joyrider

iTrader: (8)

I have 2 spots in boost (140-150kPa @5500-6000RPM) where the values are at 255 and AFR at 13.2 while target is 11.7 for these cells.

What's the best way to solve this situation ? Everything else is on par with AFR target, only those 2 cells.

2000 LS, turbo Begi gt2560, stock injectors, stock fuel pump and fuel pressure, 13.2 req fuel in tunerstudio.

18psi

iTrader: (76)

2 words: req fuel

joyrider

iTrader: (8)

And you're right. Will try 15.2 and multiply fuel table by 0.87

y8s

iTrader: (8)

also a reminder to make sure "multiply MAP" is selected in "General Settings"

Techsalvager

What is your injector dead times at?

richyvrlimited

iTrader: (1)

Um is the issue not stock injectors at 7psi?

Are you sure it's not just you're at 100% Injector DC and Autotune, or whatever is desperately trying to add more fuel to hit your target, but nothing's changing as you're already at max?

Req_fuel is correct for stock injectors...

18psi

iTrader: (76)

oh crap just saw that he said stock injectors

Yeah, you're done son. Get a pump and injectors stat

pdexta

iTrader: (17)

I'm sure it won't be popular around here, but if you want to cheap out for the time being a $70 walbro 255 will supply more fuel than the stock pump. Should be enough to get you by for the time being I would think. Then again, some $100 RX8 injectors would give you a good bit more headroom.

richyvrlimited

iTrader: (1)

pump is irrelevant if the injectors can't deliver the fuel you need.

What the OP needs is bigger injectors, or if he/she wants to bodge it a RRFPR.

joyrider

iTrader: (8)

Yes it is selected

1.0 ms for the stock injectors

Had some RX7 460cc but they never worked in my car and a friend needed some quickly so they're gone.

Will check for RX8 one's and new fuel pump.

stefanst

iTrader: (1)

You shouldn't need a new FP. My '99 stock pump is OK up to 15psi boost with an FM setup.
Sadly my stock rods weren't OK up to 15psi.

joyrider

iTrader: (8)

Well there s not enough fuel maybe a cause to the Vishnu fuel rail. I ll pick up a Walbro tomorrow. Any advice on wich one to get?

stefanst

iTrader: (1)

Read the above posts: You're running stock injectors. They're too small for anything above 3-5psi or so. That's why you're running out of fuel. You can buy all kinds of other things, but the problem is injectors.
Buying a bigger pump won't help- only increasing the fuel pressure would help. And that's a band-aid at best. In order to increase FP you need an FPR. But get injectors instead and be done.

joyrider

iTrader: (8)

I Will try to find some RX8 injectors andFPR too. Problem should be solved for good.

Techsalvager

Just need to buy fuel injectors for more fuel, don't worry about a fpr

buffon01

iTrader: (9)

That's not very smart or useful. Get 460's at least, before your engine grenades.

joyrider

iTrader: (8)

Bought Injector Dynamics 1000cc. Have to drive 2 hours to get them this afternoon.

Dead Time supposed to be 1.0ms.

What Will be the new req fuel ? I think 3,4 but I m not sure.

buffon01

iTrader: (9)

Tunerrstudio/Megatune will calculate that for you on the req_fuel.

shuiend

iTrader: (24)

Best injectors on the market. You did good picking them up.

joyrider

iTrader: (8)

Idle is rough but i was only able to change the req fuel to 3.4 because the laptop died.

Going back atm.

Edit: injector 2 don t fire, 12V on white blue but where the hell does the purple / Green wireconnect?

Edit 2; wire going to 4x and to sequential injection board. Seems like thé board is defective. Will try to put it in batch mode.