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  #31 (permalink)  
Old 01-22-2013, 08:48 PM
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Quote:
Originally Posted by malc View Post
On the Brodix F.A.Q. website page it says not to drill steamholes.
Your statement is misleading. Looks like to me what they are actually saying is that the heads are manufactured with holes that match up with the holes in the block and that you must make sure the holes are drilled in the gaskets. Read it for yourself......

Q. Do you recommend steam holes on BRODIX heads?
A. No, the BRODIX water jacket is more efficient than previous heads. Just make sure all holes are properly lined up and drilled in head gaskets to efficiently pass water.

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  #32 (permalink)  
Old 01-22-2013, 11:05 PM
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Brodix says no steam holes. Period. That was confirmed to me some time ago. What is being talked about are the head gasket/block coolant passages, in some cases they don't line up as well as they could and need to be located better. There are also things to look out for on the head gaskets, as shown here: Small Block 400 Cooling Tricks.

FWIW, Joe Sherman doesn't use them. But he'll gladly do them for others. For a fee, of course.

As far as a 325 hp 10.25:1 sbc LS3 2bbl 400, I'll have to pass on that one. lol Except to say the only engine I know of that comes close to that was a 402 BBC. Another odd engine was the 265 hp bbc 396/2bbl.

Last edited by cobalt327; 01-22-2013 at 11:30 PM.
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  #33 (permalink)  
Old 01-22-2013, 11:45 PM
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Well they changed their advise.
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  #34 (permalink)  
Old 01-22-2013, 11:49 PM
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Quote:
Originally Posted by techinspector1 View Post
Your statement is misleading. Looks like to me what they are actually saying is that the heads are manufactured with holes that match up with the holes in the block and that you must make sure the holes are drilled in the gaskets. Read it for yourself......

Q. Do you recommend steam holes on BRODIX heads?
A. No, the BRODIX water jacket is more efficient than previous heads. Just make sure all holes are properly lined up and drilled in head gaskets to efficiently pass water.
My statement is not misleading, they say no steamholes.
They do not say the heads already have steamholes, I read it that all the regular holes for water are checked to be lined up and clear.
Nowhere does it say there are steamholes in existence.

Q. Do you recommend steam holes on BRODIX heads?
A. No, the BRODIX water jacket is more efficient than previous heads. Just make sure all holes are properly lined up and drilled in head gaskets to efficiently pass water.

Anyway the original poster completely ignored my post so what do I care how you read it ?

Last edited by malc; 01-22-2013 at 11:58 PM.
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  #35 (permalink)  
Old 01-22-2013, 11:56 PM
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I have a 350 so steamholes are not an issue.
These are my IK200 heads check them out for steamholes.
Click the pic to enlarge it.

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  #36 (permalink)  
Old 01-25-2013, 04:29 AM
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Since this topic is here. Let me know how your engine runs. I'm getting these heads as well and I've seen a few reviews of them but no ongoing discussions.
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  #37 (permalink)  
Old 01-25-2013, 02:03 PM
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Originally Posted by Deathmunchy View Post
Since this topic is here. Let me know how your engine runs. I'm getting these heads as well and I've seen a few reviews of them but no ongoing discussions.
I really liked them on my 383 straight out the box vey well
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  #38 (permalink)  
Old 01-26-2013, 10:57 AM
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The guy at the machine shop said do a 377 instead of a 406 any info on 377
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  #39 (permalink)  
Old 01-26-2013, 11:24 AM
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Forget the 377. If you have a good 400 sbc block, build a 400.

The shorter stroke of the 350 crank in a 400 block looks good on paper, and can make a good displacement limited race engine. But for a street vehicle there's just no point in giving up ~25 ci.

Unless you use a custom crank having the 350 sbc stroke and 400 main journal diameter, you'll have to use thick spacer bearings or spacers behind regular 400 bearings. Neither of which are as as good as using a normal insert and the correct journal size that matches the main saddles of the block IMO.
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  #40 (permalink)  
Old 01-26-2013, 11:32 AM
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Someone told me a 377 just a high rpm motor but u can make more power with less rpm on 406 or 421
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  #41 (permalink)  
Old 01-26-2013, 04:14 PM
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7cc flat-tops with a 76cc chamber will make 10.0:1 SCR.
18cc D-cups with a 76cc chamber will make 9.0:1 SCR
30cc D-cups with a 76cc chamber will make 8.3:1 SCR
7cc flat-tops with a 64cc chamber will make 11.4:1 SCR
18cc D-cups with a 64cc chamber will make 10.2:1 SCR (This is where I'd go for pump gas and 64cc aluminum heads)
30cc D-cups with a 64cc chamber will make 9.1:1 SCR
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  #42 (permalink)  
Old 01-26-2013, 04:20 PM
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Quote:
Originally Posted by cobalt327 View Post
Unless you use a custom crank having the 350 sbc stroke and 400 main journal diameter, you'll have to use thick spacer bearings or spacers behind regular 400 bearings.
Should read: "Unless you use a custom crank having the 350 sbc stroke and 400 main journal diameter, you'll have to use thick spacer bearings or spacers behind regular 350 bearings."
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  #43 (permalink)  
Old 01-26-2013, 04:31 PM
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Thanks for all the info. I just wanna do all my homework before i spend alot of money because its to easy to spend to hard to make back
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  #44 (permalink)  
Old 01-26-2013, 07:59 PM
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I went the other way. I built a 434 using a dart block.Way more horse power than I need,not as much as I want,lol. a very mild 434 can make north of 500 horse power and have a fairly smooth idle.They can also make 650 horse power and be very street able using a mild gear.
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  #45 (permalink)  
Old 06-10-2013, 07:39 AM
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Steam holes???

Quote:
Originally Posted by gamedawg03 View Post
I am about to get my 406 built. I have brodix ik 200 heads from my 383 do i need to get steam holes drilled in them thanks
Hi! I was looking for the same investigation and i've found the following:
http://www.brodix.com/instructions/i...hevy_heads.pdf.

It looks like interesting.
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