11/19/2022 0 Comments Ht60 on stock big cam 350Obviously, I can't run 87 or 89 octane in it and even the 93 I'm getting from the pumps lately is getting suspect, as I had to back my initial timing off from 16* to 12* initial. If I had stroked it to a 383 or even a 406, I'd be closer to 500hp, but probably not hitting it, figuring on an added 30hp from the 383, 50 from the 406, and that might be optimistic. I probably have about $2500 in this engine, and I'm guessing it's making about 425hp or so. I reused as much of the stock Vortec parts that I could, keeping in mind what my intentions were with the car, which is a streeter that sees some fairly regular hard pulls. I picked up a Comp XR294HR cam, traded a Torker II intake I had for a Performer RPM piece, bought a new Holley carb and dropped it in. I got a set of new Edelbrock Perrormer RPM heads for $800, had them cleaned up a little, installed scorpion 1.5 rockers, comp springs and solid pushrods. I put a new timing set on it just to be safe. I installed all new freeze plugs just to be safe, retained the Vortec crank and rods, installed a set of Keith Black 10.8:1 pistons I got cheap as a customer return (not easy to find stock displacement pistons over 9.5:1) through a local speed shop and used ARP bolts in the bottom end. I got it complete from intake to pan for $150. It had popped a freeze plug, so the owner elected to put a new motor in it (!). I scored a complete vortec 350 out of a 10,000 mile 98 Chevy pickup from a buddy who was a GM service tech. Not a really difficult task in and of itself, but doing it cheap and with low compression is. You need to make 1.4 hp per cubic inch on a 350 to get where you want to be. (seems like round and round we go on this.) Bottom line is, that a 500hp sb is doable if you know the right people, have the right parts, and have the required talent, but for 3k or less and have it streetable, and on pump gas, it's not gonna happen unless your name is john kaase or smokey yunick. You could use a head with a large combustion chamber to lower the compression ratio, but open chambers are less efficent, and will hurt power. The more CI from a stroker raises the compression, that also raises power, but at the cost of not being able to run pump gas. You can stroke a small block, but with stock style iron heads you may raise the compression to a point of detonation issues on pump gas. Plus a Big block has the size advantage for HP and Torque. A big block by nature has more potential in stock style iron heads to get you the numbers you want. The problem with a SB is head flow and compression. I wish I had a dollar for every 500 hp small block that I run across, that my 400 earth hp 347 (about 5k in it) takes down at the drag strip. What You'll have is a high winding SB that pings on pump gas and comes alive only above 5K rpm. To do this with a small block, it will take the three C's, Cam Carb and Compression. No way no how is a typical SBC gonna make 500hp for under 3000.00 and meet these guidelines. Low compression, real world streetable engine. The OP stated he would prefer, (but no limited to) a SBC. And going with Yamaha outboards means going with innovation, performance, and legendary reliability.So are we talking earth HP, or up in the air theoretical digital HP? If you want 500hp pump gas earth HP, you set up some real tight guidlines. No matter what model or horsepower class you go with, you can count on it to get you where you want to go. Yamaha's large selection of four-stroke motors ranges from the nimble portable models like the F2.5 to the larger horsepower models such as the V MAX SHO or V8 Offshore Models. No matter if your planning on fishing the waterways with friends or cruising your local lake with the family, Marine Outboard Motor has the perfect Yamaha outboard for sale to meet your needs. And that's exactly why Marine Outboard Motor stocks the full line of Yamaha outboard motors. They strive to make their outboard motors faster, more efficient, more reliable, and more enjoyable. market, they have relentlessly pursued the goal of a more satisfying boating and ownership experience for their customers. Ever since Yamaha outboards have been sold in the U.S. Reliability, performance and innovation are the hallmarks of Yamaha outboard motors for sale at Marine Outboard Motor.
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