4.3 vs LS Reliability

denny

Active member
People keep saying swapping in an ls motor for reliability.

How many have LS motor and are beating on it the same way they use to beat on the 4.3 and can verify the reliability of the LS swap.

Everywhere you go everything is having a LS swap, seeing LS in every car. Is like everyone having the same haircut, wearing the same cloth.
 

Matt

Active member
Re: 4.3 vs LS Reliability

keep it V6 :tup: LS or V6 if you abuse it it will eventually break, it is cheaper to built a LS to make big power ask me how i know :lol:
 

gt67sy

Member
Re: 4.3 vs LS Reliability

bowtie all the way. I could have went to an ls just like Matt but V6 is what they came so V6 is what shall remain
 

nickerz

Member
Re: 4.3 vs LS Reliability

Considering you can do 550whp on a $400 grenade motor, 650whp on certain truck motors and 750-800whp with some light supporting mods and 1000whp for not much more the advantage is there. Not to mention some people don't like having only a handful of vendors to work with, long lead times, questionable part availability etc.

LS is the new SBC.

For what MrSyclone or WindedV6 have into their builds you could have done the LS route twice already. And that's not ripping on these guys. There is a HUGE premium to building with some relatively obscure 20 year old performance platform.

As far as "documented reliability" 550whp is very well known as 30K+ mile verified turbo setups. There are some people pushing 800-900whp on stock shortblocks. Obviously at that point you're on borrowed time, but suffice to say it's reliability is not disputed.

Some of the big shots will have to come forward with their build costs, but all the stuff for the V6 is billet custom one off type stuff usually. A 6L truck block supports 1000whp, it's just about internals. The heads and intake support 1000whp. There are 10-30 vendors for every part type and hundreds of retailers for most of those parts.

Not only that, but the "heritage" of the vehicle really IMO at least doesn't get disturbed by putting in an LS. It's a clearly superior motor, and so long as you keep it turbo & AWD I don't think you lose most of what this vehicle was all about.

As far as "destroying collector value" you need to really be honest with yourself and realize that only a very very very small minority of cars ever appreciate, and even cars like the GNX when adjusted for inflation are only very very marginal returns.

Long story short, own the vehicle for the reason you want to own it and if you can get more power and minimize your costs, why wouldn't you? Face it, the bowtie build is NOT cheap. You're talking multiples of a similar LS build. And for me personally I feel an LS makes the vehicle much cooler, easier and cheaper to own. It wins on all fronts for me.
 

jklein68

Donating Member
Re: 4.3 vs LS Reliability

Definitely not an expert but we work with a lot of high mileage 300+ mile LS truck motors that are still in good shape internally.

I have to believe that it's just a newer/better design that covers a lot areas.

1. Better cooling, eliminating hot spots.
2. Better casting technology and metal, ?
3. 6 Bolt sunken main caps, much stronger bottom ends.
4. Improved Electronics - less detonation, knock, lean conditions, etc.

Like I said before, not an expert but my two cents.

Jason
 

Logan

Member
Re: 4.3 vs LS Reliability

I am still holding out for one of the new 4.3 All Aluminum Ecotecs!!!!
 

Norm

Donating Member
Re: 4.3 vs LS Reliability

Reliability, no contest ls all day long. Horsepower gains? Ls again. Change a cam and get 75 hp out of it, throw in a nice tune, there's another 35-50 ponies. Set of heads, add another 125. As much as unique as the 4.3 turbo is, I'm happy with the ls swap and probably wouldn't go back.
 

Captain Morgan

Moderated User
Re: 4.3 vs LS Reliability

my biggest reason for going LS is the electronics. Over the past 4 years, I have really grown to dislike OBD-I after dealing with 98% OBD-II cars that come in the shop. So much easier to find the problem, fix the problem and get it back on the road.

Tuning and computer software is another huge part of that as well.
 

Try Me

New member
Re: 4.3 vs LS Reliability

I know my truck has been about a second quicker than my v6, and had far less problems with what i would consider similar builds. Stock block .030 over, forged rods and pistons on stock crank in the bottom. My v6 had a big cam and pretty heavily worked vortec heads and a stock intake. Motor now has a set of stock truck heads, a mild cam, and the aftermarket intake. Both with the same 76mm turbo and 4l80e.

But, building a hi power ls is one thing, getting it into one of these trucks and working is another. :tup: I finished my swap in March of 2009, so its been running for over 4 years now. In that time I've pulled the motor once and did a freshening up (rings and bearings). It was still running strong when i pulled it after three years. I've had to replace the alt and starter recently (they were stock gms from the escalade the motor came from). I drive it a lot and not always easy, so i am pretty impressed with how well it has held up.
 

nallj92

Active member
Re: 4.3 vs LS Reliability

I have been beating the crap out of a stock bottom 6.0 for the past year in my chevelle, and at this point if when the 4.3 or 700R goes next I am all in for an LS swap. You cant beat the reliability, driveability and ease of tuning. Nobody wants to touch OBD1 junk, Distributors, ign modules etc. LSFTW. Plus I have 3 motors sitting in the corner right now. :)
 
Re: 4.3 vs LS Reliability

my biggest reason for going LS is the electronics. Over the past 4 years, I have really grown to dislike OBD-I after dealing with 98% OBD-II cars that come in the shop. So much easier to find the problem, fix the problem and get it back on the road.

