Too little fuel, power goes up at first but things got too hot! (lean) Bad!! Repeat after me: LEAN BAAAD!! When on the juice a slightly rich mix (extra fuel) helps cool the big fire and keep ya out of trouble.

4. Dollar for dollar It's about as much fun as you can have in a car and not get wet... http://photos.yahoo.com/russ_q



[This message has been edited by F-BIRD'88 (edited October 26, 2001).]

 

that sums it up pretty well.

anyone know what a good air/fuel ratio would be when on and off the N2O?

is their another way people check to see if their running rich or lean? if so what would be the best way?

 

If you mean the air/fuel ratio for your carb
at WOT, It should be the same with N2O
as without. Usually between 12:1 to 13:1.
The nitrous/fuel ratio is separate. In other words don't try to tune your nitrous
motor by changing jets in the carb. Two other good ways to see what the air fuel mixture is are checking the color/condition
of the plugs and reading exhaust temperature
in the header near the exhaust port.

 

well, i'm using fuel injection on my tuneport; but i kinda get what your saying.