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Fuel Mileage
I checked my fuel mileage the other day on my stock Euro 930 except for SC cams and K7200. With my "normal" in town, spirited, driving I was getting 11mpg, taking it really easy I got 12. Not much of a change for what was a drastic change in my driving habits. Is this normal or is there something that might be out of whack? The car doesn't appear to have a fuel system leak and does not emit black smoke. I don't expect to get 20mpg but at least a little better than 12mpg when taking it easy.
Pat
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10 Ford Raptor 86 930 |
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I get between 13-15 with my car. I have a full exhaust.. that's pretty much it. I noticed that when my O2 sensor was functional and connected, I got as high as 17.
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1987 930 1956 Chevy 3100 2009 Subaru Forester 2003 KX250 X2(I like my toys!!) |
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I got about 10 before my EFI project. I've never been able to take it easy in any car, so my mileage is always at the extreme low end. It'll be interesting to see what I get with EFI (if I ever get my car back
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2014 Cayman S 2011 Cayenne Turbo 1979 930 (475 rwhp at 0.95 bar) |
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Most of the guys on the 3.0 carb'd thread were quoting between 12-14 and that is with more ideal gearing, less weight and a whole lot less potential so the trade off isn't so bad.
How does she do at steady rate/highway driving?
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Luke S. 72 RS spirit 2.7mfi, 73 3.2 Hotrod on steelies, 76 993 3.3efi TT, 86 trackrat, 91 C4s widebody,02 OLA winning 6GT2, 07 997TT, 72 914 v8,03 900 rwhp 996TT |
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I got 19mpg on the hwy, but that was before my rebuild. I'm taking a trip tomorrow and plan on checking it again.
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10 Ford Raptor 86 930 |
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I get about 11,5 mpg if I get on it...and about 13 IF I stay out of the turbo. So your mileage isn't out of the average if you kee your foot your foot out of the accelerator!! Some folks seem to get better mileage, but they must be tuned more critically.
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1987 factory Slantnosed 930 Cabriolet/Guard's red 2002 Midnight Blue 996TT X50 1999 Iris Blue 996 (Dash fire burned and totalled 9/07) |
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A fellow Pelacanite
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Fit a wideband AFR meter setup, then you can see what might not be working right, if at all.
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1981 UK 930. G50/01 shortened, 964 3.8RS Fibreglass Body Kit, 18" Alloys 8.5" F & 10" R, 225's F & 285's R, Special Colour Metallic Blue Paint, FIA Sparco Evo's, A/C and Air Pump removed, Electronic Boost Controller, GHL Headers, Tial46 WG. Fitting - New service kit. Needs Fitting - Innovate XD-16 Kit, Kokeln IC. Stephen's K27 HFS, EVO Intake Assy & his Modded USA Fuel Head. 1983 UK 911 3.2 Carrera Sport Coupe. Black, Black Leather with Red Piping, Black Alloy Gear Knob, K&N Air Filter Element, Turbo Tie rods. Needs Fitting - K&N CO Sensor, Round A/F Dial Gauge, Factory Short Shift Kit. http://www.danasoft.com/sig/Iamnotanumber.jpg |
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Registered
Join Date: Dec 2005
Location: Atlanta, Georgia
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On a recent 1,000 mile trip (80% highway) I got a surprising 21 mpg with my all stock 930.
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87 930 96 BMW M3 Coupe 89 951 Peugeot moped |
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Join Date: Dec 2004
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It's a 930... who cares.
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1988 - 930 Porsche (track Car) 2002 - Panoz (track car) 2002 - 996 Porsche (weekends) 2006 - M5 BMW - (daily Driver) 2006 - F250 turbo diesel |
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As a friend of mine once said in reference to gas mileage " Velcome to the vorld of 80's zupercars"!!
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"Todd" 98 Tahoe ,2007 Saturn Vue 86 930 black and stock, 80 930 blue tracdog 91 Spec Miata (yeah I race a chick car) "life"ll kill ya" Warren Zevon |
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Lurkasaurus
Join Date: Apr 2004
Location: SK, Canada
Posts: 930
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Single digits when baggin' it around town - not quite into the teens when babying it down the highway. My mix is really fat though. Can't wait for the EFI conversion and rebuild.
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Tony '77 930 "Objects in mirror are losing" "Oh cock..." - James May |
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Wow... I bet gas mileage could easily double with efi. My 74 with a 3.6 gets about 25 - 27 mpg on average and I tend to drive in a very spirited nature. A side note is that my car only weighs 2300 pounds to so that could be a contributing factor to the good gas mileage.
I am going to be switching out the 3.6 for an efi 3.3 or 3.4 turbo I am hoping to get at least somewhere in the low 20's for fuel economy. |
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Crotchety Old Bastard
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Any 930 should be capable of 13mpg in town and 21mpg on the highway. If you are not getting those numbers get to a dyno or LM-1 and find the problem. Most likely a WUR adjustment is in order.
EFI will likely not significantly do any better as far as mileage is concerned.
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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds '78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8 |
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yah, i get around 19-21 on the highway...car is stock....the ole lady was impressed.
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78 930 84 R5 T2 04 Suby Outback "it's a mystery, wrapped in a riddle, inside an enigma" Winston Churchill. |
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Lurkasaurus
Join Date: Apr 2004
Location: SK, Canada
Posts: 930
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I think it mostly depends on your right foot. My WUR pressures are in spec(1.6C, 3.3W, 5.8S) - with ~ 3.5% CO. I use a 10% ethanol blend too - that hurts.
Geoffrey from Racetek says EFI is good for a 20-25% improvement in fuel economy.
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Tony '77 930 "Objects in mirror are losing" "Oh cock..." - James May Last edited by turbocarrera; 02-07-2007 at 11:22 AM.. |
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Crotchety Old Bastard
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I'll bet Geoffrey sells EFI systems.
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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds '78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8 |
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Quote:
![]() Me, I'm going with a Leask adjustable WUR and see how she does..
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Gary R. |
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I'm going with Brian's solution too...and am also getting the solenoid kit.
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1987 factory Slantnosed 930 Cabriolet/Guard's red 2002 Midnight Blue 996TT X50 1999 Iris Blue 996 (Dash fire burned and totalled 9/07) |
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Quote:
Don't ya love new toys? ![]()
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Gary R. |
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Join Date: May 2005
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I think sandman said his milage was a lot better after he put in the adjustable wur and got it dialed in correctly close to 20 mpg if I remember correctly
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88 turbo Guards red Targa slant nose, and yes I am a horsepower junkie, 3.4liter,7.5 to 1 JE pistons, Adjustable WUR, Imagine fuel head, 1 bar waste gate headers,allthe cis toys. Now apart to become the next EFI monster. fabbing my own intake, headers Individual throttle bodies, MS-3, pauter rods, Xtreme twin plugged heads, gt-2 evo cams cop's. 2019 Silverado 6.2L |
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