My first Lambda Target table

Here is my first attempt at my own Lambda Target table. Does this look like a sane table? I have watched the videos on AFR/Lambda and I've opted for the richer side in each of the explained regions.

I'm confident in tuning the fuel/ignition on steady state dyno but wanted to get my lambda target table locked in.

Any feedback/improvement/suggestions is highly appreciated.

Thank you for your time!

Philip

Any context on the engine?

Hello

Yes It's a Saab B234 2.3 turbo, Pulsar G30-660, 1200cc Bosch Injectors, Hellcat 525LPH fuel pump, Bosch 68mm Throttle Body (E-Throttle), Vag smart coils, Custom exhaust manifold with external screamer pipe 45mm pulsar wastegate.

To make 660BHP, you will need to be at just over 4:1 PR. The target table goes to 300kpa, which you should almost never exceed on this turbo. The 1200cc injectors are a tad small to really push the limits of the turbo. With the 68mm, you will most likely see a throttle body pressure ratio of 1:1 at 40-60% opening. Keep this in mind when setting up the boost control.

If the car is a "street car," I would lean out the cruise a tad more, but only by a few %.

Thank you for this information. I'm pretty new to all this and eager to learn. I have infact simplified my lambda target table since watching a few more webinars as I believe it was over complicated. I also compared with a few other lambda target tables too. This is what I came up with.

Yes this is a "street car" and I have changed my idle/cruise area to lambda 1.0

I'm not necessarily trying to make 660 and max the turbo out, but 600-635 would be nice. Are you saying that I don't need to go further than 300kpa to make this sort of power on this turbo? I thought 300kpa was infact 2.0 bar actual gauge pressure? What sort of pressure would you expect to be making around the sort of power I'd like to make? I purchased the 1200cc bosch injectors as I was advised this was adequate for around 600bhp with headroom. There's a few things you said I don't totally understand if you'd be willing to explain some more to me?

"To make 660BHP, you will need to be at just over 4:1 PR"

PR as in Pressure Ratio? Could you explain a bit more about this?

"With the 68mm, you will most likely see a throttle body pressure ratio of 1:1 at 40-60% opening. Keep this in mind when setting up the boost control."

Does this mean that with 40-60% opening this will pretty much be like 100% throttle? When you say keep this in mind when setting up the boost control what exactly do you mean?

Sorry for all the questions. I'm autistic and very literal with things and like to know all the ins and outs.

Thank you so much for your time!

Philip

[EDIT]

I've tried to research as much as I can with the information you've given me and I'm very thankful for your time. I'm under the impression that 2.0 bar should be the ABSOLUTE most I should push for and not hold this to my 7500rpm limit. I should be able to make around 600bhp roughly I think. I'm going to be very conservative with the boost. I'm going to run from compressor to T peace to bottom of dome, boost controller to top of dome. Simple open loop boost control in maxx ecu.

I haven't set anything up yet. But I'm guessing with the TPS adjustment I should take into account that 40-60% will be like having the throttle fully open, so I should account for that here. How would you advise for a ball park figure?

Also very conservatively I will be adding duty cycle to the top of the dome bit by bit until I reach a sensible boost pressure from low to high rpm and start to build the curve.

Thank you so much for your time any further insight you can give me is highly appreciated! I'm fascinated to learn more.

Philip

I couldnt find the compressor map for a Pulsar G30-660 so I used a Garrett one. I did mean to type a compressor pressure ratio of 3:1. You dont need to have the target lambda map go to 400kpa. 300 is already enough.

"Does this mean that with 40-60% opening this will pretty much be like 100% throttle? When you say keep this in mind when setting up the boost control what exactly do you mean?"

Yes, The boost tables as you have them set up are for open-loop. If you intend on staying with open loop control, there are better methodsfor table setup. MAP target control with closed loop is better and I would recommend this. Initially you will tune the engine in what ever manner you see fit. You will tune the boost control. Confirming and validating varying levels of boost. After this you can find the minimum throttle for maximum HP/Tq and use this as a reference for your boost control target strategy.

You can reduce the MAP target from the minimum throttle and gradually increase it to maximum pedal. This way the nonlinearity in the throttle body will be offset by the change in MAP targets. That range can be linear, progressive or digressive depending on how you want the car to drive.

On the dyno the focus should be fuel table, ignition timing, boost, knock, vvt. You will confirm the min throttle for max hp, this can even be in a 5-10% window. Once off the dyno, you can set up the tables to make this work how you like.