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Old 02-05-2006, 10:51 AM   #1
overdose
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Default topend boost on sti?

is it possible to hold more than ~15.0psi to redline on the VF39 or would you even want to try to?
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Old 02-05-2006, 11:12 AM   #2
innova
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Yes. I hold over 18psi to redline with a AccessPort PDX tune in 4th 5th and 6th.
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Old 02-05-2006, 01:54 PM   #3
R4ND0M_AX3
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Quote:
Originally Posted by innova
Yes. I hold over 18psi to redline with a AccessPort PDX tune in 4th 5th and 6th.
What do your EGT #'s look like?
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Old 02-05-2006, 02:24 PM   #4
KAX
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I beleive the 39 can hold 20 to redline, but maybe it was 18. A friend with alky injection is doing it.
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Old 02-05-2006, 02:32 PM   #5
innova
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Quote:
Originally Posted by R4ND0M_AX3
What do your EGT #'s look like?

I couldn't tell ya. I hope to be installing an EGT gauge soon and take it easy until then.

It's a 3" catless turboback so I'm hoping they aren't too high.
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Old 02-06-2006, 11:26 AM   #6
bigmike25rs
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You could force it to hold over 20psi, but the efficiency of the turbo is long gone. That's gonna be some HOT air. It will make close to 20psi in the powerband, but it's not a topend turbo. I would also like to see some logs of a VF39 @ 21psi @ 6500prm.
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Old 02-06-2006, 12:41 PM   #7
Freon
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I can get pretty much whatever boost I want, especially with a new interrupt BCS. I haven't seen or tried more than 16.5 @ 6500, though. I run about 15.5 now @ 6500, maybe I'll crank it once I get my EGT in.
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