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| Brand | EVIL ENERGY |
| Barrels | 4 |
| CFM | 750 |
| Carburetor Flange | Square bore |
| Choke Type | None |
| Secondary Throttle Type | Mechanical |
| Fuel Inlet | Dual |
| Calibration | Main Jets:#74 Secondary Jets:#84 Accelerator Pump Nozzle:0.031 inch Power Valve :4.5HG |
| Venturi Diameter |
Primary Venturi Diameter：1.375 inch Secondary Venturi Diameter:1.375 inch |
| Throttle Bore Diameter | 1.6875 inch |
| Carburetor Height |
3.25 inch |
| Compatibility | various high-performance intake manifolds and fuel systems |
| Remanufactured | No |
Why Upgrade to EVIL ENERGY Carburetors?
1. High-Performance Design with Mechanical Secondary Throttle
- Unreliable Secondary Control: Many carburetors use imprecise secondary throttle mechanisms that cause lag or uneven fuel delivery at high RPM, limiting engine power in performance scenarios.
- EVIL ENERGY Precision: Equipped with a mechanical secondary throttle for direct, responsive control over airflow to secondary barrels. This ensures quick, consistent transition from primary to secondary fuel delivery—critical for high-RPM performance, racing, or heavy acceleration, eliminating bogging and maximizing power output.
2. Precision Calibration for Optimal Air-Fuel Mixture
- Untuned Carb Shortcomings: Poorly calibrated carburetors lead to rich/lean conditions, rough idling, or reduced fuel efficiency, undermining engine performance and longevity.
- EVIL ENERGY Advantage: Pre-calibrated with #74 main jets, #84 secondary jets, a 0.031-inch accelerator pump nozzle, and 4.5Hg power valve. This fine-tuning ensures precise fuel atomization, crisp throttle response, and stable performance across all RPM ranges—from low idle to high-speed acceleration.
3. Versatile Compatibility to Reduce Modification Needs
- Restrictive Compatibility: Many carburetors are limited to specific intake manifolds or fuel systems, requiring extensive modifications (e.g., custom adapters, linkage overhauls) that add time and cost to high-performance builds.
- EVIL ENERGY Flexibility: Designed to work with various high-performance intake manifolds and fuel systems. Its square bore flange and compact 3.25-inch height fit most performance engine bays, significantly reducing the need for custom modifications and simplifying installation.
4. Choke-Free Design for Simplified High-Performance Setups
- Choke System Drawbacks: Electric or manual chokes add unnecessary complexity to high-performance or racing engines, where extra components (wiring, levers) can fail or clutter the engine bay.
- EVIL ENERGY Simplicity: No choke system eliminates potential failure points and reduces engine bay clutter—ideal for performance builds, racing setups, or engines optimized for consistent operating temperatures. Simplifies installation and maintenance without sacrificing performance.
5. Dual Fuel Inlets for Reliable High-Load Performance
- Single Inlet Limitations: Single fuel inlets can struggle to supply enough fuel during heavy load (e.g., wide-open throttle), leading to fuel starvation and power drops in high-performance scenarios.
- EVIL ENERGY Assurance: Dual fuel inlets ensure a steady fuel supply under extreme conditions, maintaining consistent performance during racing, towing, or aggressive acceleration. Prevents fuel shortages that limit power output.
6. Unbeatable Value vs. Premium Brands
- Premium Pricing Burden: Top-tier 750 CFM high-performance carburetors (like Holley's equivalent models) cost $799 or more, making performance upgrades inaccessible for many enthusiasts.
- EVIL ENERGY Savings: At just $499, our carburetor matches the performance of $799 premium options—delivering the same mechanical secondary control, precision calibration, and durability at over 37% less. High performance without the premium price tag.
7. Brand-New Construction for Long-Term Reliability
- Remanufactured Risks: Rebuilt carburetors reuse worn components (valves, gaskets, jets) that hide fatigue, leading to leaks, inconsistent fuel delivery, or early failure—especially under high-stress performance conditions.
- EVIL ENERGY Assurance: 100% new, with no recycled parts. Every component—from jets to throttle plates—is built to strict standards, ensuring reliability and longevity even in demanding high-performance applications.
FAQs About 750 CFM 4-barrel Carburetor
F: What makes the mechanical secondary throttle better for performance?
Q: A mechanical secondary throttle provides direct, instant control over secondary barrel activation, ensuring smooth transition from primary to secondary fuel delivery. This eliminates lag and maximizes power at high RPM—critical for racing or aggressive driving.
