1. Performance Racing Parts Offers
  2. sku: 6765701960611232
  3. HOLLEY 4781

HOLLEY 4781 Idle Corner

fits model: 850.

4781 Holley 850 4 Corner Idle

( Brand: Holley ), ( Manufacturer Part Number: 4781 )

Review HOLLEY Idle Corner fits 850

The Idle 850 Corner Carburetor, model number 4781, from Holley is a high-performance carburetor designed for enthusiasts looking to upgrade their engine's fuel delivery system. This carburetor features an 850 CFM (cubic feet per minute) double-pumper design, providing optimal air/fuel mixture for improved engine performance, especially in high-RPM situations.

The Idle 850 Corner Holley 4781 is equipped with a unique corner design, allowing for a more compact installation in tight engine compartments, while still maintaining the same performance as a standard Holley carburetor. The carburetor comes with a 1 5/8 inch primary bore and a 1 3/4 inch secondary bore, ensuring a smooth and efficient fuel delivery.

The Idle 850 Corner Holley 4781 features a vacuum secondaries system, which provides a richer fuel mixture at low RPMs for a smoother idle and better cold starting. The built-in accelerator pump ensures a quick and smooth transition between idle and throttle, providing a seamless power delivery.

The carburetor body is made of aluminum, which is lightweight and durable, reducing engine heat transfer and providing excellent corrosion resistance. The Holley 850 Corner Carburetor also comes with a fully adjustable primary and secondary metering, allowing for easy tuning to match your engine's specific needs.

In conclusion, the Idle 850 Corner Holley 4781 is a high-performance carburetor that offers a compact design, smooth fuel delivery, and easy tuning capabilities. It is a great choice for anyone looking to upgrade their engine's fuel delivery system for improved performance and reliability.

Pros of buying a Holley 4781 850 CFM Idle-Air Kit:

1. Increased Airflow: The Holley 4781 is designed to provide an increased airflow to your engine, which can improve performance and power.

2. Easy Installation: The kit comes with all necessary hardware for installation, making it a relatively easy DIY project.

3. Adjustable Idle Setup: The kit features an adjustable idle control, allowing you to fine-tune the idle speed to your engine's specific needs.

4. High-Quality Construction: Holley is known for its high-quality products, and the 4781 is no exception. The kit is made from durable materials that can withstand the rigors of regular use.

Cons of buying a Holley 4781 850 CFM Idle-Air Kit:

1. Expensive: Compared to other idle-air kits on the market, the Holley 4781 can be quite pricey.

2. May Require Professional Installation: While the kit is designed for DIY installation, some may find it challenging to install correctly, and may require professional help.

3. Compatibility Issues: It's important to ensure that the kit is compatible with your specific engine and vehicle make and model.

Conclusion:

The Holley 4781 850 CFM Idle-Air Kit is a high-quality product that can provide improved performance and power to your engine. However, its expensive price tag and potential compatibility issues are worth considering before making a purchase. If you have the necessary skills and resources to install the kit yourself, and are confident that it's compatible with your vehicle, then the Holley 4781 could be a worthwhile investment. Otherwise, it may be worth exploring other, more affordable options.

Recommendation:

I would recommend the Holley 4781 850 CFM Idle-Air Kit to those who are looking for a high-performance upgrade for their engine, have the necessary skills and resources to install it themselves, and are confident that it's compatible with their vehicle. However, for those who are unsure or have limited resources, it may be worth exploring other, more affordable options.

Details:

This has 4 corner idle with a billet base plate.

It has a PVC port in the reader and full manifold and ported outlet's. Jetting 80 82 PVC 64 squirts. The metering blocks have screw in idle feed restricts as well.

5 needle seat. 031iab the main body has had both the idle and high speed bleeds threaded for screw in bleeds.

specifications accperformanc:

  • for models: 850
  • brand: Holley
  • mpn: 4781

Ratings:

  1. Great customer ! Quick payment ! Highly valued ! Please shop with us again !! 10-01-16
  2. Good buyer! Highly recommended!! +++++ 09-26-16
  3. Thank You for Shopping. Excellent buyer 10-12-16
  4. Thanks for your Purchase & Fast Payment, Performance Dynamics 09-25-16

General accperformanc:

  • condition: Remanufactured
  • Motors > Parts & Accessories > Performance & Racing Parts > Accessories
  • in stock: Yes

Offer accperformanc:

  • : true
  • Started: October 16, 2016, 12:47 pm
  • best offer: false
  • # Sold: 0
  • # bids: 0
  • quantity: 1
  • min. bid: $200.00

Shipping accperformanc:

  • handling: 1 days
  • cost: $22.0
  • type: Flat

Returns accperformanc:

  • policy: no returns

Seller accperformanc:

  • zipcode: 48152
  • city: Livonia, Michigan

Payments accperformanc:

  • PayPal
for models: 850,
category: auto parts > performance & racing parts > accessories, sku: 6765701960611232,
Review#1 Great customer ! Quick payment ! Highly valued ! Please shop with us again !! ()
Review#2 Good buyer! Highly recommended!! +++++ ()
Review#3 Thank You for Shopping. Excellent buyer ()
Review#4 Thanks for your Purchase & Fast Payment, Performance Dynamics ()
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5 offers $69.95–$510.00 USD
  • Remanufactured. Offer #1 priced at $510.00 + $18.75 shipping estimate = $528.75* total. fm, competition drag racing double pumper carburetor. Is totally rebuilt, is in like new condition, and ready to install.+$18.75 shipping
  • New. Offer #2 priced at $69.95 + $0.00 shipping estimate = $69.95* total. Not sure if this is the right kit for your carburetor?. 4777, 4778, 4779, 4780 and .FREE SHIPPING
  • New. Offer #3 priced at $69.95 + $0.00 shipping estimate = $69.95* total. FREE SHIPPING
  • New. Offer #4 priced at $526.95 + $0.00 shipping estimate = $526.95* total. FREE SHIPPING
  • Used. Offer #5 priced at $235.00 + $28.00 shipping estimate = $263.00* total. NJC RACE PARTS.+$28.00 shipping

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