A/F readings, What do the experts think? Options

[Black22]

Hey all,

I've got a 1911cc motor with about 250 miles on it. KB pistons, stock cam and L-jet, with 1.8l heads modified to 2L valve sizes. Compression is 8.5:1. Running Brad Penn 20/50.

Car was recently running way rich and got VERY poor gas mileage. I hooked up with Joe Sharp, (thanks again Joe!) and he let me use his LM-1. I tried to dial my L-jet in and got pretty close. I've since purchased and installed an Innovate MTX-L AFR kit. Gauge works great! Here is my readings as of now and after MUCH tweaking this is my dilemma.

AFR stats:
Idle= 12.7
WOT= 9.7-10.2 (it will hit these readings regardless of RPM)
Decel= 14.8-15.9

Timing is set @ 7.5* @ ~900rpm with vacuum ports disconnected and plugged.

WOT seem rich still, but now my motor runs hotter. I know I'm leaning the motor out and should expect higher oil temps but I was running about 190-200 and now I'm running 210-220. I'm also running an external 72 plate oil cooler w/fan!

I've adjusted the timing to experiment, and had it at 9.5* adv. and it ran cooler at idle but the temp went back up while driving.

It seems I have some more adjustments to get it even leaner, but that's just going to raise the temps right? (IMG:style_emoticons/default/confused24.gif)

What do you guys think and what should I do (if anything) next?

[76-914]

Congratulations to you and your beautiful wife. Say, wasn't Thomas' "Hangover Run" about 9 mo's ago. (IMG:style_emoticons/default/shades.gif) Good call on ordering the CHT gage. Yes, the resulting head temp changes are read and displayed quickly but not as quick as EGT's. Have any of you guy's ever tried to set your AFR using the EGT readings on these engines?

[Black22]

Congratulations to you and your beautiful wife. Say, wasn't Thomas' "Hangover Run" about 9 mo's ago. (IMG:style_emoticons/default/shades.gif) Good call on ordering the CHT gage. Yes, the resulting head temp changes are read and displayed quickly but not as quick as EGT's.

Thanks Kent! Yes it was about 9 months ago wasn't it (IMG:style_emoticons/default/idea.gif)

Was hoping to see you at the carb clinic this weekend, but the wife will be have labor induced on the 30th! I still might try to sneak out, if I get the gauge by Thursday and get my motor tuned better on Friday. I also have chores as well.

Wish me luck!