A/F ratio ?

[Fomoco98]

Would anybody know what to change in a Tweecer Cal. to lean out a 4.6? I have taken off the cats and it runs a little rich . Any help would be nice , Thanks.

 

[jstreet0204]

First before you change anything, do you know for sure you are running rich? Gas smell is common with no cats and most people assume they are running rich because of it. I wouldn't reccommend drastic a/f changes without runing a wideband.

With that said, there are several ways to change a/f, but the best way to go to the stabalzed open loop fuel table. The stock values across the top row (which is 100% load or WOT) are 12.5 and 12.0 These are the commanded a/f ratio values. You can change the top row to 13 across the rpm range if you are n/a.

 

[Fomoco98]

I have a LM1 coming I just want to be ready. Thanks for the info.

 

[Fomoco98]

I checked my No,s across the top and are as follow 13.158, 13.158, 13.158, 13.158, 12.128, 12.128, 11.213, 11.213, 10.562, 10.069.

 

[jstreet0204]

I checked my No,s across the top and are as follow 13.158, 13.158, 13.158, 13.158, 12.128, 12.128, 11.213, 11.213, 10.562, 10.069.

do a read from eec and see what they are?

 

[Fomoco98]

Yea that is the stock setup in W3Z2 ECC IV. I put a mark VIII 32V in a 98 V6. I suppose I should have included that.

 

[jstreet0204]

yeh, that will make it rich for sure. There is probably a good bit of power to be found in your tune.

 

[Fomoco98]

The only thing I have messsd with is the 4R70W Trans and had alot of fun with that.I cant wait to get my LM1 WB to start getin serious.