okay, so i was reading a sbc horsepower book and came across some interesting info that may apply to our 262 motors.

if you take a 350 sbc and change bore to 30 over and 6.000 connecting rods, it changes the compression height to 1.45 - ending in 382.6 cubic inches of stoked engine

similar concept applied, those same pieces should go straight into a 262 block, and very rough estimate of like 274 cubic inches.

now that, and maybe use some higher compression pistons, new cam and valve train -

it might be possible to find a 9.6:1 compression and 7500-8000 red line if my numbers are in the right places.

would it work though? and would the gains be worth it?

i'm reading a book on horsepower gaining and the stoker / de-stroked chapters caught my interest hardcore. now i'm curious.

 

Ever since learning of the similarities between the 350 and the 4.3, I've wondered about similar things. I keep coming to the roadblock of could the crank/bearings handle it?

 

yeah, thats were i am, and with that much work and money - you dont wanna guess and be wrong.

 

Try it and let us know jk. My reasoning says it would work, but my reasoning has been wrong in the past.

 

i would think that it would work just fine. The bearings are probably the same as the sbc i've seen 4.3's push 300 hp with blowers and hold up.

 

very interested, keep this train of thoughts going, i would consider doing it to my engine when i need a rebuild...

 

Ah the V6/8 ponderings, picks at the back of the brain of anyone that owns a 4.3 at some point. but really in my opinion I feel it would work as a street truck, not 100 about a drag or racer. For the work involved wouldn't a 5.0 302 swap be easier? Even then most say if your gonna swap to do the 5.7 350.

The two things that hurt the 4.3 is the gear combos and camshafts. My buddy has a 94 fullsize with a vortec 4.3. With 35's, 4.56 gears, and bolt on mods (air intake, muffler, tb spacer etc.) it performs incredibly well. Just my own thought, if I had the time and money. I'd do cam, gears, heads, exhaust, your bolt ons and them maybe forced induction(if you'd want). Then there is the other things that could be done with port and polish and engine internals. I feel that it's the personal opinion. Do you
want to swap a V8 for guarenteed power, or invest time and money into a V6 that would catch nearly anyone off guard?

Wow, just read that back, sorry for the lecture! lol just my opinion, some one else might have better or more your style ideas.

 

heres a thought to think about as well, i figure, and am probubly way off on this, that you would be up in the 250 - 300 hp range with the high compression, high rpm range and all the added inches - however the torque should skyrocket over another 300 hp build like the 3/4 350 article.

and the thing about the 350 swap is that your adding a lot of weight, changing plenty of wiring, motor mounts, and losing all the extra space in the bay.

the idea i see is basically creating a V8 mini motor. Same mounts, same ECU, Its all already there.

and it would still have the V6 sound - so it could surpise a lot of people, and you might be able to hussle at the track a bit.

 

http://www.hotrod.com/techarticles/e...ild/index.html

Nuff said

 

yeah, thats a great article and i have read it time and time again. but the ideas im trying to seek out here differ from the article. there are other gains to be found. and maybe these ideas with those can make for a great 400-500 hp mighty mini chevy V6.