[cajunzl1]

Just got my HP Tuners working on my ZL1. Question to data log Boost, since the car reads boost now, can I just select the Boost/Vacuum channel to data log Boost only or do I have to do math with the Baro sensor??

I do see boost when recording but I don't see vacuum

Thanks

[JANNETTYRACING]

Originally Posted by cajunzl1

Just got my HP Tuners working on my ZL1. Question to data log Boost, since the car reads boost now, can I just select the Boost/Vacuum channel to data log Boost only or do I have to do math with the Baro sensor??

I do see boost when recording but I don't see vacuum

Thanks

You are logging Manifold Absolute Pressure in Kpa or PSIA.

This is different than Gauge Pressure which starts ate 14.7 PSIA which is Zero on the Gauge.

Gauge pressure is only accurate at Sea Level since that is the baseline it uses as Zero.

So log Barometric Pressure, then subtract this number from manifold absolute pressure and you will know what pressure above atmosphere you have.

Ted.

[cajunzl1]

thanks Ted!

[cajunzl1]

Ted
when you have cars on your dyno , where do sample the AFR on the exhaust system ?

[JANNETTYRACING]

Originally Posted by cajunzl1

Ted
when you have cars on your dyno , where do sample the AFR on the exhaust system ?

We weld an O2 bung in the pipe before the cats.

[cajunzl1]

thanks, seems like the passenger side may be a good location...

[JANNETTYRACING]

Originally Posted by cajunzl1

thanks, seems like the passenger side may be a good location...

Either side is fine but we always do the drivers side.

Ted.

[cajunzl1]

Thanks for the replies!!