E85 runs cooler, resists detonation, and frees up real power — but only if your fuel system can actually deliver it. Here's the full breakdown from someone who has built this kit on VQ engines specifically.
Why VQ Owners Switch to E85
Pump gas has a ceiling — for VQ engines, that ceiling shows up fast once you start modding. E85 changes the equation: cooler combustion temps, better resistance to detonation, and more power whether you're on ethanol or still running 91/93.
Full injector + fuel pump upgrade with tune. Same torque increase.
E85 runs significantly cooler than pump gas. Less prone to detonation.
Larger injectors and upgraded pump remove the factory fuel delivery cap.
Kit supports both — talk to your tuner about maps for each fuel type.
"Even if you don't switch to E85 right away, the bigger injectors and fuel pump still remove the power ceiling on pump gas. Either way you're making more power — the injectors are what the factory should've shipped."
What You Actually Need to Run E85
The conversion is three components plus a tune. No cutting, no pigtail adapters, no custom wiring. Everything plugs in.
Optional upgrades: fuel lines, fuel pressure regulator, flex fuel kit — sold externally. We work with CJM Motorsports for full fuel system builds.
600cc vs 1000cc — Which One Do You Need?
The most common question after "do I need a tune" — here's the actual answer based on build level, not guesswork.
- Daily drivers on E85 or pump gas
- Full bolt-on builds (no cams)
- Street builds and roll racing
- Plenty of headroom — you'll never max these out
- Perfect duty cycle, never hitting injector limits
- Cammed engines
- Forced induction / supercharger builds
- Cars pushing beyond factory design limits
- Not recommended for daily drivers
- Tuner dials back usage — headroom for future mods
Platform Fitment
The VQ layout makes this conversion more accessible than most platforms. The fuel pump hanger is right behind the passenger seat. The injectors sit under the upper intake manifold — four bolts, pull it, swap old for new, reinstall. Everything plugs into OEM connectors. Nothing gets cut.
Nissan: 370Z, 350Z
Infiniti: G37, G35, Q50, Q70, M37, FX35, FX37
Engine platform is what matters — not the chassis.
If you're also running the manifold or throttle body, do the E85 kit at the same time. You're already pulling the upper manifold — get all your mods in and tune everything in one shot. One shop visit saves you time and money on the tune.
Before You Order — Straight Answers
Yes, no exceptions. When you change fuel flow — injectors, pump, or E85 — the air/fuel ratio and fuel tables have to be recalibrated. Running without a tune will cause lean or rich conditions. That leads to engine failure. No exceptions.
The kit supports both, but you need a specific tune map for each fuel type. Talk to your tuner before switching fuels. If you want flex fuel capability, that requires a separate flex fuel kit sold elsewhere — we don't carry it because everyone and their mother does.
You need the right tune map loaded for whatever fuel you're running. Your tuner will set up a pump gas map and an E85 map. Don't switch fuels without the right map loaded — arrange this with your tuner beforehand.
The injectors are accessible if you're comfortable with a basic engine teardown. The fuel pump involves new wiring — if you're not confident in that work, pay a professional. This is a fuel system. TriggaSpec takes no liability for installation issues on the vehicle.
Ready to Remove the Cap?
The injectors are the fix the factory should've done. Bigger flow, better fuel delivery, more power on E85 or pump gas. Everything you need is in the kit.