4.3L V6 VS 4.3L V8-WHICH OTHER GUYS MAKES A BETTER BUILDER?

I've been wanting to put either a 4.0 or 305 stroker in a 1998 Chevy Malibu rear wheel drive conversion. Maybe take a rear end out of a 98 Camaro I know I would have to fabricate that would be something different

Try the 4.0 inline 6 add that into the mix with those three instead of just two it would be a better show because the inline 6 is more torque than a V8

Still waiting for the lt1 302 vs lt1 305

Chevy had to come out with a smaller V8 because some agencies would write the bid spec to favor Ford by specing "V8 engine, displacement no larger than 4.6 liters". The Caprice had a 350/5.7 so GM adapted. Ford could do anything when an agency spec'd a "V8 engine, 5.0 liters or larger".

I was told it was a 4.6 v8

There was once a time I would've prefer theV 8, today I prefer the V6 the technology is in a bundance everybody and their grandparents sell chevy V8.

There's a couple of guys, father and son, named Ernie Neal, running the little V8 Caprice in Super Stock. It's pretty competitive.

I have a little 4.3 Vortec V6 on the engine stand now. It has been zero decked, has hypereutectic Speed Pro 350 four valve relief flat top pistons, it's been balanced, bored and honed with deck plates, the heads have been milled, pocket ported, and have a three angle valve job, with stainless valves, screw in studs, and adjustable 1.6:1 rockers. It also has a Crane 214/222/114 hydraulic roller cam, should be over 0.500" lift. The Vortec EFI intake may hurt HP, but I figure it will make 250+ for HP, and about 300 ft/lb for torque. If I build another, it might get small dome pistons, and a little more cam. They're great little engines, and at around 250/300, run strong and get great fuel economy. Honestly, it's probably a lot better than a V8 swap for anything but all out racing.

Is the oiling system in the L99 the same as traditional small blocks from Chevrolet ? If so that is a MAJOR design plus in my opinion. 4.3 v8 for the win....

My current daily driver is a 2000 GMC Jimmy with the last generation of the original 4.3 V-6. And while it's held back by being in a luxobarge 4×4 four door SUV, it makes more than enough torque to get with the program. Power Nation built a hopped up version that made over 250 hp and almost 300 lb ft of torque naturally aspirated.

10 Minutes into the video and still no comparison between the V6 and V8. That IS the subject, right?

For racing more cylinders is always preferred, for hauling things less cylinders with bigger displacement works best.

Richard do you remember what the port and valve sizes were for the ported heads used on 4.3 V8 used on another test?

I’ll take the 4.3 v6

I've seen 4.3 V6 turbo engines exceed 500 hp at the crankshaft. The V8 with the same package should beat that by 150 hp.

Just remember chrome valve covers adds at least 50hp no matter what size it is (lol).

ahh u can get the LT1 350 in a caprice classic and the caprice LS from 94 to 96, the 4.3 was the basic motor

I'm more into max hp without boost and less weight, less parts for 375 hp range. Would like to see what can be done with the latest version Vortec v6. What is the total cost per hp? What is the longevity comparison? What works best with added hybrid tech? The cost of petrol will likely double as more EVs hit the pavement. It's the capitalist way! Toyota's hybrid Rav4 proves point.

Did you happen to see the Power Nation Video when they added the turbo. then turned it up to13.8 Psi Wow over 500 Toque and 487 hp I'm guessing about all the little motor can handle but that's awsome!!!

BALANCE V8

4.3 liter v8

I had a straight axle swapped s10 with the 262 small block that had a cam ,intake ,carb. It ran great ,revved to the moon. It didn't have any trouble spinning 42s.

I always thought the 4.3l v8 would be neat to put in a 55 or 56 chevy that originally came with a 265V8. This 4.3 is the same size with an inch or two. it'd be neat when people see it to tell them it has a 265V8 (baby LT1)

Or a 4.3 v6 gen 4, or 4200 Atlas

Ide like to see a video where they take awful engines like the ht4100 and build them into monster engines with huge power. Would be cool to see a iron duke with 700 hp 😆

600 straight 3-cylinder

Wasn't it the 4.8 v8?

