engine and head combo 400sb
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Joined: Dec 2006
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From: Centennial Colorado
engine and head combo 400sb
ok heres it is. we got our 406sb block code is 3951511 and the heads are 333882 i would like to know if this is a good combo. i kow the 511 is the stronger block its two bolt but the heads are more of what im looking at as far as flow its got a pretty hot cam no specs on thet yet still have to get the paper work on the engine. heads have been ported and polished with roler rockers. any help would be great thank.
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Joined: Apr 2005
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From: Dale City VA
Any 2 bolt 400 block is better than a 4 bolt 400. I have seen some with just 2 freeze plugs in the side and no boss (identical to a 350 externally) and have one lying around the shop but I don't remeber the casting number off the top of my head, 509 I think but I would have to look at it. I have also seen some that has 2 freeze plugs and an un-bored boss on the side (like a bowtie block). Anyway IMO if you have a 2 bolt 400 SBC and its got strait cyls and not cracked you have a good bolck.
As for the heads 882's are just regular old smog heads, nothing special really. 882's are better than most as far as flow numbers stock espc at lower lifts. They do have a reputation for cracking in the exhaust seat area thou.
Hows your port work look? I am always leery of ported heads since there are so many clowns out there with a $20.00 Dremel, making the "trumpet" port or worse grinding the floor out of the exhaust ports and the choke out of the intakes all the while still using the stock joke of a valve job. If they have a nice 3 angle valve job and the ports short side radius's are still intact, a set of 882's will make some decent power to about 5500RPM with the right cam and induction. You can check out stock flow numbers here
http://www.purplesagetradingpost.com...fo/heads1.html
Will
As for the heads 882's are just regular old smog heads, nothing special really. 882's are better than most as far as flow numbers stock espc at lower lifts. They do have a reputation for cracking in the exhaust seat area thou.
Hows your port work look? I am always leery of ported heads since there are so many clowns out there with a $20.00 Dremel, making the "trumpet" port or worse grinding the floor out of the exhaust ports and the choke out of the intakes all the while still using the stock joke of a valve job. If they have a nice 3 angle valve job and the ports short side radius's are still intact, a set of 882's will make some decent power to about 5500RPM with the right cam and induction. You can check out stock flow numbers here
http://www.purplesagetradingpost.com...fo/heads1.html
Will
Last edited by rklessdriver; Mar 23, 2007 at 08:02 PM.
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Joined: Dec 2006
Posts: 88
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From: Centennial Colorado
thank you for all the info i will take some pics of the engine soon i still need to pic up the paper work on the engine to know for shure what cam and all the internal patrs are.i will get back to you on this.the guy that built it is terry at western engine supply here in colorado he has built som real nasty engines for my father inlaw he told me it will be putting out around 480 hp or so. he is the owner of the shop and very good at what he does. cant waite to see how it runs. thanks again for all your helpand info.
