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Old 05-14-2011, 07:48 PM   #11
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Cool Intake

I currently do not have an K&N but did put on a Trueflow Intake with an Magnaflow catback....she sounds nice...just get 6 pulling and 12 to 13 unhooked...3:73 rear end, she will pull a house of a foundation but just can't pass a gas station!!
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Old 05-14-2011, 08:24 PM   #12
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Pulling our 314...my Burb get 6mpg...that big block is thirsty...any ideas how improve that??

CG
Is that the 6.0 liter engine? 6mpg, wow you can see the gas gauge move!
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Old 05-14-2011, 08:34 PM   #13
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Well I quess you have tryed air and muffler. How about these tips.

Keep your engine tuned up. Incorrect fuel ratio, bad spark plugs and incorrect spark timing can have a big effect on gas mileage.

Don't use your air conditioner (A/C) unless you really need it. The A/C compressor puts an extra strain on the engine.

Make sure your tires are properly inflated. Under inflated tires cause more resistance to travel.

Avoid stop and go traffic by taking alternative routes or less congested travel times.

Use a good engine oil, preferably a synthetic or standard oil treated with a friction reducing oil additive. These have been known to improve fuel economy by as much as 12%.

Use your cruise control whenever possible.

Keeping your highway speed at 55 mph can improve you gas mileage by as much as 25%, compared to 65 mph.

Avoid trying to increase speed while climbing a hill, your engine is already working hard trying to overcome gravity.

Keep your windows closed when possible. Open windows actually reduce gas mileage
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Old 05-15-2011, 06:36 AM   #14
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I believe that, that is the nature of a big block. Big engine = lot's of gas
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Old 05-15-2011, 08:53 AM   #15
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I agree with Hammer...its the price I pay to have a big gasser...I just can't justify the cost of the diesel (I wouldn't use it much for 7 months) and no one really makes a gasser in that class anymore...(I had a Ford salesman when looking at Excursions tell me that the 8.1 is a brute, the 6.8 V-10 not quite as stout, no replacement for displacement I guess). So I guess I keep the old girl running!
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2003 Suburban 2500 (8.1L)
True Flow Intake
Magnaflow Catback
Curt XD Class 5
2012 Jayco Eagle 314 BDS Super Lite
Atwood Heavy Duty 3500 Tongue Jack
12K Eq-ua-lizer
:)
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Old 05-15-2011, 07:15 PM   #16
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Is that the 6.0 liter engine? 6mpg, wow you can see the gas gauge move!
No, 'Chris' is referring to his 8.1L big block gasser.

As I recall 7.5 MPG was the worse my 6.0L gave me with a combined TV/TT loaded weight of 14,700lbs., but I was also wrestling a nasty head wind.

Bob
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Old 05-15-2011, 07:23 PM   #17
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No, 'Chris' is referring to his 8.1L big block gasser.

As I recall 7.5 MPG was the worse my 6.0L gave me with a combined TV/TT loaded weight of 14,700lbs., but I was also wrestling a nasty head wind.

Bob
I see is that a V10 or the old 454? I once drove a 6 wheel 1 ton crabtruck, late 70`s model, with a body, loaded with crabs against a strong headwind. It had the 454 in it. That was the fastest I ever saw a tank of gas disappear.
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Old 05-15-2011, 07:27 PM   #18
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GM went from the 454 V-8 to the 496 V-8 gasser...I had a 454 in a 98 3/4 burb...torquey, not like this one though! Both were hard on fuel...big trailers require big iron!
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2003 Suburban 2500 (8.1L)
True Flow Intake
Magnaflow Catback
Curt XD Class 5
2012 Jayco Eagle 314 BDS Super Lite
Atwood Heavy Duty 3500 Tongue Jack
12K Eq-ua-lizer
:)
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Old 05-15-2011, 07:34 PM   #19
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GM went from the 454 V-8 to the 496 V-8 gasser...I had a 454 in a 98 3/4 burb...torquey, not like this one though! Both were hard on fuel...big trailers require big iron!
Wow I`m behind the knowledge curve on the big GM engines! I guess Dodge and Ford make the V10`s.
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Old 05-16-2011, 12:57 PM   #20
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ONE WORD... BULLYDOG.... get their power programer for you vehicle/engine you will see results.. that is if you can keep your foot out of it....
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