mfg Posted March 11, 2017 Report Share Posted March 11, 2017 Increasing the Studebaker 289 V8's compression ratio to 'R1' specs (with no other factory mods considered) resulted in a............. 1) 5%.....2) 10%.....3) 15%...or...4) 20% horsepower gain. Link to comment Share on other sites More sharing options...
mfg Posted March 12, 2017 Author Report Share Posted March 12, 2017 No thoughts/guesses here? Link to comment Share on other sites More sharing options...
r1lark Posted March 12, 2017 Report Share Posted March 12, 2017 I'm going to say 10%. Link to comment Share on other sites More sharing options...
mfg Posted March 12, 2017 Author Report Share Posted March 12, 2017 5 hours ago, r1lark said: I'm going to say 10%. That's it!....You got it! Link to comment Share on other sites More sharing options...
64Avanti Posted April 26, 2017 Report Share Posted April 26, 2017 If you start with 8.5 and go to 10.25 (R1) then the gain would only about 5%. If you check at the rear wheels you might get a higher % increase as you have accounted for most of the parasitic losses. Link to comment Share on other sites More sharing options...
64studeavanti Posted April 26, 2017 Report Share Posted April 26, 2017 I will agree with 5% (or less). If you take a 225 hp 289 and bump it up 10%, you get 247.5 which is more than the R1. So basically the math does not work for 10%. Link to comment Share on other sites More sharing options...
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