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252/260 STREET TORQUE H.F.T. Dodge/Chrysler Small Block 273–360 (1964–1991)
REDLINE CAMS – 252/260 STREET TORQUE H.F.T.
Hydraulic Flat Tappet Camshaft | Dodge/Chrysler Small Block 273–360 (1964–1991)
Unleash the hidden torque in your Mopar Small Block with the REDLINE CAMS 252/260 Street Torque H.F.T. Designed for 273, 318, 340, and 360 small block Chrysler engines (1964–1991), this camshaft delivers the low-end grunt and midrange punch that Mopar street enthusiasts demand.
Operating in the 1,500–4,250 RPM range, this cam is perfect for daily drivers, weekend cruisers, and street/strip builds that need more muscle without sacrificing drivability or vacuum for power brakes. A true Stage 1 street cam, it offers the classic lope and sound of a performance cam while maintaining the manners to cruise comfortably.
🔧 Camshaft Specifications
  • Advertised Duration: 252° / 260°
  • Duration @ .050": 206° / 212°
  • Valve Lift (with 1.5 rocker arms): .420" / .440"
  • Lobe Separation Angle (LSA): 106° standard
    • Options: 108°, 110°, 112°, 114°
  • RPM Range: 1,500 – 4,250 RPM
  • Valve Lash: .000" intake / .000" exhaust (hydraulic design – zero lash)
 
📊 LSA Options – How They Affect Performance
LSAPowerband BehaviorIdle QualityVacuum / AccessoriesBest For
106° (Standard)Hard-hitting low-end, max torque responseRough lopeLower vacuumMuscle cars, street rods wanting sound & punch
108°Strong torque, slightly smoother idleNoticeable lopeModerate vacuumStreet/strip use
110°Balanced torque & midrange powerMild lopeGood vacuumStreet performance builds
112°Broader RPM range, better top-endSmooth idleStrong vacuumDaily-driven Mopars, power brakes
114°Softest low-end, smoothest power delivery 
 
 
 
✅ Recommended Upgrades
  • Performance valve springs (rated for lift)
  • New lifters (required with flat tappet cams)
  • High-zinc (ZDDP) break-in oil & moly assembly lube
  • Dual exhaust or headers for better breathing
  • 3.23–3.73 rear gears for spirited street driving
  • Upgraded timing set & hardened pushrods
 
🚦 Best Used For
  • Classic Dodge Darts, Demons, Dusters & A-bodies
  • Mopar B- & F-bodies with 318 or 360 power
  • Street builds that need strong low-end torque
  • Daily drivers with power brakes
  • Weekend cruisers that want a classic lopey sound
 
⚡ Why Choose REDLINE CAMS?
✔ Mopar-specific lobe designs for real-world torque
✔ Wide LSA tuning options for any build style
✔ Reliable performance for street and strip
✔ Built on decades of camshaft engineering expertise
 
 

252/260 STREET TORQUE H.F.T. Dodge/Chrysler Small Block 273–360 (1964–1991)

160,00$Precio
Cantidad

  • 🛠 Installation Instructions – REDLINE CAMS Hydraulic Flat Tappet Camshaft

    Application: Dodge/Chrysler Small Block V8 (273, 318, 340, 360 – 1964–1991)

    ⚠️ Important Notes Before You Begin

    • Always use new lifters with a new flat tappet camshaft.

    • Use high-zinc break-in oil (ZDDP) and moly assembly lube.

    • Verify valve spring pressures are compatible with cam specs.

    • Always check retainer-to-seal clearance, pushrod length, and piston-to-valve clearance.

    • Recommended valve lash: .000” intake / .000” exhaust (hydraulic zero lash).

    🔧 Step-by-Step Installation

    1. Preparation

    • Disconnect battery and drain coolant.

    • Remove radiator, fan, belts, valve covers, intake manifold, timing cover, and timing set.

    • Remove distributor and mark rotor position for correct re-installation.

    • Remove old camshaft and lifters. Inspect cam bearings and journals for wear.

    2. Camshaft Installation

    • Apply assembly lube generously to cam lobes and journals.

    • Carefully slide new camshaft into block, avoiding nicks or scratches.

    • Install new camshaft thrust plate (if applicable) and torque to spec.

    3. Timing Set & Degreeing

    • Install new double-roller timing chain set.

    • Align timing marks:

      • Dot-to-Dot method (crank dot at 12 o’clock, cam dot at 6 o’clock).

    • Torque cam gear bolts to spec with thread locker.

    • If possible, degree the camshaft to verify proper installation.

    4. Lifters & Pushrods

    • Coat new hydraulic lifters with assembly lube.

    • Install lifters into their bores.

    • Insert pushrods and rocker arms.

    5. Valve Lash / Preload

    • Rotate engine to TDC firing position for #1 cylinder.

    • Adjust hydraulic lifters to zero lash (tighten rocker nut until pushrod just stops spinning freely).

    • Add 1/4–1/2 turn preload to each rocker.

    • Repeat for all cylinders following the firing order (1-8-4-3-6-5-7-2).

    6. Reassembly

    • Reinstall timing cover, intake manifold, valve covers, water pump, belts, radiator, and accessories.

    • Reinstall distributor, setting timing near initial spec (10–12° BTDC is a good starting point).

    7. Camshaft Break-In Procedure (Critical!)

    • Fill engine with high-zinc break-in oil.

    • Prime oiling system before startup.

    • Start engine and immediately hold at 2,000–2,500 RPM for 20–30 minutes.

    • Vary RPM slightly during break-in; do not let the engine idle.

    • Monitor oil pressure, coolant temp, and check for leaks.

    8. Post Break-In

    • Change oil and filter after 30 minutes.

    • Refill with high-zinc oil for the first 500 miles.

    • Recheck ignition timing and adjust as needed.

    • Verify idle vacuum and make carburetor/EFI adjustments.

    ✅ Recommended Supporting Upgrades

    • Performance valve springs matched to cam lift/duration

    • High-flow timing set

    • Hardened pushrods & steel retainers

    • Headers & free-flowing exhaust

    • Performance ignition timing (initial ~12–16° BTDC, total ~34°)

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