mfg Posted April 10, 2022 Report Share Posted April 10, 2022 (edited) The base 5.7 liter engine, which came standard in the 2001 Avanti, was factory rated at ......?..... horsepower. 1) 265......2) 305.......3) 340.....or 4) 370 Edited April 10, 2022 by mfg Spelling! Link to comment Share on other sites More sharing options...
pantera928 Posted April 10, 2022 Report Share Posted April 10, 2022 5 hours ago, mfg said: The base 5.7 liter engine, which came standard in the 2001 Avanti, was factory rated at ......?..... horsepower. 1) 265......2) 305.......3) 340.....or 4) 370 Well, I was always told 320 so rather than go with none of the above, I will say 340. Link to comment Share on other sites More sharing options...
mfg Posted April 10, 2022 Author Report Share Posted April 10, 2022 43 minutes ago, pantera928 said: Well, I was always told 320 so rather than go with none of the above, I will say 340. No, it wasn't 340HP Link to comment Share on other sites More sharing options...
pantera928 Posted April 10, 2022 Report Share Posted April 10, 2022 well then 305. I have spec sheets that show otherwise Link to comment Share on other sites More sharing options...
Gunslinger Posted April 10, 2022 Report Share Posted April 10, 2022 It was 305 but it didn’t take much to bump the power up noticeably. Link to comment Share on other sites More sharing options...
pantera928 Posted April 10, 2022 Report Share Posted April 10, 2022 1 hour ago, Gunslinger said: It was 305 but it didn’t take much to bump the power up noticeably. It shouldn't as that is a Chevy 350 and A lot of power can be gotten out of it easily unless it is an L-48 like the late 70s-1980 Avanti's Link to comment Share on other sites More sharing options...
Gunslinger Posted April 11, 2022 Report Share Posted April 11, 2022 The 2001-2004 Avantis didn’t use the older Chevy small block…they used the LS-1 which is actually about 347 cubic inches. Reprogram the computer…change the mass airflow sensor…add a cold air induction kit and you’ve got a engine that acts nice and tame until you give it throttle…all without a lot of financial investment or doing anything substantive or irreversible to the engine. Link to comment Share on other sites More sharing options...
pantera928 Posted April 11, 2022 Report Share Posted April 11, 2022 39 minutes ago, Gunslinger said: The 2001-2004 Avantis didn’t use the older Chevy small block…they used the LS-1 which is actually about 347 cubic inches. Reprogram the computer…change the mass airflow sensor…add a cold air induction kit and you’ve got a engine that acts nice and tame until you give it throttle…all without a lot of financial investment or doing anything substantive or irreversible to the engine. I like the LS-1. Wish my 1980 had that engine with a 200-4R Link to comment Share on other sites More sharing options...
mfg Posted April 11, 2022 Author Report Share Posted April 11, 2022 4 hours ago, pantera928 said: well then 305. I have spec sheets that show otherwise 3 hours ago, Gunslinger said: It was 305 but it didn’t take much to bump the power up noticeably. You gents are both CORRECT! Link to comment Share on other sites More sharing options...
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