In my personal opinion I like the 4.3 vin w . I have a 94 s10 blazer 4x4 and it has plenty of power I 've had this blazer going well over 100 miles a hour witch is faster than my buddys pos Accura integra . But I will be doing a SAS soon and bigger tires so I will be going with either a 305 or 350 not sure yet .

 

300hp? try over 1000!! http://www.youtube.com/watch?v=KkglxJH6jGE

 

Yea imagine the cost involved in building that engine , I'll take one though .

 

I think it would be tight to do something like this with a 4.3 but would probably cost a ton.

edit just noticed someone already posted the video I was talking about.

 

Yup, even the pre-programmed PCM & I believe Al at Wynjammer has them listed for $2557 USD but may be less if you get your PCM flashed for the needed fuel & extra air (6 psi). That being said you probably will need to get the upgraded spider assy. $450 from Al, for the extra fuel needed so it doesn't lean out under load or at higher revs. Mine leaned out at 4500+- & also under load while hauling the boat at highway speed. But it does move like hell with the extra 40 or so HP at the wheels.

 

http://www.youtube.com/watch?v=R9dA0jTDGR4
http://www.youtube.com/watch?v=ahThCr5hEeQ
http://www.youtube.com/watch?v=WHl2al3bvIY

I'd like my blazer to sound like those...and I'll be saving up money for the vortec heads and head work, the cam, the headers, tune, etc.

 

I have put a lot of timebin money in my blazer and if your looking for power its not going to be cheap. I have almost 4k invested in my motor and still not putting 300hp to the wheels. I've replaced about 95% of my motor with performance parts and I'm putting down 265hp to the tires.

Oh and for cams I'm running the comp cam.

I will be supercharging and adding spray soon. Looking to punch out around 400hp

 

Wooo Doggie! Then she'll rip!

 

J rob, that makes me sad. I was going to pick up a used 4.3 from somewhere, and throw a cam in it, get it cleaned, new pistons and such, and i was hoping for 300hp.... guess thats not going to happen =(

 

yeah my quest for 400+ naturally aspirated horsepower is not gonna be happening with a 4.3L I'm gonna get a LS v8 like a 5.3L and run with that.