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Old 08-25-2004, 02:17 AM   #1
Scooby Specialist
Member#: 52123
Join Date: Jan 2004
Chapter/Region: TXIC
Location: Texas
05 WRB STi
04 AW STi GT30R [RIP]

Default 2 Questions dealing with UTEC

mods 04' STi: intake (perrin short ram) bov tbe UTEC

what is max safe boost pressure?

would it be a good idea to go ahead and pick up the "big MAF" perrin intake?
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Old 08-25-2004, 09:07 AM   #2
Scooby Guru
Member#: 32792
Join Date: Feb 2003
Chapter/Region: NESIC
Location: lincoln, ri
2003 GGA MBP
12.9 / 105+


Originally Posted by SupraScooby
would it be a good idea to go ahead and pick up the "big MAF" perrin intake?
not with those mods.

you pick up a bigmaf when you run out of maf headroom. not before, imo.

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Old 08-25-2004, 09:18 AM   #3
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Join Date: Apr 2001
Chapter/Region: MWSOC
Location: in the garage!
2007 R171.473
2009 SWP Spec B


exactly what Ride said, Without EM you will not be able to use the big MAF as it will make your car run very lean. I am running a sr-50 on my sti and a bunch of intake work. I see consistant 4.9v from the maf and on a cool day I might touch 5.0v. I am at the borderline at this point if I run any more boost I will have to get a larger MAF for more head room.

On another note, I am not a big fan of the Perrin MAF as there is not enough piping b4 the MAF to get a smooth flow through the sensor. Also sourcing air from the engine compartment is less than idea. I personally run the APS 65mm intake and have a 70mm standing by for the day I decide to see what the block will handle.
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