---
title: PS502CT Series
description: GM Big Block Compatible 502 c.i. Pro Series Engine - 627 Horsepower
---

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# PS502CT Series

## Horsepower & Torque: 627 Horsepower / 569 ft. lbs. Torque Cylinder Heads: BluePrint Engines Aluminum Cylinder Heads Compression Ratio: 10.1:1 Camshaft: Hydraulic Roller Cam - .647 Intake / .647 Exhaust Lift and 248 Intake / 254 Exhaust Duration @.050-112° LSA Pistons: Forged Crankshaft: Steel Crank - 4.000" Stroke and Forged 6.385" Rods Fuel Recommendation: 91+ Octane

#### Description:

- Horsepower & Torque: 627 Horsepower / 569 ft. lbs. Torque
- Compression Ratio: 10.1:1
- BluePrint Engines Aluminum Heads
- BluePrint Engines Hydraulic Roller Cam
- BluePrint Engines Forged Crank
- BluePrint Engines Forged Pistons

#### Block:

- BluePrint High Strength Cast Iron Block
- Manufactured and Machined in the USA!
- Mech Fuel Pump Provision: Yes
- 1-Piece Rear Main Seal
- Standard Deck
- 4-Bolt Main
- 4.466" Bore

#### Rotating Assembly:

- BluePrint Forged Crankshaft
- 4.000" Stroke
- Forged H-beam 6.385" Connecting Rods
- Forged Pistons
- Internally Balanced Front and Rear

#### Cylinder Heads:

- BluePrint Aluminum Cylinder Heads -[PS8013](https://blueprintengines.com/products/bb-chevy-aluminum-cylinder-head-316cc-assembled-ps8013)
- 119cc Chamber
- 2.30" Intake / 1.88" Exhaust Valves
- 316cc Intake / 124cc Exhaust Runners
- Cylinder Heads Feature a .300 in. Raised Exhaust Port vs an OEM Casting
- Must Verify Header / Exhaust Clearance

#### Cam Specs:

- Hydraulic Roller
- .647 Intake / .647 Exhaust Lift
- 248 Intake / 254 Exhaust Duration
- @ .050-112 Degree Lobe Separation

#### Also Includes:

- Harmonic Balancer - [BPP454I](https://blueprintengines.com/products/chevy-big-block-harmonic-balancer-internally-balanced-bpp454i?_pos=1&_psq=BPP454I&_ss=e&_v=1.0)
- Timing Cover
- Valve Covers
- Oil Pan

#### Notes:

- Not for use in pollution-controlled vehicles

<https://www.p65warnings.ca.gov/>

Engine Accessory Specifications

*Your BluePrint engine was dyno tested with the parts and specifications listed below.  If you prefer to install a different part, your engine may not produce the horsepower recorded on your dyno sheet.* 

**Part Number:** PS502CT

**Fuel Delivery Type:** Carbureted

**Spark Plug:** [BPP7938 NGK 7938 BKR5E](https://blueprintengines.com/products/bpp7938-ngk-7938-bkr5e-spark-plugs-set-of-8)(.750-inch reach, 14mm thread, 5/8 hex, plug)

**Spark Plug Gap:** .035"

**Harmonic Balancer:** Non-Weighted

**Flexplate/Flywheel:** Non-Weighted

**Stall Converter:** 2200+

**Intake Manifold:** Single Plane, Satin Aluminum

**Fuel Recommendation:** 91+ Octane

**Timing (Initial/Total Advance):** Initial Timing - 10-16° and Total Timing 32-34°

**Firing Order:** 1,8,4,3,6,5,7,2

**Recommended Break in Oil:** [**BPP710 (Click Here)**](https://blueprintengines.com/products/blueprint-engines-crate-engine-break-in-oil-1-quart-bpp710)

**Recommended Service Oil:** [**BPP10W30 (Click Here)**](https://blueprintengines.com/products/blueprint-engines-10w30-engine-oil-1-quart-bpp10w30)

**Recommended Oil Filter:** [**BPP51061 (Click Here)**](https://blueprintengines.com/products/sbc-bbc-oil-filter-bpp51061)

**Total Oil Capacity with Production Oil Pan, and Filter**: 8 Quarts

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