Hello everyone-Can i get some HELP (Undicided).I have a choice of Building a Stroker engine but would like Your experteec.I have a 350 sbc .30 over 4 bolt mains / and a 400 sbc .30 over 2 bolt main out of a chevy half ton. i was wonder which one i would get more BANG for the BUCK. Or i just might build 2 Mild ones. Need help befor i order my Rotating Assemblies. Thanks    

What exactly do you mean by "BANG for the BUCK?"  

Horse Power and Tourqe ?  

The larger engine will make more torque.  

Would it be possible to go over 400 horsepower with the 400. I hear 2 bolt mains r not good for high horsepower gains. Any suggestions. I heard that the machine shop can make a 4 bolt mains out f a two bolt is that true. Thanks    

1 horsepower per cubic inch is very possible for a very 'streetable' 400 cubic inch small block Chevy.

In fact, several cars in OE trim made 1 hp/C.I.D. in the muscle car era - so it definitely can be done today.  

Oh you mean a 400 sbc turned into a 406 stroker engine would not produce over 400 hp.thats what my plans were but heard that you should not go over 400hp  with a 2 bolt main Chevy Block  

Huh? What?

First things first, a 406 is not a "stroker" engine - it's a 400 bored .030" over.

Secondly, a 400 or 406 or anything 8-cylinder small block Chevy around 400 cubic inches can easily make 400 horsepower. A 2-bolt should be no problem at these relatively low power levels.  

Oh ok. i was going to a 6.000 longer rod length in my 400 block vs the standard 5.700 length. Is that possible thats why my machine shop called it a stroker engine with the longer stroke.I was going to buy and new Rotating essembly for my 350 -4 bolt -.30 over sbc with the 5.700 rod length Stroker Kit by Lunati. Thanks 4 your info  

The standard length connecting rod in a 400 is 5.565 inches, measured from the center of the small end (wristpin) to the center of the big end (rod bearing).

Once again a 406 keeps the stock spec stroke of 3.75 inches and increases the bore .03 in. to 4.155 in. from 4.125". So, a 406 is technically not a "stroker" engine. An example of a stroker engine is a 383 where the stroke is increased approximately .27" over stock.

If it doesn't cost too much extra a longer connecting rod is a fine idea, but don't expect any earth-shattering gains from it.  

400 genuine fly wheel hp is no problem for std 2 bolt block chevys .for example the last sbc i built made 410hp at fly wheel and 295 hp at wheels .G/box was manuel t/400 ,and locked 9" diff 4.56 ratio.engine was 327"sbc 0.60" over bore two bolt,750 cfm d/p with jet sizes 2 sizes down front and rear, 1" wood spacer on super victor intake ,heads were power pack with 2.02"intake &1.6" exhaust ,heads light port job ,three angle valve job , pistons were cast 10.5 to 1 comp , 0.005" deck heioght , rods std fullie 5.7" with arp bolts ,crank std 327 steel, cam  ( comp cams part # cs 292h-10) hyd comp cams 244* duration at 0.050' ,lift 0.501"int/ext ,we ran 1.65 rockers and anti pump up lifters , extractors 1.750" four into ones wit 3" collector, ran mechanical water pump and mech fuel pump ,engine ran hard to 7200rpm on dyno ,but the 295 hp was at 7000rpm ,we then ran a zex nitros plate at 100hp jets and rear wheel hp was 385hp ,which should be about 500hp at fly wheel,         this type of combo is about the border line for std chevy parts (if you want any street reliability that is, i have same engine combo in jet /ski boat in 350 cubic inch with cast crank and it has done 20 hard hours at 6500rpm / 58mph no problems  

Because the 400 has a cast crank, I'd have it checked out fully to make sure they're aren't any cracks or other issues.

Two-bolt mains will easily go up to 500 HP, so you'll be fine there.  

I really think i will drop the 400 sbc idea for now and concentrate on my 350 sbc. (383-STROKER STYLE) Any good advice on a good strong and reliable Rotating Essembly out there (Canadian outlet) that will give me between 500-550 hp for my 350 - 4 bolt - .30 over sbc.I seem to have a hard time finding a reliable Shop anywhere. I live in Northern manitoba (the Boonieeeeez)Planning on using a set of 202/165 aluminum heads and a daul high rise intake - two 600 cfm  carbs from edelbbrock. Any idea,s on a strong cam Between (mild / very loopy) This will have to run on pump gas. My block ID # is 3970010, this block produced 375 hp already before been bored .30 over. it sits in my 1984 camaro z28.Any guess on what it has now for horsepower.(I really don,t know). I won,t know what is in the motor till i tear it down this winter. Thanks  

dude you are lost aren't you?

first you are talking about 1 hp per ci everybody told you that would be no problem after you sounded very confused and now you don't want that any more you want 500 hp out of a 383.  you are going to need more than a good rotating assembly.  you sound very unexperienced.  you need to get some books and/or get a subscription to some Chevy magazines to educate your self.  this forum is not the place for a from scratch education it is a place for some help when you hit  a snag.  500 hp is a lot of hp, it is very achievable but totally different from getting 4000hp out of a 400ci.  

OH Ok well thanks to you all the helped with my question and have a GOOD-DAY.