1JZ BPU Gas Mileage?

[annoyingrob]

I find it funny that over the years of mods, my car STILL gets the same milage that it always has. From stock 1JZ to big single standalone 1.5JZ

In the city, 60L gets me ~350km. On the highway, 60L gets me ~630km (even with boosting, and excessively speeding). I drive with a pretty big lead foot.

 

[Ken]

on my stock ecu i was getting incredibly shitty gas mileage. i used a whole tank to go to dallas, which is about 250 miles.

on my sard ecu it only takes half a tank to go 250 miles.

i avg about 24-25 mpg.

 

[SupraClaou]

damn i need to get my car done, i still have half a tank of premium in there!

Me to bro,me to.....
Let's get those motors fired up :icon_bigg
Tommorow I am going to work on the jz project,from 18:00 till 00:00.
With a little luck I should get it ready in 2 weeks :icon_surp
Can't wait that moment of me puting the key into the ignition :love:

 

[Ds650rida]

i need money, i still gotta get $1000 worth of stuff

with the 7m i got about 320 miles to 14 gallons cuz i'd always fill up at the same level and always came out to 14

 

[10secdream]

I am getting about 400kms of city driving in 50L on my 1JZ. Only mods are full 3 Inch Exhaust, HKS Front Mount Intercooler and an HKS Intake. Stock boost still as well. On the highway I get about 750km per tank.

 

[becauseican]

I normally get around 300-400 kms on a tank but have gotten as little as 240 kms on a tank with a very heavy foot and lots of racing. I get 450-500 kms on the highway. This is with a DBB SP61, 550cc injectors, 3.5" exhaust and a Mines ecu/ SAFC.

 

[viperkillertt]

HAHAHA! :aigo:

I got 78 miles to a tank once :aigo:

 

[honestabe]

Finally calculated my mileage on 92 Octane Oregon gas with hard driving, 15 MPG. Ouch! Average speed for 212.2 miles is only 21 MPH, so I'll count that as heavy footed city driving. I'm going to try driving gentle and see where that gets me. That, and getting some wider wheels.

Adam

 

[viperkillertt]

Mine have been super erratic. The first fill up after the swap i calculated about 21. I was extatic, after that it was like 16. Since then it has been between 12 and 17. I just changed my thermostat to hopefully help, but i am kinda worried. I really dont drive with a heavy foot, so i was expecting in the 20's. That really was one of the main reasons to do the damn 1jz swap. I do think i need a new fuel pump also. it is a bit fishy at low rpms and has run a little lean under boost. Nothing bad, just sticks at about 14.5 afr under boost some times.

 

[OneJoeZee]

Nothing bad, just sticks at about 14.5 afr under boost some times.

14.5 under boost is bad.

 

[viperkillertt]

i know, but i am also not redlining her, i have only taken her to about 4700rpm. That was when i had the bad thermostat in. The last fuel map showed 12.5 under full boost. I am being very careful. I am guessing it is just the 7m fuel pump. Anyone else have ideas? It has the little rpm bump at idle and lower rpm and leans out under full boost. Any other ideas?

 

[OneJoeZee]

12.5 is still pretty lean, man.

I'd be careful. I don't know if it's your pump or not. Could be on its way out.

I only had the stock pump in my blue car and it was fine running a 1JZ around 11-14psi.

 

[viperkillertt]

12.5 is still pretty lean, man.

I'd be careful. I don't know if it's your pump or not. Could be on its way out.

I only had the stock pump in my blue car and it was fine running a 1JZ around 11-14psi.

How is 12 lean? What are you running under full boost?

 

[supraracer49]

I say I have gotten anywhere from 12 to 25 mpg on mine. All depends on how you drive it with the stock twins

 

[annoyingrob]

How is 12 lean? What are you running under full boost?

It all depends on the tune



My stock twins used to run 12.5:1 on the dot, and it was awesome. It had a very good tune though.

 

[OneJoeZee]

It all depends on the tune



My stock twins used to run 12.5:1 on the dot, and it was awesome. It had a very good tune though.

You have a standalone.

 

[viperkillertt]

So again, i am wondering how 12 is considered lean?

 

[OneJoeZee]

How are you achieving AFRs of 12 or higher with stock twins and stock ECU? What's your boost set at?

12:1 AFRs are a little on the risky side for a stock ECU. Not worth it to me. I would tune it a little more conservative than 12.5:1. And definately not 14.5.

And with a stock ECU, you don't have timing control, which is an important part of a safe tune.

You might be able to do 12.5:1 and be ok but if that's the lowest AFR you're seeing and 14.5 is the highest under boost, you're asking for trouble.

conservative tune is 11.5:1 range. most lean youd ever want to go is 12-12.3:1 it will make a little more power running that range, but less room for error. 11.5:1 range you can make really good power yet still have a good margin of safety.

http://www.supramania.com/forums/showpost.php?p=159348&postcount=2

 

[viperkillertt]

Mine is a remapped ecu by Blitz. I believe they adjusted the timing.

How are you achieving AFRs of 12 or higher with stock twins and stock ECU? What's your boost set at?

12:1 AFRs are a little on the risky side for a stock ECU. Not worth it to me. I would tune it a little more conservative than 12.5:1. And definately not 14.5.

And with a stock ECU, you don't have timing control, which is an important part of a safe tune.

You might be able to do 12.5:1 and be ok but if that's the lowest AFR you're seeing and 14.5 is the highest under boost, you're asking for trouble.



http://www.supramania.com/forums/showpost.php?p=159348&postcount=2

 

[buldozr]

It all depends on the tune



My stock twins used to run 12.5:1 on the dot, and it was awesome. It had a very good tune though.

:werd: Just a basic piggy back like emanage blue or emanage ultimate will yeild you timing control(not very expensive) Timing control is where its at, you can crank up the timing off boost and reduce the lag times significantly. :naughty: