hodge9386

There is plenty of write ups for gen 3 stuff but I would like to learn more about the gen 4 suff but it looks completely different. Iv googled and googled and cant find anything. Anybody have any writeups or how to for the gen 4 stuff?

spy2520

I'm in the same boat. Comfortable with the LS1 pcm but this E38 seems alot more complex.

erick_e

HP tuners has a dedicated forum for Gen IV, and EFILive also has a forums dedicated to their software.

A lot of CF members belong to the HP forums as well, and I've learned a lot about tuning from those forums.

sevinn

Most everything carries over honestly. You can learn alot by looking at the gen3 stuff, although there are some differences but the HP Tuners forums are a really good resource for info.

However, take a look at this site http://www.masterenginetuner.com/projects.html...especially at the z06 stuff. He goes pretty in depth about what all is going on. The biggest change will be VE tuning, but if you get the HP Tuners beta (assuming you're using HP Tuners that is) you can tune with a VE table that's built right into the software...and I think EFI Live also has a virtual VE table built in as well. You have a head start if you already know how to use the scanner...so I think you'll be alright.

russ472

I have HP tuners and am currently doing a One on one online course with Ed Mowton. He is a forum member.
I have the Greg Banish DVD and books, but being a beginner, it was way too much information all at once. I tend to learn better being walked through the process. Other members have helped out, but I really want to be able to do this on my own.

Give his site a look over. http://www.ermperformancetuning.com

schpenxel

Most everything carries over. Idle control strategy is different without the IAC.. IMO it's easier on gen 4's

The other "weird" thing you'll find on E38's is virtual VE instead of a regular VE table. Request access to the 2.25 beta and it comes with an editor built in to edit VE table. It basically uses equations instead of a regular 'ol table, and you can't edit these by hand. The beta 2.25 has an editor built in that makes it easy to edit these values

"VE" values will be weird at first.. instead of the normal 0-100% they some other values already factored in, so you'll find the VE table values in the 2000-3000+ range type numbers. Works the same.. just looks weird at first.

HPT forum has a decent amount of people there if you have a specific question or problem.

hodge9386

I have hp tuners and am familiar with the gen 3 stuff, i have tuned several gen 3 vehicles including my c5 with a big cam. I also have 2.25 beta and seen the tables under the speed density section but I was at a loss as how to use them.

schpenxel

Go to edit--> volumetric efficiency editor. Change what you want and hit calculate coefficients and it will update the tables in SD section as best it can.

You can change the axis headers by clicking on them. So you can change to 1 bar, 2 bar, 3 bar, etc without a custom OS

mvvette97

I have EFI live and have been tuning gen 3 for years. I just started doing some tuning on my 07. Really to me it doesn't seem much different. Some things yes but overall it's about the same I think. One big thing is the fan settings. Rather than just setting the temps for the on and off of the fans you must set the percent of power to the fans at a given temp. Takes a little messing with but it's not that bad

SMOKINV8

You have to have one of the latest Beta's to use the VE editor schpenxel is talking about.

hodge9386

I seen the virtual ve thing but what does manifold pressure on and off mean?

schpenxel

Just make them all the same. Only one of the two is actually used but I can't remember which is which so I just set them both the same

It's for some of the truck engines that have some kind of manifold switch. Isn't used on Corvettes.

hodge9386

so how do i put it into sd mode?

then i can tune the ve the put the maf back in and tune the maf just like gen 3 stuff?

schpenxel

For VE tuning disable MAF by setting airflow high freq fail to 1hz then tune VE

For MAF tuning disable SD by setting dynamic airflow disable to something low like 100 RPM's then tune MAF (set the high freq fail back to stock first obviously)

Set all of this back to stock to go back to mixed mode

Or leave it with one or the other depending on how much time you want to spend on it and the results you get with each

hodge9386

hmm. sounds easy enough lol. ill give it a try. thanks guys

Mike 92LX

Disregard nm

Tropicana

Not sure if it matters but I just got an email from HP Tuners announcing their long-awaited v3 software: http://www.hptuners.com/forum/showth...s-Finally-Here

schpenxel

Beta just went public as "v3" it looks like

Everyone will hate the scanner at first more than likely, but it grew on me. It logs way faster than the old version did which is nice on E40's especially. Serial wideband support, unlimited number of histograms, well done math parameters (user defined PID's), etc.

sevinn

Yep I agree on all accounts.

For the record, if you use a laptop or tablet hybrid and it rotates mid log it will quit logging without crashing. I was in the middle of tuning VE for wot when I found that out . I since disabled rotation on my surface lol

schpenxel

Might want to report that on the HPT forum to see if they can work around that