mfg Posted July 16, 2018 Report Share Posted July 16, 2018 In 1975, Avanti Motors rated the 400 CI GM engine it was then using at ......?..... horsepower. 1) 175.......2) 195......3) 225....or....4) 245 Link to comment Share on other sites More sharing options...
studegary Posted July 16, 2018 Report Share Posted July 16, 2018 1 hour ago, mfg said: In 1975, Avanti Motors rated the 400 CI GM engine it was then using at ......?..... horsepower. 1) 175.......2) 195......3) 225....or....4) 245 In 1970, the 400 cid was 245 HP. With mid-70s pollution controls and going from gross to net HP figures, I will guess 2) 195 HP. Link to comment Share on other sites More sharing options...
mfg Posted July 17, 2018 Author Report Share Posted July 17, 2018 22 hours ago, studegary said: In 1970, the 400 cid was 245 HP. With mid-70s pollution controls and going from gross to net HP figures, I will guess 2) 195 HP. Sorry, #2 isn't the answer here! Link to comment Share on other sites More sharing options...
arkus Posted July 17, 2018 Report Share Posted July 17, 2018 i think they were fairly gutless so i'll say #1 Link to comment Share on other sites More sharing options...
mfg Posted July 17, 2018 Author Report Share Posted July 17, 2018 9 hours ago, arkus said: i think they were fairly gutless so i'll say #1 You got it! Link to comment Share on other sites More sharing options...
plwindish Posted October 30, 2018 Report Share Posted October 30, 2018 IMG_2815.pdf In 76, the 400's were rated at 175 hp, but they can be coaxed to have a lot more hp and torque. Here's the report of my 76's hp and torque before it went back into the car. 471.5 hp @ 5400 and 522 torque @4400 rpms. Link to comment Share on other sites More sharing options...
Gunslinger Posted October 30, 2018 Report Share Posted October 30, 2018 A 400 SBC can definitely be turned into a torque monster but not as it came from the factory. Part of the problem was the era it was used...during the dark early times of emission controls when there was little technology to do so...it was all at the expense of performance and economy and drivability. Link to comment Share on other sites More sharing options...
mfg Posted October 30, 2018 Author Report Share Posted October 30, 2018 2 hours ago, plwindish said: IMG_2815.pdf In 76, the 400's were rated at 175 hp, but they can be coaxed to have a lot more hp and torque. Here's the report of my 76's hp and torque before it went back into the car. 471.5 hp @ 5400 and 522 torque @4400 rpms. WOW! Link to comment Share on other sites More sharing options...
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