Hughes Race Built (HRB) is a company in Auckland, New Zealand specializing in building race engines. One engine they build is a Toyota 1UZ V8 for Superstock racing. Their stage 2 carbureted engine produces 510 horsepower at 7250 rpm and 380 lb-ft of torque at 6250 rpm on Avgas. The engine features a 0.5 mm over bored block (248 ci or 4.064 L), 10.0:1 compression, forged pistons and rods, and lightened/polished crank. On top sits ported heads with oversized valves, HPH ported intake manifold, Kelford/HRB camshafts, Kelford beehive springs, Titanium retainers, and Holley XP carburetor.
Source: Hughes Race Built via BangShift
Imagine how much power it would have with FI!
Imagine how much it would not. EFI gives you better drivability…you can change altitude easily. But as far as max HP goes it does not make a difference and when you go with “bigger” cams most EFI can’t handle the rough low RPM idle. Nascar engines have carb restrictions in place to keep the power down…
Are they limited to a max hp by rules? This just isn’t that impressive.
If I understand their FB post correctly, they are limited on compression, displacement, 4-barrel carb, and 0.5-inch valve lift.
Wow! Such short valve lift. Given the limitations, those numbers aren’t bad.
Its impressive considering these engines are in ls400s which is a large luxury sedan and makes like 260 hp stock
15.6 bar BMEP at peak hp. Well done! That’s a proper race engine.
That’s Awesome I want one for my truck 1998 Tacoma Base truck with automatic