Time to retune the cars

[1fastlaser]

Winter gas is more oxygenated then summer gas,aka more prone to detonating!!!!They switch it over for the winter time

http://www.chevron.com/products/PRODSERV/fuels/bulletin/oxy-fuel/realwrld.shtml

 

[overdoseheroin]

pretty sick info..no wonder i cant get a good tune on my car.

 

[TSIfreek]

Yea I am having the same problems I am runnning way lean I had to low my boost and up the FP. My EGTs are lower though for some reason I only hit 1475- 1500 now with the cold weather and the winter fuel? More oxygen in the fuel would mean a higher EGT temp though??? I am also getting slighly more knock as well.

 

[pickens]

wow...good find.

 

[1fastlaser]

Yea I am having the same problems I am runnning way lean I had to low my boost and up the FP. My EGTs are lower though for some reason I only hit 1475- 1500 now with the cold weather and the winter fuel? More oxygen in the fuel would mean a higher EGT temp though??? I am also getting slighly more knock as well.

egt is related to timing,so you cant completly base egt off lean or rich

 

[TSIfreek]

My base timing hasnt changed from summer still at 5*

 

[JiggahMan]

I thought this was common knowledge.. Maybe just for the hardcore tuners.

 

[overdoseheroin]

I thought this was common knowledge.. Maybe just for the hardcore tuners.

ya cuz im sure your the most hardcore of them all.

 

[JiggahMan]

ya cuz im sure your the most hardcore of them all.

You obviously took that the wrong way, just like 90% of the pueriles that read it did. So, let me explain it in a way that you may understand what I meant.

Anyone that has done their research about tuning should know this. This is why I don't use gas with that crap period. You don't know how much ethynol they put in there, so every time you switch gas stations you get a different amount. I go to the same two gas stations every time.

 

[TSIfreek]

Very good point JIGG. What gas has worked out best?? Im thinking Shell or BP (amaco)

 

[JiggahMan]

Those are exactly the two I go to. And I physically only go to the two also. I don't just go to any Shell or any BP. It's always the same two. I chose BP and Shell simply because I know people who work there and other gas stations. I've heard stories of the used water from the carwashes leaking into the gas at Holiday, and SA I plain old knock like crazy. Pretty much it's up to you guys to find out which gas works best in your area. Good luck.

 

[Talesin]

Oxygenating the fuel... making it more knock-prone... in winter. Does it seem ass-backward to anyone else to get WORSE fuel during the time of year that you'll get the coldest intake temperatures and best IC effect? I can understand for places that get snow.. might just be unsafe. But in the valleys of Southern California?!

 

[overdoseheroin]

You obviously took that the wrong way, just like 90% of the pueriles that read it did. So, let me explain it in a way that you may understand what I meant.

Anyone that has done their research about tuning should know this. This is why I don't use gas with that crap period. You don't know how much ethynol they put in there, so every time you switch gas stations you get a different amount. I go to the same two gas stations every time.

in that sense...your right. it is common knowledge. i took your previous post the wrong way..understandably.

 

[jaredgsx]

Oxygenating the fuel... making it more knock-prone... in winter. Does it seem ass-backward to anyone else to get WORSE fuel during the time of year that you'll get the coldest intake temperatures and best IC effect? I can understand for places that get snow.. might just be unsafe. But in the valleys of Southern California?!

because god knows we hate having more oxygen getting into our combustion chambers

 

[1fastlaser]

yeah its mainly in winter climates.Its not a bad thing,but its a good thing to put the wideband back on and make sure its still inline.Winter time the cars always feel faster,well the gas makes the car run alittle leaner,and the air temp/humidity is alot less...so its allllll good

as they say leaners meaner!