L83 SWAP TO L86 Anyone done it?

[flyingfool]

2 hours ago, truckguy82 said:

6.6 doesnt have anymore torque.

 

it’s the 6.2 with lower compression and an iron block for longevity, they only increased the displacement to compensate for the power loss.

 

I’d rather have the l86 personally

it has more Mechanical Leverage, because the crank is stroked 3mm or so.. on a 6.6  vs the 6.2

 

i  just like the idea of buying a set of high flow heads , e85 sensor , 6.2 intake, cam and 6.2 TB, and a tune.  call it good enough for the 5.3

Edited July 10, 2020 by flyingfool

[truckguy82]

1 hour ago, M1ck3y said:

 

Swap in different pistons and heads, plus I imagine they left a lot of power on th,e table. The 6.0 was 50 rwhp short of what it can do.

 

To the op, you have a great motor on your hands, why not make it a stroker? Cheaper and you'll make more power then a stock 6.2. 

The l86 was used in the camaro and corvette. i’m pretty sure if you’re goal is to build the motor, you’d be far better off with the l86.

[JimCost2014]

 

This was my 14, 6.2, 6 speed, and a 3.42 rear end, it was a very quick truck, stayed in the happy torque range a lot better than the 2 8 speeds that I have/had so far.

 

Remember a Charger R/T trying to pass me at 60, beat him to 90 plus, then let him pass, because I was in a truck, and common sense kicked in

[M1ck3y]

9 hours ago, truckguy82 said:

The l86 was used in the camaro and corvette. i’m pretty sure if you’re goal is to build the motor, you’d be far better off with the l86.

 

You don't know what your talking about, stop spreading misinformation.

 

The LT8 is a stroked lt1/l86. They all share the same architecture. 

 

The main difference is the heads and pistons to accommodate a lower compression ratio to run balls out all the time on 87 octane (401/464). The internals are more durable, no afm hardware, cast block etc.

 

Like I said. Bump the compression up by swapping the heads/pistons, and run 93 octane. It's easily making 500 plus without a cam swap.

Edited July 10, 2020 by M1ck3y

[truckguy82]

23 minutes ago, M1ck3y said:

You don't know what your talking about, stop spreading misinformation.

 

The LT8 is a stroked lt1/l86. They all share the same architecture. 

 

The main difference is the heads and pistons to accommodate a lower compression ratio to run balls out all the time on 87 octane (401/464). The internals are more durable, no afm hardware, cast block etc.

 

Like I said. Bump the compression up by swapping the heads/pistons, and run 93 octane. It's easily making 500 plus without a cam swap.

Same architecture and different heads and internals, so what’s going to be more mod friendly, a motor that’s been out since 2014 and likely had over a million produced, or a motor released in 2020 for only hd trucks.

i realize it’s not THAT much different, but it’s still different. L86’s are a dime a dozen at this point. And you want to proceed with an all new motor as a platform, a new motor which doesn’t make any more power stock, and is likely much heavier, just for like a 6% increase in discplacement?

 

new flash, bolt on vettes and camaro’s are making 500whp! You’re talking about swapping the heads and pistons rofl. If you’re going to swap the heads and pistons, why start with the 6.6L anyway? Just for the block? Surely it’d be cheaper for a 427 shortblock.

 

You don’t actually know what you’re talking about. Nobody casually swaps heads and pistons in LT motors. These aren’t LS motors. Maybe in 10 years the 6.6L will be the way to go, but it sure as hell isn’t now.

[Snowcamo]

Less bashing more enlightenment[emoji106] threads like this shouldn't die due to bs chit talk. We need ish like this in this forumn.

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[newdude]

After having my 2019 LD (the old body same as 2018) 5.3 custom tuned on 93 and set up for flex fuel/E85, not sure I need a 6.2.  My tuner was daily driver conservative and still found about 20hp tuning on 93 over stock 87 octane, and gained another 24hp on E85.  So over my baseline, on E85 I'm up 44hp.  Feels every bit as quick as a 6.2 6 speed.  I'm going to have to get some test data LOL.  

Edited July 10, 2020 by newdude

[Snowcamo]

I personally absolutely love the tone of the 427. Man it just sounds like a deep toned beastly growl. [emoji848][emoji16][emoji817][emoji106]

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[mookdoc6]

When and "if" my L83 blows.....twist my wrist and put a L86 in there!

[truckguy82]

32 minutes ago, newdude said:

After having my 2019 LD (the old body same as 2018) 5.3 custom tuned on 93 and set up for flex fuel/E85, not sure I need a 6.2.  My tuner was daily driver conservative and still found about 20hp tuning on 93 over stock 87 octane, and gained another 24hp on E85.  So over my baseline, on E85 I'm up 44hp.  Feels every bit as quick as a 6.2 6 speed.  I'm going to have to get some test data LOL.  

Well here’s your data to compare. Completely stock with a tune.

