nicke

Made a pull in my 65 impala to see what baseline numbers would look like.

Stock L92 6.2L (Stock cam, stock bottom end)
Stock Truck Intake
4L80E
Stock Converter
Stock LS3 Exhaust Manifolds
2 1/2" exhaust with H pipe
3800lb+ car
3.73 gears
29" rear tire diameter

The pull was 3rd gear locked up, and the sheet shows where the o2 sensor was pulled, and a wideband put in. (Ran in closed loop). The guy said it was a bit rich. What are your thoughts on this?











-Nick

1989GTA

It is rich from roughly 3800 rpm and higher. You need a tune. You will also gain in horsepower. One more thing, it looks lean lower than 3500 rpm.

nicke

Thanks, yea, I'll be putting on long tube headers and then getting a tune. It would be interesting to see what the headers would do to the afr. Probably make the 3800+ range way too rich, wouldn't you think?

-Nick