Tuning for mileage?

Tuning for mileage?

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Tuning for mileage? - 8/17/2009 3:45:02 PM

turfmn

Posts: 4187
Joined: 7/31/2003
From: Bethel, De
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Car: 1992 Ford LX hatchback
1/4 ET: 11.132
1/4 MPH: 127.11

Anyone ever try and tune for more mileage when they are off the track? I decided to change my sparkplugs and put in a set of Autolite 3924's gapped at .054 to see if I could pick up some gas mileage. I was running Autolite AR3924's gapped at .045. I've also started running 89 octane instead of 93. I am thinking of running 87 for the rest of the summer and switching back to 89 once the air gets cooler and denser. After the plug swap I took the car out and took it up to 6psi of boost and didn't have any problems with spark blowout.

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RE: Tuning for mileage? - 9/1/2009 8:28:58 PM

turfmn

Posts: 4187
Joined: 7/31/2003
From: Bethel, De
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Car: 1992 Ford LX hatchback
1/4 ET: 11.132
1/4 MPH: 127.11

Well, I'm getting an average of four more miles per gallon.

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RE: Tuning for mileage? - 9/1/2009 9:40:20 PM

frdfandc

Posts: 3390
Joined: 7/31/2003
From: 15 mins from the Nats
Status: offline
Car: 2003 Chevy Silverado
1/4 ET: 15.420
1/4 MPH:

I need to do something for my truck. Getting around 14mpg. Time for new plugs and probably a tune now that I'm way past warranty.

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RE: Tuning for mileage? - 9/2/2009 7:00:29 AM

turfmn

Posts: 4187
Joined: 7/31/2003
From: Bethel, De
Status: offline
Car: 1992 Ford LX hatchback
1/4 ET: 11.132
1/4 MPH: 127.11

Do you tow with your truck? If not you could try a set of those $5 plugs with fine wire electrode. Depending on mileage you may want to put in a set of O2 sensors also.

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RE: Tuning for mileage? - 9/2/2009 9:06:07 AM

1/4 horse

Posts: 1520
Joined: 10/5/2004
From: Bear, DE
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Car: 1989 Ford Mustang LX
1/4 ET: 10.782
1/4 MPH: 130.28

My truck is pretty much horrible but it was that way from the factory. I put 3923's in it the last two times because it ran a little better with them at the track. I've only ran the truck twice so maybe it's time to go back to the 3924s and see if that makes a difference. I guess a 360 with 3.92 gears on a 28 inch tall tire doesn't have much of a chance either way though. lol.

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RE: Tuning for mileage? - 9/4/2009 1:07:05 AM

frdfandc

Posts: 3390
Joined: 7/31/2003
From: 15 mins from the Nats
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Car: 2003 Chevy Silverado
1/4 ET: 15.420
1/4 MPH:

I do tow Brian, but not often. The truck just turned 80k last week. I do have a favor to call in to a friend. I'll get him to let me borrow his scanner and monitor the 02's to see how they are performing. I don't want to buy 02's just yet, just forked out a chunk of cash for brakes and a few other items.

I'm thinking of trying a set of the iridium plugs. Have heard mixed reviews about them in these trucks.

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RE: Tuning for mileage? - 9/4/2009 7:18:26 AM

turfmn

Posts: 4187
Joined: 7/31/2003
From: Bethel, De
Status: offline
Car: 1992 Ford LX hatchback
1/4 ET: 11.132
1/4 MPH: 127.11

Something else to think about. With my 02 F250 I had problems with spark knock when towing and on some extended trips. When I changed the plugs I put in plugs that were one heat range colder and the spark knock went away.

Do a little reading on those plugs. Some people say the platnium on the ground strap can cause pre-ignition under hard loads or blower applications. I don't know if it's true or not.

< Message edited by turfmn -- 9/4/2009 7:25:52 AM >

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RE: Tuning for mileage? - 9/5/2009 1:11:10 AM

frdfandc

Posts: 3390
Joined: 7/31/2003
From: 15 mins from the Nats
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Car: 2003 Chevy Silverado
1/4 ET: 15.420
1/4 MPH:

I need to replace them. They have 80k on them. I am getting a little bit of pre-ignition on hard acceleration, like when I'm merging onto 95.

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