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07-03-2002, 10:04 PM
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#1 |
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Finally a Bulldawg
Join Date: Apr 2001
Location: Athens, Georgia
Posts: 220
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Power from 305 heads?
I saw where someone said that heads from a 305 will give a 307 some additional power. Being a former 305 driver who still has the 305 in the backyard, I was wondering what truth is behind this. Do I just bolt them on and have more power? If so, what's so great about 305 heads?
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Ah yes, the college life. School all morning, work all night, study when ya can. Uh... 
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07-03-2002, 10:38 PM
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#2 |
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its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,690
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The 305 heads have small valves, which increases port velosity over larger ones. This normally makes torque.
The 305 heads have smaller combustion chaimbers...more H/P and torque. They are also newer, with more experiance and thought into the ports. another added bonus, is the hardened exhaust valve seats, whic is the only thing keeping an old engine from living a long life on unleaded gas. Plus, they are a dime a dozen. |
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07-06-2002, 05:32 PM
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#3 |
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Account Suspended
Join Date: May 2000
Location: IL
Posts: 0
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except not all 305 heads are 1.72/1.5 valves, some truck ones are 1.94/1.50,
only downside to 305 heads really are that they are thin wall castings and dotn flow worth a damn thorugh intake ports, objective with internal combustion engines is to get as much air in and out of the engine with least amount of resistance/effort, that is if you care about volumetric efficiency., good luck |
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07-06-2002, 05:56 PM
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#4 |
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its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,690
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From a performance stand point, Randy is right. However, the 307 can only take small gulps of air to begin with.
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