Think aobut building a 383 stroker

[BDIDDY 10+ year member]

some of the chevy400's sucked because the walls between two of the cylinders was too thin. this led to problems. i dont know which years they were. if you took a 350 block and just put the 400 crank, 5.7 rods and stock 350 pistons in it would be 377 c.i. to make it a 383 it is the same parts but!!!! the motor is bored out .030 larger( slightly larger bore gives you the few more cubic inches and you use .030 larger pistons. but reguardless, you can have all the power you want out of a plain old 350 believe me. it is easier to deal with any parts you end up wanting to change, you will get the experience of building a motor and beating it sensless. btw. the last fast car i had was an 82 firebird se with a 350 .030 over bored, a comp cams 268h grind cam, 9.5/1 keith black pistons, chevy pink rods( lt1), an old set of 194/160 chevy heads with a mild port/gasketmatch, a 69 z28 replica intake manifold, and a holley 600cfm with vac secondaries. i did a 380 hp at the wheels which equates to about 430 at the crank and i built it myself!

What are the positives of building one of these over a regular old 350? Just alot of torque? Would it be worth it to bore it out more than 30 over or does that kind of cancel stuff out? If I was gonna build one and bore it out I would definately bore it out more than 30 over. If you bore it out enough should you just build a 400 with 350 heads or does the 350 have thick enough walls to bore it out enough to make it bigger than a 400.

Thanks again..

 

[dbhittin 5,000+ posts]

me and my friend took a 327 block and put 305 heads on it, and it screamed for about an hour tell it blew up from all the burnouts we did. right now im building my motor 2.4 KA24E doing bored .40 over 9.1 comp, but its gonna be at 9.5 with shaved head, 3 angle valve grind, polished forged rods. gonna be a burly 4 banger

 

[analogkid]

the few cubes you gain arent for displacement as it is sucha small gain. usually a motor is bored because it is a used block you are using and it will more than likely have ridges in the cylinder walls that a hone won't eliminate. another thing that is missed alot and this applies to any motor biuld is that a used block in alot of cases is better to use than a brand new casting. this is because the block has heated up and cooled down to the point where it has settled in. it wont expand and contract with heat as much as a new block. the only catch with a used block is that you have to take it to a shop have it cleaned and magnafluxed in order to assure its not cracked. as for heads, the heads you pick to run will be based on 2 major things( 1. combustion chamber size/shape) this will detirmine your final compression and different designs will direct the air in a less turbulent manner making more power. (2. volumetric efficency) this is the volume of air that a head's runners can flow. if you put 305 heads on a 350 they will fit and more than likely bump up the compression but, they dont have the flow capabilities of the stock head so you will lose hp capability. this is not set in stone as there are many different designs. but this is just an intro to a little motor theory.

 

[bottwell666 10+ year member]

why not just take a 400 block and put a 350 crank in it you will

have to use main spacers but it will rev like crazy and outdo a 383 any day of the week but 470 hp from a STREET small block without a blower yeah right dream on unless u got a shit load of cash