Here is what changes with an RB26 injector upgrade, from E85 and the resistor pack to injector fitment and fuel rails. We supply parts; your tuner sizes the injectors and sets them up.
Short answer
- E85: needs more fuel than petrol for the same power.
- Resistor pack: whether it stays depends on the injectors you fit, so ask your tuner.
- Fitment: injector length, rail bore and plug have to match your rail and loom.
Stock RB26 injectors
Ask your tuner to confirm the injectors fitted to your engine before you choose an upgrade.
Sizing for petrol and E85
E85 needs more fuel than petrol for the same power, so injectors that suit a petrol build can run short on E85. The right size depends on your power target, fuel pressure and fuel, so your tuner works it out for your build.
Which injectors fit
Most Injector Dynamics fitments use one of two lengths, 48 mm or 60 mm, and one of two rail bores, 11 mm or 14 mm. ID lists the ID1050x set 1050.60.11.D.6 for the R32, R33 and R34 GT-R with an 11 mm rail bore. ID rates the ID1050x at 1065 cc/min at 3.0 bar on petrol, for up to 10 bar differential fuel pressure and all known fuels, with a USCAR plug.
| Injector set | Part number | Rail bore |
|---|---|---|
| ID1050x Nissan RB, set of 6 | 1050.60.11.D.6 | 11 mm |
| ID1050x, set of 6 | 1050.60.11.14.6 | 11 mm |
| ID1300x, set of 6 | 1300.60.11.14.6 | 11 mm |
| ID1750x, set of 6 | 1750.60.11.14.6 | 11 mm |
| ID1750x, set of 6 | 1750.60.14.14.6 | 14 mm |
| ID2600x, set of 6 | 2600.60.11.14.6 | 11 mm |
| ID2600x, set of 6 | 2600.60.14.14.6 | 14 mm |
ID's own fitment list names sets ending .D.6 for the R32, R33 and R34 GT-R and lists the other sets above for other engines, so check fitment with your tuner before you order.
ID1050x Nissan RB set | ID1050x 11 mm set | ID1300x 11 mm set | ID1750x 11 mm set | ID1750x 14 mm set | ID2600x 11 mm set | ID2600x 14 mm set
ASNU's Bosch-made injectors have a Bosch plug, and ASNU makes a plug-in adapter for Nissan JECS looms. Check which connector your loom uses before you order.
ASNU Bosch 980cc injector | ASNU Bosch 1080cc injector | ASNU 2000 injector | ASNU adapter, Bosch to Nissan JECS
The resistor pack
Whether the resistor pack stays depends on the injectors you fit, so check with your tuner. Your tuner or an auto electrician does the wiring and sets the injector data in the ECU.
Fuel rails
Radium's 20-0217 is an upgrade rail for the R32, R33 and R34 RB26DETT, not a top-feed conversion. It takes OEM or OEM-equivalent injectors, has three 8AN ORB ports and comes without fittings; Radium sells the 20-0217-PK plumbing kit separately.
Radium RB26DETT fuel rail 20-0217 | Radium plumbing kit 20-0217-PK | Tomei delivery pipe, Denso | Tomei delivery pipe, JECS
The rest of the fuel system
Plan the fuel pump and ECU with the injectors.
RB26 fuel pump upgrade guide | Haltech vs Link GT-R ECU guide | Skyline fuel parts | R32 GT-R fuel parts | R33 GT-R fuel parts | R34 GT-R fuel parts
Ordering
Injector Dynamics and Tomei parts are Price on application. Use Request a price on the part, or get in touch to check your build. ASNU and Radium parts are special orders from UK suppliers. Injector Dynamics sets are special orders too, and we confirm their timings with your quote. Tomei parts come from Japan:
Imported parts: usually 1 to 2 weeks at the minimum. The exact time depends on which country the part is coming from, whether you choose express or standard shipping, the courier used, and how quickly UK customs releases the shipment. We'll confirm the options and timings when we send your quote.
Contact | Delivery and returns | Injector Dynamics | ASNU | Radium | Tomei
FAQ
How much bigger do injectors need to be for E85?
E85 needs more fuel than petrol for the same power, so injectors that suit a petrol build can run short on E85. The right size depends on your power target, fuel pressure and fuel, so your tuner works it out before you order.
Do I need to remove the RB26 resistor pack?
It depends on the injectors you fit, so check with your tuner. Your tuner or an auto electrician does the wiring and sets the injector data in the ECU.
Which Injector Dynamics set fits an R32, R33 or R34 GT-R?
ID lists the ID1050x set 1050.60.11.D.6 for the R32, R33 and R34 GT-R with an 11 mm rail bore. Most ID fitments use a 48 mm or 60 mm length and an 11 mm or 14 mm rail bore, so match the set to your rail and loom.
Do I need a new fuel rail with bigger injectors?
Not always. Radium's 20-0217 rail is an upgrade rail that takes OEM or OEM-equivalent injectors and adds three 8AN ORB ports. It comes without fittings, and Radium sells the 20-0217-PK plumbing kit separately. Ask your tuner whether your build needs a new rail.