10,621 reputation
31957
bio website stackoverflow.com/users/5812/…
location Rhode Island
age 46
visits member for 3 years, 4 months
seen 10 hours ago

Computer scientist working at [A Facility] developing [Systems] that [Do Stuff] at [Places].

Daily driver: 2004 Subaru Impreza WRX hatchback


Jun
25
comment How does cold, dry weather affect horsepower?
(Okay this is to not-Ellesedil): humid air and water injection are not the same thing. Water injection is still water droplets (small ones admittedly). They don't turn to water vapor (i.e., humidity) until evaporation or a phase change (if the air is at or near 100C) occur. That evaporation / phase change absorbs plenty of heat and reduces the temperature enough (benefit) that the increased humidity is offset (cost). Personally, I would rather keep my intercooler cool - that'll cool the air without bumping humidity.
Jun
25
comment How does cold, dry weather affect horsepower?
Page 179 of Maximum Boost by Corky Bell: "David Hobbs ... could feel a power loss when the sun came out from behind a cloud."
Jun
25
comment How to determine type of battery
I agree: this is largely a don't care for normal operations. The best reference might be the big book in the shop: look up your particular vehicle and they'll recommend a specific battery for you.
Jun
25
comment How does cold, dry weather affect horsepower?
You're almost certainly thinking of David Hobbs. Legend says that his butt dyno is so finely calibrated, he could detect the difference in horsepower resulting from driving through the shade.
Jun
19
comment Wheel change/balance leading to continuous braking
That might cause a change in braking but I would expect a secondary symptom of a crazy loud screech on braking.
Jun
19
comment My a/c goes in and out at random times. Help!
I think you're right: this sounds like the refrigerant has leaked down to a marginal level. The compressor is turning off right away because there's not enough for it to compress. Now, that said: if the refrigerant has leaked out, there's still a leak in the system that needs fixing. I was just reminded of that fact when I didn't replace the O-rings before recharging the system: chat.stackexchange.com/transcript/message/15399775#15399775
Jun
18
comment Golf mk3 TDI has pressure in the cooling system
@TomMacdonald, I might be completely off base. Hopefully, you'll find out the correct answer and tell us here.
Jun
18
comment Golf mk3 TDI has pressure in the cooling system
Just to clarify: when you say "pressure cap", you're talking about the cap on the radiator itself, right? We aren't discussing the expansion / overflow tank? That's the separate plastic container where the level raises and lowers based on the current temperature of the coolant.
Jun
18
comment Golf mk3 TDI has pressure in the cooling system
I find points one and two to be the most interesting. Does your car exchange heat between the oil and the coolant? E.g., on mine, the oil and coolant pass in close proximity in a heat exchanger. I'm wondering if you're seeing much higher coolant temperatures (and therefore pressures) than normal due to prolonged periods under boost.
Jun
16
comment What could make a noise when I decelerate with a manual gearbox?
@Paulster2, now turn it into an answer....
Jun
13
comment What could make a noise when I decelerate with a manual gearbox?
Your gear level question is interesting: have you tried damping the vibrations of the gear lever while the noise is occuring? If it's the gear lever, even the lightest torque will change the sound.
Jun
12
comment Gurgling sound from blow off valve at medium RPM
@Nick, exactly - in my case, the stock valve vents back into the intake. It's likely that I have a similar sound going on at some particular midrange RPM but I can't really hear it due to the muffling of the intake manifold.
Jun
12
comment Gurgling sound from blow off valve at medium RPM
As always, it's your car so you have to decide what to worry about. That said, I don't think you need to worry. Compressor surge could cause damage (given enough time). A burbling blow-off valve is likely just a quirk.
Jun
12
comment Audio player doesn't read some songs
This question appears to be off-topic because it is about an MP3-playing CD player. It's not clear that this has anything to do with this site.
Jun
9
comment Operating stick shift
This sort of question is off topic for the main site. However, it is welcome in the more open-ended chat room: chat.stackexchange.com/rooms/340/…
Jun
3
comment Malfunctioning air conditioner mystery - recharge makes car run worse
Do you have a pressure valve that you could use to check pressure in the system?
May
30
comment Oil leaking from spark plug socket
Going purely from the picture, it looks like you might not have leakage from the sparkplug socket. If you look carefully, it almost looks like something spilled into that area and ran to either side of the sparkplug. Did you spill some oil during the last change?
May
30
comment Can a head gasket leak cause the cat to plug?
"plugged cat had caused the problem of the blown head gasket" - wow. I didn't realize that that was even possible!
May
28
comment Do Pre-2000 Ford trucks have a less mechanically crowded workspace than a Post-2000 Ford truck?
You might want to clarify: are you asking if pre-2000 trucks are less cramped than post-2000?
May
28
comment A/C Does Not Continuously Blow Cold
Just for clarity, is this part of a climate control system? Are you setting a particular temperature that the AC computer is trying to reach? This would be unlike my car with its dial that's blue on one side and red on the other.