LS1-450

iTrader: (33)

Can the inlet orifice be too small & still hold its' idle. I've got a drilled hole through epoxy for idle air supply (epoxy dilled area over manifild vent & idle control air where epoxy was used to continue the sloped area into the throttle body). Noticed that w/ the new block I already had to increase the diameter of the inlet hole & she idles much better now. Was wondering if the hole can still be too small. Don't have a vacuum gauge to measure, but, she is sucking hard to get enough idle air through that hole. I've seen where some have also drilled a small hole in the butterfly plate to get a bit more air.
So, the question remains, if she idles well leave it alone or open the hole up until she doesn't sound like she's gasping for air, or add a small butterfly (throttle) plate hole.