I have a 97 GTP and I'm trying to do some tuning. I'm using HP tuners and I don't understand why it says my timing is always negative. The gauges,charts, and histogram all say negative. Whether I'm cruising or wot.
Why?
|
|
11-19-2014
I have a 97 GTP and I'm trying to do some tuning. I'm using HP tuners and I don't understand why it says my timing is always negative. The gauges,charts, and histogram all say negative. Whether I'm cruising or wot.
Why?
11-19-2014
Because it's a 97. All 97's read negative timing in HP Tuners, 98+ cars read it normal.
11-20-2014
So the vales are correct they just read in the negative?
Also why is it telling me at WOT running at 140kpa?? That's like 19psi
11-20-2014
Without knowing your mods..either you have a serious pressure issue or you have a bad sensor
11-20-2014
I'm running 9-10 psi on my autometer gauge. Def not 18 psi.
Does the 97 read funky on that too?
11-20-2014
Are you sure you are reading psi and not Hg? 20 would sure sound like Hg
11-20-2014
Anything above 100kpa is boost. Anything below is still vacuum. The sensor reads absolute pressure, not a pressure difference like a gauge does.
Easiest way to figure out how much boost you are running is just subtract 140-100=40. 40kpa is how Mich boost you actually have. Just remember, from the map, anything over 100kpa is boost, and anything under is vac.
11-20-2014
Ok got it. I just found that same thing on Wikipedia GTPpower. Thanks.
It said subtract 100 kPA and that is your number
11-20-2014
100kpa is only considered vacum with perfect atmospheric conditions and sea level elevation. Like for me in arizona after 86kpa id be in boost at my elevation and avg barometer readings.
| « Previous Thread | Next Thread » |
| Bookmarks |
Bookmarks |
