Originally Posted by EuroCarFan' post='1047660' date='Nov 5 2009, 01:06 AM

I'm commenting based on my recollection of what Eloy at RPI told me. It's a misconception for people to think that just because it's colder now or colder where they live that the aFe would work better. Regardless of what the temp is outside, your temp in the engine bay is a lot hotter so the aFe is still sucking in hotter air than what's available outside. A stock airbox would have colder air so it'll still be more beneficial. Example, if it's 50 degrees outside but 80 degrees under the hood, a stock airbox is probably getting the 50 degrees air while the aFe is getting the 80 degrees air. If you it's warmer outside, it'll just be incrementally warmer under the hood.

In your situation, you're probably making more power with the aFe compared to how it was in the summer but not compared to using a stock box, or a stock box with the RPI scoops.

As for the Singh tune, I believe most software accounts for intake air flow and allows the ECU to supply the right amount of fuel to maximize power.

Originally Posted by bimmer530iguy' post='1047680' date='Nov 4 2009, 10:25 PM

Thanks for the clarification Tony, I know that makes sense that since the stock air box is enclosed it will be sucking cold air from the outside, especially with the rpi scoop and drop in K&N filter. However, I noticed that in the winter with the AFE intake the car felt faster, I don't know why but my rpms would rev up faster and my car pulled harder in the mid-range to top end rpm levels. I also noticed that the rpi scoop also helped a little bit in shoving cold air to the AFE. In the summer however I felt a substantial loss in power with the AFE intake and put my stock airbox back in. I know this is all subjective but I can really feel a difference with the AFE during the winter. Once I get the tune tomorrow I'll swap the air box with the AFE to see if the tune will help the AFE at all, and I will report back whether I notice any difference in power with the AFE over the Stock box with the K&N filter.

Originally Posted by EuroCarFan' post='1047687' date='Nov 5 2009, 01:30 AM

To clarify, in the winter, you notice the aFe felt faster compared to having the stock box in the winter as well or compared to when you had the aFe in the summer? There's a difference in what you're comparing.

Originally Posted by EuroCarFan' post='1047382' date='Nov 4 2009, 08:34 PM

I can definitely ask Jags if he's willing to do other regions.

BTW, I made a mistake on the pricing for the 535 above. It's actually $1395.

Originally Posted by bimmer530iguy' post='1047680' date='Nov 4 2009, 11:25 PM

Thanks for the clarification Tony, I know that makes sense that since the stock air box is enclosed it will be sucking cold air from the outside, especially with the rpi scoop and drop in K&N filter. However, I noticed that in the winter with the AFE intake the car felt faster, I don't know why but my rpms would rev up faster and my car pulled harder in the mid-range to top end rpm levels. I also noticed that the rpi scoop also helped a little bit in shoving cold air to the AFE. In the summer however I felt a substantial loss in power with the AFE intake and put my stock airbox back in. I know this is all subjective but I can really feel a difference with the AFE during the winter. Once I get the tune tomorrow I'll swap the air box with the AFE to see if the tune will help the AFE at all, and I will report back whether I notice any difference in power with the AFE over the Stock box with the K&N filter.

Originally Posted by EuroCarFan' post='1048560' date='Nov 6 2009, 12:31 AM

No one interested in this??

Originally Posted by ESexy' post='1048936' date='Nov 6 2009, 10:34 AM

I'm actually very intrested if the tune is 550 for the 545

Originally Posted by top6491' post='1049041' date='Nov 6 2009, 12:50 PM

How about a test day in SoCal, say Orange county, so those of us from San Diego and LA can see for ourselves. I'm interested in a 545 tune myself.