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Injector Dynamics ID1750-XDS Injectors for 14mm Mazda RX-7 Applications
Injector Dynamics lists part number 1750.11.06.60.14.2 against every 14 mm Mazda RX-7 entry in its application table, covering the 79-84, 85-86, 87-92 and 93-95 model groups, and supplies it as a set of two. The 11 mm RX-7 variants use a different part number, so the injector bore size on the car decides which set is correct.
The ID1750-XDS is the high-flow member of the family used here, rated at 1728 cc/min at 3.0 bar on E10 certification fuel and listed as compatible with methanol, ethanol, MTBE, nitromethane and all known hydrocarbon fuels, which suits a boosted rotary running an alcohol blend.
Key Features
- Supplied as a dynamically matched set of two injectors in the 1750.11.06.60.14.2 configuration
- Published dynamic flow and offset data from 8 to 16 volts across the full pressure range
- Every dimensionally critical internal part made from corrosion-resistant material, per the X-Series design brief
- High-flow motorsport injector rated at 1728 cc/min at 3.0 bar on E10 certification fuel
- Compatibility with methanol, ethanol, MTBE, nitromethane and all known hydrocarbon fuels
- USCAR electrical connector
- Listed by Injector Dynamics for Mazda RX-7, 14mm applications
Fitment
Every 14 mm RX-7 group Injector Dynamics publishes uses this same part number, and the four listed groups run continuously from 1979 through 1995, so they are consolidated into a single verified year span below.
| Years | Make | Model | Notes |
|---|---|---|---|
| 1979-1995 | Mazda | RX-7 | Consolidated from the manufacturer entries RX-7 79-84, 85-86, 87-92 and 93-95, all listed with the 14 mm qualifier |
Injector Dynamics lists the 11 mm RX-7 groups under part number 1750.11.03.60.11.2 and the RX-8 secondaries under a further part number, so neither is covered by this set.
Specifications
| Detail | Value |
|---|---|
| Brand | Injector Dynamics |
| Model | ID1750-XDS |
| Manufacturer part number | 1750.11.06.60.14.2 |
| Nominal flow rate | 1728 cc/min at 3.0 bar (43.5 psi), measured with E10 emissions certification fuel at 49 C (120 F) |
| Maximum differential fuel pressure | 7.0 bar (101.5 psi) |
| Fuel compatibility | Compatible with methanol, ethanol, MTBE, nitromethane and all known hydrocarbon fuels |
| Electrical connector | USCAR |
| Configuration code | 11.06.60.14 as published by Injector Dynamics for the 14 mm RX-7 entries |
| Body length | 60 mm |
| Lower interface size | 14 mm |
| Set quantity | Two injectors |
| Listed application | Mazda RX-7, 14mm applications |
| Design intent | Designed specifically for motorsport use, per Injector Dynamics |
| Warranty | One year from date of original purchase against manufacturer defects |
| Weight and packaged dimensions | Not published by Injector Dynamics for this part number |
What's Included
- 2 Injector Dynamics ID1750-XDS fuel injectors in the 1750.11.06.60.14.2 configuration, supplied as one dynamically matched set.
- No box-contents list is published by the manufacturer for this configuration. Plan on the injectors alone and source seals, adapters or harness parts separately if the install needs them.
- Characterization data is published by the manufacturer rather than boxed with the set, and should be downloaded fresh before the engine is tuned.
About Injector Dynamics
Injector Dynamics built its reputation on characterization data rather than headline flow numbers, and the ID1750-XDS is published with dynamic flow and offset values across the full working range. Applications are listed individually, each pointing at one exact configuration and set quantity.
Related Parts
- Injector Dynamics ID1050-XDS injectors in the same 14 mm RX-7 configuration, part number 1050.11.06.60.14.2, for builds that need less flow
- Injector Dynamics ID1300-XDS injectors in the same 11.06.60.14 RX-7 configuration, listed in this store for the 93-95 group
FAQ
What is the published flow rating?
The manufacturer publishes a nominal flow rate of 1728 cc/min at 3.0 bar (43.5 psi), measured with E10 emissions certification fuel at 49 C (120 F) for the ID1750-XDS.
What is the pressure ceiling?
Injector Dynamics publishes a maximum differential fuel pressure of 7.0 bar (101.5 psi) for this model.
Are alcohol fuels a problem for these injectors?
No. Injector Dynamics publishes the compatibility as follows: Compatible with methanol, ethanol, MTBE, nitromethane and all known hydrocarbon fuels.
What is the connector type?
USCAR, as published in the manufacturer specification table.
What does dynamically matched mean here?
Injector Dynamics groups injectors so their dynamic flow behaviour tracks together, which is what its matched-set articles demonstrate.
What does the manufacturer require to keep the warranty valid?
Correct fuel type and proper fuel filtration. Injector Dynamics states that failing to do so reduces longevity and is not covered.
Should the retainer be removed before installation?
Not by default. Injector Dynamics treats removal as a modification to be carried out only on its instruction.
Can these be cleaned and tested?
Yes. Injector Dynamics runs a cleaning and inspection service and requires the whole set to be sent in so the results stay matched.
Can the factory injector data be reused?
No. The manufacturer publishes its own dynamic flow and offset tables, and those values should be entered before the engine is started.
Does this set cover the whole RX-7 production run?
It covers the four 14 mm groups Injector Dynamics publishes, which run from 1979 through 1995. Cars in those groups fitted with the 11 mm injector arrangement take the separate 11 mm part number.
Why only two injectors for a rotary engine?
The manufacturer lists this configuration in a quantity of two, which corresponds to the primary injector positions on the listed RX-7 applications rather than a full primary and secondary complement.
Will these work on an RX-8?
No. Injector Dynamics lists the RX-8 03-11 secondaries under a different part number entirely, so that application is outside the scope of this set.
Installation Instructions
No exact-part-number installation sheet or torque figure exists for this configuration. What follows combines the manufacturer's published cautions and connector guidance with a clear instruction to use factory service information for the engine.
- Confirm that part number 1750.11.06.60.14.2 is the configuration Injector Dynamics lists for 14 mm Mazda RX-7 applications before removing anything from the engine.
- Take down the four to seven digit serial numbers at the base of the connectors before the injectors go into the engine.
- Depressurise the system before anything is disturbed, then work through the factory service information for rail removal, which is the only published procedure for this engine.
- Resist the temptation to cut the plastic O-ring retainer off. Injector Dynamics warns that it cannot be refitted and that removal on the wrong application can destroy an engine.
- Check that the injector seats fully in both the rail and the port with the 60 mm body and its listed interfaces before committing to the install.
- Where injector connectors are being built up, the manufacturer's method is to strip about 5 mm of insulation, pass the wire through the seal into the terminal, line the bare conductor up with the crimp section and crimp.
- Either pin can take power or ground, because Injector Dynamics states the injector connectors are not polarity specific.
- All fastener torques come from the factory service information for the engine, because no manufacturer torque value exists for this part number.
- Configure the engine management system with the published ID1750-XDS characterization data, downloaded fresh, before cranking.
- With the engine still stopped, pressurise the system, inspect all seals and unions for leaks, and satisfy yourself that fuel filtration meets the manufacturer's warranty requirement.
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