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answered Which cars are more comfortable?
Jul
1
answered 2006 Infiniti G35 - Blown engine following Kwik Kar engine flush
Jul
1
comment fuel consumption
The page you linked to explains exactly what I'm saying: engines don't run at the optimal air/fuel ratio at all times. They are detuned to provide a margin for error. Taking the car for a software tune will bring the maps closer to optimal based on the fuel in the car. This involves leaning out the mix slightly and setting a more aggressive timing advance, both of which produce greater power AND better economy because you're working closer to the optimal threshold without exceeding it.
Jul
1
answered Does limiting the use of a vehicle's turbocharger improve fuel economy?
Jul
1
comment fuel consumption
I mean both. Fuel economy is the obvious one, but under WOT, cars are tuned to run slightly richer than they have to for reasons of safety and homologation. E.g. my Subaru has the Australian 98RON map on it, but it's so conservative that it runs perfectly fine on our 95RON South African fuel. There is a large margin for fine tuning which will gain a lot of performance for 98, but render you incapable of filling up with 95.
Jun
30
comment Infamous WRX/XT overheating problem
This is my first thought too. I am just so careful because I KNOW these cars are fragile and I'm still paying back the previous HG repair bill.
Jun
30
comment fuel consumption
A leaner ratio does in fact give greater performance. The problem with that is that leaner means more prone to knocking. A perfect petrol would be able to run at 14.7:1 under WOT, but because the extra heat produces knock, you have to inject extra to cool down the combustion and bring down EGT's. Manufacturers leave a wide margin for error, which you can fine tune based on how lucky you feel.
Jun
30
comment Infamous WRX/XT overheating problem
Mechanical. It looks like a tweeter with a spring at the back :P
Jun
30
asked Infamous WRX/XT overheating problem
Jun
30
comment Is it difficult to retrofit Air Conditioning?
No, it's a straight swop. It's not that hard. It's just a lot of little jobs that need doing, e.g. the new belt, new buttons, wiring, mounting, ducting, etc. If you know what you're doing, you'll be able to pull it off in a day or so.
Jun
30
answered Is it difficult to retrofit Air Conditioning?
Jun
26
comment ESP warning light on
Voltage meter. Always check whether a device CAN communicate first.
Jun
25
comment Rim/tire two wrongs make a right?
All that flies out the window for the drive axle, and especially so if you've got a 4wd. One of the reasons my next car is going to be a FWD again. I like my Subaru and all, but even a slightly deflated wheel can do expensive damage to the center differential (aka the "viscous coupling"). I don't need that drama in my life.
Jun
25
comment Rim/tire two wrongs make a right?
If it's on the non-driving axle, don't even sweat it. It's well within the tolerance level of the drive differential at any rate, but non-driving wheels are pretty liberal when it comes to differences in diameter. As long as one of the wheels isn't comically over-or undersized (e.g. an SUV wheel on one side and a Korean econobox wheel on the other) you won't have any problems.
Jun
25
comment Long term storage of parts
I just did. ...
Jun
22
comment what is difference between DOHC and SOHC?
The VW Golf and Audi A3, as well as some Toyotas have 5 valves per cylinder in some models. The point was to not confuse the poor man with lots of exceptions and numbers.
Jun
22
comment Wheel offset effect on performance
As I understood it, the OP was using the word "offset", but describing ride height.
Jun
22
revised Wheel offset effect on performance
added 84 characters in body
Jun
22
answered Wheel offset effect on performance
Jun
22
answered what is difference between DOHC and SOHC?