EMPI 0.70 Accelerator Pump Jet — D Series Carburetor Tuning | Porsche 914 1970-1976 (44-1099-0)
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The EMPI 44-1099-0 is a genuine EMPI 0.70 accelerator pump jet for EMPI D-Series (EPC) carburetors, as used on the 1970–1976 Porsche 914 and air-cooled VW engines. It meters the fuel squirt the accelerator pump delivers on throttle tip-in, so it is the part you change to tune off-idle hesitation or bog. Sold each.
Part numbers: EMPI 44-1099-0 / 4410990 / 44 1099 0
Fitment
| Years | Vehicle | Notes |
|---|---|---|
| 1970–1976 | Porsche 914 with EMPI D-Series (EPC) carburetor | Listed fitment |
| Not specified | Air-cooled VW engines with EMPI D-Series (EPC) carburetor | Fits by carburetor, not by chassis |
If you are unsure this fits your car, contact us with your year and model before ordering.
Specifications
| Spec | Detail |
|---|---|
| Brand | EMPI |
| Part number | 44-1099-0 |
| Type | Accelerator pump jet (threaded) |
| Size | 0.70 |
| Carburetors | EMPI D-Series (EPC) |
| Function | Meters the accelerator pump fuel shot on throttle tip-in |
| Boxed dimensions (as listed) | 2 x 1 x 1 in |
| Shipping weight (as listed) | 0.03 lb |
Why It Matters
When a worked engine gulps and goes momentarily lean as you open it, the pump shot is falling short. This 0.70 accelerator pump jet richens the squirt through an EMPI D Series carburetor, feeding a larger motor enough fuel to take throttle without a flat spot.
Installation Notes
The pump jet threads into the pump discharge circuit of the D-Series carburetor.
Jets are sold each, so you can match both barrels or jet each one to suit.
Move one size at a time and road-test between changes to dial out hesitation and bog.
Frequently Asked Questions
What carburetor does the EMPI 44-1099-0 pump jet fit?
The EMPI 44-1099-0 fits EMPI D-Series (EPC) carburetors, including those on the 1970–1976 Porsche 914 and air-cooled VW engines.
What does a 0.70 accelerator pump jet do?
It meters how much fuel the accelerator pump squirts when you open the throttle, which controls off-idle response. The 0.70 size is one step in EMPI's D-Series pump jet range.
Why does my carbureted VW or 914 stumble when I hit the throttle?
A stumble or bog right as the throttle opens, that clears once the engine is moving, usually points to the pump shot. Changing the pump jet size one step at a time is how that tip-in hole is tuned out.
What is the EMPI part number for the D-Series 0.70 pump jet?
EMPI part number 44-1099-0 (also searched as 4410990).
Is the pump jet sold individually or in pairs?
It is sold each, so order one per barrel you want to change.
⚠ California Proposition 65 Warning: This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
