ibkevin

Here are a few screen shots of my road trip yesterday.

I think this demonstrates the need for a 1bar WG spring because my Profec is set to 17lbs. I've done a search on the 1bar vs. 0.8bar springs and most concluded the "butt dyno" didn't notice much, Danno's writeup was excellent (as usual) which has me thinking a 1bar is in order.

Suggestions?

Looks like I have a moddified "User" access now, I don't get the manage attachments panel.

ibkevin

This is a damn shame.

xsboost90

i supposedly have a 1 bar spring and it works fine. wheres the pics?

ibkevin

Presto...

333pg333

Are you saying that the strength of the spring is inhibiting you from using certain functions of your Zt2? I'm confused about that. I am going to need to understand this soon as I'm about to have it installed in my car within the next couple of weeks. I'll do a search and check out Danno's article along with Tom's writeup.

ibkevin

The WG spring has the untimate control over boost, and the zt2 indicates that I'm not effenciently using my to4e.

I actually think I'd go with a 1.2bar spring.

This may help.

Tom M'Guinn

Why is the rpm line nearly flat in all shots?

Perry 951

Do you have a boost gauge to verify the input? Maybe it is 17PSI? How about the TPS, looks like 55% throttle is your peak. Scale may need to be adjusted on it.

I spent a lot of time working on my WBO2 tables to match my inputs. Lots of work with a DVM. I've offset .25V on some channels. That can easily be a few PSI on a 0-5V sensor.

ibkevin

This file is an hour and a half's worth of "scoot" to LA Saturday morning and I was primarily looking for peak boost results. I'll go through it more to find some dramatic conditions. It really is a nice drive though!

ibkevin

Thanks Perry, so you are suggesting to do a "hardware calibration" to match the zt2 sensor to the moments barometric pressure?

I'll check it now.

333pg333

What are those jumps mid way along both the Lambda and the a/f's? Also why are they the same waveform as each other, and why are the Boost, tps, and user the same as each other.
Seems like there's a fair bit of stuff to do to get these things working properly. I've just spent a small fortune on a totally optioned system inc. the alarm button/buzzer for race applications. Using search function and reading all the recent posts (back to 2005) and there seem to be a few issues that are encountered. I like the idea of running it in tandem with the SMT6. Any links to how this is done...ST.

ibkevin

Yes, I believe this demonstrates the safety margin of the VR II chipboard and has reminded me to send my chipboard in for the latest revisions, this is an early c/b.

Once the revisions are loaded I will have new FQS settings to help tailor the DME, only then will consider a piggy back.

As I've said, I scanned the file for max boost conditions only, maybe that's why the boost and tps are so similar.

Perry 951

Not sure how the ZT2 uses tables, but there should be a file that is liner or point based to reflect the sensor's output. Since several sensors can be used, I'd assume some sort of table is availible to modify.

For demonstration purposes:

Liner
0V = 0PSI
5V = 14.7PSI

Point Based
0V = 0PSI
.25V = 2PSI
1.25V = 5.5PSI
3V = 8.57PSI
4V = 11PSI
5V = 14.7PSI

Using the point based map, you can refine the output curve of the sensor if it is not linear.

Here is the data sheet for the sensor I use. You can see that it is linear, for the most part. The offset for me was static voltage that I had to "write out". In essence, 1V = 60KPA, so I needed to adjust to say 1.25V = 60KPA as I had .25V floatinig.

Hope this makes sense.

http://www.freescale.com/files/senso...50A.pdf?srch=1