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Drilling TB blade in order to increase airflow at idle?????

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Old 02-19-2018, 07:12 PM
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Default Drilling TB blade in order to increase airflow at idle?????

has anyone ever had to or heard of having to drill a hole in there TB in order to increase airflow so truck will idle correctly after installing a turbo and cam?
Old 02-19-2018, 07:15 PM
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Yes people do it but if you know how to tune it, you shouldn't have too in most cases.

Playing with the idle airflow tables within the tune will normally solve this problem.
Old 02-19-2018, 07:24 PM
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Originally Posted by FFDP
Yes people do it but if you know how to tune it, you shouldn't have too in most cases.

Playing with the idle airflow tables within the tune will normally solve this problem.
kinda what i figured the only reason I’m asking is because my truck is currently being tuned and the tuner wants to drill a hole in the blade in order to fix the problem and it just seemed alittle odd and maybe like he was taking the easy way out in order to fix the problem
Old 02-19-2018, 07:25 PM
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Originally Posted by Kws82590


kinda what i figured the only reason I’m asking is because my truck is currently being tuned and the tuner wants to drill a hole in the blade in order to fix the problem and it just seemed alittle odd and maybe like he was taking the easy way out in order to fix the problem
Sounds like you need to find your self a new tuner. Any competent tuner should be able to dial in the idle within the tune without “mechanically” altering the truck
Old 02-19-2018, 07:40 PM
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Originally Posted by MrHorsepowerLSx
Sounds like you need to find your self a new tuner. Any competent tuner should be able to dial in the idle within the tune without “mechanically” altering the truck
he’s telling me that truck is requesting more air and the computer will not allow him to open the TB any further...I’ve had my truck tuned by him in the past multiple times and have never once had any issues like this he tuned the last Turbo set up i was running without a problem but now I’m running a bigger Turbo and a cam and he’s having issues with idle could we be over look something small like too small of an air filter or a restrictive intercooler?? Just thinking out loud at this point
Old 02-19-2018, 08:10 PM
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Is it a DBW or DBC throttlebody?
Old 02-19-2018, 08:31 PM
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Originally Posted by 03sierraslt
Is it a DBW or DBC throttlebody?
92mm ls2 DRW
Old 02-19-2018, 08:56 PM
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Do not let anyone drill a hole. Find someone else to tune it if need be.

What is the engine setup? An I assume you mean 90mm LS2
Old 02-19-2018, 09:30 PM
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Originally Posted by 03sierraslt
Do not let anyone drill a hole. Find someone else to tune it if need be.

What is the engine setup? An I assume you mean 90mm LS2
yes my mistake 90mm* 5.3 with a 75mm Turbo and a stage 2 Turbo cam kit
Old 02-19-2018, 09:39 PM
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Your airflow demand at idle is fairly low with a 5.3 and a mild turbo cam. That should be no issue tuning.


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