Can't seem to find the information that I am looking for, so....

Just wondering if your car is tuned for winter, what sort of power differences are you looking at once temperatures start changing? I realize every car and setup is different, but just wondering if there is some sort of "1% per 10 Degrees" relationship


Seems like since my car was tuned (when it was 30 degrees all the time) and now (50-70 degrees) my car seems a lot slower and so I want to get it back up to about where it was when it was 30 degrees

 

it really shouldn't matter that much. the thermodynamic properties of air do not change significantly enough ( >1%) at the operating ranges of your car. Have you changed anything else recently?

 

Well, I put in BC 272 cams and got it tuned, it ran awesome for like maybe 4 days, after that it didn't seem nearly as fast. I don't know why, I have been logging and everything seems to be good, I have checked almost EVERYTHING that I can think of. There was a vaccum line that came off the EGR (it was the one on the right side) I put that back on and it seems to idle better, but still not as fast. The exhaust manifold started turning white, and plugs were a little white too (so, I would say that it has been running a little hot) but no knock, at least very little anyways, and usually didn't happen much. I thought it may be the gas so I started getting 93 oct. Shell V-Power, less knock but still slow. I am going to clean the throttle body today, really black and sticks a little, but I don't think that is it either. The only other thing that I can think of is I got bad gas, the vaccum line on the EGR came off caused the engine to run hot, and cracked the exhaust manifold. I just haven't taken it off yet to see if that is what the problem is...

 

I personally notice a major difference between temps. I live in TX and one day it'll be in the 40's the next the 70's and you can tell the difference a lot. I'm not a tuner... but think of your intake charge fighting against air coming in that's 30 degrees cooler. Makes sense to me you would be making a lot more power.

Unfortunately I don't think there's anything that can be done. Get a bigger FMIC move to Canada?

 

Well thats what I mean, the only real difference that I can tell that happened from when my car went from running good to bad was when it started heating up my 20-30 degrees.

Although, I did not notice that the actual intake temps rose that much, only a few degrees. So I don't know...