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Author Topic:   vortecs 350 vs 305
0six
Member
posted November 01, 2004 05:01 PM
does the 305 vortec heads with the 1.94-1.5 valves flow as good as the 350 head? thanks

[This message has been edited by 0six (edited November 01, 2004).]

Istock66
unregistered
posted November 01, 2004 07:33 PM           
no it doesnt, I just finished talking to several people about them. they end in 520 and are readily available at junk yards.

they flow 5-10cc over any other 305 head.. but not anywhere near a 350 head.

brezinski was who gave me a final dead set answer.

ruggs66
Member
posted November 02, 2004 10:11 AM
they have 1.84 & 1.5 valves also.


77k
Member
posted November 03, 2004 12:16 AM
But will the tighter cambers make up for less flow?


0six
Member
posted November 03, 2004 03:44 PM
quote:
Originally posted by ruggs66:
they have 1.84 & 1.5 valves also.

i can have the 1.94 - 1.5 valves installed. i am not worried about that im concerned about flow and cc's



ruggs66
Member
posted November 04, 2004 10:29 PM
never had the Vortec 305 heads flow tested.... But I think they have the "vortex ramps" inside the intake runner right under the valve.

That should make them poor flowing.

Peek inside the intake runner & look for that step.

are the last 3 numbers 520?