mfg Posted January 5, 2019 Report Share Posted January 5, 2019 In 1964, studebaker recommended that any of their passenger cars equipped with R3 or R4 engines be operated at RPM ranges not exceeding......?..... for the first 1000 miles. 1) No limit up to red line.......2) 5000......3) 5500....or.....6000 Link to comment Share on other sites More sharing options...
r1lark Posted January 5, 2019 Report Share Posted January 5, 2019 Paxton broke the R3/R4 engines in on a dyno, so I'll say no limit up to the red line. Link to comment Share on other sites More sharing options...
mfg Posted January 5, 2019 Author Report Share Posted January 5, 2019 2 hours ago, r1lark said: Paxton broke the R3/R4 engines in on a dyno, so I'll say no limit up to the red line. CORRECT...Answer is #1! Link to comment Share on other sites More sharing options...
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