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Mark's 1970 Corvette
Engine

 

 

Desktop Dyno Results

 

 
  • Original 1970 L46 350/350HP V-8
  • 425 HP (Estimated)
  • Balanced rotating assembly 
  • Bored +.030 w/torque plates
  • Sealed Power 11.0-1 Forged Pistons
  • Stock Forged Steel Crank
  • Stock Heavy Duty "Pink" Rods
  • Sealed Power Cast/Moly Rings
  • Clevite 77 Bearings 
  • Comp Cams XE274H Cam
    (230/236D @.050, 480/490L)
  • Comp Cams Magnum Lifters
  • Comp Cams Magnum Chromemoly Pushrods
  • Comp Cams Double Roller Timing Chain Set
  • Stock Oil Pan
  • Melling High Volume Oil Pump w/welded pickup
  • Trick Flow 23 Degree Aluminum Heads (64cc)
  • Comp Cams Magnum Roller Tip Rockers (1.52 ratio)
  • Energy Suspension Polyurethane Motor & Transmission Mounts
  • ARP 12 Point Stainless 300 Engine & Accessory Fasteners

 

 
 

Notes:

  • Considerable research was done to establish the optimal component mix for the upgraded engine.  I'm confident the result is a "best of breed" combination for the street.
  • All machine work, balancing and assembly of the short block was done by HBR Racing Engines in Hollywood, FL.  Excellent machine shop, very conscientious and honest.
  • Engine runs very strong and cool.  Pulls hard thru 6000RPM, idles @ 800 and has sufficient vacuum (12 in.) for power devices. Dyno pulls are planned soon.  The coolant temperature has never exceeded 190º in all driving conditions.  The Stewart water pump is the same high flow design used in NASCAR small-blocks. 
  • Love the new TFS heads!  Best deal on the market.  64cc chambers maintain stock compression, excellent 195cc intake volume, angle plug design to optimize burn, screw-in rocker studs and guideplates, springs support up to .500 lift cams, variable spring seat diameters allow upgrade of springs without machining, hardened exhaust valve seats for unleaded gas, all for $800.    
  • Edelbrock Performer RPM Air Gap intake requires hood scoop or alternative hood.  I chose a repro L88 from Ecklers.
  • Demon carb is state of the art, looks great and only required minor idle circuit adjustments to optimize performance and idle.
 

Copyright © 2001 Mark Smith