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Old 03-30-2004, 10:42 PM   #1
Pedestrian
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Default VF22/VF34: Safe without tune/intercooler?

How safe would I be putting on a vf22, with supporting fuel mods, and a UTEC left on the regular untuned stage four map be without an aftermarket intercooler. In my quest to save money, I would put those on first, and get a bigger intercooler later on. Will I make more power with a vf22 on an untuned stage four than a vf34 on the untuned stage four?

Thanks in advance,
Ben
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Old 03-30-2004, 11:22 PM   #2
MustGoFast
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the stock intercooler doesn't make it unsafe, the base stage 4 map is for that stock TMIC, the bigger TMIC adds power to it, and the FMIC map is different.. all these maps are designed to be rich (ie safe)... the bigger turbo will make more power but you hsould know the stage 4 map is not made for a VF22 so I would not recommend running it for long w/ out a tune as it may not be safe at all on that map.
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Old 03-31-2004, 12:57 AM   #3
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At least get some sort of boost conrol, even a manual cheapie for insurance.

Bryan
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Old 03-31-2004, 11:19 AM   #4
Eli
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Unless TXS have changed it the base stage 4 map was designed for an aftermarket TMIC. THe stage 3 was also designed for a larger TMIC. You will probably need to keep your boost settings relatively low because the intercooler will not be able to keep up with the heat the turbo is making as it runs out on its efficiencey map. I wouldnt reccomend running much more then 14 psi or so (remember its all about flow not psi) and you will be flowing more then the stock turbo but not overwelhming the intercooler. Youll know when you are because you'll have a hard time tuning out the knock.

Eli
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Old 03-31-2004, 11:33 AM   #5
WRXMikeH
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Wrong... http://www.turboxs.com/utecstg4.htm

The base Stg4 has always been with the stock IC as long as I can remember. But...it is configured to use the VF30/34, not the 22, so be careful.
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Old 03-31-2004, 11:57 AM   #6
Eli
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My bad. But could someone explain to me why when you go from a stage 3 to a stage 4 you lose the TXS TMIC??? The stage 3 is definitely designed for the larger IC. Oh well...shows you what happens when you assume things.

Eli
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Old 03-31-2004, 12:01 PM   #7
WRXMikeH
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I believe that's because there once was only Stage 1, 2, and 4. Stage 3 was added in there at the same time as Stage 4 + TMI.
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Old 03-31-2004, 01:19 PM   #8
SupaSizeFries
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I've been running with stock TMIC for a couple of months without any problems on stage IV (vf34).

Last edited by SupaSizeFries; 03-31-2004 at 04:42 PM.
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