400sbc build ideas

[eventhorizon66]

Event, forgive for me not being too detailed as I was off for the night. Surface area probably wasn't the best choice of words. As the rod moves further upward into the piston this will prevent him from running a decent dish wich he would probably want if he's going to run 64cc heads. I'm not arguing that a longer rod has it's benefits but the benefits aren't worth it if it's a budget build. And yes I think you get where I was going with the rest.

OK, I see what you're saying.  Thanks.

82rock: Do you have any ideas on the heads you'll run?  If this is a budget build you may try finding a set of good used World Sportsman II heads.  Though there are better heads out there now, these are still very good for a high-perf 383/400 and there are plently of used ones out there.  If you plan to buy new, skip over these heads and look into 200cc heads from Dart, RHS, or EQ (Engine Quest).  You can get a pair of RHS 200cc heads assembled for a flat tappet hyd cam for about $850-$900 (so your budget would have to strech some).  Darts will be a bit more and EQ heads will be a bit less.

[Layne]

Would you have to drill steam holes in the aftermarket heads?

[eventhorizon66]

Would you have to drill steam holes in the aftermarket heads?

Yep

[team39763]

There's a set of Canfield heads in the classified section right now. They already have the steam holes in them.  rmauto1 is the one selling them. Maybe PM him and work out a deal.

[malibu795]

IMO .020 or .030 clean it up
good hyper piston speed pro, KB etc
upgrade form the 5.565 to the 5.7
if keeping stock rods.. up-grade rod bolts..and re-condition the rods
IMO i would shoot for a cr of 9-9.5:1

i wouldnt deck the block anymore then i would have to to get it back in spec... reason what if soemthign hapens down the road adn need to deck it and your already at a 0 deck.. meaning piston is level with the deck instead of in the hole... what now?

main bore alingment.. at least get it check.. spec is all 5 jounrnal have to be with in .001"... doesnt leave much for error..

deffeantly get it balances... dont have too but a balance job will premote long bearing life and free up power over a non-balanced motor... also vibrations from the crank can effect the transmission.. manual more so then an auto..
quick compression math.. good tool for quick CR refference. http://kb-silvolite.com/calc.php?action=comp
72cc head
12cc dish
.020" in hole
4.2x.039 HG
18cc dish would be 9:1 wiht same setup..
is ~9.5:1