326 cu in Pontiac V8
E949145
The 326 cu in Pontiac V8 is a mid-displacement American V8 engine produced by Pontiac in the 1960s, known for powering intermediate models like the LeMans with a balance of performance and everyday drivability.
All labels observed (1)
| Label | Occurrences |
|---|---|
| 326 cu in Pontiac V8 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T11841288 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: 326 cu in Pontiac V8 Context triple: [Pontiac LeMans, notableEngine, 326 cu in Pontiac V8]
-
A.
389 cu in Pontiac V8
The 389 cu in Pontiac V8 is a classic American overhead-valve V8 engine from the late 1950s and 1960s, best known for powering early Pontiac performance models and helping launch the muscle car era.
-
B.
400 cu in Pontiac V8
The 400 cu in Pontiac V8 is a popular American V8 engine introduced in the mid-1960s, widely known for powering performance models like the GTO, Firebird, and Trans Am during the muscle car era.
-
C.
Chevrolet 409 cubic inch V8
The Chevrolet 409 cubic inch V8 is a legendary early-1960s big-block engine famed for its high performance and association with Chevrolet’s muscle-era full-size cars.
-
D.
Pontiac V8 engine family
The Pontiac V8 engine family is a series of American V8 internal combustion engines produced by Pontiac from the mid-1950s through the late 1970s, widely known for powering many of the brand’s high-performance muscle cars.
-
E.
Ford 385-series V8
The Ford 385-series V8 is a family of big-block overhead-valve engines produced by Ford from the late 1960s through the 1990s, widely used in high-performance muscle cars and heavy-duty trucks.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: 326 cu in Pontiac V8 Target entity description: The 326 cu in Pontiac V8 is a mid-displacement American V8 engine produced by Pontiac in the 1960s, known for powering intermediate models like the LeMans with a balance of performance and everyday drivability.
-
A.
389 cu in Pontiac V8
The 389 cu in Pontiac V8 is a classic American overhead-valve V8 engine from the late 1950s and 1960s, best known for powering early Pontiac performance models and helping launch the muscle car era.
-
B.
400 cu in Pontiac V8
The 400 cu in Pontiac V8 is a popular American V8 engine introduced in the mid-1960s, widely known for powering performance models like the GTO, Firebird, and Trans Am during the muscle car era.
-
C.
Chevrolet 409 cubic inch V8
The Chevrolet 409 cubic inch V8 is a legendary early-1960s big-block engine famed for its high performance and association with Chevrolet’s muscle-era full-size cars.
-
D.
Pontiac V8 engine family
The Pontiac V8 engine family is a series of American V8 internal combustion engines produced by Pontiac from the mid-1950s through the late 1970s, widely known for powering many of the brand’s high-performance muscle cars.
-
E.
Ford 385-series V8
The Ford 385-series V8 is a family of big-block overhead-valve engines produced by Ford from the late 1960s through the 1990s, widely used in high-performance muscle cars and heavy-duty trucks.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
Pontiac V8 engine family member
ⓘ
V8 engine ⓘ automobile engine ⓘ |
| aspiration | naturally aspirated ⓘ |
| blockMaterial | cast iron ⓘ |
| bore | 3.72 inches ⓘ |
| camshaftLocation | cam-in-block ⓘ |
| compressionRatio | varied by year and application ⓘ |
| configuration | V8 ⓘ |
| coolingSystem | water-cooled ⓘ |
| countryOfOrigin |
United States
ⓘ
linked to:
United States of America
|
| cylinderBankAngle | 90 degrees ⓘ |
| cylinders | 8 ⓘ |
| displacement |
326 cubic inches
ⓘ
5.3 liters ⓘ |
| emissionsControl | pre-emissions-control era design ⓘ |
| era | 1960s American muscle and intermediate cars ⓘ |
| family | Pontiac V8 engine family ⓘ |
| fuelSystem |
2-barrel carburetor (base versions)
ⓘ
4-barrel carburetor (high-output versions) ⓘ |
| fuelType | gasoline ⓘ |
| headMaterial | cast iron ⓘ |
| ignitionSystem | distributor-based ⓘ |
| inductionSystem | carbureted ⓘ |
| manufacturer |
Pontiac Motor Division
ⓘ
linked to:
Pontiac
|
| marketPosition | mid-displacement V8 ⓘ |
| marketRole | step-up engine from six-cylinder and base V8 options ⓘ |
| mountingLayout | longitudinal front-engine ⓘ |
| notableApplicationType | intermediate-sized Pontiac models ⓘ |
| notedFor | balance of performance and everyday drivability ⓘ |
| oilSystem | wet sump ⓘ |
| parentCompany | General Motors ⓘ |
| performanceCategory | small- to mid-block American V8 ⓘ |
| powerOutput |
approximately 250 hp SAE gross in base form
ⓘ
up to around 285 hp SAE gross in high-output form ⓘ |
| productionEnd | 1967 ⓘ |
| productionStart | 1963 ⓘ |
| stroke | 3.75 inches ⓘ |
| successor | 350 cu in Pontiac V8 ⓘ |
| torqueOutput | approximately 340 lb-ft SAE gross (varied by version) ⓘ |
| typicalTransmissionPairing |
automatic transmission
ⓘ
manual transmission ⓘ |
| usedIn |
Pontiac Catalina (selected years and trims)
ⓘ
linked to:
Pontiac Catalina
Pontiac Firebird (early base V8 applications) ⓘ Pontiac LeMans ⓘ Pontiac Tempest ⓘ |
| valvesPerCylinder | 2 ⓘ |
| valvetrain | overhead valve ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: 326 cu in Pontiac V8 Description of subject: The 326 cu in Pontiac V8 is a mid-displacement American V8 engine produced by Pontiac in the 1960s, known for powering intermediate models like the LeMans with a balance of performance and everyday drivability.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.