Cruzn620 Posted November 13, 2007 Report Share Posted November 13, 2007 alright, post up what you are driving, motor installed and your average fuel economy. the PO of my 620KC claims he got 19-20mpg out of this truck (i havent driven it enough to know what it gets yet) but i figured it got better than that. i am thinking about buying another 620 and putting a z motor in it for the FI and fuel mileage so i have a datto to drive to work in that is economical. let me know what you think Quote Link to comment
Bleach Posted November 13, 2007 Report Share Posted November 13, 2007 Hainz says poor fuel economy is a sign of wealth. I think its a sign of how rich your engine is, no you! :D lol 1978 620 Kingcab L18 Crame Cam Weber 32/36 jetted down to .30 truck 5-speed - stock 4.3 rear 27mpg average Quote Link to comment
kiznook Posted November 13, 2007 Report Share Posted November 13, 2007 72 510 LZ20 -high compression :o 32/36 5 speed (unknown origin) EI Hard to tell for sure since the speedo doesn't currently work, but I calculated the milage to canby this year, and it worked out to roughly 27mpg :cool: My KA hardbody 2wd usually gets 20-25, big tires and heavy foot hurt milage :D Quote Link to comment
hang_510 Posted November 13, 2007 Report Share Posted November 13, 2007 wagon (when it had )L20b/dogleg/DGV/lead foot- avg=25MPG 2dr w/ L-Z24 15MPG if i keep my foot out of it :fu: im rich! :lol: Quote Link to comment
]2eDeYe Posted November 13, 2007 Report Share Posted November 13, 2007 My 77 KC w/L20 got about 24mpg with a heavy right foot.... Funny, my G35 gets about the same :D Quote Link to comment
RacnJsn95 Posted November 13, 2007 Report Share Posted November 13, 2007 Last time I got gas in my 620 before it blew up I got 201.2 miles / 8.61 gallons = 23.36 mpg L20b +.030, L18 pistons, peanut head, L16 intake, and exhust manifold ,4speed, stock carb and cam. I assume its got 4.375 gears, but I have no real evidence. Quote Link to comment
Icehouse Posted November 14, 2007 Report Share Posted November 14, 2007 620 kc ka24e zx 5 speed freeway best 29mpg average work commute 27mpg mostly freeway though I think if I had a new o2 and a higher geared rear end I could get 34mpg. If anyone wants to sell me a 79 rearend feel free to PM me :D O I also used map quest to get these numbers since my speedo is off, so the numbers should be very accurate. I also let Holly drive it half way to the beach and it still got 29. She has a heavy right foot to I guess. Quote Link to comment
DatDoug Posted November 14, 2007 Report Share Posted November 14, 2007 73 Dime 2-door Stock L20 with W53 head Weber 32/36 downdraft 27 hwy 24 town 77 KC Stock L20 with U67 head Weber 32/36 DownDraft Dont know yet. Just starting to calculate! Quote Link to comment
datsun dreamer Posted November 14, 2007 Report Share Posted November 14, 2007 '74 620 Weber 32/36 3:70 R.E. Gear L18...4Speed=24MPG AVG. It's all good:D:D:D!!!!!! Quote Link to comment
datzenmike Posted November 14, 2007 Report Share Posted November 14, 2007 BC to Ontario and back two summers ago. 3,400 lb '78 KC, 4:11s and 12.5X33s, L20B with 300,000 plus Kms, Hitachi carb :D. Every fill up was over 21 MPG but could not quite get it to 25. With 4:11s and 33s it may have been going further than the odometer said. :lol: Quote Link to comment
Cruzn620 Posted November 14, 2007 Author Report Share Posted November 14, 2007 thanks for the info guys. looks like a well tuned L20 carbed will do just as well as a Z motor. i have been in and out of my L20 motor enough now that i'm not scared to work on it at all! parts are cheap too! i guess i'm going to start scouring for another 620 for my "work truck". i might have to make a trip out west? LOL Quote Link to comment
