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  Holley PVCR sizes?

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Author Topic:   Holley PVCR sizes?
ukracer
Gearhead

Posts: 192
From: South Wales UK
Registered: Apr 2003

posted 04-19-2004 04:27 PM     Click Here to See the Profile for ukracer        Reply w/Quote
Anyone know the PVCR sizes of different Holley carbs? My 600 D/P had .047" PVCR passages and was gutless until I swopped on a metering block from an old 3310 with .063" passages. Now it romps. I also have a 950 Holley (850 with choke gone/blended etc) and it has .090" channels but I am not sure if it's been modded. I can't find any lists of the stock PCVR sizes anywhere, any ideas?
Cheers, Martin.

Mike_R
Gearhead

Posts: 178
From: Indianapolis, IN 46237
Registered: Feb 2001

posted 04-21-2004 12:48 PM     Click Here to See the Profile for Mike_R        Reply w/Quote
I've checked the diameters in several holleys and they seem to be consistently inconsistent. I have yet to find a chart that shows them. Having larger PVR holes is nice on a street car because you can run a little smaller jet but still have the fuel when you need it.

ukracer
Gearhead

Posts: 192
From: South Wales UK
Registered: Apr 2003

posted 04-21-2004 01:56 PM     Click Here to See the Profile for ukracer        Reply w/Quote
Thanks for checking Mike, just confirms my findings. I know about the PVCR/mainjet relationship and plan on making use of it as you describe. I was wondering why my engine seems to want more fuel than it should and if it was wrong metering block with smaller PVCR's than normal. The carb is used and has unknown history. As soon as the rain stops, I'll be out testing anyway and get this sorted out.
Cheers, Martin

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