We absolutely enjoyed our 1993 Typhoon 4.3 turbo build! But investing so much $$$ to be limited by the “Split-journal” crankshaft was defeating. The NASCAR crankshaft castings were the cure, but nobody supported the platform. So, after bending the 4.3 crankshaft around 650hp, Richard decided it was time to LS swap the Typhoon. 👍

1:26 200hp from the old push rod V6 was impressive in 1996, back then the Ford Mustang GT was making 215hp with its new OHC V8.

The VORTEC 4.3 started in 1995 and was in trucks all the way up to 2005

I've had about 6 s10 pickups with 4 having the 4.3. It's definitely the best engine the s10s came with. I liked the original style TBI engines the best. My 92 4.3 s10 ran way stronger than my 02 4.3 did. They both were standard cab short beds with 3.42 limited slip rear. The 92 ran 4 tenths better then the 02

The Atlas engines are majorly slept on

Port flow is everything. The LS/LT V6 has the same large improvement as the LS was over the Gen 1 Small Block.

GM had a 4.1L VVT pushrod 60 degree V6 ready for trucks, but it was canceled in the 2009 bankruptcy. It made 250-260hp and close to 300tq.

That LV1 / LV3 V6 with a cam and boost should be an absolute rock star!

I remember reading about an S10 with a stock 4.3 running 12’s on nitrous, pretty impressive engines for what they are, all of those 6 cylinders are impressive in my opinion, lot of stock small blocks from the past that don’t make that much power or torque.

Too cool, I was just reading about the new 4.3. Shorter than a V8 means more room for intercooler!

Luving your channel! I have a 2003 LU3 with close to 200K and it still runs great!

Vortec 4.3 was actually an option on Chevrolet s10/blazer(also gmc Sonoma and Jimmy) going back to 1991 was the earlier cpfi motor and were a little notorious for issues with the spider injectors

The Vortech 4.3 heads came from the original 4.3 turbo motors that were in the cyclones and typhoons that’s where the design came from the TBI VERSION started in 1987 or 88 and went thru mid 1995

Enjoyed the info on GM V6. I used to have a 1975 Nova LN with a 4.3L V8. Carburetor, not EFI. Got into a lot of arguments on this! Keep the the good videos coming.

i remember the l99. came in the early 90s caprice. we worked on one in auto class. remember a guy has one swapped into a single cab, long bed s10 with a turbo on it in the late 90s. kind of an oddball engine but can be found if looking hard enough. atlas was a good engine but gm messed up when they designed the colorado too small and couldn't fit that engine in. there is a reason there are 2 versions of the 4/5 cylinder engines and why they dropped a 5.3 in later on. another great video.

Thank you this ultimate GM other guys comparison!

Interesting comparison between the 4200 four valve and the LT type 4.3 with two valves per cylinder. The newesr V6 is no joke and the BTR cam makes it even mo' betterer.

Seeing the way how the newer V6 performs It makes me scratch my head as to why the folks at Mopar never produced a V6 version of the 5.7 Hemi. It would sit right around that 4.3-ish displacement and be a better option for use in the Ram 1500 or the other vehicles where low end torque is ideal. It fits that area better than the 3.6L IMO. A 4.3L V6 and a 4.8L I6 based on the 6.4 Hemi that could handle more abuse would probably be a good solution to keep that architecture alive.

Richard, don't forget GM made the 262 V8 back in the 50's (first iteration of the gen 1) and they also had the lamest 267 V8 gen 1 in the early 80's.. these plus that L99 makes 3 GM V8's that were 4.3l displacements.

I drive a 95 impala. So I actually know about the v-8 version. I have the 350. But I still run the optispark and tune the stock software. They only wrote the tune for those vehicles for around five years and then obdii became mandatory in 96 and changed everything again. So there’s not a lot of tuning support with the v8 version Pryor to 96.

I'd love to throw that LV3 in my '91 S10 Blazer. I think it'd be a great combo along with a 6 speed

The 258cid Jeep 6cyl just called (4.2L) ... Judging from the way my 81 CJ7 fell on it's face and wouldn't hold highway speeds on mild hills after I installed what I thought was a conservative 32 inch tire upgrade.. perhaps better that it didn't attend the party.

This video was dope! I been wondering how a v6 could beat a v8, maybe sharing displacement is a start🤔

Love the 4.3 Vortecs

And the monza,Malibu 262 in 75 and 76 that was soooo anemic that chevy killed it after 2 years. But it is a good source for a large jounal 3 inch stroke crank..

There was also a mid 70s 4.3 litre V8, the 262 cu in used in the Monza & Nova, only for 75 & 76 as far as I know. 3.67 bore X 3.10 stroke. Had one in a Monza, originally rated 110 hp, 205 ft-lb I think. I put a Street Dominator and a 500 cfm AFB on mine.

I have a 2003 chevy express 1500 with a 4.3, I'm very have with it ..

great video

Hey Richard when are you going to test a 3.0 or 3.2 Taurus SHO V6 from 89-95? The 3.4 SHO V8 would be interesting as well.

