PCV work well with elevation changes??

Emdog · #1 12-26-2012, 01:57 PM

I am considering the PCV when i decat my header. I am currently runnin CVO cans with Fullsac 2" power cores, SS ventilator ac, and xieds on my 12 fltrx. I routinely go from 500' elevation to 5000' and back on rides. My question is will the PCV handle the elevation changes very well? I guess i thought the O2 sensors helped with that kind of thing? Thanks for any advice. I guess i should add i dont plan on any engine upgrades and do not have a good dyno tuner closer than about 300 miles...
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tdkkart · #2 12-26-2012, 02:32 PM

Your factory EFI system's MAP(Manifold Absolute Pressure) sensor will take care of the change in altitude, with or without the PCV.

flightparamedic1 · #3 12-26-2012, 04:38 PM

Glad I read this post, I always learn new things on this forum.

Emdog · #4 12-26-2012, 05:16 PM

OK. Thanks TD. I figured the O2 sensors are there for a purpose and to bypass them seemed oldschool... I should just trust that Dynojet knows what they are doing

Flexin · #5 12-26-2012, 07:20 PM

Unless I got this wrong, if you have autotune you are fine, if you only have a PCV without autotune, this is a closed system, the O2 sensors are not connected under your seat. They may be in the bungs on the pipes, but not plugged into the ecm, so there is not adjustment. Which system do you have?

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Flexin · #6 12-26-2012, 08:48 PM

You either need an autotune system or use your stock ECM plus a dyno to dial it in. I believe these are the only systems that use the O2 sensors and make adjustments. Different manufactures have auto tune, Power commander and thundermax are two.

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Emdog · #7 12-26-2012, 10:27 PM

Thanks Flexn. I am considering the CobraFi2000R and the TTS also...both i believe utilize the O2 sensors. The PC-V seems to be the easiest to install but i was concerned that it doesnt make use of the O2s and i would end up losing power when riding at altitude. It sounds like that wont be an issue...

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Flexin · #8 12-26-2012, 10:35 PM

Not if you get autotune. I've had thundermax autotune on my vrod, it worked well but I moved onto a Roadglide before I put in different cams etc to take advantage. I'm not sure of the performance impact of that change in altitude, would be interested to hear how that works on a closed system.

Currently have PCV without autotune. I was not planning on major engine changes so selected what worked best for me. Good luck, I bet the change in altitude is beautiful...

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Emdog · #9 12-27-2012, 09:13 AM

Flexin... how are you liking the PC-V?? Thinkin with a canned map from Fuel Moto, its probably my best option for the money.

Flexin · #10 12-27-2012, 09:52 AM

Quote:

Originally Posted by Emdog

Flexin... how are you liking the PC-V?? Thinkin with a canned map from Fuel Moto, its probably my best option for the money.

The changes I made to my bike are on their list of maps so for me it works well. I have Rinehart xtream dual headers and 3.5 mufflers and high airflow filter. No problems at all. I've only been running this since it was cold. Will have to let you know this summer when the temps are in the 90's. I'm sure it will work fine.

Just think about what you may do in the future. If you get the start of a system that you can add autotune to and this fits your future upgrades, it can save you money in the long run.

Just thinking about it, you may consider a search on the forms for PCV problems, and see if someone had a problem with your configuration and what altitude they are at. PCV does not seem to have different maps for different areas of the country so someone should be running the same map that would apply to your bike.

For me, here in Michigan, no problems