motohd66
Pro
hey just wondering if anyone using a wideband o2 sensor for tuning in the nitrous and if you are i was wondering what mix you guys were running. i know where i want to be stock but i was just wondering how much different it should be on spray or if there isnt any difference. thanks for all help.
brent
brent
motohd66
Pro
thanks that is exactll what i was looking for!!
87gtNOS
VIP Member
- Joined
- Nov 30, 2005
- Messages
- 1,892
- Age
- 50
- Location
- Toronto
- Country
- Canada
- Snowmobile
- 12 Apex XTX MCX powered
HAMMER said:
That's a good link HAMMER!!
However, a few things to note (in regards to the HOLTZMAN kit that motohd66 has) about those 7 variables that are listed!!
1. bottle pressure <<don't matter, Holtzman HITS hard everytime!
2. air/fuel ratio << well, mine ran 11 to 1....didn't affect it.
3. distance from the solenoids to the jets <<don't matter
4. ignition timing << Apex pulls timing from 10700 up, rev it 11000!!
5. fuel pressure << don't matter, lots there!
6. nitrous jets << don't matter
7. fuel jets << not a factor either!!
Now, everyone is wondering why I would say all this? Why? Because my tachometer doesn't lie!! 10200 on the motor, 11000 while spraying. Simple tuning!!
11000 rpm any given day, run after run, full bottle, or 1/4 full bottle, hot or cold!! Outside temps at 5c or -20c!!! SAME rpm!!
That's what makes the HOLTZMAN stuff so easy for the consumer...no need to read up on all this extra stuff!
Now, like myself, HAMMER, we all want to learn more, so reading your link is a great idea!!!
motohd66, get a wideband of your choice. Run the sled on the motor, should be mid 12's. Set up the fuel screw as per Holtzman instructions. Run the sled, A/F should be in the 10's. Lean it out some if you wish!
Most of all, have fun!!
motohd66
Pro
i actually have a boss system. i was told to run my engine at about 13:1. as far as pressures go, a boss system only runs at 240psi so that stuff doesnt matter too much anyway unless i am running when its below zero. i put a dyno tech sensor in mine and it seems to be working good so far.
87gtNOS
VIP Member
- Joined
- Nov 30, 2005
- Messages
- 1,892
- Age
- 50
- Location
- Toronto
- Country
- Canada
- Snowmobile
- 12 Apex XTX MCX powered
motohd66 said:
Ah Shoot, sorry mixed you up with someone else!!!
motohd66
Pro
ah its ok, thanks for the extra info though. i rode yesterday and the richest i could make my sled run at was about 12/1. anything more than that it just blubbered. i got it pulling and running pretty good around 13/1 so we are going up to the u.p. tomorrow so i will see how good it works up there.
RX1LARRY
Extreme
Can anyone explain to me how the nx transducer and a bottle heater can maintain pressure. When a run last 5 seconds or less racing I dont understand how that little bottle heater can do anything in the winter in that short of a run. Not sure what the transducer does.
FASTSLED
Pro
rx1 larry
how light did your new nos sled come in at under 400 lbs is it a 136" nice looking fast....
how light did your new nos sled come in at under 400 lbs is it a 136" nice looking fast....
RX1LARRY
Extreme
Lets just say its light, its 144", can't wait to get on ice
stoutner
TY 4 Stroke Junkie
RX1LARRY said:
Larry,
I'm not sure what transducer you are talking about. On my Boondocker system, it has a pressure transducer. When running a Boondocker unregulated system, the transducer reads bottle pressure and adjusts fuel through the injectors accordingly. Thereby maintaining the same A/F ratio regardless of what bottle pressure is. As bottle pressure drops, so does added fuel.
On my new system with the adjustable regulator and larger orifices, the transducer does the same thing. It reads N2O pressure and reduces or increases added fuel in order to maintain proper A/F ratio. My transducer goes into my fuel controller.
Maybe the transducer that you are talking about acts as a switch like a thermostat. It sees low pressure and turns on the heater???
1CrazySledder
Lifetime Member
- Joined
- Aug 11, 2005
- Messages
- 2,006
- Location
- Cartersville, GA.
- Country
- USA
- Snowmobile
- None, looking now!
motohd66,
Please take a moment to update your profile with your location as this is a site requirement.
Thank you,
-1CS
Please take a moment to update your profile with your location as this is a site requirement.
Thank you,
-1CS
Blown14psi
Pro
RX1LARRY said:
Is this what you are referring too?
http://www.shopatron.com/product/part_n ... 9418.0.0.0
This "transducer" is a pressure activated switch. It closes at approx 850psi and opens at 900psi and, I believe, is an adjustable variety. It is wired in series with the bottle heater relay to activate the heater based on bottle pressure.
NX recommends bottle pressure between 850 and 950 psi for maximum nitrous and fuel mixture.
It doesn't matter what system you have you are going to see bottle pressure drop off, when you spray which will result in hp drop off, especially with the little bottles that we all use.
When I spray I see about 950psi and after 10 sec it drops to around 800 which is still good for HP. You will just be running a little rich which is a good thing especially towards the end of your run when your engine see's the greatest load.
Attachments
RX1LARRY
Extreme
Yes that is the transducer and thats kinda what I thought, so in a 5 second or less run the bottle heater and transducer would be of no help?
Blown14psi
Pro
RX1LARRY said:
Exactly but you would need the bottle heater to increase bottle pressure between runs, or when you are off the nitrous cruising down the trail.
Since it is pressure activated, I turn my heater on when I start sleding in the morning and off when I run out of N2O.
