Loading... Please wait...

LSX Blog

LSX New Release Cylinder Heads | Design & Testing

Posted

In the never ending chase for horsepower & torque gains we are constantly researching the huge range of aftermarket products available for the LS/LT market.
This enables us to see what works best for each engine combination in terms of both performance gains but also best value for money for our customers. 

Majority of street/strip engine builds these days work best with the "less is more" approach. Simple combinations maximizing the current engine package. The easiest way to do this is to figure out the following:

  • What is your end goal? (Street or Track Use, N/A or Boosted etc)
  • What is the most efficient engine combination for your purpose (cubic inch, max rpm etc)
  • How much Horsepower are you trying to achieve? (The magic question.. lol)
  • What is your budget? 

Ideally, your rotating assembly rating should not only exceed your target horsepower but be correct for your application in terms of max rpm, boost or power adders etc. (despite what your mates cousins uncle says!)

So what is left..? Once the bottom end is out of the way, we need valvetrain & cylinder heads!

Cylinder heads are an important component of every build. Wrong selection here can be a huge limiting factor for your end result.
The question is, how do you know what to choose?
For the bigger cubic inch builds or serious forced induction builds there are many aftermarket options such as Brodix, Dart, Higgins, AFR which we have all used time after time achieving awesome results.
However, for the street/strip build or the entry level racer application the combination/budget may not be suited for such a big dollar cylinder head. 

Reality is, a large cathedral port LS2 or rectangle port L98/LS3 head is capable of huge gains when setup correctly.
Unfortunately, these are becoming harder to get and simply overpriced when purchasing second hand with no warranty or guarantee that they are actually good quality or undamaged!

We ourselves have noticed a huge demand for such heads as we have been in the same boat of not being able to source good used ones for porting etc. Cylinder heads would show up with stripped threads, damaged chambers, broken guides & worse.... Rusted water ports from using cheap gaskets & terrible maintenance!
This means they go straight in the bin along with your wasted money. (See above)

This is what has prompted our latest release of LSX Cylinder Heads.
Cast from the original moulds using the same aluminum our LSX cylinder heads are available in a range of Cathedral Port, Rectangle Port & 6 Bolt LSX.

These can be purchased in your choice of:

"As Cast" - Assembled & Ready to bolt on with large port intake runners & exhaust ports out of the box.
(see below)

OR 

"CNC Ported" - Assembled & Ready to bolt on with CNC ported intake runners, exhaust ports & combustion chambers etc 
Both options are assembled with valves & our Brian Tooley Racing BTR .660" platinum dual spring kit ready to install. 


Features Of The LSX Cylinder Head Range:

  • Thicker Than OEM Decks  
  • Increased Port Volumes
  • Retain OEM Rockers  
  • Retain OEM Valve Covers
  • N/A & Forced Induction Combustion Chambers

The Range:

Cathedral Port:

The LS2 Port is an upgraded version of the 243 cylinder head which features a 64cc combustion chamber paired with a 210cc Intake Runner.
The thicker deck make these perfect for not only N/A but boosted applications to prevent lifting cylinder heads under extreme boost pressure. 
These are a straight bolt on for LS1 & larger engines. Due to it's large cathedral port design these will show significant horsepower and torque gains over standard 241/243 castings.
Early testing on our "As Cast" version has shown a 25+rwkw gain over ported LS1 Heads.

These are also available CNC Ported which features CNC Ported Intake Runners & Exhaust Ports, CNC Ported Combustion Chamber and multiple options for deck height to suit desired compression.
Although we already know it out performs the OEM version, we will be doing some back to back comparisons in the coming weeks to show the direct comparison between our LSX "As Cast" & "CNC Ported" options. 

Naturally Aspirated Rectangle Port:

The LS3 Port range is a unique design as it pairs the deck thickness of an LSA cylinder Head with our 65cc Combustion Chamber. The Intake Runners are a large 280cc which means these are a straight bolt on upgrade over the OEM LS3 Heads. (GM LS3 Heads feature 70cc chamber/ 257cc runner). The combination of smaller chambers & larger runners have proven to offer instant torque gains down low whilst carrying the horsepower gains up top. 
Our "As Cast" have shown gains over standard comparable with CNC Ported OEM heads on street spec camshaft profiles. 
The CNC Version upgrades to a 285cc Runner & 64cc Combustion Chamber however, we have the availability of several chamber volumes depending on your requirement. 
These have gone over 650hp on a 416ci LS3 with a hydraulic camshaft on pump 98.

