406 CI build bore/stroke????
406 CI build bore/stroke???? I wanted to get my stroker kit i am trying to go with a 406CI but just wanted to know the bore anbd stroke???? I was planning on buying my kit from dyno-flow.com does anyone have any expierience with them???
a 406 is when you take a 400 sbc block (4.125" bore) with a stock 400 crank (3.75") and bore it over .030".
you, im assuming, have an LT1 block which has a stock bore of 4". most people only go with a .030" overbore. that with...
stock crank (3.48") gives you a 355.
3.75" crank gives you a 383.
3.875" crank gives you a 396.
you could use a 4" stroke crank and a .030" overbore to get 408 cubes. thats really pushing it. cam to rod contact would probably occur. might hit water jackets clearancing the block?
there was a 410 cubic inch LT1 short block for sale a short while ago.
try playing with this:
http://www.csgnetwork.com/cubicinchdispcalc.html
you, im assuming, have an LT1 block which has a stock bore of 4". most people only go with a .030" overbore. that with...
stock crank (3.48") gives you a 355.
3.75" crank gives you a 383.
3.875" crank gives you a 396.
you could use a 4" stroke crank and a .030" overbore to get 408 cubes. thats really pushing it. cam to rod contact would probably occur. might hit water jackets clearancing the block?
there was a 410 cubic inch LT1 short block for sale a short while ago.
try playing with this:
http://www.csgnetwork.com/cubicinchdispcalc.html
i was planning on obtaining a 400 CI block but the deal fell thru... 
so it looks more like a 383 or a 396 depending on what i can get for the price i wanna spend.....Thanks for the info guys.
so it looks more like a 383 or a 396 depending on what i can get for the price i wanna spend.....Thanks for the info guys. I HAD 410 CID LT1 I DROVE IT AROUND ON THE STREETS WITH OUT ANY PROBLEMS. I HAD NO OVER HEATING ISSUES. SOME OF THIS INFO ON THIS POST IS IN CORRECT. U CAN CONTACT ME @ 225-445-1534 OR OTBERRY@YAHOO.COM
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Unless you have heads that flow 330+ cfm, you are wasting money on this, especially with an LT1 block. to make this worthwhile you would need a victor converted with elbow, the above heads, 1 7/8 headers, 4 inch Mufflex, it will not make any more power than a well though out 383.
David
David
i know it is possible but dont have the funds or the patience to deal with all the things coming into a bigger build.... i already in the process of getting a Victor Jr intake made up for my build so that's taken care of. i am just hoping it all works out.
TECH Senior Member
iTrader: (3)
Joined: Oct 2006
Posts: 7,564
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From: Decatur, TN (N-W of Athens)
You start getting into anything over .060 bore and that starts getting touchy..
I have found the easiest and cheaper way to go larger cubes is LS based. You can flame me about it, but it's the truth. The Blocks are designed differently, and it's just alot easier to do.
I built a very simple 402ci bottom-end out of a stock 6.0l Ironblock, and an Eagle 4.000" Crank with the Pistons/Rods to match. .030 over an it's a 408, .060 over an it's a 414, and still very streetable. Personally I wouldn't go past the 408, but it can be done. The only thing I clearanced was the Oil Pan, the #1 Rod Bolt scuffs in a spot if you don't grind it down a little bit.
I have found the easiest and cheaper way to go larger cubes is LS based. You can flame me about it, but it's the truth. The Blocks are designed differently, and it's just alot easier to do.
I built a very simple 402ci bottom-end out of a stock 6.0l Ironblock, and an Eagle 4.000" Crank with the Pistons/Rods to match. .030 over an it's a 408, .060 over an it's a 414, and still very streetable. Personally I wouldn't go past the 408, but it can be done. The only thing I clearanced was the Oil Pan, the #1 Rod Bolt scuffs in a spot if you don't grind it down a little bit.
TECH Senior Member
iTrader: (3)
Joined: Oct 2006
Posts: 7,564
Likes: 4
From: Decatur, TN (N-W of Athens)
While I'm all for sticking with the LTx motors, with the over abundance of GEN III motors around (don't think LS by that, truck motors like Mervs), it's just too cheap to pass up if you can find a good deal on a motor pull. Rear ended or T-Boned trucks in the junkyards are great spot to get all you need.
Yes Merv, I know you got a great deal on your short block -_- Asshat
Yes Merv, I know you got a great deal on your short block -_- Asshat
