Why The Gen-V LT Outshines The LS

[swathdiver]

The things with OHC motors is the cost and complexity of repairs and performance mods. The aftermarket has enough trouble dealing with VVT, I can't imagine them mastering higher power Coyote camshafts better than the millions Ford already spent save for the gains you get ignoring emissions requirements that they have to follow.

Then there's the cost. 1 cam for an LS or LT versus 4 for an OHC V8. Plus the chain and all the ancillary equipment. No thanks.

We can modify our LS engines to run reliably and for a long time at about 650 horsepower at the flexplate and that'll take a 6,000 pound truck into the mid 12s down the 1/4 mile.

The L84 can be deleted and cammed and supercharged and make maybe 50 horsepower more. Their fuel system is more expensive. I don't know how the performance world is coping with those 8-speeds that so many of them have. We know they are putting 10-speeds in GMT900s.

And that brings up another point, you can have two trucks with the same motor and rear axle ratio. One with a 6-speed and one modded with a 10-speed. That 10-speed truck is going to smoke the 6-speed all day long. That's a better bang for your buck than an LT motor at present.

 

[donjetman]

The things with OHC motors is the cost and complexity of repairs and performance mods. The aftermarket has enough trouble dealing with VVT, I can't imagine them mastering higher power Coyote camshafts better than the millions Ford already spent save for the gains you get ignoring emissions requirements that they have to follow.

Then there's the cost. 1 cam for an LS or LT versus 4 for an OHC V8. Plus the chain and all the ancillary equipment. No thanks.

Brett LaSala with his coyote powered Mustang "Snot Rocket", fastest competitor at Sick Week at the moment, fells differently at 5.05 in this video:

 

[swathdiver]

Brett LaSala with his coyote powered Mustang "Snot Rocket", fastest competitor at Sick Week at the moment, fells differently at 5.05 in this video:

Pretty cool but don't LSs run the same? It takes a lot of dollars to make 3,000 horsepower and run that fast.

I just googled a Borowski engine making 3K horses for $73K.

 

[j91z28d1]

Pretty cool but don't LSs run the same? It takes a lot of dollars to make 3,000 horsepower and run that fast.

I just googled a Borowski engine making 3K horses for $73K.

can't go that fast or make that power with a ls, even with a aftermarket block. not enough head clamping. they pop head gaskets and fire etch blocks long before that. LT has the same amount of studs. might turn out to he a little better if decks are thicker but not enough to matter matter currently. one of if not the fastest stick shift car runs a Gen 1 small block for the extra head studs it has. by then normal people go big old school big block chevy or maybe even hemi?

what that green mustang is doing has kinda wild.

 

[swathdiver]

can't go that fast or make that power with a ls, even with a aftermarket block. not enough head clamping. they pop head gaskets and fire etch blocks long before that. LT has the same amount of studs. might turn out to he a little better if decks are thicker but not enough to matter matter currently. one of if not the fastest stick shift car runs a Gen 1 small block for the extra head studs it has. by then normal people go big old school big block chevy or maybe even hemi?

what that green mustang is doing has kinda wild.

Well, that's exactly what Borowski is selling, a 3,000 horsepower LSX.

 

[j91z28d1]

Well, that's exactly what Borowski is selling, a 3,000 horsepower LSX.

I don't know the details. but if so, he's doing something that no one else seems to be about to do.

 

[swathdiver]

I don't know the details. but if so, he's doing something that no one else seems to be about to do.

Borowski Built Twin Turbo 427 LS - 3,000 HP Dart LS Next2 | Borowski Race Engines

Bullseye NLX 83MM Turbos, Dart LS Next2 Block, Callies Billet Crank, Callies Ultra I-Beam Enforcer Rods, Custom Diamond pistons, All Pro Heads, Crower Rockers

borowskirace.com

Well, why don't you buy one and let us know?

 

[Foggy]

I learned something from my machinist last week about the
new 6.6 L Gas DI engines that the newer (2021+?) trucks..
The 's etc.. Have...
Because I thought about building one.. They have a great block
and a sweet 3.90 stroke...BUT
A new camshaft is over $1200+ YIKES
I'm old school and think that pre-covid LS3 cams for $400 was
way to F'n high (they are over $500+ now )
And even an old school SBC roller cam is 450-550 OUUCH
as I'm rebuilding one of my 421 sbc engines and "thinking"
about a cam change

 

[fozzi58]

can't go that fast or make that power with a ls, even with a aftermarket block. not enough head clamping. they pop head gaskets and fire etch blocks long before that. LT has the same amount of studs. might turn out to he a little better if decks are thicker but not enough to matter matter currently. one of if not the fastest stick shift car runs a Gen 1 small block for the extra head studs it has. by then normal people go big old school big block chevy or maybe even hemi?

what that green mustang is doing has kinda wild.

Didn't the LTs get a 1 or 2mm thicker head bolt? I remember reading that somewhere. Ford did the same thing with the Gen 3 Coyote.

I'm looking at fuel upgrades now cause my tuner said I am out of fuel. I think the LT is a better platform but you are correct, it does take more money. I have a 5.3 so I don't need to go berserk, but I would need an LT1 fuel rail and high side pump ($1200), OEM LT1 injectors ($700), the 6.2 Fuel rail ($200), and a dual in tank pump like Walbro or Racetronix ($800). That setup is good to about 900HP (depending upon the cam's fuel lobe %) which is well above my end goals for my truck.

I didn't mention the cost of the cam above cause I thought it was obvious that if you are going to force that much fuel down the LTs throat, you would assume a heads an cam package was going on the motor anyways.

The LS platform would eliminate the high side fuel pump and under-intake rail that supplies the 2200psi fuel to the DI injectors.

 

[RET423]

Simplicity equals reliability, one roller cam with 2 gears, a chain measured in inches & pushrods as a means to control valve events is infinitely cheaper & more reliable than multiple cams, multiple gears & a timing chains measured in feet with multiple tensioners to control the same valve events

VVT, DOD & DI are all technologies that provide additional tuning benefits but that add complexity, expense & failure points to the engine without a benefit significant enough to compensate for it

As these technologies were added to the LS the engine became less reliable but removing that tech was easy & restored the former benefits to the engine; if the LT is to ever become a staple like the LS it will be because of the ability to affordably ditch the unreliable aspects & simplify the processes back to a reliable engine that can handle significant performance increases without falling apart

What works is what works, all the claims about advantages with the more involved technology never matter if the added failure points nullify the benefits

You can hit & maintain a target AFR consistently with computer controlled port fuel injection, the injectors do not need to be introduced to the combustion chamber & its DESTRUCTIVE environment to achieve a reliable AFR; it just costs more to develop injectors that will work in a combustion environment & it reduces their lifespan to move them to the combustion chamber. VVT can expand the optimal rpm range of the cam profile beyond a static ground cam but not without adding cost & reducing reliability to a point that nullifies the benefit, DOD is just a gimmick to please the EPA that provides no real advantage in exchange for its failure prone design

The LT has a long hill to climb if it's ever going to become the lunch box standard that the SBC enjoyed from it's gen 1 beginnings all the way through the LS run, it will have to work in the real world driven by real people over real time periods; not just in the theoretical laboratory environments