 

[flyingfool]

everything is easy to say, swap this do that, flash this.... once life gets in the way it turns into a mothball project POS from hell. just buy a new truck with the correct options your looking for  this time.

[truckguy82]

17 minutes ago, flyingfool said:

everything is easy to say, swap this do that, flash this.... once life gets in the way it turns into a mothball project POS from hell. just buy a new truck with the correct options your looking for  this time.

Eh, depends entirely on 

 

-how well off you are financially

-how good you are wrenching

-how much spare time you have

 

Single auto mechanic - swap away

Attorney with 3 kids under 5 - hell no

[M1ck3y]

2 hours ago, truckguy82 said:

Same architecture and different heads and internals, so what’s going to be more mod friendly, a motor that’s been out since 2014 and likely had over a million produced, or a motor released in 2020 for only hd trucks.

i realize it’s not THAT much different, but it’s still different. L86’s are a dime a dozen at this point. And you want to proceed with an all new motor as a platform, a new motor which doesn’t make any more power stock, and is likely much heavier, just for like a 6% increase in discplacement?

 

new flash, bolt on vettes and camaro’s are making 500whp! You’re talking about swapping the heads and pistons rofl. If you’re going to swap the heads and pistons, why start with the 6.6L anyway? Just for the block? Surely it’d be cheaper for a 427 shortblock.

 

You don’t actually know what you’re talking about. Nobody casually swaps heads and pistons in LT motors. These aren’t LS motors. Maybe in 10 years the 6.6L will be the way to go, but it sure as hell isn’t now.

Go Back and read my post, your making yourself look like an idiot.

 

To the original poster, I had said that I think he should his keep his 5.3 and stroke it.

 

To You, For all out modification I would go with the 6.6 over a l86/lt1. Its direct injected, has better block cooling, and its more durable straight from the factory. Yes the difference in displacement is actually a lot, but perhaps to the untrained eye it seems like very little. And I could be wrong, but the 6.6 might actually use the same heads as the lt1/l86 (I cant remember), I believe they just changed the crank and connecting rods to make it a stroker. So for after market parts, basically anything that bolts up to the lt1/l86.

 

I'll break it down. on 87 octane with a low compression ratio the 6.6 makes 464 ftlbs of torque and thats detuned from the factory. can you get the picture now? Not only can you make a lot more power on just the motor by bumping the compression up. The internals can handle boost no problem out of the gate. And on top of that, being a stroker engine it will make substantially more torque.

 

I didnt realize we were talking about who can afford what. That is i mean we weren't until you decided in your post above that we were. 

Edited July 10, 2020 by M1ck3y

[Snowcamo]

Go Back and read my post, your making yourself look like an idiot.
 
To the original poster, I had said that I think he should his keep his 5.3 and stroke it.
 
To You, For all out modification I would go with the 6.6 over a l86/lt1. Its direct injected, has better block cooling, and its more durable straight from the factory. Yes the difference in displacement is actually a lot, but perhaps to the untrained eye it seems like very little. 
 
I'll break it down. on 87 octane with a low compression ratio the 6.6 makes 464 ftlbs of torque and thats detuned from the factory. can you get the picture now? Not only can you make a lot more power on just the motor by bumping the compression up. The internals can handle boost no problem out of the gate. And on top of that, being a stroker engine it will make substantially more torque.
 
I didnt realize we were talking about who can afford what. That is i mean we weren't until you decided in your post above that we were. 

My only concern with the 427 is longevity. I hear the strokers don't last long due to the added stress on the rotating Assembly.

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[truckguy82]

2 hours ago, M1ck3y said:

Go Back and read my post, your making yourself look like an idiot.

 

To the original poster, I had said that I think he should his keep his 5.3 and stroke it.

 

To You, For all out modification I would go with the 6.6 over a l86/lt1. Its direct injected, has better block cooling, and its more durable straight from the factory. Yes the difference in displacement is actually a lot, but perhaps to the untrained eye it seems like very little. And I could be wrong, but the 6.6 might actually use the same heads as the lt1/l86 (I cant remember), I believe they just changed the crank and connecting rods to make it a stroker. So for after market parts, basically anything that bolts up to the lt1/l86.

 

I'll break it down. on 87 octane with a low compression ratio the 6.6 makes 464 ftlbs of torque and thats detuned from the factory. can you get the picture now? Not only can you make a lot more power on just the motor by bumping the compression up. The internals can handle boost no problem out of the gate. And on top of that, being a stroker engine it will make substantially more torque.

 

I didnt realize we were talking about who can afford what. That is i mean we weren't until you decided in your post above that we were. 

i am not talking about who can afford what.
 

modding is all about 3 things

cost/reliability/performance.

 

at no point, with any horsepower goal or any budget goal, does the 6.6 swap make sense.

 

everybody has a budget, and if your budget is smaller, you’ll do better with the l86. If your budget is bigger, you’ll do better with a custom shortblock. At no point does it make sense to use a 6.6.