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Old 10-05-2005, 08:16 PM   #1
2.5 Blue Roo
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Default Help/Advice Turboing 99RS w/ custom turbo kit from a 91 Legacy

i have a 99 rs
im pieceing together a turbo kit from a 91 turbo legacy and imt rying to get opinions/as much help as i can get

i want to run 4-5lbs of boost

My kit will include:

91 turbo legacy headers, upipe
91 turbo legacy x member
wrx downpipe
turbo from the 91 legacy
RRFPR
wrx fuel pump
wrx topmount intercooler/bov
SAFC
J&S safegaurd (if i can find one)
colder spark plugs


now ive been told that 99's take boost better than 00+

also, ive been told i can get away with just having a RRFPR and colder plugs

do i need bigger injectors for this setup?

also, what ratio RRFPR should i be looking to get?

also, for the turbo, where can I get an 5psi internal wastegate? i think the turbo from the legacy's wastegate is set at around 8 or higher

which coolant lines should I tap for the turbo?

im planning on T'ing the stock oil pressure sending unit for oil
and im contemplating using tapping the oil pan for a return line or using the ej22t valve cover (apparently it has an oil return spot)

next question, will the ej22t valve cover fit onto MY99 ej25 SOHC?

anything i missed?

Basicly i want to have a somewhat reliable faster car haha

any advice/ criticism is welcome
ive been browsin the AFI forum for years now and have finially decided to act just becuase i actually have the parts close at hand now, i still dont know everything so any help i can get is welcome

also ill have everything i need from a 91 legacy (basicly a parts car, only thing is i dont get the block)
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Old 10-05-2005, 08:44 PM   #2
Hitokiri
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Quote:
Originally Posted by 2.5 Blue Roo
now ive been told that 99's take boost better than 00+
they do, but you still have to be smart about it

Quote:
Originally Posted by 2.5 Blue Roo
also, ive been told i can get away with just having a RRFPR and colder plugs
I won't have told you that. I would say you need at least some sort of piggyback. I vote Greddy Emanage - It costs about as much as an SAFC and does 500% as much.

Quote:
Originally Posted by 2.5 Blue Roo
do i need bigger injectors for this setup?
I would say yes. Get WRX stock injectors and an Emanage and you will be golden up to about 8-psi fuel wise.
Quote:
Originally Posted by 2.5 Blue Roo
also, what ratio RRFPR should i be looking to get?
well you shouldn't even be looking for one

Quote:
Originally Posted by 2.5 Blue Roo
also, for the turbo, where can I get an 5psi internal wastegate? i think the turbo from the legacy's wastegate is set at around 8 or higher
You are going to have to live with the wastegate on the turbo for the most part.

Quote:
Originally Posted by 2.5 Blue Roo
which coolant lines should I tap for the turbo?
tap the lines going into and coming out of the heater core. IE between the firewall and the engine.

Quote:
Originally Posted by 2.5 Blue Roo
im planning on T'ing the stock oil pressure sending unit for oil
and im contemplating using tapping the oil pan for a return line or using the ej22t valve cover (apparently it has an oil return spot)
You should be using the oil gally plug on the top of the block. There is a free one there and that is where pretty much all turbo setups around here get oil.

Quote:
Originally Posted by 2.5 Blue Roo
next question, will the ej22t valve cover fit onto MY99 ej25 SOHC?
no way will it ever fit.

Quote:
Originally Posted by 2.5 Blue Roo
anything i missed?
-oil lines and preferable a WRX oil pan with a return bung for you oil line for it.
-you will need so recirculate the WRX BPV air back to the intake just like a stock wrx does. So you will need to figure that out when you design your intake.
-you are going to need someone to tune the car. So ask around.
-If you plan on having the car be reliable and have confidence in it you are going to need some sort of knock detection feedback gauge. Whether its a TurboXS knocklite or a J&S safeguard w/ monitor or a TXS Tuna, thats up to you.
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Old 10-05-2005, 10:41 PM   #3
2.5 Blue Roo
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so i dont need a RRFPR?
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Old 10-05-2005, 11:36 PM   #4
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A rrfpr is only neccessary if you do not have something managing fuel. ie EM. Usually.
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Old 10-06-2005, 12:23 AM   #5
2.5 Blue Roo
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ahh okay
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Old 10-06-2005, 01:52 AM   #6
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the rrfpr raises fuel pressure dependent upon boost. So when you are on boost, the fuel pressure raises, your injectors flow more simply because the fuel pressure is higher. EM can/should take care of this with stock fuel pressure.

