Chevy 305 engine

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(Design considerations: clarification)
m (Overview: changed 350 to 305 in the first line)
 
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==Design considerations==
 
==Design considerations==
The 305 engine is much-maligned and shunned as a performance build, mainly due to its small bore diameter of 3.736" which limits breathing. Limited breathing capability will limit naturally-aspirated power potential. The primary appeal of the 305 may be due to its "underdog" appeal, or its low cost, or maybe because that's what is on hand at the time. Unless you already have a pre-'87 block, the '87-up block is preferred because of the one piece rear main seal, and the cast-in provisions for the factory hydraulic roller lifters and thrust plate for the cam (although not all blocks were provisioned for a hydraulic cam, most were). Also, these later blocks tend to display less bore wear from carb-related fuel washing of the cylinders, because most were EFI.
+
The 305 engine is much-maligned and shunned as a performance build, mainly due to its small bore diameter of 3.736" which limits breathing. Limited breathing limits naturally aspirated power potential. The primary appeal of the 305 may be due to its "underdog" appeal, or its low cost, or maybe because that's what is on hand at the time. Unless you already have a pre-'87 block, the '87-up block is preferred because of the one piece rear main seal, and the cast-in provisions for the factory hydraulic roller lifters and thrust plate for the cam (although not all blocks were provisioned for a hydraulic cam, most were). Also, these later blocks tend to display less bore wear from carb-related fuel washing of the cylinders, because most were EFI.  
  
 
==Cylinder heads==
 
==Cylinder heads==
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===Aftermarket 305 heads===  
 
===Aftermarket 305 heads===  
*[http://www.trickflow.com/egnsearch.asp?N=400098+4294925232+340107+115+4294840138&autoview=sku Trick Flow Specialties Super 23], 175cc intake port, 56cc combustion chambers, 1.94" x 1.5" exhaust valves
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*[http://www.trickflow.com/search.asp?N=400098+4294952110+4294934453+115+4294952012&autoview=sku Trick Flow Super 23 175 cylinder heads], 175cc intake port, 56cc nominal combustion chamber volume, 1.94" intake x 1.5" exhaust valves
 
*World SR Torquer 305 (discontinued)
 
*World SR Torquer 305 (discontinued)
  

Latest revision as of 12:30, 3 July 2016

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