devil280Z Posted October 24, 2013 Share Posted October 24, 2013 Hey guys, I got into an argument with a co-worker about gas mileage the other day. I told him with a 1j vvti In a light 240 body I could easily get high 20's for MPG. He swears that ill be lucky to get 22 MPG. So this brings me to my question, what gas mileage are you guys getting with your swaps? Driving conservatively or even like a bat outta hell..... Let me know so I can win some money off this guy! lol Quote Link to comment Share on other sites More sharing options...
pat1 Posted October 24, 2013 Share Posted October 24, 2013 My 1jz gets 16 mpg if I'm lucky. Toyota JZ motors suck down fuel. Quote Link to comment Share on other sites More sharing options...
devil280Z Posted October 24, 2013 Author Share Posted October 24, 2013 No shit. Well I guess that's how they make great numbers on the dyno. Quote Link to comment Share on other sites More sharing options...
devil280Z Posted October 26, 2013 Author Share Posted October 26, 2013 Anyone else have input on this? Curious what others have to say. Also Pat1 do you drive around like a bat outta hell or somewhat conservative? do you have a non vvti, and what upgrades do you have? Quote Link to comment Share on other sites More sharing options...
pat1 Posted October 26, 2013 Share Posted October 26, 2013 I have a non vvti. I don't drive it hard all the time but it really doesn't matter if I do. I have HKS 272/264 cams 550 injectors and stinger standalone and a PT61 turbo. 446hp@16 psi When it was some what stock I never got over 18mpg. That's with the PT61 turbo and stock 440 injectors and the stock ecu and a apex I neo Quote Link to comment Share on other sites More sharing options...
devil280Z Posted October 27, 2013 Author Share Posted October 27, 2013 damn, I bet she flies with those mods. Plus you cant complain with that much hp, always going to have bad gas mileage. Quote Link to comment Share on other sites More sharing options...
Avernier Posted November 11, 2013 Share Posted November 11, 2013 I got 25ish on my non vvti 1j 280z. Totally stock. They run pig rich with factory management. An safc does wonders for fuel economy. Quote Link to comment Share on other sites More sharing options...
ask92 Posted November 12, 2013 Share Posted November 12, 2013 If gas mileage is any concern of yours i would not go with a JZ. I would go with a sr20 or something smaller. Quote Link to comment Share on other sites More sharing options...
devil280Z Posted November 12, 2013 Author Share Posted November 12, 2013 Im really not concerned, I was just curious. Quote Link to comment Share on other sites More sharing options...
ask92 Posted November 13, 2013 Share Posted November 13, 2013 (edited) I have found with the OEM JZ engine if you stay out of boost you can get low 20s in fat supras, so I would imagine if you stay out of boost in a Z mid 20s should be attainable. However you don't swap in a 300+hp monster to drive like a grandma . Edited November 13, 2013 by ask92 Quote Link to comment Share on other sites More sharing options...
badjuju Posted November 27, 2013 Share Posted November 27, 2013 If you aim to set it up for it, you could hit 25. I wouldn't romp on it at all on that sort of tune, but if you head into the project with the right design (I'm running VEMS, it'll allow on-the-fly tune switching), I don't see why you couldn't hit mid 20s without much issue, and you could probably hit low 30s, depending on how close to the wire you want to play it. The s30 weighs like a thousand pounds less than the mkiii supra, IIRC. Quote Link to comment Share on other sites More sharing options...
ARZ_ Posted March 5, 2014 Share Posted March 5, 2014 (edited) I have driven my 7M powered Z to Vegas 3+ times and SoCal 4+ times to the MSA west coast nationals and vacations, and have gotten 27~28 mpg when I kept my foot out of it and left the A/C on. I used a GPS to get accurate mileage as I have a 3.73, CLSD, and checked it via the pump for actual gallons, on the trips to and from. But if I abuse it, I can get it down to 15~17 mpg. Edited March 5, 2014 by ARZ_ Quote Link to comment Share on other sites More sharing options...
Avernier Posted March 5, 2014 Share Posted March 5, 2014 I dont believe it ran that much. Quote Link to comment Share on other sites More sharing options...
