Small Block & Big Block Chevy Specific Mouse & Rat Motor Discussion & Conversions

what is the difference between these heads?

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Old Jan 8, 2005 | 10:32 PM
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From: arlington aka aggtown
Default what is the difference between these heads?

what is the difference between the 18' and 23' degree heads?
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Old Jan 8, 2005 | 10:42 PM
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18* flows better...I think...
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Old Jan 8, 2005 | 10:45 PM
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The angle the valve is in relation to the deck. 23* is stock. 18* flows better, but usually requires special parts.
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Old Jan 8, 2005 | 10:47 PM
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From: arlington aka aggtown
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well guys thanx for the info and the 18' spx heads from brodix dont require any special products

hopefully i will be making around 620 hp
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Old Jan 9, 2005 | 12:35 PM
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i know my 18* Dart heads also have raised runners which improve flow. plus i think 18* heads allow for much larger valves. my valve sizes are 2.15I/1.625E. and i do remember reading up on some Brodix heads that are 18* but accept 23* valve train. not bad, but i dont know exactly how they do it or if there are any limitations on flow caused by it. but they should still flow very well and out do 23* heads with the same amount of work.

do you still have to use an intake setup for 18* heads? if not, that may be another plus.

later,
Dave
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Old Jan 9, 2005 | 12:42 PM
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well the package i get it come with the whole top end got it from jegs

it includes the Heads, Valve Covers, Intake, Gaskets, Spark Plugs, Bolts and washers and a Baseball cap
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Old Jan 9, 2005 | 04:25 PM
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i know what kit you're referring to. seemed like a pretty decent price when i was looking into it.

later,
Dave
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Old Jan 10, 2005 | 11:30 PM
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whats the price on that kit? does the intake that comes in the kit compare to the victor jr or a super victor?
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Old Jan 10, 2005 | 11:34 PM
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From: arlington aka aggtown
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Originally Posted by 1QuickT-A
whats the price on that kit? does the intake that comes in the kit compare to the victor jr or a super victor?
th eprice was 2911.00 and the intake flows like the vic intakes
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Old Jan 11, 2005 | 07:35 AM
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Make sure you really check piston to valve clearances when going from 23 degree head to a 18 degree head like was mentioned a few replies before bigger valves and most sbc pistons will only accept 2.10s without a little clearance work. Good luck 18 degree is the way to go.
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