Question about LS3 E38 Custom 2 Bar OS upgrade

[Iam Broke]

So... someone told me today that the VE table would be all zero's on the custom 2 Bar OS as I load it. (if I understood, I'm old & slow)

Where do I start on the data for the real VE table when I pull the trigger?

LS3, E38, TVS2300 9+ psi, stepped headers, no cats full 3" from the headers back.

I searched the repository for clues, but no joy.

I tuned SD on an LS1 a few years ago but I need someplace to start I guess.

[c.u]

Hear you go.wacth the demo then use the file. http://files.hptuners.com/support/De...alkthrough.swf

[10_SS]

Here's a 2010 E38 LS3 for a Whipple 9psi with Whipple injectors BUT slightly modified injector settings, it was good, a little rich in most places. I've been playing with it a bit, but not much so it may "appear" not smooth.

It will definitely get you running, or something is wrong with the injector settings.

Stock motor, stock exhaust, etc. Whipple supplied injectors with slightly tweaked injector settings along with a "safer" throttle opening rate setting that everyone with a whipple+manual trans LS3 E38 should have since the stock whipple tune runs lean at tip in between shifts (but not many people seem to care).

Also fixed is the ~15F difference in Whipple IAT vs. actual IAT temp (verified many times on a room temp ~40F and 75F engine). Still waiting to hear back from Whipple on that as well. Not may people seem to care about that either.

FYI - the Whipple manifold dramatically changed my VE table, as I converted my VE table from a stock LS3 2010 Camaro E38 using the EQ program, and it's not an ideal smooth VE table, but then again, a Whipple intake is far from "ideal" as there are no runners compared to the stock intake... just a big fan... a radiator, and the intake ports.

[Iam Broke]

Thanks for the info, I will look into this EQ program as well.

[4evervette]

If u have good MAF tune ... U still can work from there to build ur VE table...

[Iam Broke]

I have the MAF pretty well spot on. WB & fuel trims are +/- 1-2%. I keep the fuel trims slightly neg to keep them out of the PE.

[4evervette]

Then u can set up ur VE tables in the scanner and plot ur GMVE values...if u have nice loaded dyno then u can fill almost the whole tables...

[Iam Broke]

I understand how to tune the VE tables, thanks. Since the E38 uses the virtual thing and I want to convert to a real one when I upgrade the OS to the custom 2 bar I need a place to start. Looks like the EQ <> VE program will do what I need.

Thanks again.

[4evervette]

If u upgrade to 2.5 Bar u don't need the EQ-VE Program

[07MontRedcp]

If u upgrade to 2.5 Bar u don't need the EQ-VE Program

You can use it to convert the virtual VE equations to a baseline VE table and tune from there, so why not. The custom OS is just a blank table.

BJK

[4evervette]

You can use it to convert the virtual VE equations to a baseline VE table and tune from there, so why not. The custom OS is just a blank table.

BJK

That's correct ...ifHe starting from complete new tune ...if he is running maf tune ... His SD Coffients are stock and he have to re do them.... Where my point is he can do some data logging using his maf tune to generate the GMVE vaule and use them in the empty VE custom OS ....
Absolutely nothing wrong of either using 2005 VE TABLE ..or blue cat program... Am just pointing to another way of doing the same thing ...that's all ..

[Iam Broke]

Thanks guys. I played with the EQ program last night, while the SLP base file I started with uses the MAF above 900 rpm, I want to have some VE values in the table when I start logging.

Converted a tune this morning to the 2 bar OS & got my MAP sensor data in there. Played some with the EQ <> VE stuff to get a feel for it. Hoping to get the table built today if it's slow at work.

looks like the 2 bar OS for my E38 is really 1.75 out of the box and I have a 2.5 bar MAP sensor but I never boost much over ~9 psi anyway (150kPa absolute). Got the fan settings moved over also. Lots to compare between my tune & the Custom OS to see what moves over and what doesn't.

[DSteck]

Just edit the axis labels. If you aren't boosting very high, give yourself greater resolution.

[Iam Broke]

Well, I tried several times to generate a meaningful table with strange results. Some areas are negative and when I paste the tables in I get zeros there. See below.

Must be screwing something up.

[Bill@HPTuners]

min ve value allowed is 0 hence the reason negative values go to 0.

[Iam Broke]

Wasn't expecting any values that low I guess, understand the table limits though.

[Bill@HPTuners]

Yeah I don't understand that either. I've always just recommended using an E40 Corvette/GTO Ve table as a solid starting point.

[Iam Broke]

Thanks, I'll search the repository or use the one 10 SS posted.

[c.u]

No need to look just use the VE table from the file i posted. Then like the demo shows fill in the blanks.

[Iam Broke]

Ok, I took the '06 tune from c.u.& the '10 tune posted frm 10 SS & used the '06 for up to 105 kPa & interpolated the gaps, then pasted in the VE from 10 SS for the areas 110kPa and above with some more interpolation. Looks too perfect, but it should give me a starting point at any rate.

Now I have to wait for some good weather. Thanks to all.