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Interesting, thank you for the link. I do like it but I honestly never really thought through the thought that having a normalized axis would kind of require VE to come back in or maybe that is just to make the integration easier to deal with, either way its an interesting implementation.

Our maf is done in a way that the number in the table is equivalent to a correction %. The maf algorithm calculates cylinder filling and the table is only there to be able to calibrate out resonance, inaccuracies and other effects. Nice. I've not seen that before. What are the units on the axis? Th...

Both work, I just find it much easier to work MAP and VE because they apply the same to every engine, nothing new to learn. I'll add this, I would like MAF a lot better if it were normalized....MAF/rev/cc or something like that so the numbers become universal Like MAP and VE numbers are. But even t...

[MAP....it gives a pretty direct indication of cylinder pressure which is vey helpful knowing where to set timing. grams/cylinder tells you cylinder pressure. No it doesn't...it implies it depending on cylinder size and IAT, so you care about a different value for every engine size and IAT. MAF is ...

If I had to pick a MAF or a MAP sensor, I'd take a MAF any day of the week. Funny, I always go MAP when I can and MAF as a last resort afterboth speed density and alpha-n, so I never use it :) I love the concept of the MAF and I think on a modern stockish or stock other than higher boost it probabl...

OrchardPerformance wrote: ↑

Sun Sep 26, 2021 11:06 pm

The ideal system is a hybrid that uses both maf and map to build a better picture of the airflow but we don't have one of those. (Yet)

I think the ideal PERFORMANCE system includes the MAF in the dumpster....just sayin.

Is auto tune looking at O2 readings? If so then the tune is right and as you say there injector flow is probably wrong.....so do you care what is in the VE table is if its running good? If so do you know where the VE should be on this particular engine? 90% so doubling the injector flow rate would p...

Copngrats! Driving it must have felt great after so long..... would imagine anyway.....not that I would know what actually driving a V12 car is like....

The BMW actuator would work fine for me, i'm sure. But the $500+ cost steers me away from it. I've also heard that it does consume a lot of power. For now I'll try to adapt this LS3 throttle to do the job, if I need to drive it externally, I'll work that out when I get there. I think I paid $50 on ...

The ETB driver in my HW is a 2 channel freescale chip, 5A/channel. The ecu designer/manufacturer told me that on road race cars with big TBs and the throttle opening and closing all the time they had trouble with the chips overheating and shutting off the throttle so they had to change the programmi...

My only concern is the heat coming off the driver chip. It is hot to the touch after a couple minutes, and I'd like to modify the ETB to drive 8 ITBs. Is that going to be too heavy a load and cause it to fail? I am driving 12 ITBs and the motor pulls well over 5 amps....closer to 10. Its a BMW moto...

some of my cars drive at 800hz. no idea if lower frequency would help On mine I tried 500-40khz.....1000hz works the best, 500 was fine too really but needed different PID numbers, nothing above 2khz really works at all but anything below does. I'm in no way an electronics guy but read wire length ...

mck1117 wrote: ↑

Tue Sep 21, 2021 6:07 pm

Before you start adding closed loop, figure out how to make it stable at 800rpm. If your engine isn't stable at 800rpm with fixed idle position, something else is wrong.

That is what I was also trying to say in my much longer less clear way.....open loop needs to work right first.

You really need to get to where you have a stable idle with idle control off. An idle ignition table as you say or where I prefer is to put that info into the main spark table and fuel fables because it generally makes a smoother transition coming off idle then a table switching setup. Timing should...

What is it? Did VAG have a port-injected v8 engine/ECU or was it direct injected v8 already? Ferrari is not now nor was it ever part of VAG. Both companies use Bosch so things often look similar but I don't believe any of it is interchangeable. I'm pretty sure the Ferrari and Maserati ecu versions ...

mck1117 wrote: ↑

Mon Sep 13, 2021 8:45 pm

put it in the dishwasher

I'm sure that would work great.....Bachelor I assume?