]2eDeYe Posted November 14, 2007 Report Share Posted November 14, 2007 BC to Ontario and back two summers ago. 3,400 lb '78 KC, 4:11s and 12.5X33s, L20B with 300,000 plus Kms, Hitachi carb :D. Every fill up was over 21 MPG but could not quite get it to 25. With 4:11s and 33s it may have been going further than the odometer said. :lol: Doesn't count your in Canada...metric and standard don't mix :lol: Quote Link to comment
datsunaholic Posted November 14, 2007 Report Share Posted November 14, 2007 '76 King Cab L18 (not original, of course) Weber 32/36 DGEV (jetted for a 1400cc B210, no kidding) Stock 4.375 rears, running 205/75R14 tires in back '82 280ZX transmission (big overdrive) 32 MPG average, commute traffic (50 miles each way). My '78 4X4 with a DFAV and truck 5-speed gets about 25MPG. Quote Link to comment
Bleach Posted November 14, 2007 Report Share Posted November 14, 2007 2eDeYe;27800']My 77 KC w/L20 got about 24mpg with a heavy right foot.... Funny' date=' my G35 gets about the same :D[/quote'] crap! According to the onboard computer, most of the time I'm averaging 19mpg in the Z :rolleyes: Any highway driving and I get 26-29 on the highway. Icehouse, what's the onboard computer in your Datsun say for your miles per gallon?! :D Quote Link to comment
71-521 Posted November 14, 2007 Report Share Posted November 14, 2007 2 years ago I averaged about 24/28 on a used l16 from bre620 with a weber can't tell ya now as it has fuel/speedo issues..s. Quote Link to comment
datzenmike Posted November 15, 2007 Report Share Posted November 15, 2007 2eDeYe;27857'']Doesn't count your in Canada...metric and standard don't mix :lol: I converted to miles and Imperial gallons. When Canada had a Gallon it was equal to 1.2 US. A couple of provinces had a 10km stretch of highway marked in Kms. I set my odometer and found it was 8% out with the 33s on. 22 or 23 MPG sounds about right for that weight of vehicle. The first few trips I made (much lighter)the lowest I got was 25 , and averaged 27-28.:mellow: Quote Link to comment
spiffinspudater Posted November 15, 2007 Report Share Posted November 15, 2007 My truck got about 20mpg freeway with a VERY badly tuned engine. My new Honda gets 26 with a heavy foot:D Quote Link to comment
]2eDeYe Posted November 15, 2007 Report Share Posted November 15, 2007 I converted to miles and Imperial gallons. When Canada had a Gallon it was equal to 1.2 US. A couple of provinces had a 10km stretch of highway marked in Kms. I set my odometer and found it was 8% out with the 33s on. 22 or 23 MPG sounds about right for that weight of vehicle. The first few trips I made (much lighter)the lowest I got was 25 , and averaged 27-28.:mellow: I was just playin Mike :D crap! According to the onboard computer, most of the time I'm averaging 19mpg in the Z :rolleyes:Any highway driving and I get 26-29 on the highway. Icehouse, what's the onboard computer in your Datsun say for your miles per gallon?! :D Your onboard gives you mileage? Interesting.....I've just been doing the math. Most of my miles are on the freeway commuting, in-town might be a bit different. Quote Link to comment
pope_face Posted November 21, 2007 Report Share Posted November 21, 2007 '91 Ford Explorer 4x4 4.0 V6 four-speed automatic 3.75 final drive ratio w/ 235/75R15's 4500+ lbs including me and the usual stuff I carry in it I use anywhere from 11.5 - 20.5 L/100 km... so 20.5 - 11.5 mpg... Wierd... I just noticed that the two values are flips of each other... 11.5 L/100 km = 20.5 mpg; 20.5 L/100 km = 11.5 mpg... I figure it out by resetting the trip odometer every time I fill the tank... I take the # of litres added, and divide it by the number of km travelled, then multiply by 100... I figure it gets me a pretty accurate number... The truck's way out of tune though, I think I've got valve tick, and this is between city and highway driving... I used to really lay into the throttle too, but I've mellowed out with driving a lot... averaging about 15-17 L/100 km... Quote Link to comment
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