What are 823 LS heads? There is a wide range of gearheads in the current market, which might easily confuse many sector newcomers about picking the right one for their vehicle.
That is also the motivation for me to craft the article today. If you are one of them, don’t miss this content to find the answer you need.
In the post, I will walk through an overview of 823 heads, compare them with other common cylinder heads on the market, and conclude whether it is worth my investment.
What are you hesitating about? Dig into the content with me now to encounter the thoughtful answer.
Overview About 823 LS Heads
Once you need to supply decent power to your sports car with an LS engine and push its performance to a new height, the 823 LS heads – also known as the L92 heads – are an ideal option.
This model was first introduced in 2008, and it is set up in the Corvette C6, which belongs to the LS3 of the General Motors family.
This cylinder head offers outstanding power for compact sports racing cars with around or beyond 430 horsepower.
Basically, the latest head casting might be seen as a miniature version of the LS7 model, which was first equipped in 2007 on the Escalade from Australia.
The producer claimed a strong commitment to this version. They were firmly built yet lightweight and compact.
So it wasn’t hard to understand why the generation could keep speed enthusiasts pleasant for a long time.
You will encounter these heads in most eras, from GM brands, such as Hummers, Pontiacs, and Cadillac, to GMC and even Isuzu models.
Are 823 LS Heads Good?
Yes. After 6 months of testing, I consider this head absolutely worth it for its flexibility, performance, and price. I noticed an increase in horsepower without paying much for this part.
On many gearhead automobile forums, it isn’t easy to find a bad review shared about the all-key and iconic part.
There are some cylinder heads popular for the block LS3, yet not at all likely. First, let’s discuss some 823 heads specs.
The 823 head owns a chamber of 70cc with rectangular style ports, which are the most common posts on the current market, or around 65cc with the cathedral style.
To generate the right power, these cylinder heads are well-known for a quite big intake port estimated at 2.165-inch diameter with 257cc and its exhaust port volume of 1.59 -inch diameter, 87cc.
The cylinder head is fitted with a wide range of edge-cutting features, such as advanced turbocharging, innovative porting (like Computer Numerically Controlled or CNC methods), and other useful mods.
With these improvements, cars with this kind of head are not hard to reach 1,000 horsepower or even beyond.
If you still are in two minds about choosing this head, don’t lose your patience on my post in the next section to find out how reliable it is.
I will dig into this topic through a thoughtful comparison between 823 cylinder heads and other rivals.
823 LS Heads Compared With Others
Apart from 823 heads, you can easily come across 821, 799, 243, and 706 cylinder heads. I have tested these to summarize this rundown for you, so check it out!
821 vs 823 Heads
Basically, this couple has the same structure yet different valve and spring technology. The components on a cylinder head 821 are a bit lighter than those on the other, reaching around 19g.
This is quite important if you are trying to reduce extra weight to reach optimal performance, yet it will not produce a clear improvement in power to the normal road driver.
I think those who usually carry heavy loads or tow trailers will treasure this lightweight design. But for me, this is a draw since I didn’t notice much of a difference.
823 vs 799 Heads
As mentioned earlier, LS3 heads 823 have two key types of port style. In comparison, 799 cylinder heads are equipped with a common shape of cathedral style at only one point at each end.
This seems slightly ropey in terms of performance. Thus, if you are pursuing speed, sticking with the 823-cylinder head is a wise move.
Regarding finish, many reviews say 799s deliver a smoother one than its rival when pitching them against each other.
823 vs 243 Heads
As mentioned about the LS 823 heads specs, its bigger intake port owns a 70cc, whereas the common 243 L6 cylinder heads have basically a smaller volume at 64cc.
This means that 823s offer and promote better overall performance in the vehicle’s combustion chamber.
Furthermore, there are contrasting opinions on gearheads about whether the “swirl” detail equipped on the 243 heads to boost air and fuel mix in the combustion chamber indeed works.
Many users removed or milled down this part, yet soon after that, they found it might trigger some unwanted turbulence.
823 vs 706 Heads
The 706 cylinder heads are built to generate excellent performance, which can reach up to 4,000 rpm.
Nevertheless, I have experienced many different experiments in the market and can confirm that the 823 LS3 heads are still perfect for racers who are willing to run their budget for their passion for speed.
FAQs About 823 LS Heads
In this part, I will pass through three common tricky queries in the field.
What Size Valves Are In LS 823 Heads?
There are two sizes fitting with two shapes of valves in LS 823 heads. The first one is 257cc at 2.165-inch diameter for the intake valve.
The other type has a 1.59-inch diameter, measuring 87cc for the exhaust valve.
What Are The Most Powerful LS Heads?
According to many experienced drivers, LS6 is the strongest model in the family. Its engine is 5.7L which is an advanced model of the primary motors LS1 and LS2.
You can check my LS2 vs LS6 intake comparison for more details.
The body of the LS6 cylinder heads is made from aluminum. It is equipped with a cathedral-style intake port with a capacity of 210cc, whereas its exhaust valve is D-formed with an overall volume of 75cc.
Are LS3 Heads Better Than LS2?
Yes. According to many users, LS3 cylinder heads create more power and potential than their siblings. I also tested them to conclude that LS3 heads are better than LS2 in most aspects.
However, the price of owning an LS3 head is not affordable for most pockets. Therefore, many decide to pick the LS2 after a thorough consideration to stay within their safe budget.
In A Nutshell
I have just walked through all the ins and outs of 823 LS heads.
Passing through the key ideas above, I can come to the conclusion that if you are willing to run your budget for your speed passion, 823 cylinder heads are completely suitable for your demand.
Thank you for your company. I’m really happy when I can unveil some tricky queries for you. I will accompany you when taking care of your 4-wheel friend better in the coming days.
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