performance down...or summer heat?

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Old Jul 20, 2007 | 08:57 PM
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Default performance down...or summer heat?

My car used to trap in the 1/8 of a mile anywhere from high 85's to 87 MPH, but now I can barely break 84. I have headers, ory, slp catback, 4.10 gears, ls6 intake, ported throttle body and a lid... Almost all the bolt ons...

I was wondering how much the summer heat affects a car's performance, it feels a bit sluggish down low, but I've changed the o2 sensors, plugs, wires, fuel filter, and just did an over all tune up...

The car recently threw a p0171 code, which made me think that the tune might be a little off...
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Old Jul 20, 2007 | 09:38 PM
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Summer heat is a killer. Mine runs 11.2-.3x's @ 122-123 in good air but in this weather it is down in the 11.5x's@ 120-121. I also lose about .05-.10 just in 60ft. So I'd say it's just the heat robbing some power from you
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Old Jul 21, 2007 | 10:47 AM
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Summer heat will kill your times and mph. I'd bet your times/mph will be back with cooler weather.

David
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Old Jul 21, 2007 | 12:48 PM
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The last time I was at the track, I took a mini poll and asked several people how their performance compared to runs in cooler temps. Almost everyone I asked said their times were off by .3 to .5.
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Old Jul 21, 2007 | 01:03 PM
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i was wondering the same thing.
i went to the track last night [1/8 mile] and it was hot and humid and i used to run around 8.6's@86 in the 1/8 and last night with the adition of some nittos and an ajustable ta i only ran an 8.7@83mph.
so i think the heat has a lot to do with it.
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Old Jul 22, 2007 | 10:16 AM
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I'm not going back in the summer
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Old Jul 22, 2007 | 02:47 PM
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Originally Posted by shaun
i was wondering the same thing.
i went to the track last night [1/8 mile] and it was hot and humid and i used to run around 8.6's@86 in the 1/8 and last night with the adition of some nittos and an ajustable ta i only ran an 8.7@83mph.
so i think the heat has a lot to do with it.
I'm in the same boat!
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Old Jul 22, 2007 | 07:34 PM
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Originally Posted by DaGeneral
I'm not going back in the summer
Ahhh come on now, don't turn in to a timeslip racer. Get in on some bracket racing and bring you some money and trophies home. Nothing better than making those real racecar guys feel bad when you put it on em in your street car
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