I really like the smooth Alas I-6. Actually a real reason for a tachometer and automatic transmission. Yes before you hit start button again. Check the RPMs it may still be running. Quite and no vibration. Imagine such a thing. HP is nice. But if you decide to drive 600 miles in one day. You really get tired of high HP noise. It would have been nice to see what a 3rd gen head would have been like. BUT it was 2 cylinders to long for anything GM had in mind for 2010. But Stellantis is bringing back a I-6 for the Jeep

THat new L v6 will set you back a pretty penny. You can do some mods to the Vortec to get those HP ratings easily. Cam, exhaust and even some head work. By the way, the Vortec went past the year you said they were produced. I have a 2K' S10 that came with it. I'm pretty sure they were in production until 02'- 03'ish in the S10. Not sure on the Astro Van.

I had a 96 S10 SS but modded it though. Was making somewhere near 265 Horswpower with the mods I did.

The L99 is true the police near me bought them and the Sheriffs Office and Troopers Ordered LT1. Big difference in power.

Where can I find a deep oil pan for a 85 model 4.3 I am trying to put a 1985 engine in my 1991 S10 4x4 and my oil pan will not work to different 4.3 engine

Pretty sure the LU3 is basically the same and went to 2012 or 2013, maybe even later in some vans.

I had a 1994 GMC pickup truck 8-ft long bed with a 4.3 V6. That thing was horrible anytime you put any weight and behind it the gas mileage went way way down to almost a single digits. I'm going up any and every Hill you lost 10 to 15 mi an hour at least if not more. It was so bad I eventually went out and bought a brand new cargo van with a 350 cutaway with a service bed in it and just used the pickup truck to do dump runs. That was the only thing that was really good.

There's a 4.3 conventional small block from 1975-76 also. Had one in a Monza. I think it was rated at 110hp.

I think buddy had his production years wrong with the 4.3 vortec how was 95 the last year when the last year s10 was 2003-2004 ?

ITBs would be pretty interesting on the LV3.

The two variations of the 4.3 the OBD1 era cpi injected was beyond the obd2 mpfi version. Cpi was exclusively for the 4.3 and shared nothing with the V8 but bore and stroke and created more power than the V8 and all 4.3's created after OBD1. GMC took it up one more notch and held a 26 year record with it shaving Corvette parts and adding turbo. Obd2 killed it when it was agreed upon to incorporate a single style fuel injection to aid in universal coding from the top manufacturers the obd2 version became a mini me of the 5.7. pre 96 and post 96 both vortec but completely different animals. 5.7 became a vortec because of the pre 96 4.3 and every vortec after and still til this day.

I wouldn’t mind a 4cyl atlas in an awd Colorado if I could side by side it with a ms or if the trans plays nice with control

I wonder what the head flow data for each is especially between the 4v 4.2 and 2v LV3

Would you be willing to run pentastar 3.6l from the charger/challenger/300? I'd love to learn more about it

is it possible for a lv3 intake to fit on a lu3 or should we just stick with the performer 2114

I'm thinking the new V6 with ring gap, premium head gaskets, head studs, supplemental port injectors, BTR cam/springs and a turbo will make a reliable 1,000 flywheel hp. That would be a super cool engine in a small package. Who will be the first to do it???

The Vortec 4.3 lasted until 2013-14

I think they made the L99 because they were making all the Blazer V6's they could for their hot selling SUV's. I also wonder if they originally wanted to run a 305 in the Caprice but found an LT1 style 305 too close for comfort to the LT1.

thats really cool to see how displacement, design and tech can all impact these numbers. odd side question: do you ever plan to switch to rumble? i could then listen while i drive or do other stuff in case im not able to watch

Are there any new camshaft options for the LV3 4.3? I am looking for swap options for my Miata and the V8 makes the car too nose heavy. I want to keep the high revving character of the car but with more N/A power. Turbo is great but not for this application. It would be great to see something that would let it rev to 7000 rpm.

Can you add a GM LFX (or equivalent High Feature GM v6) into your v6 testing mix? It's become a very popular swap engine for miata/RX8/etc. and there is not that much scientific info out there about them. Thanks!

i have the same setup as the first engine in my pinto ..i am about to try to make it a 5 speed .. it has a turbo 350 now ..

Rich you made the comment that the 4.3 v6 was based off the 350ci v8. What I thought was interesting was that in your configuration, the 4.3 made better numbers than the L48 350ci and close to the L82 350ci found in C3 Corvettes of the '70s and early '80s.

Why didn’t you test a newer 4.3 out of a say 01+ Chevy s10

I’m just waiting for the Ameri Barra Big Bang

First off I must say I love all the content, personally I learned a lot when it came to my 5.9 360 from your videos some upgrades that I have planned for that build. My question is, I just bought 2003 Chevy S10 Blazer extreme with the 4.3, I'm not sure of the horsepower rating on it I believe it is the 190. what are some upgrades that I can do? I know compcams has something available up to a 2002 4.3's advertised,but from what I see it should still work in my 2003(part # 56-440-8). What type of upgrades would you suggest for performance as this is my daily driver,but I would like to get it to run a little bit more stout if able?

