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I don't know but I have gone from about a Briggs and Stratton 8.9:1 to 11:1 on my 8L build. Betting on the thin air here and maybe a little water injection to boost power and fuel economy. I know a difficult combo to achieve on an otto.
I don't care what anyone say. Welding is an education. The vast majority of people who have 4 year or higher degrees can't weld anything and wouldn't know how to safely start a cutting torch.
I'm kind of in between. I built my own DC SMAW and GTAW machines from nearly useless AC only buzz boxes and heavily modified my FCAW/GMAW machines to do what I want, adding unique featurs and gas mixtures used pretty much only by me as far as I can tell. But I'm not a full time welder.
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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