I remember I had a giant Chevy van 4 captain chair,s & a couch it was like driving your living room around it had a 4.3 V8 it was a tank I remember driving home from baseball game and had 8 people in it and it was doing like 80 with no problem

From what I know small bore, short stroke V8 engines are great for turbocharging, twin turbos would be best and the V6 would be better supercharged. Great comparison video. What I don't know, can the 4.3L V6- 3/4SBC be stroked or destroked, like the SBC 383? If so, it would be be a better for turbo applications.

8

Given that choice, I would take the 4.3 V8 every time. I have always regarded 90 degree V6 engines as lousy compromise. The primary reason for their existence is to share manufacturing investment with an existing V8 engine family. The NVH is lousy, so it needs a balance shaft... additional complexity, cost, weight, and friction that adds nothing to performance. I like V6 engines, if they are 60 degree, inherently smooth(er) to start with.

I would go for the V6 engine just for the exhaust sound, MUSIC, MUSIC, MUSIC!!!

the l99 was used in b body cop cars with 9c1 rpo

one more small gm motor that i did build up in 82 was the 260 v8 olds from 77 era. stock was 110hp/98tq, after i was done , it had a 455 alum heads , forged /balanced internally in a 3600lbs pontiac parisian did 8.8 1/10th

In a wedge engine large stroke equals large torque, and large bore equal large horse power, now a 305 is the smallest bore chevy made in a small block but pushing it with boost and the small bore does not hinder the engine anymore, I hear of a guy running a 366 big block engine running in the 9's in quarter mile in a first gen Camaro, yes he could go faster for easier with a 454 or 427 but boost will overtake any air flow problems you could dream of

Don't buy a 5.3 V8 after 2018 a guy at our gym had one that had a catastrophic engine failure with 26k on it. He isn't the only one I know about. It's that stupid engine that shuts off cylinders then the cylinders not firing doesn't get lubricated properly. All he was towing was a two stall horse trailer at the time that's not much weight.

The 5.7 has a 1.94 intake valve

I have a 4.3 v6 with half a million miles on it still running strong

One of my favorite sounding V8s is Ford SHO 3.5 liter V8 . Too bad either the camshaft/ crankshaft would fail destroying the engine .

I only knew of the 4.3 turbo cyclone & typhoon

All the commemts talking like this was justified? WTF.. imagine being this petty how sad

The L-99 was part of the "Police Package" in 1975 Nova (city cops) Rated at 200HP.

I had a 95 Caprice with the L99. I put a cold air intake on it and a Borla exhaust. Making it breath better provided more than adequate power and great fuel economy.

The V8 is more naturally balanced v6s are horrible for balancing

ok,,ok,,OK!!!! YOU HAVE FORCED ME TO DO THIS!!!!!!!!!!!!!!!!!!!!!!!!!!!!! OK,, OK,,,, ILL TAKE THE 632 10'3L GOSH!!!!!!!!!!!!!! PUSHY IN YOUR OLD AGE!

I used the crank from a L99 in a 350 roller cam block to make a 302 for my dad's 57 Chevy just like your talking about. Its spicy AF.

A dz302 is a combination of 283/327.

Dude talks waaay too much on to many topics to cover just two.

nothing confuses Chevy guys more than 4-liter engines. the 4.3 V6 in everything, the 4.3 V8 in Caprices, the 4.2 inline sixes in the Chevy Trailblazer and related vehicles... and then the new gen 4.3 V6s totally unrelated to every other engine Chevy has ever made...

I had the chance to build a 1996 vortec v6. I don't know the flow numbers but I did do a valve job along with a boring over and port and polish. It broke two 4l60es. I used the stock intake with upgraded mpfi and a street legal tune and kept the stock camshaft. I need to find a performance dyno to get the numbers. It did do 10.01 in the eighth mile starting in second gear with a 12 inch wheelie though.

I would go with the V6. It’s a small package with decent power that can fit in shorter hooded imports or newer cars.