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If you are considering building an LS engine or LT engine for your project car, engine swap, racecar, or otherwise your first step is going to be deciding what block you want. LS/LT engines come in a range of sizes from the factory from 4.8L to 7.0L. What is you could take a block as small as a 5.3L and turn it into a 7.0L - one that has stronger and better sleeves than any factory block? That is where resleeving your LS or LT block comes into play.
If you’ve ever built an engine, or had an engine built, you’ve likely suffered through trying to find pistons. Pistons are one of the most technically complex parts of an engine recipe, and trying to determine the correct pistons for your build is a mix of application, experience, math, availability, and even your own engine builder’s preference. Well, we got sick of browsing ecommerce stores with poor filtering, catalog referencing, and compression ratio calculators, and built our own tool to help you find the pistons you need.
Measuring pushrod length for your LS or LT engine is a crucial part of building an engine, swapping a camshaft, changing lifters to a different type, changing cylinder heads, and more. We’ve made a video to help anyone with an LS or LT engine be able to properly measure their pushrods.
PCV, or positive crankcase ventilation, refers to the system by which combustion gases are removed from the crankcase of an engine. “Positive” specifically indicates using manifold vacuum to pull fresh air through the crankcase, helping to more quickly evacuate the unwanted combustion gases. Proper PCV ensures that harmful blow-by vapors are replaced with fresh air, protecting your engine gaskets and preventing oil contamination. To help facilitate proper PCV plumbing, we’ve created a helpful diagram with a detailed explanation.
In this guide we will be covering engine designations for generation 3, 4, and 5 Chevrolet product engines. This will cover the release of the LS1 in 1997 and go to today’s Gen 5 LT7 in 2024. We have grouped these by generation and provided a brief explanation of what each engine code means to help inform you about what engine you want or have.
This resource page is designed to offer clients a list of Flag Motorsports recommended options for LS accessory drives, and intake manifold options.