- Dec 6, 2004
- 1,865
- 24
- 58
Ok, so lets knock this out.
Almost every time someone brings up nitrous, someone replies with "it will be fine as long as you have a good tune".
Nitrous tunes pull timing and richen the fuel curve, correct? Not much else to do I expect.
What about when a company recommends running the stock tune (stock timing, fuel curves) and just using premium fuel (93 octane, lets say).
Is there then a reason to get a nitrous tune?
If you think about it, and this is pertaining to WET kits (dry kits are a different story all together), wet kits are jetted on the rich side, ensuring that you have enough fuel while you are spraying so that on a motor that is healthy, and getting proper fuel (pressure, clean lines/injectors, proper working order fuel pump), wont go lean while you are spraying.
Unless you are already having lean problems, do you really need to tune the fuel curves?
Timing: The rule of thumb is said to be pull 2* of timing for every 50 horsepower when spraying. So for a 100 shot (very common for us Stangers), you would pull 4*. Yet most companies recommend running STOCK timing. No advance, no retard.
While retarding the timing certainly can't hurt from a safety aspect, it does cost a small amount of power.
Once again, to tune, or not to tune? Obviously, if you are running any kind of chip, tuner, or custom tune in which the timing has been advanced, it MUST be retarded to at least the stock level.
So first my question is this: What is special about a nitrous tune? I am assuming it's just retarding the timing, and richening the fuel curves.
My next question is this: I have a Diablosport Predator, running a canned tune from what I believe is RPM Outlet (I didn't buy it new, but the receipt shows RPM Outlet).
If a nitrous tune is just timing and fuel, could I not just back the timing down with my Diablosport (after figuring out what settings are factory timing, could be done through datalogging I suppose), and richen the fuel curves, and basically have a nitrous tune?
Any insight is appreciated... hopefully this will help those contemplating getting a kit, those who have a kit awaiting to be installed (me!!!
), and those who are already spraying but may want to tweak their tunes.
Almost every time someone brings up nitrous, someone replies with "it will be fine as long as you have a good tune".
Nitrous tunes pull timing and richen the fuel curve, correct? Not much else to do I expect.
What about when a company recommends running the stock tune (stock timing, fuel curves) and just using premium fuel (93 octane, lets say).
Is there then a reason to get a nitrous tune?
If you think about it, and this is pertaining to WET kits (dry kits are a different story all together), wet kits are jetted on the rich side, ensuring that you have enough fuel while you are spraying so that on a motor that is healthy, and getting proper fuel (pressure, clean lines/injectors, proper working order fuel pump), wont go lean while you are spraying.
Unless you are already having lean problems, do you really need to tune the fuel curves?
Timing: The rule of thumb is said to be pull 2* of timing for every 50 horsepower when spraying. So for a 100 shot (very common for us Stangers), you would pull 4*. Yet most companies recommend running STOCK timing. No advance, no retard.
While retarding the timing certainly can't hurt from a safety aspect, it does cost a small amount of power.
Once again, to tune, or not to tune? Obviously, if you are running any kind of chip, tuner, or custom tune in which the timing has been advanced, it MUST be retarded to at least the stock level.
So first my question is this: What is special about a nitrous tune? I am assuming it's just retarding the timing, and richening the fuel curves.
My next question is this: I have a Diablosport Predator, running a canned tune from what I believe is RPM Outlet (I didn't buy it new, but the receipt shows RPM Outlet).
If a nitrous tune is just timing and fuel, could I not just back the timing down with my Diablosport (after figuring out what settings are factory timing, could be done through datalogging I suppose), and richen the fuel curves, and basically have a nitrous tune?
Any insight is appreciated... hopefully this will help those contemplating getting a kit, those who have a kit awaiting to be installed (me!!!
), and those who are already spraying but may want to tweak their tunes.
