PC V Install question

[cannondale27]

Yes I would like to know also.

 

[machzrobbie]

Yup, understand it can't act like a wideband sensor but still not understanding the need to defeat it. Maybe Dave from Hurricane will see this and explain his thoughts for leaving it in?

Hurricane actually uses a PCV for a nytro, the Viper one disables the stock o2 adjustment, theory is it won't try and compensate for the adjustments you're making with the PCV. The target A/F for the stock map is probably leaner then you'd want with your tune. Hurricane's map works very well with his set up so I wouldn't worry about it either way.

 

[Chewy]

Hmm I wouldn't mind hearing from either hurricane or ulmer on this. But its sounds like it will be in my best interest to grab the autotune just to keep things safe

 

[machzrobbie]

Hmm I wouldn't mind hearing from either hurricane or ulmer on this. But its sounds like it will be in my best interest to grab the autotune just to keep things safe

I've been using power commander stuff for years - if you buy the PCV specifically for the Viper it will delete the stock O2 sensor, and use a "base" map in the stock ECU. When you adjust the PCV to adjust fuel the stock ECU will not try and compensate what you are trying to do. If you add the auto tune to the PCV you will make a target A/F map and the PCV will automatically "trim" your map to try and meet your A/F map - but will only adjust the map 20% at a time. You can then accept the "trim" numbers to your map and fine tune it. All the trim numbers are done at throttle position/rpm so when using with boosted applications you really have to know what you are doing to use it or you can really screw your fuel map up.

Hurricane built his turbo kit before the Viper PCV was developed and found the Nytro one worked just fine for what he was doing. I've talked to him about it and he's decided to stick with his set up because it works so well. I agree with him about his set up - it works very well.

 

[titanrcr]

Hurricane actually uses a PCV for a nytro, the Viper one disables the stock o2 adjustment, theory is it won't try and compensate for the adjustments you're making with the PCV. The target A/F for the stock map is probably leaner then you'd want with your tune. Hurricane's map works very well with his set up so I wouldn't worry about it either way.

Thanks for clarifying, now that you mention it I do recall the box for the PCV did say Nytro on it.

 

[tator]

just had mine in for the reverse actuator locking up. the dealer took a real good look at Daves kit, they are interested in getting a new vendor for their turbos. i told them to give it a good look over and they could run it too. they were real impressed with the kit, afr numbers, and mapping, yes they plugged it in to see. they did notice the fuel line pulling apart and did that recall as well. when they did that they must have pulled my stock o2 sensor wires out of the way and not put them back where i had them. i noticed when i made my under hood intake that the o2 sensor wire was on the exhaust, melted the outer sheath, i will cut it apart to make sure the coating on the wires is not gone. i will post my under hood intake pics soon. lowered intake temps 40 deg on average.

 

[HURRICANE]

I was in McBride British Columbia last April riding in the mountains while tuning the Hurricane Viper turbo kits.The trick was to make a map that worked as well at low elevation as it worked at 8500ft.One of the tools that I learned to use was the stock Viper 02 sensor.I would start the ride on the trail and in about 5 mins I could see on the wide band gauge the stock ECU correcting the tune .This is an example of why I prefer the Nytro PCV on the Viper.I like to keep the stock 02 working at moderate throttle to insure a perfect tune all the time

 

[titanrcr]

I was in McBride British Columbia last April riding in the mountains while tuning the Hurricane Viper turbo kits.The trick was to make a map that worked as well at low elevation as it worked at 8500ft.One of the tools that I learned to use was the stock Viper 02 sensor.I would start the ride on the trail and in about 5 mins I could see on the wide band gauge the stock ECU correcting the tune .This is an example of why I prefer the Nytro PCV on the Viper.I like to keep the stock 02 working at moderate throttle to insure a perfect tune all the time

Thanks for clarifying Dave, that makes perfect sense to me.

 

[cannondale27]

I was in McBride British Columbia last April riding in the mountains while tuning the Hurricane Viper turbo kits.The trick was to make a map that worked as well at low elevation as it worked at 8500ft.One of the tools that I learned to use was the stock Viper 02 sensor.I would start the ride on the trail and in about 5 mins I could see on the wide band gauge the stock ECU correcting the tune .This is an example of why I prefer the Nytro PCV on the Viper.I like to keep the stock 02 working at moderate throttle to insure a perfect tune all the time

Cant those of us with Viper PCV just hook the stock O2 back up? Should do same thing as long as AutoTune is off. Thanks for the info

 

[Chewy]

So with the autotune, you need to set the AFR values. Do they auto populate or do I need to manually enter them, and if I do what is the ideal target AFR for these motors? (I apologize for all the questions, just trying to learn before I start installing everything)

 

[cannondale27]

I have heard everything from 11:1 down to 13:1 or leaner for a NA. Right now mine is at 12.5-12.8 everywhere. Experimenting though with richer settings.

 

[Chewy]

Thanks cannondale, one final question and I should be ready to proceed, where did you connect the autotune module to power?

 

[cannondale27]

I dont use a AutoTune. AFR meter and manually write the map. If I remember right on quads we always hooked it up to batt power since if you shut the machine off you last tune session can be lost? We only used auto tune till good map was made and then removed it.

 

[MartyV]

I installed my pcv this fall pre programed by ulmer. It didnt come with the O2 optimizer on the parts list. I left the stock O2 installed and plugged in. Should I disconnect the O2, plug the bung, and install the dummy resistor on the end of the factory O2 wire? Non turbo sled.

 

[fasteddie15x]

I installed my pcv this fall pre programed by ulmer. It didnt come with the O2 optimizer on the parts list. I left the stock O2 installed and plugged in. Should I disconnect the O2, plug the bung, and install the dummy resistor on the end of the factory O2 wire? Non turbo sled.

The dummy resistor i believe is the optimizer! I also bought my PCV from ulmer and that resistor should be plugged into the harness that the original O2 sensor is plugged into