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Old 05-30-2020, 02:42 PM   #1
stlwrx
 
Drives: 2020 LT1, 04 JDM STI, 18 BMW
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2020 LT1 Base Dyno

Afternoon All,

Had the pleasure of putting my 2020 LT1 on the rollers today at my buddies shop. This is a bone stock 2020 LT1 minus AWE axel back exhaust. It’s a 10 speed auto. Put down 403/425 on a DynoJet.

No real plans for it anytime soon as I already have a fully built track car this is just a fun daily car.
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Old 05-30-2020, 06:04 PM   #2
Marty31
 
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Plenty enough to have fun
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Old 05-31-2020, 07:14 PM   #3
lt4camaro


 
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The dyno is set for STD, SAE is less. 403 wheel hp on a dyno set at STD is not a great # close to the actual Factory rating of 455. 403 SAE wheel hp would be a decent healthy #
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Old 05-31-2020, 10:33 PM   #4
stlwrx
 
Drives: 2020 LT1, 04 JDM STI, 18 BMW
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Quote:
Originally Posted by lt4camaro View Post
The dyno is set for STD, SAE is less. 403 wheel hp on a dyno set at STD is not a great # close to the actual Factory rating of 455. 403 SAE wheel hp would be a decent healthy #
Well, its a 10 speed so you have more drive train loss compared to manuals so I think its right where it should be - thanks for your thoughts though.
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Old 05-31-2020, 10:41 PM   #5
stlwrx
 
Drives: 2020 LT1, 04 JDM STI, 18 BMW
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Quote:
Originally Posted by lt4camaro View Post
The dyno is set for STD, SAE is less. 403 wheel hp on a dyno set at STD is not a great # close to the actual Factory rating of 455. 403 SAE wheel hp would be a decent healthy #
Also to add to my post, someone please correct if wrong, but I only think there is roughly a 4% difference between SAE and STD. Dyno was 72 this day. So 4% lower puts it right were 10 speeds should be between 385-400. Also, this was only a 6th gear pull instead of he standard 7th for 10-speeds as in 7th we kept hitting speed governor as the 2020 LT1s are limited to 150 due to all season 245s.

STD:
Air Temperature: 60F
Absolute Pressure: 29.92 inches Hg
Relative Humidity: 0%

SAE:
Air Temperature: 77F
Absolute Pressure: 29.23 inches Hg
Relative Humidity: 0%
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Old 06-01-2020, 08:21 AM   #6
lt4camaro


 
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Quote:
Originally Posted by stlwrx View Post
Well, its a 10 speed so you have more drive train loss compared to manuals so I think its right where it should be - thanks for your thoughts though.
Just saying 403 rwhp on a dyno set at std is a good number, not on the high side and not on the low side of the the crank 455 factory rating. 403 rwhp on same dyno set at SAE would be on the higher side of the 455 factory crank horse rating IMO.
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