Build, photos and text by Mike Mavrigian This build features a GM LS platform, bored and stroked to 408 CID, with a 4.0305” bore and 4.000” stroke. A few of the notable elements include adapting Gen 1 smallblock Chevy valve covers to LS heads and a conversion to carburetion, this time using a [...]
Stef’s is celebrating its 20-year anniversary with the introduction of a unique, new oil filter adapter for LS engines. It is the first of its kind. For the able LS engine trans-planter, the problem has not been one of finding the desirable power unit, rather one of getting it to fit within [...]
HP Books has released its latest technical book on the GM LS engine. Building the Chevy LS Engine is written specifically for engine builders, and is not a typical “tuner” or “engine swap” book. The new book covers rebuilding and performance modifications to the LS engine platform, including LS1, LS6, LS2 and LS7, LS3 and [...]
We’ve done a handful of project engines. What should we choose as the focal point of our next build? by Mike Mavrigian Ever since I asked our readers for their suggestions regarding our next engine build project, the response has been overwhelming. The suggestions have included a hi-po build of a Ford 4.6L [...]
The entire project series…Parts 1 through 6…are now available on this site. Plan to duplicate our 625.4 HP LS motor for a customer? This series provides every part source and part number, along with step by step prep and assembly details.
The COMP Cams billet aluminum belt tensioner is adjustable for belt tension and offers rock-solid serpentine belt guidance.
Whenever I build an engine, regardless of my confidence in terms of fitting and assembly detail, I’m always a bit apprehensive when it comes time to light the fire. But when things go picture-perfect and you hit high numbers without a single glitch, it’s a feeling that’s better than sex (I’m sure you know what I mean). This LS program proved to be a total success.
Our injectors are from Bosch (P/N 0280 156 127). These are the taller LS1 style at about 2.917″ tall. An intake manifold that is designed for LS2 injectors features a larger diameter injector port as compared to an LS1 manifold, so if you plan to run LS1 style injectors in an LS2 manifold, you’ll need [...]
Here’s our LS with our carburetor setup and coilpacks. This setup will utilize the MSD timing controller for ignition control/adjustment. No ECU is required for this approach, which makes it ideal for application in any street rod, muscle car, race car, etc. that is not wired for computer control. For our coilpack versions (for either [...]
Our coilpacks (to be used either with an EFI or distributorless carburetor setups) are MSD No. 8245 coils. Eight coils are used, with one coil dedicated to each spark plug. The MSD coils deliver up to three times the spark energy of the stock coils, as well as delivering multiple sparks. Maximum voltage is 44,000 [...]