Big bore 393ci
Thread Starter
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
LOL Blanco, shipping would run you as much. It is a steal by US standards. Z06 had frame damage and was totaled (passsenger side). Motor was unscathed so we yanked it out.
My buddy wanted the block for his dune buggy so he took those off. I was in his garage, I saw them collecting dust, we bargained and I took them
.
Used market is not big around here and most do not have a clue on "special" items. To him they were just heads
About 8K miles on them.
My buddy wanted the block for his dune buggy so he took those off. I was in his garage, I saw them collecting dust, we bargained and I took them
.Used market is not big around here and most do not have a clue on "special" items. To him they were just heads
About 8K miles on them.
I'd go for it, those heads will probably work even better with a bore that size, chamber could be touched a little bit to unshroud the valves even more and the flow would probably pick up a good bit.
Thread Starter
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
Frankly, initialy, I was thinking 4.200 bore for 401cid, but then as you mentionned I thought of the heads 4.125 bore and thought it might not be wise. I know I could open the chambers to 4.155 pretty easy (I opened my 5.3s to almost 4.0 bore, unshrouding the 2.04 valves for my 370 a bit).
Perhaps Eric K. might pitch in with some advice.
Perhaps Eric K. might pitch in with some advice.
Frankly, initialy, I was thinking 4.200 bore for 401cid, but then as you mentionned I thought of the heads 4.125 bore and thought it might not be wise. I know I could open the chambers to 4.155 pretty easy (I opened my 5.3s to almost 4.0 bore, unshrouding the 2.04 valves for my 370 a bit).
Perhaps Eric K. might pitch in with some advice.
Perhaps Eric K. might pitch in with some advice.
Frankly, initialy, I was thinking 4.200 bore for 401cid, but then as you mentionned I thought of the heads 4.125 bore and thought it might not be wise. I know I could open the chambers to 4.155 pretty easy (I opened my 5.3s to almost 4.0 bore, unshrouding the 2.04 valves for my 370 a bit).
Perhaps Eric K. might pitch in with some advice.
Perhaps Eric K. might pitch in with some advice.
Our 454 is a 4.185 bore x 4.125 stroke for this very reason. If it was a large power add engine we would not go beyond the 4.155 bore.
Thread Starter
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
NOS has a way of generating rebuilds.
I think I will stick with 4.155 bore for now.
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damn I type slow.. He wasnt even online when I sarted typing..LOL and he still got his reply in 5 minutes before mine 
Keep in mind that when you change cranks you are gonna have to change rods and pistons as well. Reason I say that is, earlier, you said that when you were ready to add cubes, you would only be a crank change away. Partially true, but you forgot to add rods and pistons to that as well, so just a reminder.
Thanks for chiming in. Yes my thoughts exactly.
I like that comment and it is so true, my guess, it has to do with charge distribution (direct port being more mercifull, part of the reason I will dump some $$ in that direction if I can) might need to invest in a FAST to do so (?)
I think I will stick with 4.155 bore for now.
I like that comment and it is so true, my guess, it has to do with charge distribution (direct port being more mercifull, part of the reason I will dump some $$ in that direction if I can) might need to invest in a FAST to do so (?)
I think I will stick with 4.155 bore for now.
Honestly... the more I think about it, you'd be better off with your original plan, try to stay on the cheap and spend the $ you saved on a good intake, like the single plane Cary from perf. indoctions offers, and have it plumbed by someone that knows what they're doing and keep nothing but a fogger on the car, 2 if you can float it. Steve Johnson would be your best bet, get one fo cary's intakes, send that to Steve, have him put your nitrous system's on the intake and you'd be a TON better off in the long run I'm sure.
That 454cid must be a blast. No need for a blower..lol. I love cubes
Den
