383ci 400hp LT1 Long Block Engine

383ci 400hp LT1 Long Block Engine

Base Price $6,999

The 383/400 LT1 is an excellent performing engine package designed
for the LT1 Camaro and Firebird that won’t break the bank.

Peak Horsepower: 400bhp @ 5800rpm 
Peak Torque: 460lb/ft @ 4000rpm
Compression Ratio: 11.:1
Operating Range: 1800 – 5800rpm
Required Fuel: 91+ Octane Pump Gasoline

BLOCK SPECIFICATIONS

Block:

  • GM LT1 Cast Iron Block
  •  Decked to Match Pistons
  • Bored 4.030”
  • Honed with Torque Plates and Pressure Washed
  • New Durabond Cam Bearings Installed
  • 4Bolt Main Caps Installed, Line Bore and Hone
  • ARP Main Studs


Pistons:

  • Mahle Forged pistons with AntiFriction Coating


Bearings:

  • Clevite HSeries Main and Rod Bearings


Lifters:

  • Comp Cams Hydraulic Roller


Covers:

  • GM Factory Oil Pan
  • GM Factory LT1 Timing Cover


Gaskets:

  •  Fel Pro Head Gaskets .040”
  •  Fel Pro Performance Oil Pan, Timing Cover Gaskets


Crank:

  • Scat 9000 Series Cast Steel
  • 3.750” stroke
  • Internally Balanced Front and Rear


Rods:

  • Scat 4340 Forged IBeam
  • 6.000” length
  • ARP Rod Bolts


Rings:

  • Mahle Plasma rings


Camshaft:

  • Comp Cams Hydraulic Roller


Timing Sets:

  • GM Factory LT1 Timing Set


Oil Delivery:

  • Melling Select Performance
  • Melling Pick Up Tube Tig Welded
  • Melling HD Drive



CYLINDER HEAD SPECIFICATIONS

Type:

  • GM Aluminum LT1 Castings
  • Three Angle Performance Valve Job
  • Bowl and Slight Runner Porting


Intake Valves: 

  • Manley Stainless Steel 2.00


Exhaust Valves:

  • Manley Stainless Steel 1.56” 


Pushrods:

  • Smith Brothers 5/16 .083” Wall Hardened


Combustion Chamber:

  • 54cc Combustion Chambers


Spring Package:

  • Comp Cams Double Valve Springs
  • Comp Cams Hardened Retainers and Locks


Head Bolts:

  • ARP Performance


Rocker Arms:

  • Comp Cams Ultra Pro Magnum 1.6 ratio
  • ARP 7/16 Rocker Studs
  • Manley Hardened Guide Plates



Here at Golen Engine we build each LT1 Street engine with the same meticulous process used in our line of racing engines to ensure top quality performance and reliability throughout its lifetime.


When you purchase one of our LT1 High Performance Street Engines you will receive a full spec sheet listing the exact components your engine was built with. We will also provide you with a complete Set Up Guide as well as full phone tech support to aid you with the installation process. It is mandatory for you to contact Golen Engine Tech Support before starting your engine for the first time and you can reach our Tech Support Line at 1-800-591-9171 ext 2.   


Each Golen Engine Performance Street Engine comes standard with a “One Year No Mileage Limit Warranty” to keep you confident and covered!

We are able to custom build your engine to match just about any specs you desire and offer a long list of proven upgrades, so if you do not see it just ask us!


Feel free to contact us anytime for help choosing the perfect performance engine combination!!


Thank you,

Golen Engine