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Ported 304 Heads

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jcisworthy View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jcisworthy Quote  Post ReplyReply Direct Link To This Post Topic: Ported 304 Heads
    Posted: Dec/14/2018 at 4:28pm
Ported 086 casting, 304 heads with 1.84, 1.5 valves. 11/32 stems

Specializing in dyno services, engine building, and cylinder head porting

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Post Options Post Options   Thanks (0) Thanks(0)   Quote jcisworthy Quote  Post ReplyReply Direct Link To This Post Posted: Dec/14/2018 at 4:30pm
In the precious post, the last flow number on the exhaust is with a pipe

All intakes numbers are with a clay radius, the exhaust is without a pipe except the last number
Specializing in dyno services, engine building, and cylinder head porting

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Post Options Post Options   Thanks (0) Thanks(0)   Quote Shawn_Watson Quote  Post ReplyReply Direct Link To This Post Posted: Dec/14/2018 at 4:48pm
Nice!  Any shots of the chamber and bowls?


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Post Options Post Options   Thanks (0) Thanks(0)   Quote jcisworthy Quote  Post ReplyReply Direct Link To This Post Posted: Dec/14/2018 at 5:11pm

Specializing in dyno services, engine building, and cylinder head porting

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Post Options Post Options   Thanks (0) Thanks(0)   Quote Boris Badanov Quote  Post ReplyReply Direct Link To This Post Posted: Dec/14/2018 at 7:39pm
I always wondered if the 304 head would be best of the iron heads
because you can open up the intake and shape the short side radius.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 232jav3sp Quote  Post ReplyReply Direct Link To This Post Posted: Dec/14/2018 at 7:56pm
So... when do these heads go on an engine?!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jcisworthy Quote  Post ReplyReply Direct Link To This Post Posted: Dec/14/2018 at 8:27pm
Boris, 
I like the 304 heads because even if they had a valve job or two the holes are small enough that bigger valves are no problem. The runners are basically the same as the bigger valve heads. 

232jav3sp, 
Should be on the dyno in a month. Going in a Hornet wagon

304 bored to 3.8" with custom forged flat top pistons, 10.5cr, Molnar rods, Bullet cam, either a performer or torker intake, 


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Post Options Post Options   Thanks (0) Thanks(0)   Quote 232jav3sp Quote  Post ReplyReply Direct Link To This Post Posted: Dec/15/2018 at 8:12am
Very excited to see the results! 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Shawn_Watson Quote  Post ReplyReply Direct Link To This Post Posted: Dec/15/2018 at 8:27am
You sure got those little valves moving some air.  Should be a fun, little engine.  What's your target rpm?


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Post Options Post Options   Thanks (0) Thanks(0)   Quote jcisworthy Quote  Post ReplyReply Direct Link To This Post Posted: Dec/15/2018 at 11:09am
Very happy with the air these heads are moving

Decision was made to run an Air Gap intake which will work well on this engine, 

The car is for my customers wife so he wanted a good driver which is why the cam is on the smaller side of things. With this cam, I think the engine will peak at 5800-6K. 

Specializing in dyno services, engine building, and cylinder head porting

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