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  #46 (permalink)  
Old 01-25-2013, 01:03 PM
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Quote:
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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  #47 (permalink)  
Old 01-26-2013, 09:57 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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  #48 (permalink)  
Old 01-26-2013, 10:24 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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  #49 (permalink)  
Old 01-26-2013, 10:32 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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Old 01-26-2013, 02:59 PM
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If you got a 400block build a 406cid street engine. 377 is good for a blower motor using the 400 block.
You're not building a blower motor.

Get a 400 crank and some 5.7" rods.

64cc heads use a dished 400 piston on your 406.

70+cc heads can use a flat top 400 piston. Don't get it mixed up.
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  #51 (permalink)  
Old 01-26-2013, 03:14 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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  #52 (permalink)  
Old 01-26-2013, 03:20 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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  #53 (permalink)  
Old 01-26-2013, 03:31 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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Old 01-26-2013, 06:59 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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Old 06-10-2013, 06:39 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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