Forced Induction Rectangle Port:

The FI LSA port features a larger 71cc combustion chamber to keep compression ratios down while receiving the 285cc Intake Runner.
The FI Port is designed to work perfectly with either supercharged or turbo engine combinations that don't require a 6 bolt configuration. The thicker LSA style decks make these the perfect upgrade for boosted engine applications.
We currently use these on our LSA Supercharged HSV which makes 564kw/756hp @ the hubs on 98 fuel 14psi.

LSX 6 Bolt Rectangle Port: 

Our LSX 6 Bolt Heads are currently available in a Forced Induction & Naturally Aspirated configuration.

Features of the LSX 6 Bolt Heads:

  • 70cc & 64cc Combustion Chamber Options
  • 285cc Intake Port Volume
  • 15 Degree Valve Angle
  • Accepts LS3 Rocker Arms
  • 6 Bolts Per Cylinder
  • Accepts OEM Rocker Covers

These are designed with thick decks to suit N/A, Forced Induction & Nitrous Applications!

*12 Degree valve angle LS7 port is in the final stages of testing.

As you can see above we are preparing to do some extreme testing on both our "As Cast" & "CNC Ported" versions on our latest Dart 427ci build which features a Harrop TVS2650 Supercharger. 
We will be showing some comparisons prior to moving onto further testing of our soon to be released LS7 Port 6 Bolt Heads. 

As a standard our LSX Cylinder Heads feature a set of PAC/BTR .660" Platinum Dual Valve Springs & Stainless Steel Valves. These can be shipped worldwide & supplied with required bolts, gaskets etc to do the swap.

Want to check out the range? Click Here and check them out online.

Exciting New Product Release | LSA TVS2650 By Kong Performance

When it comes to forced induction, it's no secret that the LSA Supercharger has simply outperformed the competition when comparing it's size & capability. Simple modifications such as a boost pulley & cold air intake swap really get the LSA supercharger creating serious horsepower. Further upgrades such as CNC porting have also shown significantly large [...]

Read More »


LSX Workshop Tools | Engine Builder Must Have's!

As we all know it is coming to the time of the year when we all start looking forward to the holidays.But what does this time off really mean?..... Quality time in the garage upgrading the beast!Whether you have purchased one of our LSX Camshaft Packages or Rotating Assemblies or just doing some maintenance we [...]

Read More »


Assembled Engine Package | Ready To Ship

As some of you may know, the engine team at LSX Performance Parts has been working overtime this year due to the high demand of engine packages we have built & shipped out to our customers. In this time we have outgrown our previous location, experienced frustrating parts delays however the final product has always remained [...]

Read More »


LS Forged Rods & Pistons On Sale NOW

Are you playing Russian roulette with your standard internals??Are you making WAY more power than the standard internals are designed to handle??Are you running big boost on a stock bottom end??Has your engine seen a few kilometres??Planning on fitting a blower OR aggressive heads & cam package to your stock bottom end??These are just some [...]

Read More »


Secure Your Magnuson Heartbeat 2300 Kit For Christmas!!

LSX Performance Parts will have the Magnuson Heartbeat 2300 Supercharger Kits back in stock & available to purchase.The shipment is expected to arrive mid November & will be the LAST shipment of them for the year!Don't miss out on your new Magnuson Heartbeat 2300 Kit to suit your car.If you want your new kit for [...]

Read More »


Exciting New Product Release | Harrop TVS2650 to suit VE LS2

Although the Harrop TVS 2650 is basically a household name as the newest and most advanced supercharger in the Harrop range, the question is often asked when they will be released to suit the LS2 found in the E-Series HSV.This product development comes off the back of updating the ever popular FDFI2300 supercharger to replace [...]

Read More »


MPI Automotive Has Bought Di Filippo Performance Exhausts (DPE)

As of Monday 4th of March 2019, MPI Automotive has taken over the Di Filippo Performance Exhaust product range & manufacturing facility in Melton VIC.MPI Automotive manufacture MANTA Performance Exhausts, who are Australia's largest range of Street & 4x4 exhaust systems.MPI Automotive are a 3rd generation family owned Australian company founded in 1974.This is great [...]

Read More »


Driveline Warranty for Performance Packages & Modified Vehicles

"Will these performance upgrades void my manufacturer warranty???" This is a very common question we get asked at LSX Performance Parts.Lets face it - Voiding your manufacturers warranty is the biggest reason to hold off on those upgrades you have always planned on doing to your pride & joy.Fact is, ANY performance upgrade you do will [...]

Read More »


Harrop TVS2650 Supercharger Upgrade Packages

There is no doubt having a boosted LS engine is by far one of the most popular ways to make power.Before the mighty factory LSA powered cars hit the Aussie market in 2013, Harrop produced both the FDFI1900 & FDFI2300 Supercharger Kits to suit VE - VF & E-Series HSV's.This gave us the ability to [...]

Read More »


Sign up for our newsletter

View Cart Go To Checkout