305 Vortec to 335 stroker

[Jgoodyear4]

Has anyone here stroked a 305 (Vortec specifically), and what were the horsepower results? I have done the research and I understand I could swap into a 350 to make more power, and I am also considering that. However, I would be interested in doing a stroker on my 305 Vortec depending on the results. It would be slightly cheaper than swapping in a 350 crate, albeit less powerful for obvious reasons. If the stroker plus a few other mods makes enough power for me, which is somewhere in 300 hp range, I would value keeping the original engine in my truck. Seeing as the Vortec starts with 230 hp, it doesn’t seem crazy to think I could get it to 300 by stroking, installing long tube headers, and getting a tune by black bear. If you have any experience with this, please let me know, thank you.

 

[Supercharged111]

305 has a smaller bore and doesn't have the breathing potential of a 350. How is stroking a 305 cheaper than. 350?

 

[1997]

interesting project.
That's what makes the old stuff fun, thinking outside the box.
383 imo, would be the obvious choice, why are you thinking stroker 305?

 

[Hipster]

305 stroker pistons are more costly then 350 pistons. Parts and labor, machine work etc. You can't build one for what a vortec crate costs.

 

[Redneckgeriatric]

oversquare is always better than undersquare, unless its a tractor.

 

[b454rat]

machining/building will cost the same as any other motor. biggest expense would be the pistons as already mentioned. They are torquey motors, but just not economical, be like building a 307....

 

[Tachyon]

Has anyone here stroked a 305 (Vortec specifically), and what were the horsepower results? I have done the research and I understand I could swap into a 350 to make more power, and I am also considering that. However, I would be interested in doing a stroker on my 305 Vortec depending on the results. It would be slightly cheaper than swapping in a 350 crate, albeit less powerful for obvious reasons. If the stroker plus a few other mods makes enough power for me, which is somewhere in 300 hp range, I would value keeping the original engine in my truck. Seeing as the Vortec starts with 230 hp, it doesn’t seem crazy to think I could get it to 300 by stroking, installing long tube headers, and getting a tune by black bear. If you have any experience with this, please let me know, thank you.

I don't think you'll find a lot on this because the cost and effort don't justify the power results. Also the 305 block has some inherent design weaknesses that are hard to ignore.

If you want to do this just for fun and to try something different, go for it. But if you're looking for the best bang for your buck power, cost, and reliability wise, this isn't the way to go. A 350 swap will definitely be a better choice in that regard. A crate motor is one option, yes, but you can also go with a decent used block and a little machine work.

 

[Piratehunter]

I bought a crate 383 short block to replace the 350 in my 87 k1500. Used the 350 top end so all induction was stock, new valve/springs, long tube headers, and new chip to cover engine, gearing, and tire size changes. It was a hill climbing, tow anything, torque monster. Would go that route again

 

[cngodfather]

The absolute only reason to do it is because it is very rare and that you can say that you did it. Financially, it is a bad idea. It will be costly to do it correctly. Would be cool though. 305’s. Like to spin fast to make power. Stroker engines exert a lot of stress on the pistons and rods. Therefore you cannot spin them as fast. Therefore these situations are fighting each other. It can be done, but it won’t be cheap.

 

[Hipster]

I bought a crate 383 short block to replace the 350 in my 87 k1500. Used the 350 top end so all induction was stock, new valve/springs, long tube headers, and new chip to cover engine, gearing, and tire size changes. It was a hill climbing, tow anything, torque monster. Would go that route again

Who's short block? Just curious because when people are happy they say very little and when they're not they'll trash talk internationally lol

Evidently you're happy with whomever you got it from.