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Old 05-22-2018, 07:21 PM   #15
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Quote:
Originally Posted by Badmojo View Post
A10, Stock, PTM RACE, Launch Control 1700 RPM, 10% slip........factory tires.

DA +1770 feet (positive)

R/T 0.376
60' 1.725
330 4.829
1/8 7.329
MPH 99.46
1000' 9.471
1/4 11.272
MPH 125.02
Notes Cool down but warm LC 1700RPM ST 10%
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Old 05-22-2018, 09:02 PM   #16
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Originally Posted by DangerZL1 View Post
Great time!
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Old 05-23-2018, 07:28 AM   #17
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Quote:
Originally Posted by BlaqWhole View Post
Heat soak is real with any car. And the ZL1 is nothing compared to the HC and def not an issue compared to Mustangs. BTW, what exactly were your IATs that night?
funny you mention that because my friend has a hellcat. 2 weeks ago he ran 11.0's in 1800 DA letting it cool down, and this past weekend he ran MANY 11.0's and a 10.96 in really bad DA....all the while I was having really bad heat soak problems. we made a lot of the passes together or next in line, so passes and time of day were as consistant as they could have been

I have no way to read IAT's currently


settings were track or sport mode most of the day ( i used sport mode because track mode was not letting me do a burnout without the line lock). and before anyone gets triggered by that, it was so hot all I wanted to do was clean the tires in the heat of the day, getting them hot only made 60ft times worse.

center gauge was set to race, and 10% slip.



on a side note, I did place 1st loser in my class
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Old 05-23-2018, 10:15 AM   #18
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Ok well that was your problem IMO, not heat soak. In a Drag race, you want to be in Track mode, Race. Or just hold traction control down for 7 seconds and turn it all off completely. I haven't tried turning it all off, but plan to next time I'm out.

In sport mode the car didn't give you all the power.
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Old 05-23-2018, 11:24 AM   #19
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I agree with Blast.

I will also add that you need to lower the tire pressure to 26-28 psi and do a 5-10 second burn out.

Track PTM race enables line lock and launch control.


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Old 05-23-2018, 11:34 AM   #20
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Quote:
Originally Posted by Homey Da Clown View Post
Can you read IAT1 and IAT2 in the stock display?
^^^This... if you can't read IAT2 then you have no idea if you are heat soaking or not.

Quote:
Originally Posted by FringBirdAloha View Post
It only really happens to A10’s.
^^^This makes no sense. Heat soaking is supercharger temps and has nothing to do with transmission.

Comments in this thread have nothing to do with heat soak. I ran back to back to back runs in 100 deg heat at Camaro Fest last year and m 3rd run was faster than the 1st. As previously mentioned I could never do that in the 5th Gen Z.
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Old 05-23-2018, 02:59 PM   #21
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Originally Posted by Blast2hell View Post
Ok well that was your problem IMO, not heat soak. In a Drag race, you want to be in Track mode, Race. Or just hold traction control down for 7 seconds and turn it all off completely. I haven't tried turning it all off, but plan to next time I'm out.

In sport mode the car didn't give you all the power.
I have tried it all of these ways and in fact I did just hold down the TC to turn everything off for over half the day.

there are a lot of people that say their fastest passes were in sport mode...I have another thread on it a few pages back.


Tire pressure was 22-25 depending on the time of day tires were MT S/S 325/30/19 DR.

I could feel the power come back later in the evening.....yes in sport mode. it wasn't a traction issue or setting when you could feel and see the slower rpm pull on the PDR.
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Old 05-23-2018, 09:56 PM   #22
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Quote:
Originally Posted by Blast2hell View Post
Ok well that was your problem IMO, not heat soak. In a Drag race, you want to be in Track mode, Race. Or just hold traction control down for 7 seconds and turn it all off completely. I haven't tried turning it all off, but plan to next time I'm out.

In sport mode the car didn't give you all the power.
You have the same power in Sport as Track. Most of my fast passes have been made in Sport mode. Track mode doesn't add anything other than the ability to use PTM, launch control, and line lock. I've yet to try launch control at the track, because I've always had my fastest launches with everything off during 0-60 testing. That doesn't mean launch control can't produce equal results if everything is set just right.
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Old 05-24-2018, 09:21 AM   #23
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I suppose it could be heatsoak, but without any real data it’s hard to say. And just as an FYI, the ECU uses “manifold air temp” for its timing control. IAT2 is no longer the PID used. As far as I know, manifold air temp is a calculation based on coolant temp, IAT1, and IAT2. This is why I have a 160 thermostat in mine.

That said, I’ve found high IATs in all my supercharged cars when in situations like that. At the half mile events I run, it’s definitely been an issue in my other cars. Making a hard pull, then basically parking the car with a hot engine is recipe for heatsoak. Post-blower meth injection is the only thing I found that could get my IATs back down quickly. It really doesn’t matter how efficient your heat exchangers are if you have no airflow through them (like when sitting in a hot staging lane).

Just one more thought... I’d be very interested to see what your throttle was doing on these pulls. I wouldn’t be shocked if you were getting throttle closure. I’m not sure if your shorter rear tires could have been screwing with the torque management system, but these cars can be quirky. Either way, logging or monitoring throttle position and manifold air temp should tell you what you need to know.
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Old 05-24-2018, 05:19 PM   #24
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Power may or may not be the same. Traction control will intervene faster in Sport and cut power or dump boost as necessary.

Quote:
Originally Posted by 17CamaroZL1 View Post
You have the same power in Sport as Track. Most of my fast passes have been made in Sport mode. Track mode doesn't add anything other than the ability to use PTM, launch control, and line lock. I've yet to try launch control at the track, because I've always had my fastest launches with everything off during 0-60 testing. That doesn't mean launch control can't produce equal results if everything is set just right.
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Old 05-24-2018, 06:44 PM   #25
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Old 05-25-2018, 10:43 AM   #26
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Quote:
Originally Posted by Badmojo View Post
Power may or may not be the same. Traction control will intervene faster in Sport and cut power or dump boost as necessary.
I think we're talking about 2 different settings. Sounds like you're talking about Sport 1 and Sport 2 of the PTM settings, which will cut power and allow TC to intervene more. I'm talking about Sport Mode (outside of Track Mode), then either turning everything off by holding the TC button or entering Competitive Mode by double tapping It. Sport Mode gives you all the power just like Track Mode before you enter PTM. All PTM settings have a bit of intervention at some point, even Race.
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https://youtu.be/uWba1qs8M6Q 11.52 at 123mph 3500 DA
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