Toyota Supra MK4 2jz-gte JZA80 1jz R35 ignition coil kit
Toyota Supra MK4 (JZA80) or any 1JZ/2JZ-GTE engine to the Nissan R35 GT-R (VR38DETT) ignition coil system is one of the most effective ways to eliminate spark blowout in high-boost applications. The R35 coils are “smart coils” (built-in igniters) and are capable of supporting over 1,500 HP.
Core Components of the Conversion Kit
A complete “Plug & Play” kit typically includes:
-
Billet Bracket: A CNC-machined 6061-T6 aluminum plate that secures the R35 coils to the JZ valve covers.
-
Custom Coil Stalks/Boots: Since R35 coils are physically shorter than JZ coils, these custom-length silicone stalks with internal springs ensure a solid connection to the spark plug while fitting under the factory “valley” cover.
-
Coil Packs: Typically uses Genuine Hitachi (the OEM manufacturer for Nissan) or Denso R35 coils.
-
Conversion Harness: A Tefzel/Mil-spec wiring loom that bypasses the factory external igniter (DH61) and converts the 2-pin Toyota connectors to the 3-pin R35 connectors.
Comparison: 1JZ vs. 2JZ & VVTi vs. Non-VVTi
While the R35 coils themselves are universal, the bracket and harness differ based on your specific engine variant:
| Feature | Non-VVTi (1JZ/2JZ-GTE) | VVTi (1JZ/2JZ-GTE) |
| Ignition System | Wasted Spark (Factory) | Sequential (Factory) |
| Igniter | Requires “Igniter Delete” patch | No external igniter to delete |
| Wiring | Needs a conversion to Sequential | Mostly Plug-and-Play |
| Fitment | Fits under factory plastic cover | Fits under factory plastic cover |
[!IMPORTANT]
Sequential Ignition Required: R35 coils are designed for sequential firing. If you are converting a Non-VVTi engine, you must use an aftermarket ECU (Haltech, Link, Motec) to run these in sequential mode. Running them in “Wasted Spark” on a stock ECU will significantly shorten the life of the coils.
Top Recommended Manufacturers
Several companies specialize in these high-end conversion kits:
-
Platinum Racing Products (PRP): Widely considered the gold standard. Their “Next-Gen” stalks feature double-sealing O-rings to keep moisture out of the spark plug bores.
-
Haltech / Wiring Specialties: Offers a very robust full conversion kit that includes a high-quality PRO-series harness, making the electrical side of the swap foolproof.
-
Garage Whifbitz: A UK-based specialist known for kits that maintain a perfect OEM appearance, allowing the factory spark plug cover to sit completely flush.
Technical Performance Benefits
-
Spark Energy: R35 coils provide nearly double the spark energy of the 25-year-old factory Toyota units.
-
Dwell Time: For optimal performance at high boost (30+ psi), dwell times should be set to approximately 3.4ms to 4.0ms at 14V in your ECU software.
-
Availability: Unlike the aging and increasingly expensive OEM JZA80 coils, R35 coils are readily available at most major auto parts retailers or Nissan dealerships.
Would you like me to find the specific dwell time table for the Hitachi R35 coils to help you calibrate your ECU?
Reviews
There are no reviews yet.