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Old 11-29-2017, 12:09 PM   #1
gringo

 
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WOT restriction until 4k rpms?

Does the LGX still have the WOT restriction until 4K rpms like the old LFX?
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Old 11-29-2017, 07:17 PM   #2
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Does the LGX still have the WOT restriction until 4K rpms like the old LFX?
auto yes manual no.
I have a 2.0t Camaro but its the same for v6 and v8
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Old 11-30-2017, 09:47 AM   #3
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Wait, what is this WOT restriction?
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Old 12-01-2017, 06:39 AM   #4
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Wait, what is this WOT restriction?
It's where the throttle blade does NOT open 100% until 4k rpms are reached. On the LFX, it was actually hardcoded into the ECU. Not even a tune could fully remove it.

When you WOT from a stop, it will restrict the throttle until you reach 4k rpms. When you reach 4k rpms, the ECU will allow the throttle blade to open up fully.
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Old 12-01-2017, 08:51 AM   #5
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Originally Posted by gringo View Post
It's where the throttle blade does NOT open 100% until 4k rpms are reached. On the LFX, it was actually hardcoded into the ECU. Not even a tune could fully remove it.

When you WOT from a stop, it will restrict the throttle until you reach 4k rpms. When you reach 4k rpms, the ECU will allow the throttle blade to open up fully.
Interesting. Is this hard coded into the LGX as well? I'm getting the Trifecta tune mostly because I read it added more low end power and this could be what it's fixing (if it isn't hard coded, of course).
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Old 12-01-2017, 10:38 AM   #6
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Quote:
Originally Posted by gringo View Post
It's where the throttle blade does NOT open 100% until 4k rpms are reached. On the LFX, it was actually hardcoded into the ECU. Not even a tune could fully remove it.

When you WOT from a stop, it will restrict the throttle until you reach 4k rpms. When you reach 4k rpms, the ECU will allow the throttle blade to open up fully.
This is why everyone bought the vitesse throttle controllers.
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Old 12-01-2017, 04:38 PM   #7
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Interesting. Is this hard coded into the LGX as well? I'm getting the Trifecta tune mostly because I read it added more low end power and this could be what it's fixing (if it isn't hard coded, of course).
I don't know. I use to think that the LGX didn't have the WOT restriction since the performance improvement over the LFX was more than the weight savings alone could account for.

If we assume an average weight loss of about 250 lbs and the 10-12 hp difference, that would make the 6sp manual LGX around 3-4 tenths faster than a 6sp manual LFX. I'm keeping the A8 out of the discussion due to obvious reasons.

The LGX 6sp manual is rated at 5.3 secs from 0-60 and 13.7 in the 1/4 mile. The LFX 6sp manual was rated at 5.9 secs from 0-60 and 14.3 in the 1/4 mile. That's around 6/10ths of a difference.

Weight and hp difference add up to around 30 hp total. Where is the extra 3 tenths coming from? If GM eliminated the WOT restriction on the LGX, that could explain it.
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Old 12-12-2017, 06:53 PM   #8
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I have a 2016 manual 1LT v6, no throttle hold back at all. The car responds to wot at 2000,3000 etc. I notice no change after 4000 at wot.
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Old 12-12-2017, 06:57 PM   #9
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Originally Posted by gringo View Post
I don't know. I use to think that the LGX didn't have the WOT restriction since the performance improvement over the LFX was more than the weight savings alone could account for.

If we assume an average weight loss of about 250 lbs and the 10-12 hp difference, that would make the 6sp manual LGX around 3-4 tenths faster than a 6sp manual LFX. I'm keeping the A8 out of the discussion due to obvious reasons.

The LGX 6sp manual is rated at 5.3 secs from 0-60 and 13.7 in the 1/4 mile. The LFX 6sp manual was rated at 5.9 secs from 0-60 and 14.3 in the 1/4 mile. That's around 6/10ths of a difference.

Weight and hp difference add up to around 30 hp total. Where is the extra 3 tenths coming from? If GM eliminated the WOT restriction on the LGX, that could explain it.
Aren't the v6 cars close to 300 lbs lighter? that is about .3 right there. Add the 12 horses and not sure how much more torque and that's another .1
+
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Old 12-13-2017, 11:48 AM   #10
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Aren't the v6 cars close to 300 lbs lighter? that is about .3 right there. Add the 12 horses and not sure how much more torque and that's another .1
+
Granted i have an auto. I just did the scales at MIR a few weeks back. 3850 with me sitting in the car. Im good for close to 400lbs...maybe closer to 375 right now since its been colder.
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