Hole in TB blade?!

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Apr 11, 2008 | 10:47 AM

logo_craig

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From: Lubbock, Tx

Hole in TB blade?!

Quote:

Originally Posted by 02EBZO6

The reason the hole is there in the blade is to let air in at idle. There is an idle airflow circuit that the ECM runs to make the engine idle right. When you put in a big cam the I.A.C. maxs out trying to allow enough air at idle. So, you drill that hole bigger to help it out.

i just read this in another thread...does this really work? has anyone done this who has a big cam??

Thanks,
Logan

Apr 11, 2008 | 10:49 AM

BarneyMobile

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I kno the stock TB already has a hole in it. I had to drill a hole in my BBK so it would idle. I would say that sounds about right.

Apr 11, 2008 | 11:01 AM

bczee

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This is a really old tuning trick that goes back to Carburator days..... it does work.. just be carefull on how big you go.. start small, then enlarge it as you need..

Apr 11, 2008 | 11:02 AM

logo_craig

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From: Lubbock, Tx

what could i use to make it bigger?

Apr 11, 2008 | 11:07 AM

Unstang

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Quote:

Originally Posted by logo_craig

what could i use to make it bigger?

A drill & some bits, as stated before, start small & go larger as needed.
A good tune won't need the hole enlarged...

Apr 11, 2008 | 11:12 AM

logo_craig

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From: Lubbock, Tx

Quote:

Originally Posted by Unstang

A drill & some bits, as stated before, start small & go larger as needed.
A good tune won't need the hole enlarged...

ok thats what i figured..
well i know but my car hasnt been tuned in a really long time...i was just kidna wondering if this would work. I dont think I will actually do it.

thanks for the help!

Apr 11, 2008 | 11:50 AM

02silvaZ

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bring it up but wont try it, waste of typing here, lol!

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Apr 11, 2008 | 12:50 PM

BigDaddyBry

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From: Ridgecrest, CA

And you get more affect from drilling another, albeit smaller, hole. More so than just enlarging your current hole.

And I agree with Unstang, but it does depend on the cam.

Apr 11, 2008 | 01:52 PM

#10

Unstang

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Quote:

Originally Posted by NOZR1

I disagree. Check out several of Nick Williams posts in this thread about drilling a hole...
https://ls1tech.com/forums/showthread.php?t=894576

My tuner also needed to enlarge the hole in the blade of my tb for my stroker. It runs great.

I was thinking more along the lines of a stock TB, I forgot that some or maybe all the large TBs do not have a hole in them to start with.

I realize there a million set ups & 10 million ways to do things, so I guess my statement was way too generalized. I've just seen too many guys drilling huge holes in stock TBs to make smallish cams idle.

Apr 11, 2008 | 02:09 PM

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ss.slp.ls1

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That's really only an aide, after a big cam swap, a tune is essential.

Apr 11, 2008 | 07:29 PM

#12

MIKE02WS6

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Quote:

Originally Posted by ss.slp.ls1

That's really only an aide, after a big cam swap, a tune is essential.

x2

I experienced this first hand. Drilling the additional hole in my tb after my cam swap made the car idle. It wasn't perfect but it did run. It was enough to make it run to go get it tuned. Now it idles perfect. For sure get it tuned!!!

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