Project Toyota Supra MKIV: Part 6 – 800whp Build Update


Let's talk about some products we haven't had a chance to feature yet.


In anticipation of running E85 fuel, we ditched the previous HKS/Denso 1000cc low-impedence injectors for these lovely 2150cc/min (205 lb/hr) low-impedence units from Fuel Injector Clinic. We’ll have more details when we discuss the full fuel system soon.

We'll also be installing our twin Walbro 485 LPH E85-compatible fuel pumps shortly.

The factory cast timing belt tensioner bracket is something that fails on a lot of modified Supras and ours was no exception a couple of years back. It’s potentially a very bad event because you don’t want the timing belt to jump teeth. Powerhouse Racing sells a billet tensioner bracket that is sure to last the life of the car and never leave you stranded on its behalf.

Actually, there is a lot more stuff coming from Powerhouse Racing because, when it comes to finding Supra-specific aftermarket products, these guys are one of the top dogs.  PHR has so many products to choose from that would otherwise take hours and hours to custom fabricate.  Products I'm talking about include different sized exhaust manifolds with different wastegate setups, 4-in downpipes, intercooler kits, turbo kits, oil catch can kits, billet tensioner brackets, power steering relocation kits for Hypertune manifolds, tons of engine dress up, etc.


Here's the Fluidampr crank damper pulley that was featured in Part 2. With any modification to the bottom end, the engine harmonics are altered. On a high-revving car, this makes it even more important to have good crank damping to avoid engine damage.

To guard against a timing belt failure, we’re running a heavy-duty Gates belt.

Straight up, Gates belts mean business. If you don’t believe us, read our Inside 10,000 HP article, where you'll see that even some of the top Nitro teams in the NHRA use Gates belts. But even more pertinent to our project, Gates was the actual OE supplier to the Toyota Supra back in the 90s! “Being OE means our engineers worked with Toyota from the beginning to determine construction and other synchronous drive specifications,” says Justin Herbert, Product Manager to Gates timing belt division.

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