jchaley

Well i finally got my car running again. I did some upgrades while I had it apart. I installed a garret TO4E hybrid (TEC $810.00) and added a maf, and cat bypass. I used the Split second PSC1-3 for the MAF adjustment. After using the PSC1 I cant believe that they still sell the ARC 1 &2 products. I wired the MAF into the stock harness. I also keep the air temperature sensor and wired that in as well. I am using a autothority MAF that I purchased as a MAF only new for $150.00 from technodyne on one of there EBAy auctions. The PSC1 was $235.00, I made my own turbo to MAF pipe and used a K&N cone filter. To tune all of this I purchased a Techedge 1.5 version of the wide band O2.
The PSC1 takes 5 connections. 12V+&-, MAF signal in, signal out and tach. You get a 2D map of RPM and MAF voltage with 800 cells that can be adjusted up or down. You can also log from the controler the incoming signals (MAF voltage, RPM and correction value). each cell is adjustable up or down by .025V.
For the Techedge I am using the o2 input and the tach input (I could also connect in the MAF voltage and a Boost signal if I wanted with the 2 user 5V inputs). I am using the Labview software application to view/log the data on my laptop.
Having the ability to log the data has made tuning very easy. I have both the PSC1 and Techedge hooked to my lap top. I hit log on both and make a couple runs. Then I go home and analize the data.
The data from the Techedge is pulled ito excel and the loged data from the PSC1 is viewed with the R4 software that comes with the PSC1. I use the graphing tools in excel to get a quick picture of the overall A/F ratio then look up the RPM data for the trouble spots. Then I use the log from the R4 software to look up the Same RPM, check the MAF voltage and change the appropriate cell. Then make another run and check again. By doing this the tuning has been easy. It also uncovered some limitations in my current chip/injector setup. I have the output from the PSC1 maxed at 5V but still go lean(12.8) over 5500rpm at 11lbs of boost(europroducts chips, stock injectors). I just ordered some Guru chips, hopfully this will help my problem and if not I will be ordering some bigger injectors.
I have to say that this turbo works great. The boost responce is about the same as my stock K26/6 but it has much more power. The car is faster at 11lbs of boost than at 16lbs with the k26/6. I get full boost by around 3300RPM and it will hold untill redline (i was running at 14lbs untill I saw how lean i was getting at the top end). This turbo is a very nice match for the S2 tranny. Once I get the mixture worked out for higher boost I will go to the dyno and post some results.

john

951porsche

Let me know if you need chip help, I live in colorado springs, and can do some custom chip tuning for you if necessary...

B951S

John
Sounds like a very cool set up. On your version of the Techedge, can it out put a simulated narrow band singnal to feed the stock ECU, as well as the wideband out output for tuning? I was wondering if you welded in a new boss for the wideband and left the stock o2 sensor in place or just ditched the stock sensor and installed the wideband with the car running the ROW maps. THanks

Sean Hall

What turbine housing and trim do you have on your TO4E?
Also, what trim do you have on the compressor housing?

Thanks,

Sean

jchaley

The tech edge 1.5 has the ability to do a simulated narrow band output but I am not using it. I put a second bung in the test pipe about were the cat used to be. I want to use the techedge to tune my other cars as well and so I had no plans to make it a permanent install in the car. Overall it has been one of the better tools I have purchased. If there is a weak link to the techedge it is the software. I am using the labview application and It works fine (cant complaine too much when it was free) but it would be nice to have a time stamp as part of the log as well. If I had a time stamp I could calculate HP, speed in gears etc.

john

jchaley

The turbo I have is a .46 A/R. I am not sure on the exhaust side, it is a custom casting they use made from NI resist. For each A/R they have a quick spool and a high flow. I assume they use 2 different exhaust wheels. you can see there applications here
http://www.turboengineering.com/upgr...port/audi.html

I ended up going with this turbo partly on conversations with Gary Kaklikian. He has the same turbo and was pretty happy with it. You can see a dyno run on his car here
http://www.dynopro.com/mhhr_detail.asp?ID=421

Gary said this run was made at 14Lbs or boost.

If you go to the Mile-high Horsepower rankings there are some interesting cars. Included in the list is one of the Speedvision GT 911GT-3Rs. These GT3Rs are prepped by 3R racing here in denver.

john

pk951

Where did you purchased your'e wide band, and how much did it cost.

do they have a web site for the psci that's a really good price. where can we get one. thanks

pk951

bump,,,,,,,,,,,,,,,,,,,,

Magown

http://www.techedge.com.au

pk951

Thanks Magown i'm still looking for the split second psci-3 unit seems like a fair price, any info out there.

crazyracer

Where did you buy the PSC1? The splitsec webpage shows USD 338 for the 004.

pk951

crazyracer

do you have split-second web page? thanks

Sean Hall

http://www.splitsec.com/

pk951

Thanks Sean Hall

jchaley

I did not use the PSC1-4 I used the PSC1-3. Both units due functionally the same thing, however the 04 ads a input for temp sensor (but no output). I wired the temp sensor directly into the DME as it uses temp information for several things. So far in testing I did not see any appreciable difference between A/F readings on a 93deg. day vs a 40deg morning so I think the compensation in the DME is more than adequate and the compensation does not need to be done in the PSC1. I also re checked the turbo part number I purchased.
I check the information on my invoice on the turbo, the part number 103-153548K is listed as HIGH FLOW and TEC list the turbo as good for 430HP. I got the 360deg. thrust bearing and the price was $806.00 plus tax.

john