Bill00Formula

iTrader: (4)

At one point I saw a VE calibration worksheet.

It was formula driven, so you plug in what you have logged and it fills in the table based on expected values.

Does anyone have one or know where I can find it.

Thanks

JakeFusion

iTrader: (7)

Dave Steck had one for the MAF curve based on third order polynomials.

eaglegoat

I've checked it out in the past. It's very roughly estimates a table that wouldn't be suitable for driving. It's not really even an in the ballpark thing. Closer to an in the same city thing.

statesman

The MAF curve does follow a third order polynomial. People who end up with a MAF curve all bent out of shape usually are not filtering transients properly, if at all. Also, the MAF isn't very forgiving to bad injector data... if the injector data is really bad, the MAF will become virtually impossible to tune.

The VE table can be calculated from the MAF, but it's only going to end up as good as the bias table lets it. You also have the problem in HPTuners of having to calculate the bias and GM filters the bias so your calculation is not really going to match the PCM calculated value unless you're in steady ECTs and IATs for a reasonably long time. EFILive users can log DAT and do a better VE calculation.

JakeFusion

iTrader: (7)

This is true.

I've been trying to get HPT to do the MAF>VE population as a first cut to save time. But it hates it.

Time to switch over to EFI Live anyway. Diesel support is better and that's like most tunes nowadays.

joecar

Hi Bill,

It's been a while, but if you still have your EFILive, we have some calc pids that calculate the VE table from the MAF table (and vice-versa depending on which OS/PCM you're running).

eaglegoat

With the Gen 3 PCMs it's easier to go VE>MAF. HpTuners doesn't support MAT as a scannable parameter for the Gen 3 stuff. MAF calculations don't require MAT.
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Bill00Formula

iTrader: (4)

Hi Joe,

Hope all is well. I do still have EFI Live. I thought the spreadsheet would be good to fill in those areas that no data was obtained as well as adjust the data you did get to fit the normal trends in the VE table. I don't know how sophisticated or accurate it was but it looked like it could be pretty good. I had it saved in on my computer but I had some issues with my computer so it seems like I lost it.

Thanks, I'll have to see if I can find those PIDs.

Looks like I'll need to get HP tuners since EFI isn't working on some of the tables for the newer cars. At least that's what I've read.