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02-13-2003, 12:08 AM
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#1 |
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Senior Member
 
Join Date: Apr 2001
Location: Alexandria, MN
Posts: 1,462
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better gas milage???
to get a little better milage should i advance or retard my timing... it is my driver... a 250 inline six, with HEI.. everything is set to factory settings... 8deg BTDC and idle at 850 rpm in neutral....
thanks --mike
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63 C20 2WD, 230/SM420/4.11 73K 68 C30 dump truck, 327,SM425,4.56 66K original 68 C10 2WD SWB Stepper, 250/3-tree/3.73 66K.... Wifes 68 Buick Skylark Custom Conv., 350/TH400/2.56 In our family since '79 69 GMC 1500 SWB 2WD, 350/TH350/3.73 posi... 70 K10 SWB 4X4 4-sp,ps, pb, tilt, buckets, console, sliding back window (Need AC parts) WIP 72 Chevy K20 4x4 350/350/205/4.56 donor 72 Vette 350/M21/3.70 posi, triple black and super fast 84 Olds Cutlass Brougham 350/2004r/4.11 was Dad's |
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02-13-2003, 12:20 AM
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#2 |
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Fabricate till you "puke"
Join Date: Jun 2002
Location: Ill
Posts: 9,402
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you could try advancing it about 2 degrees.....if it doesnt have spark rattle, try 2 more. Then go pull a few hills under a good load, to check for spark rattle. Good luck, crazyL
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69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears.... |
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02-13-2003, 03:06 AM
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#3 |
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Registered User
Join Date: Sep 2001
Location: Hacienda Heights, California USA
Posts: 474
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What kind of gas milage are you getting now?
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'72 GMC custom camper 350/350 |
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02-13-2003, 11:40 AM
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#4 |
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Senior Member
Join Date: Apr 2001
Location: Alexandria, MN
Posts: 1,462
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im getting about 14-16 on the highway with 3.73 gears and 30.5 tires and i just think i should be a little better... so in other words the most advance i can get w/o detonation the better milage ill get???? thanks again fellas and ladies...
--mike
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63 C20 2WD, 230/SM420/4.11 73K 68 C30 dump truck, 327,SM425,4.56 66K original 68 C10 2WD SWB Stepper, 250/3-tree/3.73 66K.... Wifes 68 Buick Skylark Custom Conv., 350/TH400/2.56 In our family since '79 69 GMC 1500 SWB 2WD, 350/TH350/3.73 posi... 70 K10 SWB 4X4 4-sp,ps, pb, tilt, buckets, console, sliding back window (Need AC parts) WIP 72 Chevy K20 4x4 350/350/205/4.56 donor 72 Vette 350/M21/3.70 posi, triple black and super fast 84 Olds Cutlass Brougham 350/2004r/4.11 was Dad's |
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02-13-2003, 11:43 AM
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#5 |
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Fabricate till you "puke"
Join Date: Jun 2002
Location: Ill
Posts: 9,402
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yes, the most you can advance ......without detonation should give the best perf/milage. Good luck,crazyL
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69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears.... |
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02-13-2003, 02:03 PM
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#6 |
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Senior Member
Join Date: Apr 2001
Location: Alexandria, MN
Posts: 1,462
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sweet, thanks.. ill give it a try... ALTHOUGH I do haveta watch it cuz this thing does still hafta start at 15 below!!! thanks crazy....
--Mike
__________________
63 C20 2WD, 230/SM420/4.11 73K 68 C30 dump truck, 327,SM425,4.56 66K original 68 C10 2WD SWB Stepper, 250/3-tree/3.73 66K.... Wifes 68 Buick Skylark Custom Conv., 350/TH400/2.56 In our family since '79 69 GMC 1500 SWB 2WD, 350/TH350/3.73 posi... 70 K10 SWB 4X4 4-sp,ps, pb, tilt, buckets, console, sliding back window (Need AC parts) WIP 72 Chevy K20 4x4 350/350/205/4.56 donor 72 Vette 350/M21/3.70 posi, triple black and super fast 84 Olds Cutlass Brougham 350/2004r/4.11 was Dad's |
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02-13-2003, 02:36 PM
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#7 |
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Registered User
Join Date: Aug 2002
Location: Waxahachie TX
Posts: 773
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got gas???
man what are you cryin about dude? i wish i could get half that and gas is 1.60 a gallon here you gota a o/d tranny?that would help s butt load...Steve
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02-13-2003, 04:01 PM
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#8 |
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Senior Member
Join Date: Apr 2001
Location: Alexandria, MN
Posts: 1,462
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hahahahha... gas i a buck 85 up here in MN... and its s*** ethanol based... oh well... steve do you have a six??? and i do have my eye on a 5 speed outta an 89 half ton, but as always, what i have works and funds are the prollem...
--mike
__________________
63 C20 2WD, 230/SM420/4.11 73K 68 C30 dump truck, 327,SM425,4.56 66K original 68 C10 2WD SWB Stepper, 250/3-tree/3.73 66K.... Wifes 68 Buick Skylark Custom Conv., 350/TH400/2.56 In our family since '79 69 GMC 1500 SWB 2WD, 350/TH350/3.73 posi... 70 K10 SWB 4X4 4-sp,ps, pb, tilt, buckets, console, sliding back window (Need AC parts) WIP 72 Chevy K20 4x4 350/350/205/4.56 donor 72 Vette 350/M21/3.70 posi, triple black and super fast 84 Olds Cutlass Brougham 350/2004r/4.11 was Dad's |
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02-13-2003, 04:06 PM
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#9 |
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Registered User
Join Date: Jan 2002
Location: cornville, maine
Posts: 659
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Near bakersfield CA, this morning I saw gas at $2.06 for the cheap stuff, $2.23 for the high test.
To be fair, the cheapest I saw away from the interstate was $1.71. Ouch.
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jku Cornville, Maine 68 C10 burb 42 Willys MB 46 Dodge WF-32 1.5 ton 53 & 56 Olds' 60 Cadillac 22 Dodge Brothers |
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02-14-2003, 03:00 AM
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#10 |
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Registered User
Join Date: Sep 2001
Location: Hacienda Heights, California USA
Posts: 474
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Unless you are using an overdrive, I dought that you will increase your milage. Are you running a stick or auto tranny?
jku72. Gas is always high near Bakersfield along highway 99. Especially when you are getting close to the grapevine. Guess all those oil fields don't mean much at the gas pumps. 
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'72 GMC custom camper 350/350 |
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02-14-2003, 09:49 AM
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#11 |
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Fabricate till you "puke"
Join Date: Jun 2002
Location: Ill
Posts: 9,402
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Last glance at the pump showed premium @ $1.78 here in Illinois. At 8 mpg, im glad I dont drive that longhorn every day! crazyL
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69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears.... |
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