Is it possible to stroke a 400 more than it already is?
 

Yeah so I was looking at cranks for my 400 and I saw that there was sbc 427 ones or something.. my question is.... does this mean that it is basically a 400 stroked yet even more? I am pretty sure it isn't bored.

Yes they are making stroker cranks for the 400 blocks now! WWW.SPEEDOMOTIVE.COM even has a 434 rotating assembly and more. I understand that you already have your block. But with that much custom work I would build a big block!!

Yes, it can be done. It requires an aftermarket block to do so though. The cam has to be repositioned to clear the rods.

chris

yeah I wasn't gunna do it... just saw it and wondered

I'm pretty sure you can go to a 4.875 stroke (415") with a stock block. Phil

That 3.875" stroke,and yes it will fit in most production 400 blocks.A 421 is as big as it gets the easy way.I have heard of bigger,but I dont know if grinding the hell out of the block and running small journal rods is an easy deal to build.Some kits with offset ground 3.76" cranks with small journal rods are a good deal because they go together with almost no grinding and dont cause cam clearance problems.You can do a 415 without a small base circle cam or block grinding if you use that setup.The best way to do a 434 is with a bowtie block.You dont need a raised cam version,but you need the added crankcase clearance of the bowtie block.With a raised cam rocket block you can stroke it to about 460 inches,but at that point you have to wonder why you didnt buy a 454 pickup truck motor and bore it .030 over and have a 461 for about 1/3 the cost.

Just build a real good 406 motor. I built a 427 and I don't even want to talk about it. Hope you have a very large wallet. Took 3 blocks to find the rite one to use. If you get a Rocket block you can go all the way to a 504 cu.ci. motor, they raised the cam up the same location as the BBC.
Lunati has kits that go up to 461 cubes
heres their site
<a href="http://www.lunaticams.com/" target="_blank">http://www.lunaticams.com/</a>
Its a great motor but EXPENSIVE and alot of work.

[ December 21, 2002: Message edited by: 1BAD80 ]</p>

I was under the impression that a 427 required the cam location change. I know there can be problems with that stroke arrangment.

1BAD80, were you able to find an oem block that worked. Also, anyone know the cam lift limitations. I would guess a big roller would be out of the question if trying to use an oem block.

I am curious because I have toyed with the idea of a 427, but my budget is not deep enough for a new block yet. Maybe the next buildup...

Chris

Genuine Lunati® Professional Engine Assemblies
Small Block Chevrolet V-8 from 300 C.I.D. 461 C.I.D.
Only best components are used such as Lunati forged pistons, Pro Series barrel-faced moly plasma
1/16", 1/16" and 3/16" rings, either Pro Mod or Pro Billet conecting rods, alecular bearings and either Pro Series or Racer Series crankshafts.

