Factory Magnum Heads

Well I finally got around to opening up the head for 2.055 valve and reflowed the head and this is what it did.

.100 78
.200 119
.300 182
.400 215
.500 239
.600 238

This is a good bit less than what the head did with the stock size valve in it, I thought that maybe it was the bench so I flowed a MP head that I flowed before and it flowed like it should have, so the larger valve hurt the flow and slowed down the port velocity a good bit.
This is what it flowed with the 1.92 valve.

.100 84
.200 139
.300 201
.400 231
.500 246
.600 252

This just goes to show that bigger isn't always better.