I got this from the corvette forum. Quote

"Igot my heads back on Friday, along with the flow sheets. Following are the results. CFM @ 28".
Stock:
------------------(from SilverBullets Post)
Vet Stock-------Lightning Stock
Lift in. ex.------in----ex
.200 124 102-----115 103
.300 188 131-----148 128
.400 231 164-----166 143
.500 262 171-----175 156
.600 253 182-----178 156@.550
.700 253 186-----No Data


Modified:Vet-------Lightning
Lift in. ex.
.200 147 106-------95 88
.300 203 139------145 126
.400 254 176------178 150
.500 292 202------196 163.5
.550 315----------202 167.4
.600 316 214------203 167.9
.700 316 218

Man do our heads bite... the chevy exhaust out flows our intake side at almost any lift.

[This message has been edited by MNLightning (edited 12-27-2000).]

 

Well, the heads are designed for two different purposes. Supercharged, and Nat. Aspirated. Fast and a little bit faster. Practical and unpractical. You have to make choices...

And I like my Lightning. Learning a lot about heads right now, bench building my 396...

Thanks for the info.