Quin Posted March 22, 2014 Share Posted March 22, 2014 Some of these gas mileage numbers have to be way off. The numbers you guys are throwing out are worse than. I get in my Supras, which weigh literally half s ton more. My 7M cars averaged 10-20 driving hard, 24-26 on the interstate typically. Current 1J car averaged 22, all city driving. 10.0-10.5 AFR everywhere in a full weight MK3 Supra. 6262/440cc injectors. I have seen several 1J Supras with standalones hugging close to 30MPG with conservative driving, I would think Zs could best that. Quote Link to comment Share on other sites More sharing options...
Avernier Posted March 24, 2014 Share Posted March 24, 2014 10.5 afr's? Thats just about not possible. That makes me instantly not give a crap about anything else you say. Quote Link to comment Share on other sites More sharing options...
Owndapwn Posted March 26, 2014 Share Posted March 26, 2014 10.5 afr's? Thats just about not possible. That makes me instantly not give a crap about anything else you say. He's talking about his air-fuel ratio. He means he's running a 10.5:1 ratio of air and fuel. 10.5 is a little on the rich side, but not by much. I think target is 11-12 cruising, 15 engine braking, and 10-10.5 when accelerating. This is for the 7M, and I draw the numbers from memory. I might be wrong. Anyways, got a buddy with an MA70 with a 60:1 CT26 (Up to 14psi). He's running lean, but not dangerously so. After he fixes his BHG (Which made it to 197k miles with the stock headgasket), he'll install the 550cc injectors and Lexus V8 MAF, straight pipe and downpipe. Then he'll need a new clutch because his stock one will have slipped itself to powder, and then maybe a fuel computer. Right now, with just the 60:1, he gets 23mpg driving normally now that he fixed his knock sensor and vacuum leak. ~6-8psi per gear when accelerating, 4.5k shift points, with the occasional 14psi, 6.5k pull. In a car 1300lbs lighter (Including his stereo equipment), the mileage should be easily in the high 20's. 27mpg practically, but capable of 30mpg if driven stressfully calm. BUT this requires the engine running correctly. Willing to bet that Pat1 has some sensor messed up that's making it run rich, or his driving habits are rough for a daily. The knock sensor is pretty much always out on the MA70. No idea about the JZA70, but stands to reason. Other than that, if he's running larger than 550cc injectors (Again, based on 7M stats) with a stock ECU, it doesn't know what to do with it and just dumps fuel all the time. Quote Link to comment Share on other sites More sharing options...
Avernier Posted March 26, 2014 Share Posted March 26, 2014 (edited) I know exactly what he's saying, and your way off. Why do people post so much on this forum when they have no clue what they're talking about? Edited March 26, 2014 by Avernier Quote Link to comment Share on other sites More sharing options...
pat1 Posted March 26, 2014 Share Posted March 26, 2014 Your air fuel ratios are way out. 10.5 is rich as hell. That's just will make your eye water standing behind it. Lol 14.7-15.1 cruising fuel Econ. Accel 11.5-12.3 that's in the boost. I'm running standalone no wires are crossed lol. I'm on the gas a lot and that why it's getting bad mileage. But I don't care I didn't build it to get good fuel mileage. I build it to beat the hell out if it. I've been tuning it a little lately. I'll see what I can get out of a tank and report back. 446hp @16 psi on a stock bottom end 1jz is running pretty good. I promise that there are no crossed wires.... Lol Quote Link to comment Share on other sites More sharing options...
pat1 Posted March 26, 2014 Share Posted March 26, 2014 I know exactly what he's saying, and your way off. Why do people post so much on this forum when they have no clue what they're talking about? I agree with you 100% Avernier. Quote Link to comment Share on other sites More sharing options...
Quin Posted March 27, 2014 Share Posted March 27, 2014 (edited) Pretty much the only time it went north of 10.5 was at idle, right around 11.0. Idk maybe my brand new AEM wb reading is off but smell/plugs back it up. Car had JDM 2J 440s with a stock fpr, no tuning whatsoever on a JZA70 ECU. Distance/gas used from fill up to fill up put it right at 22.4 MPG. Was breaking in my clutch so pretty much zero boost. Unfortunately, my very first pull grenaded that R154 and I haven't driven it since so can't say how much worse it'd be with decent weather/ aggressive driving. Edited March 27, 2014 by Quin Quote Link to comment Share on other sites More sharing options...
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