If the blm is at around 135ish in park and 130 in drive would any damage be caused. I was thinking that running a little lean with no load(in park) would not damage the engine at all. And would there be other times that one would want the blm to be a little lean??
Just curious to see what everyone thinks.


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355 10:1 , AFR 190 heads, LT4 HOT cam w/ 1.6 roller rockers, complete Superram intake, 58mm BBK TB, 24# injectors, screens out of MAF, MAT relocated, March underdrive pulleys, Streetdampner, Crane HI-6 ignition, 160 thermostat, K&Ns, TES headers(Jet hot coated), Mufflex 4' cat back, B&M shift Kit, 2500 converter, and 3.27s.

 

It's not **lean**, it's taking a correction of enrichment to get to 14.7 is all.

Ideally you MIGHT want 128 but some engines for drivibility might like other then 128.

 

I meant when you first start when it is in open loop.

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355 10:1 , AFR 190 heads, LT4 HOT cam w/ 1.6 roller rockers, complete Superram intake, 58mm BBK TB, 24# injectors, screens out of MAF, MAT relocated, March underdrive pulleys, Streetdampner, Crane HI-6 ignition, 160 thermostat, K&Ns, TES headers(Jet hot coated), Mufflex 4' cat back, B&M shift Kit, 2500 converter, and 3.27s.

 

How are you determining a lean condition? What are your spark plugs telling you? You dont sound lean to me, 130 is a normal range that means the computer is not having to adjust much from whatever the programmed value is. At idle, my blm is 147, meaning mine is a lot leaner, and it is having to add more fuel to compensate.

 

You'll have a miss if the ECM isn't compensating for the lean mixture.

Paul