Upgraded Injection Pump 1984-1993 6.9L/7.3L IDI
Upgraded Injection Pump 1984-1993 6.9L/7.3L IDI
The mechanical injection pump meters and pressurizes the fuel sent to your IDI's injectors. A worn pump can compromise starting, running quality and power; a stock pump can also become a fuel-delivery limit on a modified...
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Give your IDI the fuel delivery its build needs
The mechanical injection pump meters and pressurizes the fuel sent to your IDI's injectors. A worn pump can compromise starting, running quality and power; a stock pump can also become a fuel-delivery limit on a modified engine. These R&D pumps offer calibrated fueling options from naturally aspirated upgrades to serious turbocharged builds.
Choose by engine setup first. More pump capacity becomes useful power when the turbo, injectors and engine can support it. Pump model numbers are not horsepower gains.
RD2-HPNA — naturally aspirated trucks
Built for an IDI without a turbo. R&D specifies an approximately flat 70cc fuel curve and 3,800-rpm defueling, compared with the stock pump's 3,400-rpm defueling. It adds fueling capability for an NA setup; monitor exhaust temperature with a pyrometer.
RD2-80 — stock-based turbo trucks
The conservative turbocharged upgrade, with a fuel curve intended for trucks without head studs. Rated fueling is 80cc at 2,800 rpm. R&D does not recommend this model for naturally aspirated engines; select HPNA for that application.
RD2-90 — a stronger all-around turbo setup
A step up for a properly supported street or tow build. R&D rates an optimized manual-transmission combination with Stage 1 injectors at approximately 250 wheel hp and 550 lb-ft at the wheels. Head studs are recommended; R&D does not recommend this pump on an unstudded engine.
RD2-110 — upgraded-turbo performance
For a build beyond the original turbo's useful fueling range. Internal strength upgrades include a larger cam pin and roller input thrust bearing. Head studs are required and an intercooler is recommended. R&D specifies an appropriate upgraded turbo and does not recommend factory-based turbos or older turbo kits for this pump.
RD4-130 — approximately 350 wheel-hp fueling capability
A four-plunger option between the 110 and 150, with a new hydraulic head assembly. R&D identifies it with the 350 wheel-hp level on a suitable build. An upgraded turbo and head studs are required; an intercooler is highly recommended.
RD4-150 — approximately 400 wheel-hp street builds
R&D's high-output street pump retains a near-stock timing curve and is advertised to support approximately 400 wheel hp and over 800 lb-ft at the wheels. An upgraded turbo, head studs and intercooler are required; stronger factory-turbo rods or a suitable forged-rod conversion are highly recommended.
RD4-MOD — maximum-effort fueling
For a fully developed competition-oriented IDI. R&D advertises fueling capability beyond 500 wheel hp with the correct supporting modifications. Street manners vary, and its locked-out dynamic timing requires a specific installation and timing plan with your builder.
These are manufacturer-described capabilities for complete combinations, not pump-only gains or guarantees for your engine. The RD2-110 and RD4 models are special-order pumps; the build and core arrangements below still apply.
Choose your IDI pump and core arrangement
For the listed 1984–1993 6.9L/7.3L IDI applications. Choose the pump model to suit the engine and supporting modifications, then choose how you will handle the old pump core.
- Built to order: lead times can extend to 3 months or more. Confirm the current queue before scheduling the truck’s downtime.
- Sending in first: your core must be received before the order can proceed under this option. Plan for the truck to be down while the pump is out.
- Send in after ($100): pays the selected core charge so you can keep the old pump until the replacement is ready. This does not bypass the build queue.
Questions before you order
Which pump should I choose?
Use the model guide above. RD2-HPNA is for naturally aspirated trucks; RD2-80 is a stock-based turbo upgrade. RD2-90 and larger pumps need the stated engine and airflow support. Share your turbo, head-stud status, injectors and power goal if you need help matching a pump.
I need to keep driving. Which core option should I select?
Choose “Send in after ($100)” if you need to retain your existing pump while waiting. “Sending in first” is a core-first order, not an immediate exchange shipment.
Where do I send the core, and when is a refund processed?
Reply to your order confirmation for the correct return address, eligibility and return instructions before shipping a core. Keep the carrier tracking number. Delivery of a core is not the same as completed inspection or an approved refund.
What if I selected the wrong core option?
Contact us with your order number as soon as possible. We can review the order and any core-charge difference before you remove or ship your pump.
When will my order ship?
Availability and preparation time depend on the selected part, finish and configuration. Expedited shipping is the carrier service after dispatch; it does not shorten a build or supplier lead time. If you have an installation deadline, Call (979) 575-0024 to check the selected item before ordering.
Need help with your setup? Call (979) 575-0024. Please have your model year, engine and current modifications ready.
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FAQ
How long does shipping take?
Shipping cost is calculated at checkout. Dispatch timing depends on the product and options you choose; delivery timing also depends on your destination and shipping service.
Need parts by a specific date? Call (979) 575-0024 before ordering to confirm availability and the current dispatch estimate for your exact setup. Review our shipping policy for details.
How do I know if a product fits my truck?
Each product page lists the year, make, and model it fits.
If you’re unsure, you can message us through our website, email, or Facebook, and we’ll confirm fitment for you.
Do you offer installation?
Yes. PSC Automotive & Diesel Repair installs everything we sell.
Call or message us to schedule an appointment.
What is your return policy?
- Returns accepted on new, unused items.
Some items are subject to a restocking fee, depending on the manufacturer.
Electrical parts, tuners, and custom-built items are non-returnable.
Full details are on our Refunds page.
What is your warranty policy?
Our warranty matches the manufacturer’s warranty.
If a part fails or has a defect, we will work with the manufacturer to get it replaced.
We do not warranty parts that were:
Installed incorrectly
Damaged by lack of maintenance
Removed or messed with after installation
Installed by another shop after we installed it
Full warranty details are on our Warranty page.
Will I get tracking information?
Yes. Tracking is emailed to you as soon as your order ships.
Check your spam folder if you don’t see it.
Do you offer customer support?
Yes! You can contact us anytime at:
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We reply quickly during business hours.