How "plug and play" is the Haltech Pro for R33 GTST

[joshuaho96]

  On 01/01/2025 at 10:28 AM, Dose Pipe Sutututu said:

It's not bad, it's just not flexible.

And say if you have any leaks between the MAF and plenum, well then your load axis goes out the window.

Here's a real world scenario, I blew off an intercooler hose last track day, as the clamp decided to Bluetooth itself somewhere. Still continued to do 2 laps and drive it to the pub for a couple of beers then home.

Good luck doing that with a MAF setup 

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It's weird to me that you say this because I'm pretty sure locals with relatively standard standalone tunes (boost/barometric compensated alpha-N) still have driveability issues when they pop intercooler hoses. Maybe with enough data I can just train some kind of model that spits out an expected grams/cyl given every sensor input except MAF like what FCA did with their Pentastar 3.6 ECU logic.

  On 01/01/2025 at 11:23 AM, MBS206 said:

What are your plans for your blow off valves? Purely plumb back? How soft will the spring in them be?

AFM can be tricky to get super smooth and nice, especially depending on the rest of the system, and then can be very easily upset if something slightly changes. IE, even if you run recirc blow off valves, you could still see issues getting it to behave at certain load points as turbos might start to spool, but you release the throttle but it's not enough pressure to crack the bov open to recirc, and you can end up with reversion which can cause double metering, and hence dumping of fuel into the system, and stalling the engine.

 

If you're going to run a map sensor for closed loop boost control from the ECU, what makes you want to keep the AFM?

 

 

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Basically stock everything. The main motivation honestly is to have a sensor that can be a decent baseline source of truth. In scenarios you're describing obviously it won't work every time but it seems to me the number of corner cases that exist in MAF load is maybe not as severe and difficult to manage vs ITB alpha-N with some MAP/barometric compensation.

[Dose Pipe Sutututu]

  On 01/01/2025 at 10:20 PM, joshuaho96 said:

It's weird to me that you say this because I'm pretty sure locals with relatively standard standalone tunes (boost/barometric compensated alpha-N) still have driveability issues when they pop intercooler hoses.

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Means something is not set up right, tune/calibration related.

 

[joshuaho96]

  On 01/01/2025 at 11:04 PM, Dose Pipe Sutututu said:

Means something is not set up right, tune/calibration related.

 

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AFAIK does the base map for Haltech even have the 4D compensation enabled? It's been a while but when I looked at it I remember it was actually using pure TPS as one load signal and MAP for another. Seemed workable but not ideal by any stretch. A lot of people have "make the event-itis" which leads to stuff like this happening.

[Dose Pipe Sutututu]

  On 02/01/2025 at 9:17 AM, joshuaho96 said:

AFAIK does the base map for Haltech even have the 4D compensation enabled? It's been a while but when I looked at it I remember it was actually using pure TPS as one load signal and MAP for another. Seemed workable but not ideal by any stretch. A lot of people have "make the event-itis" which leads to stuff like this happening.

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Just had a look, they don't.

Fuelling on the base map is purely alpha-N, and the ignition table is MAP.

Remember it's just a base map to get the car moving  

[MBS206]

  On 02/01/2025 at 1:16 PM, Dose Pipe Sutututu said:

Just had a look, they don't.

Fuelling on the base map is purely alpha-N, and the ignition table is MAP.

Remember it's just a base map to get the car moving  

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Everyone wants an ECU they can plug onto their engine, modified or not, and put of the box it just runs perfectly like a brand new modern engine straight off the production line.

Too many people just don't understand things like the base maps are as you said, just to give a starting point, and then you need to spend time getting it right for your vehicle.

 

I wonder if the people wanting it are the same ones who'll just buy a chip for a "stage 2 tune" online and then wonder why their engine blew up...

[GTSBoy]

I can't believe that anyone is foolish enough to believe that the base maps are for any other purpose than to drive the car up onto the trailer/truck or gently creep it to the dyno. No matter how good they are, they can never be any better than the factory maps**, and only the foolish trust those on a significantly modified setup.

**Yeah, yeah. I know there's also the difference between factory maps being fixed to certain injector sizes and MAP/AFM/VE relationships, and the likely aftermarket ECU base maps being better able to handle the sorts of changes that would render a stock ECU dangerous, like different sized injectors. But let's just ignore that for the moment, because the principle is still the same.

 

[Dose Pipe Sutututu]

In terms of base maps, Haltech ones are the best by far.

The ignition table for VCT motors are nearly the same as the OEM one (vacuum area -> atmospheric).

Provided the AFRs are safe and fuelling is good, I would not hesitate taking the base map onto a track with a near stock turbo.

Disclaimer: I pretend to know what I'm doing, and have only blown up two of my own motors and noone else's motor I've tuned in the past.