please help! overboosting problem


GTSGOD
12-23-2006, 11:50 PM
hi pplz
thanks so far for your intel, i have another problem... ive tuned my car with the pfc and ebc but it was tuned on a hot day.. i took it out last night on a cold day, nailed it and there was boost spiking.. is this because ive tuned it on a hot day and the air is thicker? i turned the boost down and and its holding boost properly now. should i have another setting on my ebc for a hot day too?
hot day went to 13psi no probs, then on the cold day went to 14.7psi.. turned it down for the cold day and made 13psi again... im confused... sorry bout all this chit chat.

thanks guys :)

SkylineUSA
12-24-2006, 05:20 AM
hi pplz
thanks so far for your intel, i have another problem... ive tuned my car with the pfc and ebc but it was tuned on a hot day.. i took it out last night on a cold day, nailed it and there was boost spiking.. is this because ive tuned it on a hot day and the air is thicker? i turned the boost down and and its holding boost properly now. should i have another setting on my ebc for a hot day too?
hot day went to 13psi no probs, then on the cold day went to 14.7psi.. turned it down for the cold day and made 13psi again... im confused... sorry bout all this chit chat.

thanks guys :)

Dense air could make it spike, because you actually have more volume at the same psi, which will make the turbo spin a little quicker, how much? Not sure.

As for EBC, just change it for what you need.

GTSGOD
12-25-2006, 01:06 AM
should i lower the spool up rate on my ebc?... ive turned it up abit

SkylineUSA
12-25-2006, 01:16 AM
As long as it does not over boost, your golden.

EDTHEMANJP
12-28-2006, 12:18 AM
It is normal for the boost to be higher when the weather is colder, denser air. Yes you need to monitor and change your boost settings for different weather conditions.

Moisture is going to affect it to as is dryer air.

GTSGOD
01-03-2007, 07:29 AM
so therefore it feels like im getting more power cause it actually goes better in colder weather. my front bar is upgraded and my cooler sits behind an opening and u can see the cooler. would this help and how much power increase would this do considering i explained this front bar scenario? Also im curious how much 730nm of torque is atw to the flywheel.. does anyone know the precise calcs

thanks guys :)

mmcleo11
01-05-2007, 04:34 AM
I answered your torque question HERE (http://www.automotiveforums.com/vbulletin/showthread.php?t=653563&page=2)

Post up the dyno graph and I can tell you exactly how much torque you have at the flywheel. If you cannot post, catch me on MSN :)

GTSGOD
01-05-2007, 04:38 AM
whats your msn mate? private message it to me if u can :)
cheers

RazorGTR
01-05-2007, 08:36 AM
Another thing to keep in mine about temp changes. If you tune your car on a hot day, then later in the year when cool weather moves in you're AF ratio will also go out of wack. You could be running up to 3 pts leaner due to the air density difference. If you have a way to check that I would. This to me would also be a great consern, especially if you wind up +12 to 1 AF.

1.5 psi difference on boost shouldn't make you worried unless you've tuned your car to the edge on the hot day. 3psi would definately concern me though.

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