TB Question

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Sep 27, 2011 | 04:02 PM

TMMYJMMY

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Joined: Mar 2008

Posts: 15

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From: mich.

Car: 1989 IROC

Engine: 5.7

Transmission: AUTOMATIC

Axle/Gears: POSI

TB Question

So I'm in the middle of a 383, and we decided to bore out the throttle body. Now my concern is the little hole on the right side, up top; the disk covers the hole. However after boring the TB out the hole was enlarged, so my question is if this will cause any problems?

Sep 27, 2011 | 07:42 PM

89RESTO

2011 Norwood Gathering
ThirdGen Camaro Rep

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From: MICH.

Car: 1989 IROC

Engine: 5.7

Transmission: 700R4

Axle/Gears: 9 bolt 2:77

Re: TB Question

Pictures are always good.

Sep 27, 2011 | 08:35 PM

TTOP350

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From: Il

Car: 1989-92 FORMULA350 305 92 Hawkclone

Engine: 4++,350 & 305 CIs

Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5

Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt

Re: TB Question

Thats a idle air bypass. You may have a high idle unless u make the hole smaller,use a 2part epoxy. Thats what I did.

Last edited by TTOP350; Sep 28, 2011 at 01:16 PM.

Sep 28, 2011 | 01:00 AM

vetteoz

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From: Not in Kansas anymore

Car: 82 Z28

Engine: 383 SP EFI/ 4150 TB

Transmission: T400

Axle/Gears: QP 9" 3.73

Re: TB Question

Quote:

Originally Posted by TMMYJMMY

we decided to bore out the throttle body.
my concern is the little hole on the right side, up top
However after boring the TB out the hole was enlarged, so my question is if this will cause any problems?

I don't see a problem unless it allows air to leak past the blades when they are closed.

Is only the source for the small vac tube under drv side of TB