Turbo on a 2.5?
03-31-2004, 05:55 PM
#47
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Car Info: 1993/2000/2001 GF4 mostly red
I agree, but unfortunately Ludespeed is no longer producing Subaru kits. All that's left is FAT and AVO, and there are often used Vishnu and Ludespeed kits available.
06-26-2004, 07:21 AM
#50
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One thing your missing- the block- I don't know about RS's but many Normally asperated 2.2's have an open deck block. Will that hold to 6psi, yeah, but if you want to go much above that you will either need a new block, or to have your block closed/semi-closed. That pretty much involves having a plate welded into the water jackets in the top of the block to give it more strength(Paeco has these, as well as many other nice bits for subarus, ask carl for a catalog it's way better than the website). Also the strength of the heads is more the issue than the airflow most times. Your car has higher compression ratios than a turbo car, which means by running a turbo you will auctially end up with higher compression than a normal turbo car, your heads will -probibaly- be able to flow the air if you tune them, but the compression could still crack the heads. Now I am under the impression that WRX heads will bolt on the 2.5 and they are stronger than the N/A heads, that also may be a way to go.
Just some things to think about.....
Just some things to think about.....
07-19-2004, 04:03 PM
#51
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hi I was thinking about doing that but it is 4g's for an average turbo and a japanese spec ej20 is 2 1/2 g's and seeing as you will destroy the enjin any way it would be cheeper to get the whole thing all at once. a j spec ej20 has stoke 280 hourse. you should check out www.finelineimports.net they doing my swap. good luck
12-27-2004, 07:43 PM
#52
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turbo 2.5rs
I am running a wrx turbo on my rs and it is the most beautiful thing in the world. Full spool at 2500 rpm. still have a crapload of torque. of course mine was a custom kit. I used the 92 or 93 turbo legacy cross member. wrx turbo, flanges off of upipe and downpipe. and wrx manifold. and i have a vortech 8 to 1 fmu. a missing link to block the map from seeing boost. i changed the stock leaky headgaskets from .040 thick to .055 thick to drop compression a bit. in the tank i have a wlbro 255 lph. car runs beautifully. the only bad thing is i chunked my transmission last night, the lucky 2nd gear. If your going to turbo it be ready to drop some ra gears or some other option for transmission in. Got about 20,000 out of transmission with turbo before it took a crap. goodluck. Derek
12-27-2004, 08:07 PM
#53
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If you're gonna run an RS-T, that's the right way to go about it mechanically. When you've got the transmission replaced, I would look into getting a good standalone like a Hydra or Haltech. Good luck.
12-29-2004, 09:09 PM
#56
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i was planning on doing a unichip and i was told it would work so i bought one for 25 bucks used. i talked to fis and they said it wouldnt work, so i keep an eye on my a/f gauge to make sure that i am not running lean, in fact i am a lil rich right now. when i have the money after this tranny rebuild im building the motor pistons, crank, cams, springs, all the good stuff trying to put like 400 down. when i do that im gonna look at a link or haltek or something.
sams by the way your 99 rs would turbo just as easy as mine but u have a mass air flow sensor and i have a map sensor. not sure how to go about that. by the way the max on the motor is 7 psi. i run 7-10 psi depending on the gear due to the headgaskets i bought giving a little leanency, even if she blows ill just build her bigger and better than before. goodluck to all of those who dream of a turbo rs, its a beautiful thing lots of highway with crap loads of low end torque.
Derek
sams by the way your 99 rs would turbo just as easy as mine but u have a mass air flow sensor and i have a map sensor. not sure how to go about that. by the way the max on the motor is 7 psi. i run 7-10 psi depending on the gear due to the headgaskets i bought giving a little leanency, even if she blows ill just build her bigger and better than before. goodluck to all of those who dream of a turbo rs, its a beautiful thing lots of highway with crap loads of low end torque.
Derek
04-19-2005, 01:19 AM
#57
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Join Date: Feb 2005
Location: Calgary, Canada
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Car Info: 01 2.5rs
from the sounds of previous posts, turboing an RS is either risky, or costly. I have a 01 RS and was wondering what to do to make it faster, other than blowing it up in 10000 ks with a turbo kit.
what would be the best cost effective way of adding speed without turbo??
not advanced in the tuning world.
what would be the best cost effective way of adding speed without turbo??
not advanced in the tuning world.
04-19-2005, 12:26 PM
#58
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The only significant power increase without a turbo comes from cams and a higher redine, and doing those requires pulling the motor, and engine management for the redline and proper tuning. It's not a whole lot cheaper. The cheapest way to make your RS fast is to trade it for a wRX.