fuel mileage after runni8ng hard

[nattyice08]

i've made an amazing discovery. whether you believe me or not it is up to you guys. currently i am driving a 95 ga with the 3100 v6. i just recently put a k&n cone filter on the car. my fuel mileage didnt increase or decrease, instead it just stayed the same. yet, this is not the point that im trying to get at. when i drive my car like my grandmother drives hers, i get anywhere from 17.9-18.7mpg. i got into an arguement w/my gf recently, and decided i needed to go for a drive. there wasn't a stopsign or light that i didnt leave marks at. i filled up tonight and checked my gas mileage, and it was 19.88. NO HIGHWAY TIME. i dont understand it. anyone else?

[GrandAmSSE]

Better air fuel mixture with the throttle wide open. I notice the same thing with my 95 GASE. Is yours green to?

[nattyice08]

yeah, mines green. you can check it out in the member's ride section. im going for gaotw this time around. hopefully it will pull through for me.


http://www.gaownersclub.com/forum/showthread.php?threadid=55766&perpage=20&pagenumber=1

[Bjornboy81]

I've noticed recently that if I push it hard off the line to get up to speed (within reason) then I get better milage then keeping rpms low. In between just kills milage.

[Tebore]

It's not completely unbelieveable. There's more to gas mileage than just the engine. There's also the tranny. I noticed all of you have the V6 which means auto which means a torque converter. If you get it to stall RPM and keep it around that range then you'll get optimal power transfer.

I have no idea what it is on these converters, but I noticed that from 1500-2000 RPM the engine and tranny are at optimal efficiency.

I cruised on highway at 90-100km at around 1700-1900RPM and it gets around 30mpg but when I punch it to 120-130km which uses 2300-2600RPM i get around 20mpg.

[Bjornboy81]

what's is the "stall RPM"? I've seen that before and I dont' know what that is. :)

[Tebore]

What I know it as is the speed the TC has to turn before it starts to transfer power. At 600/700 you're able to hold your brakes and there's barely anything pushing the car.

Some TCs have like 2000-3000 RPM stalls for racing, so you rev to 2000/3000 then SLAM the tranny in gear and it'll be fine. Or some engines have most of their power at the higher RPM band and you want to be sure you're allowing your engine to rev up faster and releasing that power in a burst.

The lower the stall the less the engine has to turn before you start to feel movement.

Someone correct me if i 'm wrong. I'm sure my explaination is lacking a few things.