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What is going on here?
Posted:
Mon Feb 22, 2021 3:12 amby EH179
https://photos.google.com/share/AF1QipP ... ptbjVqRHdnNoticed this hole in the power valve well and don't believe it should be there.
It is a 750 HP main body on a N/A engine, so boost reference is not needed.
I do not recall if it was there from new and if it wasn't...what caused it?
Re: What is going on here?
Posted:
Mon Feb 22, 2021 3:38 amby Woodruff
There has to be a hole leading to manifold vacuum. Is that the only hole in the well?
Re: What is going on here?
Posted:
Mon Feb 22, 2021 4:10 amby EH179
As photos show, it would appear so.
Re: What is going on here?
Posted:
Tue Feb 23, 2021 7:11 amby GTO Geoff
EH,
I looked again at the pic & it just didn't look right. In my H book, the man vac access to the PV comes up through the bottom of that chamber.
That hole looks like a casting flaw, & it may go through to the throttle bore.
Carb also looks like an older model, doesn't have the acc pump brass transfer tube.
Cheers.
Re: What is going on here?
Posted:
Tue Feb 23, 2021 10:57 amby Right hand drive
Must be normal. Found this. Holley HP main body doing 360* view on Summit.
Re: What is going on here?
Posted:
Tue Feb 23, 2021 4:12 pmby jmarkaudio
Vacuum port leading to manifold vacuum to control the power valve. That's normal.
Re: What is going on here?
Posted:
Wed Feb 24, 2021 8:20 amby EH179
Bloody big hole for a vacuum port, but it is what it is. Thanks for the confirmation guys.