HE351 code for me78569

hakcenter · January 19, 2016, 05:06:47 PM

It is a super hx40 wheel, so use that map

me78569 · January 19, 2016, 05:26:38 PM

Haha do you have that map? Verified?

I have seen a couple that might be a hx40.....

Rx7man · January 19, 2016, 06:50:23 PM

I found 3 types of maps for an hx40.. B8584, and B8579, and B8574.. Redline seems to be between 117000 and 127000 RPM

me78569 · January 19, 2016, 08:49:19 PM

From what I remember, I couldn't find a map with 130,000 rpm and a pr of up to 4.5

Holset Super 40 and Pro 52 Upgrades

Super 40 Holset Turbo Application Notes

Rx7man · January 19, 2016, 09:50:22 PM

I also wish they had a full command list for the VGT actuator.. I think there's some stuff hidden in there I might take advantage of.. Perhaps a method of mapping the raw temperature to real temperature? I'm already happy I deciphered the stuff it sends back.. Perhaps you could set the CAN bus timeout too

hakcenter · January 20, 2016, 08:51:27 AM

To find an actual dyno'd compressor map graph is going to probably be impossible.

The HE351VE uses a 7 blade compressor wheel, the same exact part number used in the Super 40hx. It flows roughly 69lbs/min

This is about the best we'll get: It is an 83/75 S300ish map that is very comparable, AFAIK they used the same compressor in it.

hakcenter · January 20, 2016, 08:54:38 AM

To find an actual dyno'd compressor map graph is going to probably be impossible.

The HE351VE uses a 7 blade compressor wheel, the same exact part number used in the Super 40hx. It flows roughly 69lbs/min

This is about the best we'll get: It is an 83/75 S300ish map that is very comparable, AFAIK they used the same compressor in it.

hakcenter · January 20, 2016, 08:57:06 AM

To find an actual dyno'd compressor map graph is going to probably be impossible.

The HE351VE uses a 7 blade compressor wheel, the same exact part number used in the Super 40hx. It flows roughly 69lbs/min

This is about the best we'll get: It is an 83/75 S300ish map that is very comparable, AFAIK they used the same compressor in it.

Rx7man · January 20, 2016, 12:55:06 PM

I want to figure out the relationship between efficiency and compressor temperature rise and superimpose it on the map, in an attempt to find out the optimal boost.

Thanks for the map

hakcenter · January 20, 2016, 06:40:03 PM

Without airflow you still won't know where you are on the map though.

Rx7man · January 20, 2016, 07:25:27 PM

If you know your turbine RPM and PR you should be able to figure it out.. and you should be able to get pretty close by knowing engine RPM, VE and temp as well

hakcenter · January 20, 2016, 11:32:20 PM

You'll know what line you're on but not where in airflow without either AFR with injection duty cycle, or a MAF, or VE with AFR.

No offense but this information is pretty much useless anyways. There's no way I'm putting a MAF upfront just to know where I'm at on the compressor map. It's not surging and its spinning 125k, what else is there to really know.

All I'm interested in knowing is if it reaches at least 125k, I know I can get over 60lbs/min out of it. Which I don't need to know while its running, only needed to know that before I mounted it on my exhaust and started boosting.

People be all like, omg its a hair drier at those speeds, blah blah. 78% to 68% efficiency at the outer edge, I would have to disagree. At those airflow rates I would be worried about intercooler size etc. But again info to know before its on the vehicle, don't really care once its there. /shrug

me78569 · March 14, 2016, 09:20:50 PM

Spent some more time tuning. The curve is adjusted down some. Added a perf mode for idle position only, smoke is down and general DD driving is nice, little high strung for my liking, but it is easy to adjust the curve with the incab pot.

3rd gear %50 pull 15psi at 1500 rpm, hard to load the engine enough to put low rpm boost. I am sure there is 5-10 psi more to gain at that RPM, but I don't like doing pulls that low often.

I need to spend some more time on the boost / drive readings to make them work right at various altitudes, but low on the list of thing sot do in life.

Rx7man · March 15, 2016, 10:18:00 AM

You can build pretty much unlimited boost at any RPM if you can load it hard enough and care to wait for it.. I don't like doing it as a routine either, but I had to try it.. got 40+ PSI @ 1400.. it's pretty brutal on the drivetrain.

me78569 · March 15, 2016, 11:26:23 AM

Agree'd

There is a point that you ask yourself " do I really want 30 psi at 1400 rpm?" I am trying to get the feel of the truck nice.

I never spend time below 1500, so why should I worry what my PSI is at down there haha? I don't care to load the truck that hard that low in the rpms. much rather work in the range that the cummins is good at making power in.