LT SWAP GUIDE BY ICT Billet LLC

 

INTRODUCTION

Welcome to The LT Swap Guide presented by ICT Billet!

Below we will be touching on some of the key parts in your LT swap, and better understanding how the different components all come together. 

We carry everything from LS swap mounts to adapters and wiring.

If you can not find an answer to your question in this guide please Contact Us

 

 Crank Pulley (Harmonic balancer)

 

One of the most important steps of your swap is to identify the "spacing" needed. This "spacing" is determined by the crank pulley that you have, or will be getting. 

Here at ICT Billet we design our brackets based off these three spacing principles. 

  • (-1) Corvette C7 LT1 crank pulleys are in this category. See guide below for measurements
  • (-2) Camaro SS LT1 crank pulleys are in this category. See guide below for measurements.
  • (-3) All Truck / SUV crank pulleys are in this category. See guide below for measurements. 

What this means to you? 

All of our systems function around this spacing concept to ensure the kit is a direct bolt up to your application for proper functionality.

We categorize our parts by a 6 digit part # with a (-) at the end. Depending on which application the bracket was designed for would determine the last digit.

A noticeable visible difference between the two are the amount of holes there are in the face of the pulley, the Corvette LT1 has many holes, the Camaro LT1 has only 2 holes, and the Truck/SUV pulley has no holes. 

Please Contact Us if you have any questions

 

 

Water Pump

General spacing applies for the water pumps as well. You can NOT use any water pump on any LT based engine. Yes they will bolt up, but spacing is very important, same as pulley size, ect. However there is more adaptation for the water pumps with our water pump spacers.

 Example: You can use a (-2) spacing SS water pump on a (-3) Truck/SUV engine.  

What this means to you? 

 The ability to use different style water pumps will allow the build to be more universal. Most swaps are done to be as cost effective as possible. 

Instead of buying a brand new water pump for your spacing just use ICT Billet Water Pump Spacers to make the one you have work! Make sure to keep in mind where the heater hose will run into the water pump when deciding on what water pump to use, what intake manifold, which ICT Billet Bracket to use, ect.

Keep in mind the L82/L84/L87 water pumps are designed completely different then everything else. The LT1 / LT4 / L83 / L86 all have water pumps with pulleys that are off center. The L82 / L84 / L87 water pump returns the pulley back closer to center of the accesory drive like the LS style water pumps. 

Feel free to Contact Us if you have any questions!

 

See link to shop ICT Billet Water Pump Adapters

 

Alternator

 

The alternators on the LT based engines offer a very high output compared to the LS based alternators. The LT truck alternator is actually the same size as the LS truck alternator and can be used with ICT Billet brackets designed for LS applications. The outputs very from 150 amp ( L82 / L83 / L84 / L86 / L87 ) to the Camaro and CTS-V ( LT1 / LT4 ) whopping 215 amp

What this means to you?

The LT engine alternators offer a bigger selection of amperage needs for your build. If you have a simple set up that does not have alot of electrical components that is perfect. If you have a set up that has a ton of electronics or a wall of subwoofers these alternators should provide you plenty of juice. Check them out and integrate them into your build!

Feel free to Contact Us if you have any questions!

 

Intake Port

There are not much different when it comes to the heads on the gen V engines. The most noticeable difference would be where the bolt holes are for the intake manifold. 

The non-supercharged LT1, L82, L83, L84, L86, and L8B have a "mid bolt" location. Meaning the bolt holes for the intake are about the middle of the intake port on the heads. 

The superchared LT4, and LT5 have raised bolt holes. These holes are located above the intake port on the head and these raised bolt holes are what the blowers will bolt into. 

What this means to you?

This means be careful when purchasing the engine you need for your swap. There are many similarities of the gen V engines in comparison to one another, but its subtle details like this that can throw your entire build off. When fitting a LT4 to a non-LT4 head there are a few steps to take to get you ahead of the game. Here at ICT Billet we have designed an adapter for two ways. The first is to allow you to bolt an LT4 blower to a non-LT4 head. What that means is you can mount the LT4/LT5 blower to your gen V truck engine! The next adapter we made was the opposite. To convert from an LT4 head to a non-supercharged setup. So that means you can put a regular car intake on your LT4 engine. Mainly used in other forced induction applications where an intake mounted blower will not work. 

Feel free to Contact Us if you have any questions!

 

Click here to shop ICT Billet LT4 Adapters

 

Throttle Body

General Motors really outdid themselves with the throttle bodies on the new gen V engines. There is a wide variety and variation to select from. We have 5 different options ranging from a 72mm to a 95mm bore. The have different dimensions as well, please see the guide below for the exact measurements of the throttle body assembly. The location of the throttle position sensor varies as well. Some are on the left, some on the right. Depending on which engine you have will determine the type of throttle body and orientation you need. Please refer to guide below to see what throttle body you need! 

What this means to you?

When purchasing the engine, intake, and harness you want for your swap you will need to keep in mind the throttle body that will go with that intake. The size of the opening and also the diameter of the holes. Where the throttle position sensor would plug in is also a key factor. Would hate to get everything installed and find out the harness will not reach, then you will need a wire harness extension. Here at ICT Billet we make adapters, extensions, throttle body rotation adapters, ect. We can help ease the pain of finding the throttle body for your needs!

Feel free to Contact Us if you have any questions!

Click here to shop ICT Billet Gen V Throttle Body Adapters

 

 

Supercharger

The exciting part of any swap is deciding how you are going to power this thing. Either keep it naturally aspirated, or nitrous, or forced induction. The ideas will constantly be tossed around your mind until you settle on one. If you decide to go with forced induction it is easy as ever with the LT4 blowers. The LT4 blower is a 1.7L intake mounted supercharger that comes factory on the Z06 Corvette, ZL1 Camaro, and Cadillac CTS-V. Here at ICT Billet we have made a way to mount these LT4 blowers onto your LT truck engine. The difference is the mounting locations on your heads from the non-supercharged truck block to the LT4 blower. The LT4 off of the Camaro and Cadillac are peferable, they have the proper spacing needed to introduce your blower into the serpentine drive system. The snout on the Corvette blower is recessed. We also have accessory drives that will include the idlers to make sure everything stays tight. Please refer to the guide below for more information and specifications on the LT4 and LT5 blowers! 

 Feel free to Contact Us if you have any questions!

Click here to shop ICT Billet LT4 Adapters

 

 

Oil Pan Guide

The oil pan will be one of the most difficult pieces to spec for your build. There is no real good way to have a universal one size fits all oil pan. With the number of vehicles receiving these LT swaps growing, the dimensions of the engine compartment are constantly changing. Below in this oil pan guide we lay out the dimensions of the oil pans commonly used and hopefully this information will prove benificial to you during your swap.  Take these measurements and make a game plan on which of these oil pans will work for you! Here at ICT Billet we want your LT swap to be painless as possible. Take a look and feel free to Contact Us if you have any questions!

 

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