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VW B5 Passat TDIs This is a general discussion about B5 Passat(>98 (2004-2005 in North America)). Non TDI related postings will be moved or removed.

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Old July 3rd, 2019, 06:56   #16
d0u8l3m
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Quote:
Originally Posted by QuickTD View Post
I do not know of any tuner that is writing a BEW MPC file to the ECU via BDM for a manual swap, that is just silly. In fact, the reason for using the modified BEW codeblock is to avoid such a thing. The stock BHW flash can be pulled using an alientech portable flash unit or MPPS, and emailed to the tuner. The conveniently compatible BEW manual codeblock is added to the data with maps modified to suit the BHW. The file is then emailed to the customer or dealer and it is flashed back into the customers ECU. This avoids sending away the ECU have it opened and BDM'd.

I need to ask Kerma, have you ever actually done this stuff yourself, or do you have someone doing your tuning for you? Legit question, not a dig. It just doesn't sound like you've been into the "nuts and bolts".

I don't think it is a terrible shortcoming to have one measured value block missing, which is really just an oversight that could be enabled if anyone cared to do so. If you are tuning beyond a generic stage 2 tune, I feel it prudent to have fast responding, standalone gauges anyway.

I am not aware of any other shortcomings of this method of tuning for a manual swap. I have done several manual swaps and have logged many, many miles in all of them. Some I've even tuned myself, heaven forbid... They all work great. Even some with self installed PD nozzles...
Yeah idk what hes talking about with writing a BEW file to a BHW ecu straight up, since the maps are in different locations. It wouldn't run like that, I don't think. I'm not sure if they are even from the same Bosch project, so you would need different definition files (not 100% on this).

Either way its like you said, nothing wrong with mapping BEW software over to the appropriate locations, both are the same EDC16 units with the same control schemes. I just checked my passat and I cant access the sensor in VCDS, so that's how malone does it, and I haven't had any issues other than a TCM code coming up every now and then in central convenience. Doesn't trip a CEL tho, I usually only see it when I scan during my oil changes.
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Old July 7th, 2019, 18:55   #17
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This discussion got lively while I was unplugged for the Holiday! I'm appreciative of the info provided here.

Sooo, has anyone used the stock EGT sensor and wired to an aftermarket EGT gauge? I would think some BHW swaps have done it. If so, what's worked?

I can't access EGT via VCDS (or likely any other device), and don't have the funds for another tune right now.

JP
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Old July 9th, 2019, 03:30   #18
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Originally Posted by J.P. View Post
This discussion got lively while I was unplugged for the Holiday! I'm appreciative of the info provided here.

Sooo, has anyone used the stock EGT sensor and wired to an aftermarket EGT gauge? I would think some BHW swaps have done it. If so, what's worked?

I can't access EGT via VCDS (or likely any other device), and don't have the funds for another tune right now.

JP
It probably wouldn't read accurately unless you knew that the mV per degree matches the gauge. I have an email from new south with troubleshooting info that has what theirs is supposed to read:

4. Measure for mV reading, and the table is as following.

Celsius 200 300 400 500 600 700 800 900 1000 1100 1190

Fahrenheit 392 572 752 932 1112 1292 1472 1652 1832 2012 2174

mV 8.138 12.209 16.397 20.644 24.905 29.129 33.275 37.326 41.276 45.119 48.473

You'll probably be better off just getting an aftermarket probe/gauge combo.
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Old July 9th, 2019, 14:32   #19
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Makes sense. Thank you!


JP



Quote:
Originally Posted by d0u8l3m View Post
It probably wouldn't read accurately unless you knew that the mV per degree matches the gauge. I have an email from new south with troubleshooting info that has what theirs is supposed to read:

4. Measure for mV reading, and the table is as following.

Celsius 200 300 400 500 600 700 800 900 1000 1100 1190

Fahrenheit 392 572 752 932 1112 1292 1472 1652 1832 2012 2174

mV 8.138 12.209 16.397 20.644 24.905 29.129 33.275 37.326 41.276 45.119 48.473

You'll probably be better off just getting an aftermarket probe/gauge combo.
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Old July 12th, 2019, 15:36   #20
Tom in PT
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I used to check EGTs on my various diesel vehicles from time to time (and boat with 94 hp diesel motor) but basically stopped looking at them because they all kept telling me the same thing over and over again:

at idle or very light throttle, EGTs around 300-350 F.


At moderate throttle, EGTs climb to 400-600 F. depending on engine load.

At high throttle for extended periods (5 min or more) temps increase to 800 or so.

I virtually never see EGTs higher than 850 for any amount of time, including my F-250 6.7 diesel towing 7,000 lbs up a 6 percent grade (~ 15,000 lbs combined weight).

My marine diesel pushing a 61,000 lb trawler at 7 knots has EGT at 600 F, and it is working at about 1/3 load swinging a 36 inch prop.


(Regens and DPF cleaning temps are NOT included in the above, but that does not apply to a VW BHW diesel)
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