ISF Slower in hot weather - heat soak?
04-16-11 | 04:41 PM
#1
ISF Slower in hot weather - heat soak?
Warm weather in Southern CA today, car temp gauge read 91F compared to 70F earlier this week.
I have noticed that the ISF's power is noticeably diminished when the weather turns warm/hot. Compared to "winter" over here, where temps hit a high of 40-55F. Today, I attempted a few full throttle acceleration runs after driving for 30min and I know that it's just not as "powerful" and felt sluggish. Sure, it's still quick, but just not as quick as during winter.
Parked it in a covered garage with a fan blowing the air out, drove the ISF back out the power was back for about 20min.
Does removing the engine cover help with what I presume is heat soak? Anyone else notice less performance when warm weather comes?
2008 ISF, stock except for JoeZ intake tube.
I have noticed that the ISF's power is noticeably diminished when the weather turns warm/hot. Compared to "winter" over here, where temps hit a high of 40-55F. Today, I attempted a few full throttle acceleration runs after driving for 30min and I know that it's just not as "powerful" and felt sluggish. Sure, it's still quick, but just not as quick as during winter.
Parked it in a covered garage with a fan blowing the air out, drove the ISF back out the power was back for about 20min.
Does removing the engine cover help with what I presume is heat soak? Anyone else notice less performance when warm weather comes?
2008 ISF, stock except for JoeZ intake tube.
04-16-11 | 04:57 PM
#3
Lexus Fanatic
Joined: Jul 2009
Posts: 5,595
Likes: 60
From: CA
I don't know if it's slower, but I as a driver feel more fatigued in hotter temps like today, which can attribute to that feeling of the car being slower- maybe. Surely after a nice drive for the day, it can get pretty hot under the hood. I've been tempted to remove the engine cover, but after seeing what it looks like without it, I prefer the look of it on where everything is concealed properly.
04-16-11 | 05:16 PM
#4
Driver
Joined: Mar 2010
Posts: 141
Likes: 0
From: CA
Warm weather in Southern CA today, car temp gauge read 91F compared to 70F earlier this week.
I have noticed that the ISF's power is noticeably diminished when the weather turns warm/hot. Compared to "winter" over here, where temps hit a high of 40-55F. Today, I attempted a few full throttle acceleration runs after driving for 30min and I know that it's just not as "powerful" and felt sluggish. Sure, it's still quick, but just not as quick as during winter.
Parked it in a covered garage with a fan blowing the air out, drove the ISF back out the power was back for about 20min.
Does removing the engine cover help with what I presume is heat soak? Anyone else notice less performance when warm weather comes?
2008 ISF, stock except for JoeZ intake tube.
I have noticed that the ISF's power is noticeably diminished when the weather turns warm/hot. Compared to "winter" over here, where temps hit a high of 40-55F. Today, I attempted a few full throttle acceleration runs after driving for 30min and I know that it's just not as "powerful" and felt sluggish. Sure, it's still quick, but just not as quick as during winter.
Parked it in a covered garage with a fan blowing the air out, drove the ISF back out the power was back for about 20min.
Does removing the engine cover help with what I presume is heat soak? Anyone else notice less performance when warm weather comes?
2008 ISF, stock except for JoeZ intake tube.
I don't know if it's slower, but I as a driver feel more fatigued in hotter temps like today, which can attribute to that feeling of the car being slower- maybe. Surely after a nice drive for the day, it can get pretty hot under the hood. I've been tempted to remove the engine cover, but after seeing what it looks like without it, I prefer the look of it on where everything is concealed properly.
.
04-16-11 | 08:13 PM
#7
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From: NY
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04-17-11 | 09:32 AM
#11
Driver School Candidate
Joined: Mar 2010
Posts: 24
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From: ct
04-17-11 | 10:09 PM
#15
Strange. I didn't notice a significant drop in power when I ran my track weekend at CMP in 102F heat. Oil temps went to one bar short of the top, but power didn't seem to suffer any more than I would expect from running in genuinely hot weather.