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FtMain thing is don't run wide open throttle under lean burn, the exhaust valves will get burned. Been there done that.
That's why I like lean burn tuning 4bbl carbs. The primary venturi are for driving around town and even highway driving.
The secondary venturi are the fuel dumps.
Primary gives an air fuel ratio of around 16:1. Then when you floor it the taps open and lower the air fuel to more like 13:1.
I ran my 7.4L suburban like that for at least 9 months, I pulled the head to replace a head gasket that was bad when I got it. None of the valves were burned.
The engine in destroyed had electronic fuel injection and ran lean all the time.
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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.
Last edited by oil pan 4; 06-21-2022 at 06:07 PM..
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