1J With 2J MAP and 440's

[honestabe]

I went on the dyno today and my A/F ratio got down to 10:1. My mods are below. Question is, how would putting in JDM 2J 440cc injectors affect my A/F ratio? Below is my Dyno graph and info.

1JZ-GTE, 1 piece aluminum 11 pound driveshaft, 2JZ-GTE MAP, ACT clutch kit, HKS cold air intake, DM 3" DP, 935 Motorsports 3" DIY exhaust system with 5" Megan Racing GT muffler, Koyo aluminum radiator, 92 octane gasoline.

 

[annoyingrob]

440s will make it richer everywhere. You'll be reading <10:1 a lot more. I hope you know 10:1 is RICH, and putting 440s in will make it RICHER.



and just so you know, 2JZ MAP = 1JZ MAP. Different part numbers (different mounting), but same scale.

 

[honestabe]

IIRC the 2J MAP is a little different. I remember reading something on them not too long back.

 

[Rich]

the ecu doesn't know there are bigger injectors, so it still keeps using the same opening times which results in more fuel being injected by the larger injectors with the same amount of air mass which results in a richer mixture

i can tell from personal experience there IS a scale difference between 1jz and 2jz map sensors
1jz max reading is 1bar boost
2jz max reading is 1.2bar boost

when I didn't have my blitz ecu yet, I was able to raise the boost cut by switching over to a 2jz sensor, also i needed to adjust my eman fuel map to compensate for the different boost read out
so I say there is definetely a difference between a 1jz and a 2jz map sensor

 

[annoyingrob]

the ecu doesn't know there are bigger injectors, so it still keeps using the same opening times which results in more fuel being injected by the larger injectors with the same amount of air mass which results in a richer mixture

i can tell from personal experience there IS a scale difference between 1jz and 2jz map sensors
1jz max reading is 1bar boost
2jz max reading is 1.2bar boost

when I didn't have my blitz ecu yet, I was able to raise the boost cut by switching over to a 2jz sensor, also i needed to adjust my eman fuel map to compensate for the different boost read out
so I say there is definetely a difference between a 1jz and a 2jz map sensor

Really? Because I have seen tests of 1JZ vs 2JZ sensor scales, and they were identical.

I even tested my own 1JZ sensor. Maxed out reading at 1.3bar

 

[tissimo]

Really? Because I have seen tests of 1JZ vs 2JZ sensor scales, and they were identical.

I even tested my own 1JZ sensor. Maxed out reading at 1.3bar

how was it tested?

I had a 2jz map a long time ago on my 1jz car. I hit boost cut around 15 psi. My buddy would hit boost cut at 14 psi. So seems like they are scaled different.

 

[annoyingrob]

how was it tested?

I had a 2jz map a long time ago on my 1jz car. I hit boost cut around 15 psi. My buddy would hit boost cut at 14 psi. So seems like they are scaled different.

Read various voltages at various different pressures, and logged the results. If I didn't sell my extra 2JZ sensor, I would go test them again.


Here's a link to a discussion over on Toymods on the matter:
http://www.toymods.net/forums/showthread.php?t=15998

There was another discussion where the results were actually graphed, but I can't find it right now.


Maybe there's a few different sensors that read differently causing confusion?


Edit: The "Apexi" pressure sensor he's talking about is the Denso 3bar sensor. This is what I'm currently running in my car.