mfg Posted January 2, 2022 Report Share Posted January 2, 2022 The Avanti R3 engine powering George Krem's "Plain Brown Wrapper" has produced, under controlled conditions on an engine dynamometer, approx ....?.... horsepower! 1) 375.....2) 410.....3) 440.....or.....4) 475 Link to comment Share on other sites More sharing options...
Dwight FitzSimons Posted January 2, 2022 Report Share Posted January 2, 2022 I will guess 410 HP. --Dwight Link to comment Share on other sites More sharing options...
mfg Posted January 3, 2022 Author Report Share Posted January 3, 2022 2 hours ago, Dwight FitzSimons said: I will guess 410 HP. --Dwight Close...but no cigar Dwight! Link to comment Share on other sites More sharing options...
mfg Posted January 4, 2022 Author Report Share Posted January 4, 2022 All through here? Link to comment Share on other sites More sharing options...
pantera928 Posted March 20, 2022 Report Share Posted March 20, 2022 375 Link to comment Share on other sites More sharing options...
Avanti83 Posted March 20, 2022 Report Share Posted March 20, 2022 I'll guess 440 as he probably runs higher boost than average. 300 or so hp without boost would be about 420 at 6 psi boost more or less. Link to comment Share on other sites More sharing options...
pantera928 Posted March 20, 2022 Report Share Posted March 20, 2022 One of us will be right as i do not believe it is 475 Link to comment Share on other sites More sharing options...
mfg Posted March 21, 2022 Author Report Share Posted March 21, 2022 On 3/20/2022 at 11:02 AM, pantera928 said: 375 Sorry, not 375HP Link to comment Share on other sites More sharing options...
mfg Posted March 21, 2022 Author Report Share Posted March 21, 2022 On 3/20/2022 at 11:51 AM, Avanti83 said: I'll guess 440 as he probably runs higher boost than average. 300 or so hp without boost would be about 420 at 6 psi boost more or less. 440HP is CORRECT....WOW! Link to comment Share on other sites More sharing options...
pantera928 Posted March 21, 2022 Report Share Posted March 21, 2022 53 minutes ago, mfg said: 440HP is CORRECT....WOW! Wow! THat would be impressive even by today's standards Link to comment Share on other sites More sharing options...
mfg Posted March 22, 2022 Author Report Share Posted March 22, 2022 23 hours ago, pantera928 said: Wow! THat would be impressive even by today's standards Agreed! Link to comment Share on other sites More sharing options...
VtMike Posted March 25, 2022 Report Share Posted March 25, 2022 On the issue of extra boost. I recall a statement by George Krem indicating that his R3 engine came with the high boost pulley, and that he had not made any change. Do we know at what RPM his R3 was making 440 hp? I believe the rating of 335 was at something like 5200? And I recall reading that the boost was likely to increase a good bit at higher RPMs? On the other hand, I recall also reading that Ted Harbit had strict instructions from George not to exceed 6000 rpm while racing, so he may have given the same instructions to the dyno guys? I would love to see the dyno HP of Ted's Stude Tomato. I believe he has recorded times that were very close to George's R3? Link to comment Share on other sites More sharing options...
mfg Posted March 25, 2022 Author Report Share Posted March 25, 2022 10 minutes ago, VtMike said: On the issue of extra boost. I recall a statement by George Krem indicating that his R3 engine came with the high boost pulley, and that he had not made any change. Do we know at what RPM his R3 was making 440 hp? I believe the rating of 335 was at something like 5200? And I recall reading that the boost was likely to increase a good bit at higher RPMs? On the other hand, I recall also reading that Ted Harbit had strict instructions from George not to exceed 6000 rpm while racing, so he may have given the same instructions to the dyno guys? I would love to see the dyno HP of Ted's Stude Tomato. I believe he has recorded times that were very close to George's R3? You make an interesting point...Horsepower does seem to go through the roof on supercharged engines where the driver never lifts his foot...It's been said that Granatelli used to push the R3 in 63R1025 to 7500-8000 RPM to "Beat the Hemis".... All it really takes is a big wallet, and a few spare engines sitting back at the garage!!! Link to comment Share on other sites More sharing options...
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