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Thread: Tuning your Suby
06-22-2009, 12:01 PM #26
I would never run a short ram intake. Pulling in hot engine air makes little sense if you know anything about turbo compressor flow...
On my WRX I ran a velocity stack to the stock airbox from the fender well, with an opening in the well. On the STi, an APS CAI. IIRC, while cruising the intake air temps at the MAF were virtually ambient temp.
06-22-2009, 05:13 PM #27
I don't think people have been placing enough emphasis on doing the handling mods first. That is the low-hanging fruit in terms of $/driving fun ratio.
20mm+ rear sway is a must, as are replacement endlinks. I have a 99 GF bodystyle, normally aspirated. I stuffed in a 20mm (02-03 WRX sedan) rear sway along with a Kartboy short shift kit and shifter bushings. I recently test drove a new WRX and realized that if I bought the car I would have to do the same mods immediately: once you have gone away from mushy shifter and body roll, it is pretty tough to go back.
Of course, mine is also lifted and skidded, which was great for Montana but is kinda pointless for the big city, unless I decide to go rallycrossing. But I already have plenty of stuff to do with my free time in the summer what with biking and climbing.
06-24-2009, 08:58 AM #28
06-25-2009, 11:25 AM #29
06-25-2009, 12:28 PM #30No longer stuck.
06-25-2009, 07:21 PM #31
06-25-2009, 07:46 PM #32
06-25-2009, 10:17 PM #33
Is there any reason not to go SPT for parts? The shop manager where I bought mine said he'd sell me the SPT cat-back for $350. Paired with a Perrin DP (or about any other), it's a full catted turboback for like $800, or a full catted turboback and a AP for like $1000. Is there any reason not to just do this?
06-25-2009, 11:01 PM #34Best Skier on the Mountain
1992 - 2012
Squaw Valley, USA
06-26-2009, 08:11 AM #35
06-26-2009, 08:27 AM #36
The NA and older ones don't have a turbo, obviously. If you have that, you can go several routes....all several thousand dollars, and lots of labor.
- a bolt on turbo (kit) plus all the supporting mods (engine management, etc). Check the older impreza forums on NASIOC for turbo kits. While not all that invasive, it is a complex mod, and won't be all that cheap, reliable or powerful. It may be possible to use WRX parts instaid of an aftermarket kit.
- My top choice, bang for the buck, is to do a WRX or FXT motor swap (with supporting parts, etc), which should drop in with relatively minor modification and troubleshooting. That way you can use all the standard WRX ECU, and mods. Sounds invasive, but the motors come out pretty easy, new parts more or less bolt up, etc.
(or, do the sane thing - sell your car, and buy an FXT)
- Coolest and most expensive is a full STI swap, including the 6-speed and rear diff......$$$$$$
06-26-2009, 08:47 AM #37