I found these screen shots from the motec system ....I think from the manual, don't recall. They held constant rpm and did a step MAP change before and after tuning the wall wetting, again iirc. You see the lambda move about 20-25% before and 5-10% after so it works pretty well. Before M1 film befor...

That looks a lot like what is described in the motec M1 manual and what I kind of semicopied into my ecu. If you down load the motec software there is a good writeup of how their system works in the help section. Attached is a writeup of what I did, its not tested on a running engine but seemed to d...

you mean EGT ... right ... No, EGR as in Exhaust Gas Recirculation. A gasoline engine running at partials throttle is pretty inefficient because its doing work to pull a vacuum in the manifold, which then is effectively decreasing the compression ration in the cylinder....so a double hit. Either le...

CAUSE ... you don't need separate VE table for "economy" mode .. or "power mode" .. It is not about "what driver wont" ... It is about "WHAT ENGINE NEED" ... At 4kRPM and 35%TPS and 90kPa MAP engine need 6.3ms Inj time .. and ... At 4kRPM and 35%TPS but 80kPa...

0,1,2 Basically no air box is fine, a bad airbox is not fine. The exact gain with the airbox depends on the engine....a 1 cyl maybe 5%? as much as 5-10 on 3 or 4 cyl. I don't have much experience making a good airbox...H-D engine have uneven pulses so the box doesn't work and V8s to many pulses for ...

I'm sure a rusefi will make it run better and will be a nice upgrade, you should do it. I was just trying to caution you to set realistic expectations for what a new ECU can deliver. One have a 1 cylinder so a lot of the little thinks modern ECUs can do to get every cylinder running perfect don't re...

But i dont. My targets are different and not so big. And i have no target to boost HP at all. .... Yup. And fast revving up from idle to middle-revs. As i understands it is CPG+transmission-mass\torque ratito. If you are not interested in factory race HP then why include the information in your pos...

I used to race an H-D XR1000, the big brother to the the XR750 dirt tracker so similar to what you're after. The 750s made 90-100hp, my final road race version at 866cc made about 110, so right around 127hp/l for either version and higher output than you are after..75hp/.7l=107hp/l. ECU tuning playe...

Wau Mark im in your 168 page Thread at gemellocattivo You are an artist... and that is why nothing is ever actually finished :oops: Can't wait to see what you do with the lambo engine! More low end plus more top end in basically the holy grail of engine building :D I only have simulations to go by ...

Now I have a customer for my Lamborghini Espada with a 4L V12 ....The Engine will have a Lamborghini Diablo Crankshaft and new Liners to bring it up to 5.7L ...wind the engine up to 10500RPM (max Power at ~ 9700RPM ....So I will go with 6 45mm Jenveys Heritage DCOE (6 double =12 throats) Injection ...

..in real life... is difference a half tooth on offset between HALL and VR... on 60-2 is 3deg., on 30-1 is 6deg. etc. yes, if they work at all. The tooth design really needs to match the sensor. or you end up with a buggered signal that is impossible to decode reliably...a lesson I learned the hard...

Mind you, he's not using rusEFI. .... PS: this is exactly the same math rusEFI does internally if you have a fuel pressure sensor configured. Yes, sorry for not making that clear but I thought I'd read before that you support a fuel pres sensor and that with the flow math you describe has got to ge...

Would it be acceptable for your setup to have a (not-OEM custom) relay between rusEFI and supercharger solenoid? FWIW we all know that in the open source world lots of people will bodge the boards but IMO you, the manufacture, shouldn't be one of them:) All ECU need relays so there is no shame in t...

mk e, you mentioned you ran the pressure down to 1 bar before the flow calculations started to fetch up in the ECU. Does that imply your ECU is using fuel pressure as one of it's inputs? Al Yes Fuel pres , fuel temp are inputs. I run GM style injector tables using 3 tables with flow v pres, flow v ...