EMPI Main Jet for HPMX / IDF / IDA / DCOE Carburetors — 1.70mm calibrated brass | Porsche 914 (1970-1976) (43-5313-0)
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EMPI 1.70mm Main Jet — HPMX / IDF / IDA / DCOE Carburetors (Porsche 914 1970–1976, 43-5313-0)
Short answer: The EMPI 43-5313-0 is a genuine EMPI 1.70mm calibrated brass main jet for EMPI 40/44 HPMX, Weber 40/44/48 IDF and 48 IDA, EPC 48/51, and Dellorto DCO/DCOE carburetors, including those on the 1970–1976 Porsche 914. It meters fuel through the main high-speed circuit at cruise and wide-open throttle and is sold individually.
Part numbers: EMPI 43-5313-0 / 4353130 · 1.70mm main jet
Vehicle Fitment
| Years | Vehicle | Notes |
|---|---|---|
| 1970–1976 | Porsche 914 | With EMPI 40/44 HPMX, Weber 40/44/48 IDF / 48 IDA, EPC 48/51 or Dellorto DCO/DCOE carburetors |
Specifications
| Specification | Detail |
|---|---|
| Part number | 43-5313-0 |
| Manufacturer | EMPI |
| Orifice size | 1.70mm |
| Material | Machined brass, precision-drilled orifice |
| Fits | EMPI 40/44 HPMX, Weber 40/44/48 IDF and 48 IDA, EPC 48/51, Dellorto DCO/DCOE |
| Sold as | Each |
| Boxed dimensions (listed) | 2 x 1 x 1 in |
| Shipping weight | 0.022 lb |
Why It Matters
Near the top of the rev range a properly jetted engine keeps pulling and a lean one falls flat, and the difference lives in one brass orifice. Reading the plugs after a hard run tells you which way to go: chalk-white for starved, sooty black for rich.
Installation Notes
- Size up to richen a lean top end, size down to lean out a rich mixture.
- Grab the sizes on either side to bracket your tune.
- If you are unsure this fits your car, contact us with your year and model before ordering.
Frequently Asked Questions
- What does a 1.70mm main jet do in a Weber IDF or Dellorto DCOE? A genuine EMPI 1.70mm main jet is the brass metering jet that controls fuel flow through the carburetor's main high-speed circuit, at cruise and wide-open throttle.
- Will the EMPI 43-5313-0 fit my Porsche 914? It fits 40/44 HPMX, Weber 40/44/48 IDF, 48 IDA, EPC 48/51 and Dellorto DCO/DCOE carbs, including those on the 1970–1976 Porsche 914.
- Should I go up or down a main jet size? Size up to richen a lean top end, size down to lean out a rich mixture.
- How many main jets do I need? Each jet is sold individually; grab the sizes on either side to bracket your tune.
- What is the EMPI part number for the 1.70mm IDF main jet? EMPI part number 43-5313-0, a calibrated 1.70mm main jet sold individually.
- How does it ship? Ships standard ground from our Orange, California shop.
⚠ 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.