However, when you are running a low boost scenerio, the rrfpr is a very good solution.
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Old 10-06-2005, 08:32 AM   #7
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Yes EM/Bigger Injectors is the way to go with a turbo setup. I've heard of dozens of stories of failed/died RRFPRs and the control you have with EM/Injectors is exactly what you need for this kind of setup. I also vote for emanage it is 10 times better than SAFC and if you have the timing conservative you shouldn't need a J&S Safegaurd. I've used emanage on my turbo setup for 6 months but now I'm moving to a full standalone ECU (I'm selling my emanage setup in the near future so PM me if your intrested).

also, for the turbo, where can I get an 5psi internal wastegate? i think the turbo from the legacy's wastegate is set at around 8 or higher
I'm not entirely sure about the legacy wastegate but if it is anything like the WRX TD04 (which is interchangable with the legacy turbo) there is an adjustable nut at the bottom fo the wastegate and you simply play with the length of that nut until you get desired boost. However, running at least the TD04 this way there is a limit to how low you can run the boost I couldn't get it to go below 6psi. (I have a spare TD04 actually in the garage if your intrested PM me)
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Old 10-06-2005, 08:35 AM   #8
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I would offer some basemaps for a 99RS w/ WRX injectors / WRX pump / 2.5 TBE for emanage blue or emanage ultimate if you go that route.
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Old 10-06-2005, 09:23 AM   #9
2.5 Blue Roo
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now if i go Greddy emanage, does that come with all the necessary connectors/plugs or is that all extra?
thanks guys, i really appreciate the help

btw hitokiri, i saw you had a greddy emanage for sale, do you happen to still have it?
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Old 10-06-2005, 10:06 AM   #10
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ok for the greddy this is what your going to need, igintion harnees, injection harness , map sensor and map senor harness. that is what i used on my turbo project. i have the same turbo as u and im only running 5 psi cause my wastegate is damaged and is opening soon, u will also need a wrx/turbo legacy water pump, so the timing belt should be changed when u do that. recirulating the bov is a major factor. my hose ripped and the car would die till the hose was replaced. what i did for oil was tap off the oil pressure sendor, and tapped the oil pan. now if u tap the oil pan i would suggest removing it cause on the inside there is baffles that you will hit when drilling. expect some road bumps there cause it is a pain in the a$$. i didnt run coolant lines for the turbo. the turbo does get hot but oin my friends m3 all they use is oil so that is all i did. also may i suggest an oil cooler to help the motor. got one from boxer4racing. it was an easy install and costs like 120 bucks. here is a link of my car if you wanta see it http://www.cardomain.com/ride/861819 . also feel free to pm me with any other questions. also im running sti yellow tops cause u need a top feed injector, a crushed fpr and walbro, rather be to rich then lean out at any point.

good luck

-matt
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Old 10-07-2005, 07:03 PM   #11
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Quote:
Originally Posted by 2.5 Blue Roo
...also, ive been told i can get away with just having a RRFPR and colder plugs....
Hi,
I told you that on RS25, with the addition of a fuel pump. Though I did qualify that by saying it would be fine IF you never spike or creep with a 5 PSI wastegate actuator- that is the challenge- not creeping or spiking.

BTW, you don't need or wan't bigger injectors unless you have aftermarket EM. Bigger injectors with stock EM will make you run rich off boost. Good luck!
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Old 10-07-2005, 09:24 PM   #12
2.5 Blue Roo
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ahh okay, so your ampasuarus? cool cool im stil trying to figure out what im going to do, it really depends on what I can find as of now, i really appreciate the help everyone hopefuly i can get my act together now to start collecting essential parts
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Old 10-08-2005, 02:49 PM   #13
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Blue Roo.... with a 99, you can easily boost 12 psi... I've seen 16 psi (WRC 555), and he is local, however, non of that RRFPR, or piggybacks (not a fan)... I would get a Link PLus Plug-n-Play for the RS. Its should be fairly easy to find one used in the forums, and they are worth every penny. WRC555 tuned my car in 30 minutes. The car runs better than stock... Im even getting 27-30mpg on the Hwy... can't beat that... Im running only 8 psi.. but I'm being conservative for an 01.

