I’m looking into building a hybrid offroad racer by adding an electric motor (BAS system) to a forced-induction, undersquare V8 for desert racing. My goal is to improve efficiency and show how electrification can enhance performance in this niche.
EVs can’t run races like the Baja 1000 without massive battery packs, so I’m sticking to a hybrid setup. Ideally, I’d like to convert my GMT800 SUV into a light hybrid using OEM parts and some custom management to integrate it with the existing PCM or manage both power sources independently.
The setup involves routing power through a manual transmission to maximize efficiency. With proper controls, I’m imagining pulse-glide driving, regenerative braking through the clutch, and potentially starting and stopping the engine efficiently when coasting.
Here’s my current plan:
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Use the IMS-style bellhousing motor from the 2005 Silverado hybrid. It bolts between the engine and transmission, and it’s designed for my vehicle platform. The Silverado hybrid also has 48V electric accessories, which can improve both performance and efficiency. Does anyone know the torque specs for this motor?
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Scavenge parts from a Ram eTorque system. The alternator motor provides 150 ft-lb of torque and comes with a compact 48V lithium pack. I’m thinking of using two of these packs to power additional motors and tune them for maximum performance.
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Combine these to create something similar to the Jeep 4xe but with higher output and GM-based components—essentially an “8xe.”
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Start with a naturally aspirated setup to test the hybrid integration, then move to a 363 stroker with forced induction (e.g., a 3L Whipple). Use an Atkinson/Miller cycle cam for higher compression, inspired by builds like the Mugen CRZ hybrid.
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Run it on ethanol, ideally from sustainable sources (e.g., seaweed). Ethanol burns cleaner, and the engine would perform well on it.
In a field of big displacement gas trucks, this hybrid setup could be revolutionary—nothing else makes 200-300 ft-lb of torque at 0 RPM.
Does anyone here have experience with similar projects or know of better groups for discussing DIY hybrid setups? I’ve done loose research for years but never tried a build like this before. There was a BAS kit I saw once that replaced the alternator with a massive electric motor, but that guy didn’t gain traction in the market. It’s unfortunate because the idea had potential.
Thanks for any feedback or suggestions!