air intake temperature and the effects on performance
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air intake temperature and the effects on performance
I was wondering how bad the intake air temperature effects the performance of the engine. I ran a 8.95 in the 1/8th mile (high 13 second 1/4 mile), when the ambient temperature was 65 degrees (IAT showing about 75-80 degrees) and at that I didn't have traction (didn't have posi traction installed). Just today, I ran again, with posi traction. This time the temperature outside was 95 degrees (putting the IAT at about 120 degrees the whole run). I couldn't do better than a 10 second 1/8th mile (mid 15 second 1/4 mile)
Just wanted to get everyone's take on how the temperature outside effects the performance of a turbo charged engine
Just wanted to get everyone's take on how the temperature outside effects the performance of a turbo charged engine
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I can definitely feel a difference when it gets hot. Doing the math with PV=nRT, you get 8% less air mass with an increase from 75 to 120 IAT, so you can see its a decent amount. Also, if your IAT table is aggressive it will pull timing once things heat up so that will reduce power too.
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I'm keeping track of the IAT's using an aeroforce interceptor. It was nelson tuned back when I didn't have an intercooler (and I told him that). I'm not sure what he did as far as IAT tables, but the past couple times I went to the track I've had the intercooler on (the time I went 8.95 and just yesterday the really slow time). I'm still waiting on the new nelson tune. I was planning on getting them to tune it in person, but every time I call it seems like they are closed
The CEL is on, but the engine will idle rough about once a day for about 10 seconds causing the CEL to come on throwing P0171 and P0174 (lean codes)
The CEL is on, but the engine will idle rough about once a day for about 10 seconds causing the CEL to come on throwing P0171 and P0174 (lean codes)
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i know when ever i get a retune from nelson it always seems like it has a learning curve to it or somethin. The more u drive the truck the better the tune becomes. Does he do this, so his tune can kinda learn the truck since he is tuning kinda blind? Just curious.
I didnt know the air temp could affect perfromance that much. I guess u learn somethin new everyday. Have u relocated your iat closer to the intake mani. away from all that heat yet? they say that helps, i planned on doin this to mine.
I didnt know the air temp could affect perfromance that much. I guess u learn somethin new everyday. Have u relocated your iat closer to the intake mani. away from all that heat yet? they say that helps, i planned on doin this to mine.
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i know when ever i get a retune from nelson it always seems like it has a learning curve to it or somethin. The more u drive the truck the better the tune becomes. Does he do this, so his tune can kinda learn the truck since he is tuning kinda blind? Just curious.
I didnt know the air temp could affect perfromance that much. I guess u learn somethin new everyday. Have u relocated your iat closer to the intake mani. away from all that heat yet? they say that helps, i planned on doin this to mine.
I didnt know the air temp could affect perfromance that much. I guess u learn somethin new everyday. Have u relocated your iat closer to the intake mani. away from all that heat yet? they say that helps, i planned on doin this to mine.