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BBK Throttle Body Question

1216 Views 6 Replies 5 Participants Last post by  EagleAutosports
I just got a used 70mm BBK TB and I noticed that it has a hole in the throttle body blade. I can't tell if this is suppose to be there or if the previous owner has drilled it. Can anyone who may have one of these TB's please tell me if this hole is suppose to be there? Thanks!!
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Well, the guy just gave me the TB without any packaging or anything and there are no #'s on the TB itself. All I know is it is 70mm.
TB Question

I have heard that drilling a hole in the throttle body blade is a way to
stop certain throttle bodys from whistling
I have heard of guys drilling a hole in it, as they think this will improve their idle quality.
Yeah I've heard the same things about drilling a hole. I just didn't know if this is the way BBK makes them or if this was just something that the previous owner did. I think I may go and patch the hole and try it and see what happens. He told me the reason he was getting rid of it was that his car didn't run well with it. This may be why he drilled a hole in it.
That's supposed to be a way to cure a surging idle. You can try patching the hole and see if it improves or gets worse.
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