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| We decided to use Garrett GT28RS Disco Potato turbos. The Disco Potatos are a ball bearing small frame turbo using Garrett’s ultra efficient 60 trim BCI 18 compressor wheel with a TO4B compressor housing with a wide diffuser. This gives a really high compressor efficiency across a wide range. The exhaust side is also a really efficient 76 trim 9 blade NS111 turbine. We chose a smaller .64 A/R turbine housing for fast response and low spool speed, something we figured would be really important in a drift car. The sacrifice would be with increased back pressure and less peak power. The Disco Potato also uses a ball bearing center section for low friction and fast spool. The ball bearing center section is floated in oil for good shaft motion control and harmonic damping for long life. |
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| JWT uses high sil moly iron for their cast exhaust manifolds for maximum heat resistance and good reliability. No warping or cracking here. They are sized to allow the fitting of larger compressor housings like the TO4B. The motor mounts must be trimmed for intake tube clearance. The area to be trimmed is marked here. A tubular header is better for ultimate power production but cast iron is way better for long term reliability. The manifolds have provisions for stainless steel heat shields, another important feature. |
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| The JWT kit also has these high quality cast iron O2 sensor housings/turbo outlets. The housings have a cast in divider to separate the exhaust from the wastegate flow. This improves turbo spool and increases power. These castings save us from having to make very hard to fabricate parts. |
This meant that to participate we could not use the resources of the mighty Falken Motorsports Team and we would be going to make the trip as privateers using Dai’s Street Class 350Z roadster as the basis of a competitive drift car. The main problem was that the Z did not have the horsepower, having a stock engine and a very mild HKS street supercharger kit. The Z only had about 290 whp, not enough to drift at a pro level.
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| The Greddy turbo kit intercooler bolted straight to our car and saved fabrication time. Much of the charge piping could be used from the Greddy kit. |
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| We used Hose Techniques couplers throughout the system. The Hose Techniques couplers are high quality silicone with Nomex fabric reinforcement. Nomex is much stronger and more heat resistant than the polyester used in typical couplers. We like the glossy easy to keep clean finish of the Hose Techniques couplers as well. |
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| Non rusting all stainless steel Hose Techniques T-Bolt clamps were used throughout the system. These clamp more securely and are less likely to damage the hose than regular worm gear clamps. |
