Almost there but not quite!

[Jonnylightening]

OK guys so I've been tuning my carb and still alittle confused. I'm running a 408 /904 on E85. I'm using an AEM LAMDA A/F gauge. At idle with the car in gear it's idling at 750RPM @8in vacuum. Park at idle it's at 12in. At first it was RICH at idle and light cruise. (.680-.740) I pissed with jets, IAB, IFR, PV, PVR. Got it to idle now in gear at .860-.900. When I ease on the accelerator though it goes .740-.780 and the climbs up to the mid .8××. Also when I'm cruising easily and upshift around 1500-2000RPM it leans out to .980-1.20 then mellows back out to the .860-.900. Another thing is when I come off a faster cruise upon a stop sign it leans out to 1.20-1.40. Sometimes I have to pop the throttle to keep it from stalling??? Any Ideas? I'm definitely going in the right direction just not quite happy yet. Floats, Fuel Pressue, and Timing is all in check!

 

[Garrett Ellison]

Where are you buying your e85 at? Is it standard pump (e51 to e83, depending on the time of year)?

 

[Jonnylightening]

I run Pump E85 from the same store (sheetz) I have a 15 gallon cell and fill up 2 or 3 race fuel cans usually every visit. Ran the same with both the summer and winter mix. Early spring it was $1.85....now (summer mix) its $3.09. Same results either way. It's not horrible just a brain scratcher.