LPE – LT1 Engine Mods

Lingenfelder Performance Engineering

Question .. when you’re faced with a decision to stay with your tired LT1 or do a LS swap?  Which do you do ? Do you want to keep the car original and juice up the motor?  I faced the same question — If you’re thinking that at some point in time, over the next 60 years, the C4s will finally come into their own as I did – I turned to Lingenfelter Performance Engineering’s (LPE) shop in Decatur, Indiana, for one of its 383ci LT1 engine upgrade kits.  Included:

  • Engine removal, inspection and disassembly
  • JE 2618 alloy forged aluminum pistons – 10.8:1
  • Callies 4340 forged steel crankshaft – 3.750″ stroke
  • Oliver 4340 billet steel I-Beam connecting rods – 5.850″ length
  • Total Seal file fit rings, heavy duty rod & main bearings
  • Computer balanced rotating assembly
  • Lingenfelter CNC ported & polished LT1 or LT4 cylinder heads
  • Stainless steel 2.00″ intake valves
  • Stainless steel 1.56″ exhaust valves
  • Lingenfelter double valve springs, titanium retainers, 10 degree locks & seals
  • Three angle valve job, checking of spring tensions and heights
  • Lingenfelter designed Competition Cams hydraulic roller camshaft
  • Ported and polished LT1 intake manifold
  • Competition Cams High Tech stainless steel full roller rocker arms – 1.6:1 ratio
  • 58 mm aluminum throttle body
  • LPE engraved throttle body cover
  • Professional installation, testing and tuning
  • Stainless steel exhaust by Corsa
  • Lingenfelter modified air box lid and K&N air filter
  • Chassis dyno testing after installation
  • LPE’s 2 year / 24,000 mile warranty

In addition to the engine package, LPE installed a pair of ceramic-coated headers and a heavy-duty radiator with new hoses and belts.  The bottom line – Dyno tuned it turns out 440hp/435torque and 395hp at the wheels.

Now it’s your turn to make a decision ……..

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