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Old 05-20-2003, 07:42 PM   #1
Zola
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Default TXS Stage 4 map with stock TMIC

If you look at this page on the TurboXS website, you find several maps at the bottom of the page that can be uploaded to a UTEC.

The descriptions make it look like there are separate maps for Stage 4 and Stage 4 w/ the TXS TMIC. But the hyperlinks lead you to the same file (stg4tmia.txt) in each case.

Were these different maps at some point in the past? And does anyone have a copy of one for a stock TMIC?

In more general terms...once I get my hands on a Stage 4 map, I'm going to modify it because I have a VF23, not a VF30. Since I won't be flowing as much air, would it be prudent to carefully reduce fueling at certain places in the map?

Final question--I still have the stock downpipe and midpipe, so does this fact require any map tweaking (less boost, more fuel, whatever)? I realize that I should get a downpipe, so you needn't remind me. Unemployment only allows for so much modding at a time.

Joel
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Old 05-20-2003, 08:27 PM   #2
ndw1138
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Default Re: TXS Stage 4 map with stock TMIC

Quote:
Originally posted by Zola Rex
If you look at this page on the TurboXS website, you find several maps at the bottom of the page that can be uploaded to a UTEC.

The descriptions make it look like there are separate maps for Stage 4 and Stage 4 w/ the TXS TMIC. But the hyperlinks lead you to the same file (stg4tmia.txt) in each case.

Were these different maps at some point in the past? And does anyone have a copy of one for a stock TMIC?

In more general terms...once I get my hands on a Stage 4 map, I'm going to modify it because I have a VF23, not a VF30. Since I won't be flowing as much air, would it be prudent to carefully reduce fueling at certain places in the map?

Final question--I still have the stock downpipe and midpipe, so does this fact require any map tweaking (less boost, more fuel, whatever)? I realize that I should get a downpipe, so you needn't remind me. Unemployment only allows for so much modding at a time.

Joel
What octane are you running btw? Reason I ask is I ran a stage 4 map with stock pipes post turbo (catless uppipe, but no turbo back). I had to reduce boost, reduce timing, and add fuel, it ran rough and hot. Timing was the greatest change for me, followed by boost then fuel. You are not running a stage 4 setup, your a bit off actually.. Those 2 components (turbo back and larger intercooler) play a pretty large roll in performance and continued performance. For me with just minus a turbo back (for about 2-3 weeks) it was so much different my knock free maps looked nothing like the stock stage 4 maps.

My guess is stage 4 base map on 93 octane is going to be too much for your setup. I personally would start by making a closed loop stage 4 map and starting very low with my boost numbers with the ABC closed or 1/4 turn open (maybe 200 or 225 after 3Krpms).. This is assuming you are near sea level of course. See if you can first run that cleanly (without knocks or timing being pulled).. Then slowly build those numbers up. I run 18psi at 265 with ABC completely closed to give you an idea (VF34).

Really need to get yourself a larger intercooler, but the turbo back will yield better performance and make everything more efficent - I was honestly surprised how much difference.. If you run 16+psi with the stock scoop and intercooler it gets hot quick, and if you stop (like at a stop light) it gets very hot very quick.

nathan
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Old 05-20-2003, 08:34 PM   #3
Zola
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Default

Thanks for the feedback Nathan. I will probably be limited to 92 octane most of the time, unfortunately...there are places around here that have 93, but they are pretty far afield.
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Old 05-20-2003, 08:46 PM   #4
ndw1138
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Quote:
Originally posted by Zola Rex
Thanks for the feedback Nathan. I will probably be limited to 92 octane most of the time, unfortunately...there are places around here that have 93, but they are pretty far afield.
Then you are going to have even more problems to start with. I tried and tried to get my stage 4 working with 91 octane.. Perhaps 92 wont be the same beast as 91..

I am currently mixing a few gallons (2-3) of 100 octane to get my stage 4 working without knock. Looks like I have that working in weather ranging from wet 40F to dry 95F..

I would be willing to bet, that smart thing to do is indeed create a closed loop map start with low boost numbers, drop 1 degree of timing post 1K rpms. I would also sugest going into the 60% load colums for timing. Then do some data logging. Slowly increase those boost numbers and see where you end up.

Sorry that's about as much help as I can offer without some logs and such. If you want help with a map like above email me

nathan
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Old 05-21-2003, 03:01 PM   #5
roybfr
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Default

The two maps are indeed the same and ASFAIK they always have been. I ran the map mostly untouched with the stock I/C from Oct to April on 92 with no problems except when it was below 20deg, then I had to remove a little bit of timing in hte 3750-5000 range. IMO the base map works better for the stock I/C then and upgraded one.

Since installing the TXS TMIC last month I have had to make quite a few changes. The biggest one was coping timing down into the 30-60 load zones, and making a few tweakes here and there in the 30, 70, 80 and 90 load zones (had to remove 1 deg of timing in a few places and smooth it out). All good now, running 17.5 - 18. psi.

Also the base map is using open loop boost mode and I would highly recoment switching over to closed loop, though that will require changing all the values in the boost map, but that it not really to big of a deal.

If the VF23 comes on a little quicker then the VF30 you may need to shift some of the timing in the 3000-4500 where it dips down as boost comes on. This tends to be the most sesative place for knock.
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