covid is sure bringing out some strange ideas....
Most likely the Pistons would come out of the bore enough to hit the heads, you can't just throw in a stroker crank without matching the rest of the rotating assembly to it, one of the reasons they sell kits to avoid mismatching of partsAt top dead center, if the crank stroke is longer, the stock rod and piston stick up that much higher. Odds are good you run into an open valve. Need corresponding pistons with the wrist pin location moved up to match.
The stroke/displacement is only part of the issue with smog motors. The other is the heads, cam and exhaust.
The reason, imo, that the LS platform is taking over is not because of cubic inches, but rather head flow. Making 400 hp with a 325 ci LS is easy. Throw in the bonus of a full 4 bolt main setup with buttress bolts.For a NA build, maybe you can make some headway, and many people including people here are extremely happy with a 400 hp motor that is driveable.But at the end of the day,‘stroking’ a motor isn’t worth Bo Diddly with a stock head and cam.
It just doesn't make sense. Why would you go through the disassembly of a 305 or 307 when you can just transfer accessories to a 350 (or 403)?
If you are going to keep the Gen 1 engine, start with a 1987+ roller cam block, and use Vortec iron heads. Summit sells a prepped block, and you can put in a cast stroker cam, the pan rails have already been relieved. Although you will now need a Vortec intake and may need a ‘melonized’ distributor gear if you choose a steel cam, everything else swaps from your 305. I think the Summit block is drilled for a fuel pump.
I have no claim to being an engine stroker expert.
But,I dont think that stock pistons and connecting rods could be used with an increased stroke crankshaft.
I believe that either piston pin height or rod length would need to be changed to accommodate a longer stroke crank and to properly locate the piston top in the block for the desired deck height clearance at Top Dead Center.
Just my thoughts.
Guy
Best "quick" solution I could think of:
383 Small-block - Lethal Weapon Project - Top Gun - GM High-Tech Performance Magazine
Check out this installment of our Lethal Weapon Project! See how to install the AFR 195cc SBC Eliminator Street cylinder head to a 383 small-block. Building any engine from scratch requires a significant investment of both time and money, and this time we're certainly reminded of the effort...www.superchevy.com
Stealth TPI Induction - L98 Stroker Installation - Super Chevy Magazine
This Chevrolet L98 TPI engine has its displacement stroked to 383 cubic inches and has stealth mods installed including a new cam and an extrude honed tuned port injection system to make 458 HP - Super Chevy Magazinewww.superchevy.com
Oh wait... that isn't even close to how silly this proposed concept is. An engine is an air pump, it doesn't matter how much displacement it has if it cannot flow air in and out efficiently.
If you are going to keep the Gen 1 engine, start with a 1987+ roller cam block, and use Vortec iron heads. Summit sells a prepped block, and you can put in a cast stroker cam, the pan rails have already been relieved. Although you will now need a Vortec intake and may need a ‘melonized’ distributor gear if you choose a steel cam, everything else swaps from your 305. I think the Summit block is drilled for a fuel pump.
If you are going to keep the Gen 1 engine, start with a 1987+ roller cam block, and use Vortec iron heads. Summit sells a prepped block, and you can put in a cast stroker cam, the pan rails have already been relieved. Although you will now need a Vortec intake and may need a ‘melonized’ distributor gear if you choose a steel cam, everything else swaps from your 305. I think the Summit block is drilled for a fuel pump.
It's not the size of the wand but the magic in it.
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