ROCHESTER 17058278 Quadrajet Performance Mods 400/PERFORMANCE Mods/read

( Brand: Rochester ), ( Manufacturer Part Number: 17058278 ), ( Items Included: Gasket ), ( Fitment Type: Performance/custom ), ( Mounting Hardware Included: No ), ( Material: Aluminum ), ( Drive Type: Electric Choke ), ( Vintage Part: Yes ), ( Placement On Vehicle: Front ), ( Choke Type: Electric ), ( Type: Quadrajet ), ( Mounting Flange Type: Spread Bore ), ( Country/region Of Manufacture: United States )

Review ROCHESTER Quadrajet Pontiac 400/performance Mods/read fits 400 1978

The Rochester Quadrajet 4-barrel carburetor, model number 17058278, is a high-performance upgrade for your 1978 Pontiac 400 engine. This carburetor is designed to increase horsepower, improve throttle response, and deliver a more efficient fuel mixture for optimal engine performance.

The Rochester Quadrajet 17058278 is a direct fit replacement for the original 4-barrel carburetor on 1978 Pontiac 400 engines. It features a four-barrel design with a primary metering circuit that provides precise fuel delivery to the engine for improved fuel economy and performance. The carburetor is equipped with a vacuum secondary system, which allows for additional fuel delivery under high engine loads, such as during acceleration or towing.

One of the key advantages of the Rochester Quadrajet 17058278 is its adjustable features. The carburetor has adjustable primary and secondary venturi sizes, as well as adjustable fuel pump pressure and idle mixture screws. This allows for easy tuning to optimize performance for your specific engine and driving conditions.

The Quadrajet 17058278 also features a high-quality construction to ensure durability and reliability. The carburetor is made of cast aluminum and has a polished finish, which not only looks great but also helps to dissipate heat for improved performance. The carburetor also includes a high-flow air cleaner and a chrome-plated throttle linkage for added style.

In summary, the Rochester Quadrajet 17058278 is a high-performance upgrade for your 1978 Pontiac 400 engine. It provides precise fuel delivery, adjustable features for easy tuning, and a durable construction for reliable performance. This carburetor is a great way to improve the horsepower, throttle response, and fuel economy of your Pontiac 400 engine.

1. Increased power and acceleration: The performance modifications to the 400 engine, such as upgraded exhaust, intake, and camshaft, can provide a significant increase in horsepower and torque, making the car more fun to drive.

2. Improved fuel efficiency: The Quadrajet carburetor is known for its ability to provide a smooth and efficient fuel mixture, which can help improve fuel economy compared to some other carburetors.

3. Retro appeal: The classic look of the 1978 Pontiac, along with the performance modifications, can make it a standout vehicle that turns heads and attracts attention on the road.

1. Maintenance and repair costs: Performance modifications can increase the complexity and cost of maintaining and repairing the car. This may include the need for specialized tools, parts, and labor.

2. Potential reliability issues: Modifications to the engine, transmission, and other systems can increase the risk of reliability problems, such as engine knocking, transmission slipping, or electrical issues.

3. Insurance costs: Performance modifications can also increase the cost of insurance, as the car may be considered a higher risk to insure due to its increased power and performance.

Conclusion: Buying a 1978 Pontiac with a Rochester Quadrajet carburetor and performance modifications can be a fun and exciting experience, providing increased power, improved fuel efficiency, and retro appeal. However, it is important to consider the potential downsides, such as increased maintenance and repair costs, potential reliability issues, and higher insurance costs. If you are willing to invest the time, money, and effort into maintaining and repairing the car, and are willing to accept the higher insurance costs, then a modified 1978 Pontiac could be a great choice for you. But, as always, it's recommended to have a professional mechanic inspect the car before purchasing to ensure that the modifications have been done correctly and that the car is in good overall condition.

Details:

APT piston notched so a straight edge screw driver allows easy precise adjustment. Primary and secondary well plugs tested sealed with epoxy. This allows easy access to the APT tower which can now be turned make on fly adjustments part throttle air fuel curve. Fully disassembled.

Factory air horn APT sealed plug removed and opening is tapped for a removable Allen head set screw. Factory cfm limiter carefully removed and a set screw installed to allow custom settings, it mild wild just by turning. Rochester Quadrajet 17058278 Pontiac 1978 400 engine. Any questions please reach out anytime.

Painted with high temp paint/silver for appearance and oil/fuel resistance. Double wall cardboard added for protection plenty of room one inch complete foam sponge. Fully adjustable and modified idle, part throttle full for performance. Condition is Remanufactured.

Very nice tuner mod.instructions included. Primary throttle shaft bushings replaced with Elite self lubed bronze oversized 5/8 replacements. Baked three hours Pontiac Screaming Chicken Tramp Stamp tattoo beautiful. Secondary fuel well restrict holes for faster refill after a full throttle rip emulsion tubes.

Very smooth throttle pivot motion. Accelerator shooter holes slightly and tested to shoot two fast solid streams accelerator pump shot duration linkage converted quick change version. These mods will eliminate any lean lag/bog when going full throttle. 800 cfm bump core.

Idle air bypass added to base plate eliminate nozzle drip and allow smoother idle in performance applications keep it on the circuit off main. Primary to secondary linkage modified for fast opening. Pontiac half hidden best version secondary air flaps allow instant fuel spray from the pull over shooter holes. O Hanger .plenty of guzzling.

D idle mixture holes to allow full range of air/fuel ratio. Smoke stack large ailed vent automatic transmission throttle arm, compatible with turbo 350/200r4/700r4/ect. This eliminates any vacuum leaks/erratic idle due to wear. New stainless steel screws and Lactate on assembly.

Shipped by USPS PRIORITY MAIL in their large box.

part #: 17058278 prices

• $38.60-$500.49

specifications carbcoon:

• for models: 400
• for makes: Pontiac, Rochester
• for years: 1978
• brand: Rochester
• mpn: 17058278
• items included: Gasket
• fitment type: Performance/custom
• mounting hardware included: No
• material: Aluminum
• drive type: Electric Choke
• vintage part: Yes
• placement on vehicle: Front
• choke type: Electric
• type: Quadrajet
• mounting flange type: Spread Bore
• country/region of manufacture: United States

general carbcoon:

• Car Truck Parts Accessories > Air Fuel Delivery > Carburetors
• condition: Remanufactured

offer carbcoon:

• best offers: True
• sold: 0
• started: June 21, 2024
• options: Ship-to-home
• availability: In Stock
• quantity: 1

shipping carbcoon:

• type: Calculated
• carrier: USPS
• cost: $41.70
• transit: 5-10 Days
• class: Expedited
• service: USPS Priority Mail

returns carbcoon:

• time: 30 Days
• paid by: Buyer
• policy: Returns Accepted

payments carbcoon:

• credit card: Visa
• wallet: Google-pay

seller carbcoon:

• city: Rosedale, New York
• # reviews: 593
• rating: 100.0%

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