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bypass the coolant line at the TB?
Posted 16 September 2004 - 07:57 PM
Posted 17 September 2004 - 08:04 AM
The idea why it's there is not for emissions, but for cold weather people. Because it's supposed to "keep your throttle body from icing over" but the funny point is that if you live in a cold climate, the mere fact that you aren't driving your car, and it's stopped, and there's cold coolant in there is not going to stop your throttle body from icing over if it was going to without the coolant lines hooked up. Coolant in the TB is arbitrary to whether or not this would heppen... In my opinion, from talking to people who live in colder climates who have done this, (and yes, this is a fairly common thing to do with cars in general) is that it's only a restrictive device placed on engine performance. I can't understand why there should be any heating in that area anyhow.
And afterall, wouldn't having the maf sensor read the same temperature air that's going into the manifold be more accurate for fuel equations than if it were say 15 degrees hotter? And wouldn't you want your ECUs air intake temp sensor to match more closely the air coming in? (from what I understand, on the cars so equipped, it's before the TB)
btw - one person who had a turbo motor measured the difference. said the air intake charge changed about 15 degrees cooler. I'm not sure if it's the same or any different for us n/a guys, but, I know now I can touch my TB when it's completely warmed up and not have to worry about frying my hand! it used to be so hot I couldn't touch it for longer than a second.
Posted 17 September 2004 - 08:31 AM
If you live in colder climates, there is a possibility of the TB icing over if given the right temp and humidity.....it'd be pretty rare, however possible.
Posted 17 September 2004 - 07:44 PM
You're not really going to gain any hp from this....however throttle response will be better.
Agreed. I also noticed that it cut down on the pinging I used to have, which would make sense if the intake charge is slightly cooler...
Posted 18 September 2004 - 01:22 AM
Although, I would understand if this improved low engine speed throttle response, since there might be enough heat to affect the mass air flow in this condition. The easy solution of course is to keep the revs up!!
Posted 18 September 2004 - 08:52 AM
Posted 20 September 2004 - 05:31 AM
For best results across the board, there should be a thermostat that closes the line once the engine is warm.
I'm sure it probably helps reduce cool engine smog outputs as well.
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