Tuning and computer software is another huge part of that as well.

When I was still at the GM dealership, it was brutal having to go back and use a Tech1 on an OBD1 car when they came in. Especially compared to their latest software; GDS and whatever else. Using the MDI module and a laptop with GDS on it made things so much easier. You can have the laptop at your fingertips, instead of having to go back and forth from car to laptop and vice versa. I think the newest "tablet" types have that now, also. Our Snap-On Verus at school was internet-capable with a browser built in. I always considered it the "first ipad" because we had that back before they came out and it's the same basic layout: A touchscreen tablet/scan tool.
 

bezerk

New member
Re: 4.3 vs LS Reliability

never had a problem with good build 4.3 engine, making around 500-600hp (10's) with traction :D
seems to hold up fine, and can DD
 

Smkur50

SYTY Fleet owner
Re: 4.3 vs LS Reliability

after having a super efficient LS1 that I would drive across the state, run a high 10 naturally aspirated, get 24mpg then doing 6500rpm clutch drops for a couple years and..well Im pretty sold on em.
 
Re: 4.3 vs LS Reliability

I know of 5 Ls (5.3, 5.7, 6.0)platform vehicles, all factory, in the city I live in, which have well over 300'000 miles on the original motors. One of which has over 500'000 miles on it. If that doesn't give you any insight to the reliability of these motors, nothing will.
 

Windedv6

Ty n 10s
Re: 4.3 vs LS Reliability

This is like comparing apples to titties.

As Jimmy said...LS motors are great and in most case cheap HP can be had. I bought my first Ty back in 1993 when they were a truck to be respected on the street and fairly fast on the track. For the first 10- 15 years, especially on this board, we would not even consider running anything but a V6 in these trucks and in fact anyone who even considered something else was somewhat of a traitor and not considered a true part of syty land. SBCs where always available to drop into our trucks from the very beginning, but we where a proud bunch of guys and had that V6 ("we can do it") spirit. These trucks were special and we were an elite group that wanted to be a part of this special truck. We didn't belong to the GN crowd, the 454 SS truck crowd, the muscle car crowd, the newer Vette crowd, etc. It was the SYTY group and we hung together with our cool trucks and V6 turbo power.

Eventually over the years a few V8s started coming in, but mostly because of the quest for more power. and although the first ones took some engineering and a lot of man hrs. It was more of a personal challenge for some than a cost difference to build up a decent V6 build.

The LS swaps started out of the need/what for more street competitive hp than the our trucks were originally designed for. When a few of us V6's were in the 11,s and bumping into the tens, most of the others were satisfied having 12 sec rides which were still terrors on the street compared to our non-syty friend's non turbo'ed cars.

Today, everyone has finally discovered "the turbo", that dirty little secret that we had along with GNs for years. They are sticking it in everything. Mustangs, F-bodies, Jeeps...everything. It is cheap HP and with all the vendors and china's manufacturing we now have instant 10-9 sec street cars cheap. The sad thing is that we were the big, "little V6 turbo". Now we can't keep up with the bigger brother V8 turbo...unless we over spend and max design a V6 that has to have over 4 hp per cube, which is totally in the stratosphere range for a V6, let alone putting that kind of HP per cube in most any motor.

The same reason we bought these trucks years ago was the big coolness of them and a little self pride mixed with a touch of ego. Today we are reversing the order somewhat.. Our bigger ego wants to keep up with the rest of the world going around us. Our pride of what these trucks originally meant to us was pushed aside in the LS swaps. The interesting thing is most non-syty people think the V6 turbo was the coolest thing about them. Having a V6 perform the way ours did back in the day was a real feat and that was just cool.

I take both of my trucks to rather large car shows in the area/region. I usually trophy with both of them. But the AWD will normally out rank the other when judged by serious judges, especially when they ask "is it still a 4.3 with AWD?" I am asked all the time if it's still a V6 and AWD...as if they know that these rare trucks are getting change-overs and cut up. When I tell them it is, they stop and spend a lot of time asking questions and going over it. Our trucks are getting noticed as the younger crowd "from back in their day" is getting older and more interested in their "old school" dream car. Hopefully there will still be some V6 AWD trucks around when everyone gets tired of seeing every type of car with an LS turbo stuck it.

The OGs are still around, the Big Guns still talk and occasionally we still meet up..,just not on the board so much. We, quite frankly, get tired of the cheap hp talk. We are into Syclone and Typhoons and it seems that the treads have become more about motor swaps than the coolness of the trucks, the pride of what they are and the thing inside that makes us smile and swell up a little (ego) when someone looks at us and says..."is that a real Syclone Typhoon? WOW,I have heard about them but never seen a real one...does it still have the V6 Grand National motor?" :tup:

John
 
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