F: Is this carburetor suitable for engines without a choke system?
Q: Yes. Its 'no choke' design is intentional, making it ideal for high-performance engines, racing setups, or vehicles that operate at consistent temperatures. It simplifies the engine bay and avoids potential choke-related failures.
F: How does this carburetor compare to Holley's 750 CFM model?
Q: It matches Holley's performance (750 CFM, mechanical secondary, precision calibration) but costs significantly less: Holley's equivalent is $799, while ours is $499—offering the same high-performance capabilities at over 37% savings.
F: Will this carburetor fit my high-performance intake manifold?
Q: It's designed to work with various high-performance intake manifolds, thanks to its square bore flange and compact 3.25-inch height. While some setups may require minor adjustments, it significantly reduces modification needs compared to less compatible carburetors.
F: What's the benefit of dual fuel inlets?
Q: Dual inlets ensure a steady fuel supply during heavy load (e.g., wide-open throttle), preventing fuel starvation and maintaining consistent power in high-demand scenarios like racing or towing.
F: Is the carburetor pre-calibrated, or do I need to tune it?
Q: It comes pre-calibrated with #74 main jets, #84 secondary jets, a 0.031-inch accelerator pump nozzle, and 4.5Hg power valve. Most users can install it and start using it immediately—minor tuning may be needed only for highly customized engine builds.
F: Can this carburetor handle high-RPM engines (e.g., racing applications)?
Q: Yes. With 750 CFM airflow, a 1.6875-inch throttle bore, and mechanical secondary throttle, it's engineered to deliver the fuel and airflow needed for high-RPM performance, making it ideal for racing or high-output engine setups.
F: Why is there no choke? Will that affect cold starts?
Q: The no-choke design is optimized for performance engines that reach operating temperature quickly. For cold-start needs in daily driving, consider auxiliary cold-start systems—though it's rarely necessary for racing or high-performance builds.
F: Is this carburetor better than a remanufactured one?
Q: Absolutely. It's 100% brand-new, with no reused components, avoiding the hidden wear and failure risks of remanufactured carburetors. This ensures longer life and more consistent performance.
F: What's the venturi diameter, and how does it impact performance?
Q: Primary and secondary venturis are both 1.375 inches, balancing airflow velocity and volume to ensure efficient fuel atomization. This design enhances throttle response and stability across all RPM ranges, from idle to high-speed acceleration.
⚠️ APPLICATION RESTRICTIONS:
This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles.
The following vehicles are considered Uncontrolled (Non-Emissions Controlled) Vehicles:
- 1965 and older U.S. manufactured California Certified vehicles
- 1967 and older U.S. manufactured Federally Certified vehicles
- 1967 and older Foreign manufactured vehicle
The following vehicles are considered Emissions Controlled Vehicles:
- 1966 and newer U.S. manufactured California Certified vehicles
- 1968 and newer U.S. manufactured Federally Certified vehicles
- 1968 and newer Foreign manufactured vehicle
CFM Calculator
Enter engine parameters to calculate optimal CFM (Cubic Feet per Minute). Based on engine type and modification level, we’ll recommend the best carburetor size.
| Modification Level: | |
| Recommended CFM Range: | 0 - 0 |
If you have any other questions, please contact Customer Service at support@ievilenergy.com for assistance.
Brand Summary
| Policy | Details |
|---|---|
| Cancellation Policy | Orders can be canceled within 48 hours of placement. Refund processed in 3-5 business days. |
| Returns Policy | Returns accepted within 180 days. Full refund within 90 days; 15% fee for 90-180 days. |
| Non-Returnable Items | Only regular-priced items are eligible for refunds; sale items are non-refundable. |
| Refund Processing | If no refund received, check your bank/credit card. For ongoing issues, contact support@ievilenergy.com. |
Return Reasons
- Quality Issues: Provide photos/videos; we cover return shipping.
- Wrong Item Ordered: Buyer covers return shipping; email within 30 days.
- Change of Mind: Buyer covers return shipping; email within 30 days.
- Shipping Damage: Inspect packages; do not sign for damaged items.
- Incorrect Item Shipped: Contact within 7 days.
Price Protection Policy
Effective from August 25, 2024. Price drops within 7 days of purchase can be claimed.
Disclaimer
EVIL ENERGY reserves the right to interpret, modify, or terminate this policy in accordance with applicable laws and regulations.
If you need further information or assistance, feel free to ask!
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