VVT is nice until it's not when it breaks. Too much such crap in/on the engines now. They claim it's to improve performance but it's really to pad their pockets. Look at the problem direct injection engines have. I had a 1977 351W , stock compression, cam, heads and all I added was a Holley 600cfm, Torker II and duals. 20mpg at 80mph and would spin the tires on a 30mph tromp, stock rear gears from the factory. Then I was transferred and couldn't finish my plans. But we definitely don't need the government telling us what we can and can't drive. Definitely don't need computers and other stuff in our cars with the only purpose is to drive up the cost of operations and to break at an engineered time.

How about the old 262 Chevy, 265 Chevy, and the 260 Olds? It would be a painful, but interesting comparison (if you could find one of each to test). I know the Olds was only rated at 110HP and was made from 1975 until 1981. Stay away from the diesel... lol.

I'm interested in how much power gains a cam and bolt on parts would produce on the LS V6. How far can the injectors fuel it.

Have you gotten a chance to work with GMs HD 6.6 gas engine L8T? Heard it has a lot of potential for power and it’s an iron block with no AFM or DOD

I had a 63 gmc with a 305 v6 in it

Like, share, subscribe, ring the bell. Do all that stuff. He'll keep testing

Any videos on the LF6?

Does the older V6 4.3 share the bolt pattern architecture with the LV3? Original vortec

These engines have huge power differences. But I'm still curious about how much they all weigh. On another test where the engines are pretty close, weigh could be a much bigger factor if there is a big enough difference.

Hi Richard, love your content! Quick question, I have a 3.7 (NA) in my f-150 that I raced ( kzfaq.info/get/bejne/fpphhM99ltLTo3k.html )and it shifts at 6750rpm!! I tried two other 3.7's and they shift at 6750rpm too (tach bouncing off 7000) With aluminum block and heads, 4 valve per cyl and DOHC its no wonder it puts out 305hp. Could you dyno one and even add boost to see what this will do please? Considering putting one in my 83 mustang gt. Thank you!

Hey how much would you charge to rebuild a 3.8l v6 supercharger out of 2002 gtp 40 anniversary limited edition

Very interesting to see this stuff. Smaller packaged engines have my attention with my Jeep build. I still have the 4.0 but I'm always looking for a cheap alternative that produces more torque per liter while still being not super expensive. All builds are budget builds. Although I'm sparing no expense for the frame and body (TDK frame with an all aluminum body). Damn is it expensive so far. But still cheaper than a new Jeep.

I'm looking at a brand new Chevy Express Cargo Van but not No BS 4.3 L V6 junk. No not at all. I want the 400 small-block 6.6 with 401 horsepower and a locking rear end and their bulletproof 6-speed transmission.

ATLAS Best Girl followed by side girl L99. Eh, who a my kidding, scrap the Baby LT1. ATLAS it's the only way to go. P.S: I want to see that Fancy V6 SCREAM MURDER in the Dyno on a Big Bang configuration and learn where is it's weak spot(s).

What happens next, electric version!!!?

Is the 2008 LU3 a good 4.3 engine?

whyy wont you slap individual throtle bodies like the bmw s54..that would open upp for better intake plenum or box and better air intake

But, what about the 4.3L V6 Olds Diesel?! :P

Richard have you ever run a Cadillac Northstar ?

How about a boosted 4.3???

I drive a car with a 4.3 V8. I love that thing. Not a gm though

💜💜💜💜💜💜

You gotta try and get ahold of a 3.7 Ford V6. They are pretty stout na. The only v6 that really continues to impress me after my 3800.

Take a stock 350/5.7 Vortec block and heads and stuff it with the 4.3 V8 crank and rods, using the stock 350 pistons. This would make a 302/5.0 Chevy. Then compare it with a stock 302/5.0 Ford engine. Use both engines as a base starting point then build them both up using comparable cams and intakes etc. Would make for an interesting comparison.

And just think the 4.34.3 l V6 is a 265 in³

3D printing an intake manifold...I can't wait until that's a thing. My Astro has the Vortec 4300 but there's no cheap EFI manifolds. I'd love to turbo it but the expenses of a carb intake and an EFI based carb just don't make sense financially. I'm just going to LS swap it instead.

Now do Ford v6's

The atlas motor sucks I like the old 4.3 v6 that was in the Chevy ASTRO bad ass engine all I know is when it was in a gmc cyclone it was faster then a Ferrari back in that time so I don't care bout this new lve lv1 or gay ass atlas the original 4.3 was a beast and still is a beast to this day.

What's going to happen next at GM? Bye ICE. 😢

LU3 replaced L35, LV3 replaced LU3

The V8 has 4 more ports and valves to breath through!!!!!!

Personally I blame squirrels

Iment to say a 4.3 is a 265 ci

Now 260 olds lol

I'd take the older gm 4.3 all day the new stuff is shit!!! I work on them all day don't get started on the the ford 3.6 or transmissions... 70k miles and smoked meh

Hey man i would love to ask you some questions i really need your expertise but i can't find your email on Google. How can I reach you?

Forgot you were the motor guy.... lol, I'm out.