All intemally balanced.
Part #: EA50
Racer Series crankshaft with drilled #1 and #4 rod journals, 3.480" and 3.500" stroke. Minimum 6.000" Pro Mod connecting rods, Lunati flat top pistons, bearings and rings. EA50
$2,461.00
Part #: EA51
Racer Series crankshaft with drilled #1 and #4 rod journals, 3.480" and 3.500" stroke. Minimum 6.000" Pro Mod connecting rods, Lunati domed pistons, bearings and rings. EA51
$2,519.00
Part #: EA52
Racer Series crankshaft with drilled #1 and #4 rod journals, 3.750" stroke. Minimum 6.000" Pro Mod connecting rods, Lunati flat top pistons, bearings and rings. EA52
$2,517.00
Part #: EA53
Racer Series crankshaft with drilled #1 and #4 rod journals, 3.750" stroke. Minimum 6.000" Pro Mod connecting rods, Lunati domed pistons, bearings and rings. EA53
$2,519.00
Part #: EA54
Racer Series crankshaft with drilled #1 and #4 rod journals, 3.750" stroke. 5.700" Pro Mod connecting rods, Lunati flat top pistons, bearings and rings. EA54
$2,647.00
Part #: EA55
Racer Series crankshaft with drilled #1 and #4 rod journals, 3.750" stroke. 5.700" Pro Mod connecting rods, Lunati domed pistons, bearings and rings. EA55
$2,705.00
Part #: EA60
Pro Series crankshaft with all pin holes drilled, 3.000" - 3.750" stroke. Minimum 6.000" Pro Mod connecting rods, Lunati flat top pistons, bearings and rings. EA60
$2,866.00
Part #: EA61
Pro Series crankshaft with all pin holes drilled, 3.000" - 3.750" stroke. Minimum 6.000" Pro Mod connecting rods, Lunati domed pistons, bearings and rings. EA61
$2,906.00
Part #: EA62
Pro Series crankshaft with all pin holes drilled, 3.800" - 4.000" stroke. Minimum 6.000" Pro Mod super duty connecting rods, Lunati flat top pistons, bearings and rings. EA62
$2,965.00
Part #: EA63
Pro Series crankshaft with all pin holes drilled, 3.800" - 4.000" stroke. Minimum 6.000" Pro Mod super duty connecting rods, Lunati domed pistons, bearings and rings. EA63
$3,005.00
Part #: EA64
Pro Series crankshaft with all pin holes drilled, 3.000" - 3.750" stroke. Minimum 6.000" Lunati billet connecting rods, Lunati flat top pistons, bearings and rings. EA64
$3,441.00
Part #: EA65
Pro Series crankshaft with all pin holes drilled, 3.000" - 3.750" stroke. Minimum 6.000" Lunati billet connecting rods, Lunati domed pistons, bearings and rings. EA65
$3,447.00
Part #: EA66
Pro Series crankshaft with all pin holes drilled, 3.800" - 4.000" stroke. Minimum 6.000" Lunati billet connecting rods, flat top pistons, bearings and rings. EA66
$3,506.00
Part #: EA67
Pro Series crankshaft with all pin holes drilled, 3.800" - 4.000" stroke. Minimum 6.000" Lunati billet connecting rods, domed pistons, bearings and rings. EA67
$3,546.00
Part #: EA68
Pro Series crankshaft with all pin holes drilled, 4.125" - 4.250" stroke. Minimum 6.000" Lunati billet connecting rods, Lunati flat top or domed pistons, bearings and rings. EA68
$3,633.00

Hi Chris,
Heres Lunati price list for their engine kits.
The machining for my motor was done by a friend that we built a chassis for a Alcohol dragster, and bought all the other parts from a warehouse that a different racer owns. But still cost$.
Alot of grinding on the block.
GM has some rods & blocks ground for clearance for most stroker motors.

[ December 23, 2002: Message edited by: 1BAD80 ]</p>

I built a 434 with scat rotating assem ,had prob 10hours in grinding the block to clear the crank and rods.
I just made a z looking spoon out of aluminum that was .060 thick
broke it in on the track in a pulling truck and loved it 8000 rpm

stroker sizes
 

454 is the most you can get out of a low deck small block.440 considered safe,,486 small block is max and 472 considered safe.

12-20-2002, 10:41 AM

This post is soooo old and stonedchihuahua was banned from here
soooo long ago.

ruth sucked me in,lol.what a waste of my time,,,jokes onme

10 years ago I built a low buck 421. It actually came out to a 419ci. I took a stock 400 crank and had it offset ground and the rod journals turned down to 2" to use stock 283-327 rods. Back then the machine shop had an awesome guy that ran the crank grinder and it just costed the same price to have the crank index ground (around $100.00). I used Sealed Power hypertectic 5.7 400 pistons. After a light cut on the deck the pistons were .010-.012 out of the deck. I milled the pistons for zero deck height. I used a .500 lift cam and didn't run into any clearance issues. It took alot of mock up and a sharp guy operating the crank grinder but it was low buck. I used Dart Sportsmen II heads. That motor was a beast.Tons of torque. That being said, I doubt it was worth doing the extra work to get 13 extra cubic inch. Just my opinion.

how did you run 5.7 piston in a block with 4.125 bore