Guest 2002sentraSER Posted December 23, 2003 Share Posted December 23, 2003 what would you think of that and how does a 396 come about Quote Link to comment Share on other sites More sharing options...
datsunlover Posted December 23, 2003 Share Posted December 23, 2003 ? ? 396.. big block? or de-sroked 400sb? Quote Link to comment Share on other sites More sharing options...
fl327 Posted December 23, 2003 Share Posted December 23, 2003 if its a big block, its too small, I would go with at least 454. if its a small block, Ive been in a 400 destroke to 383 and it was crazy, in a 1st gen firebird... Quote Link to comment Share on other sites More sharing options...
Guest zx racer Posted December 23, 2003 Share Posted December 23, 2003 I was considdering doing a swap on a 79zx coupe but a pontiac 400 and th400 trans. Quote Link to comment Share on other sites More sharing options...
80LS1T Posted December 23, 2003 Share Posted December 23, 2003 Nope its a small block...If I'm not mistaken its a 350 block, 400 crank,and .120" bored over. Very expensive build due to the precision machining required to do .120" over on a 350 block. Guy Quote Link to comment Share on other sites More sharing options...
fl327 Posted December 23, 2003 Share Posted December 23, 2003 with a 350 to 383 yes thats the combo. the firebird i was in started with a 400 poncho, and was destroked to either 383 or the 377. Im not sure if that combo is 350 crank in a 400 with long rods or what, but it was fast... Quote Link to comment Share on other sites More sharing options...
80LS1T Posted December 23, 2003 Share Posted December 23, 2003 with a 350 to 383 yes thats the combo. A 350 to 383 is.....350 block, 400 crank, and .030" bored over A 350 to 396 is.....350 block, 400 crank, and .120" bored over Guy Quote Link to comment Share on other sites More sharing options...
fl327 Posted December 23, 2003 Share Posted December 23, 2003 Whoop there it is. Thats huge. DO IT. Quote Link to comment Share on other sites More sharing options...
Guest Nic-Rebel450CA Posted December 23, 2003 Share Posted December 23, 2003 What would be the advantage to this over a SBC 400? It would cost more, have slightly less displacement, and the only difference I can really see are those two. The stroke is still the same because it is the same crank. Is a good 400 block really that hard to come by? Quote Link to comment Share on other sites More sharing options...
datsunlover Posted December 23, 2003 Share Posted December 23, 2003 I would be wary of boring it .120 over.. that sounds like a lot to me! Wouldn't the walls become quite thin? And if it ever blew up.. it'd be toast.. youd have to buy a new motor... but I bet it'd go like hell! Quote Link to comment Share on other sites More sharing options...
BillZ260 Posted December 23, 2003 Share Posted December 23, 2003 I am pretty sure a 396 is a 396. It is a big block that chevy produced in the late 60's and that was about it I THINK. It is definatly not the same casting as the 350-400's and it isn't a smaller version of the 454 either. Someone correct me if I am wrong but a neibor had one in his 72 chevelle and it was looked like no other v8 I had seen (placment of everything is different, dist, intake width, stuff like that) Quote Link to comment Share on other sites More sharing options...
SpeedRacer Posted December 23, 2003 Share Posted December 23, 2003 Yup - a 396 is a 396 Big Block Chevy. I think it was available from 1965 to 1969 in various Chevrolets. It was later made into the 427 and 454. BillZ260 - You might be thinking of the 348 and later the 409. Strange looking heads that were only used on those two engines. Quote Link to comment Share on other sites More sharing options...
Pyro Posted December 23, 2003 Share Posted December 23, 2003 You can make a 396 cid small block by using a slightly stroked 400 crank in a 350 block bored 0.060" over. The stroke of the 400 can be increased from 3.76" to 3.83" by offset grinding the rod journals and then using small journal rods (327 rods). The stroke is increased by 0.007". So a V8 with 4.060" bore and a 3.83" stroke is 396.7 cid. A 0.030" over version is a 391 cid which normaly is a 383 cid if the stroke wasn't altered. I had this done to a 0.030" over 350 and now I have 362 cid instead of 355 cid (3.55" stroke instead of 3.48" stroke). On my next rebuild (+0.060) I will have a 368 cid. Quote Link to comment Share on other sites More sharing options...
Guest michaelk Posted December 23, 2003 Share Posted December 23, 2003 Like billz260 was saying you are probably thinking of the old chevelle ss motor. It was a big block and if you were gonna put in a big block you should go ahead and build a monster 502. I don't even think it is possible to get a BB in a datsun but then again almost anything is possible. Be the first and do it it would be one amazing little datsun. Build a bullit proof bottom end then add some afr heads and do everything right. 800 HP+ 2600 lb car =FUN. Quote Link to comment Share on other sites More sharing options...
SpeedRacer Posted December 23, 2003 Share Posted December 23, 2003 Ron Jones, who is a moderator on this site, had a 540 CID BBC in his Z and turned a 8.56@160 MPH I think. Quote Link to comment Share on other sites More sharing options...
Guest 2002sentraSER Posted December 23, 2003 Share Posted December 23, 2003 it is a 400 slightly destroked full rebuild 6 months ago and hp cam intake and carb with headers and dual 3 inch exhaust approx how much power? Quote Link to comment Share on other sites More sharing options...
Guest BigWhyteDude Posted December 23, 2003 Share Posted December 23, 2003 kinda hard to guestimate from those stats alone. Need more info on the engine. compression ratio, cam specs, type of heads, all the good stuff. Andrew Quote Link to comment Share on other sites More sharing options...
Guest michaelk Posted December 24, 2003 Share Posted December 24, 2003 hey speed racer where can i see some pictures of that BB 240z. Quote Link to comment Share on other sites More sharing options...
Guest Nic-Rebel450CA Posted December 24, 2003 Share Posted December 24, 2003 I still dont see the purpose in doing this, but it could work if you wanted to. You would basically be just building the 400 that you took the 400 crank from to start with... I suppose you could take a 327 crank and get bearing spacers and put it in a 350 block with 350 pistons to make a 327 too. Quote Link to comment Share on other sites More sharing options...
Pyro Posted December 24, 2003 Share Posted December 24, 2003 Nic, Maybe I can give a few reasons why people would build big cube engines without a 400 block. Good 400 engines are getting hard to find. However, aftermarket 400 cranks are cheap and easy to get (summit or jeps) and good 350 blocks are littering the planet. Heads don't require any modifications when used on 350 block. A machine shop would need to drill steam-holes in each cylinder head if a 400 block is used. Except when the stock 400 heads are used. There are mostly likely a few more reasons but these are the most common. Quote Link to comment Share on other sites More sharing options...
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