If you have questions let me know... Im in the rockville area..
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Old 10-10-2005, 10:05 PM   #14
2.5 Blue Roo
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k so ive decided what im going to be running and ive already started collecting parts

my proposed setup as of now

91 turbo legacy headers, upipe
91 turbo legacy x member
wrx downpipe
VF-11 turbo from the 91 legacy (stock wastegate is 6psi which is what i wanted)
wrx fuel pump
wrx injectors
wrx topmount intercooler
greddy type s bov
greddy emanage
colder spark plugs
boost gauge
egt gauge
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Old 10-10-2005, 10:47 PM   #15
Hitokiri
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sounds good. It should run well like that. Hit me up for a basemap when you get further down the line.

o - and I would rather not sell my blue emanage at this point.
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Old 10-10-2005, 11:20 PM   #16
2.5 Blue Roo
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no prob, i just bought another one so no worries
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Old 10-11-2005, 08:53 AM   #17
ai42
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Wait I thought WRX injectors are top feed, and legacy is side feed injectors? I suppose you could replace the fuel rail but you could source say legacy turbo injectors (370cc) or JDM Silvia injectors (not sure but I think 440cc).
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Old 10-11-2005, 09:23 AM   #18
2.5 Blue Roo
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iirc 99RS injectors are top feed as well, so the wrx injectors will work in my fuel rails
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Old 10-11-2005, 09:40 AM   #19
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Quote:
Originally Posted by 2.5 Blue Roo
iirc 99RS injectors are top feed as well, so the wrx injectors will work in my fuel rails
Opps sorry I had a brain lapse. I was reading legacy turbo etc and I was thinking you were turboing a NA legacy. Forget it was a 99RS which your correct that should work.
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Old 10-11-2005, 02:02 PM   #20
2.5 Blue Roo
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hehe no prob, it happens
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Old 10-14-2005, 09:40 PM   #21
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k, another question, what spark plugs should i get for this setup?
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Old 10-15-2005, 02:01 PM   #22
ai42
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Pick up some Irridium plugs. Some people run 1 step cooler plugs but that is up to you. There was a good thread talking about this.

http://forums.nasioc.com/forums/showthread.php?t=849879
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Old 10-17-2005, 02:18 PM   #23
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alright, well ive run into a few hold ups, after searching a lot, ive seen that i need a 20mm uppipe spacer so the uppipe will clear the block, taken care of- ordered one today

second
the N/A waterpump apparently is in the way of the turbo legacy headers, soo im oging to need to get a turbo waterpump- this is going to be a pita, im not comftorable taking off my timing belt, but i know some people who've done it before so maybe theyll help, ill keep everyone updated
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Old 10-17-2005, 10:55 PM   #24
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Im setting up a turbo kit on my 99 as well and i am wondering if i run WRX injectors will they affect cold starts and run super rich while off-boost? I was going to go with the 5th injector (rallitek has info on this) but i really do not want to have to deal with the second map, welding the IC, and splicing my fuel lines. So WRX injectors it is? if i run the e-manage will i have to lean out the car while of boost? thanks for the help fellas, this thread is a ton of help!
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Old 10-17-2005, 11:33 PM   #25
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Quote:
Originally Posted by ccroach
Im setting up a turbo kit on my 99 as well and i am wondering if i run WRX injectors will they affect cold starts and run super rich while off-boost? I was going to go with the 5th injector (rallitek has info on this) but i really do not want to have to deal with the second map, welding the IC, and splicing my fuel lines. So WRX injectors it is? if i run the e-manage will i have to lean out the car while of boost? thanks for the help fellas, this thread is a ton of help!
Given enough tuning it should start up fine. Emanage has support for larger injectors (and adjust fuel flow down). As far as running lean on boost well you can adjust the fuel maps to an extent and fix any lean condtions. Honestly though you will want a wideband to really tune it out perfectly..
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