Kaneman

iTrader: (5)

What is the optimal AFR for cold start.

Kane

Frost

iTrader: (45)

There is no fixed value as it varies with both different setups and different intake and engine coolant temps. Look at a stock OL fuel table and see what the OEMs went with for our stock engines.

Kaneman

iTrader: (5)

Ok for a big cam car like 251-259 114lsa 90mm TB fast intake what do you think the AFR should be for an easy cold start?

Kane

Gh0st

iTrader: (3)

Why don't you listen to Frost instead of completely ignoring his comment?

edcmat-l1

iTrader: (10)

It won't need near as much fuel as in the stock OL tables that's for sure.

Don't gt fixated on an A/F ratio, as when it's cold the wideband is going to be erroneous anyways.

First thing, is make sure the VE and/or MAF are dialed in well. If there's too much fuel there, you're going to be way too rich on start up.