???? ABout TuRbos

[gtrs28]

i need to know what would be a good turbo. a T3/t4 garrett or a disco potato. i have 1300buck to spend and want to spend them right. i know if i buy a t3/t4 it would be around 600 bucks so that would leave me with some cash left. i would add a steedspeed t3/ t4 v mani. or should i just get the disco potato. im trying to replace the t25. it really doesnt spool much any more. ALSO do you guyz think i could run the disco at low psi like 6-8psi////??????(eekdance)

 

[ueat1023]

Gt3071r(500hp+) Or a Gt2871 (450hp max)..Around same price, new gaskets,new liquids.WD40

 

[yudkib]

the stock WG is set to 6 psi so you could, but make sure all your supporting mods are in line. that means FMIC and either a unichip or split second AFC at least. you should also have a midpipe, and a catback wouldnt hurt. and look up the millenia PCV. and do silicone vac lines and a distributor block. and a boost gauge and wideband AFR gauge.

that being said, i think the GT28RS is generally the best swap for these unless you can source a T3/T4 for dirt cheap.

 

[gtrs28]

Gt3071r(500hp+) Or a Gt2871 (450hp max)..Around same price, new gaskets,new liquids.WD40

dude i have a stock block i just need a new turbo so i need help to chose one. a t3/t4 and steedspeed mani or spend all on a disco potato and if so can i run at low psi 6-8psi

 

[yudkib]

anything bigger than a 28RS or T3/T4 is entirely overkill unless youre already forged.

 

[gtrs28]

the stock WG is set to 6 psi so you could, but make sure all your supporting mods are in line. that means FMIC and either a unichip or split second AFC at least. you should also have a midpipe, and a catback wouldnt hurt. and look up the millenia PCV. and do silicone vac lines and a distributor block. and a boost gauge and wideband AFR gauge.

that being said, i think the GT28RS is generally the best swap for these unless you can source a T3/T4 for dirt cheap.

i was looking at the garrett t3 /t4 6oo bucks

 

[gtrs28]

anything bigger than a 28RS or T3/T4 is entirely overkill unless youre already forged.

i mean yeah its a stock internal but i dont want to spend all that money on an oem turbo. lets upgrade right.

 

[gtrs28]

i have fmic stage 1 clutch greddy boost controller hks bov rc milli pcv awr f and r mounts cs fly wheel aem wb

 

[yudkib]

tough call. you are correct not to rebuy the OEM turbo.
ready for this, heres what i would do.

buy a midpipe, a piggyback AFC, and the bombshell - there was a guy around here called MPNick who would upgrade stock turbos so they flowed between the GT25 and the disco potato. rumor has it he still does it but isnt active on the site anymore. dig around and see if you can get in touch with him.
my $.02

 

[808MP5]

anything bigger than a 28RS or T3/T4 is entirely overkill unless youre already forged.

Hehe not really overkill. Just ready to make more powa. Either way both would be sufficient. I would get the bigger turbo although I have no reasoning for that choice.

 

[gtrs28]

yeah that what i need.... what about the gt28rs that cost like 900 bucks it hold 310hp that should be good right????

 

[yudkib]

heres the thing - a well done stock block build either takes the GT25 absolutely as far as it goes, or barely takes advantage of the 28RS. the MPNick is in the middle.

i dont know the CFM of the T3/T4 @ stock wastegate pressure (or if its internal/external... i know nada about them). but without a good tune on a 28RS youre close to the danger zone.
supposedly the stock ECU manages the disco potato alright but 6psi on a 28RS is about the same CFM as 10psi on the 25. most people say you shouldnt go over 8psi on the 25 without some sort of EMS, and definitely not without a midpipe.

so again id suggest getting a piggyback and doing exhaust work before the disco potato, or hunt down MPNick. but yes, the disco potato would be in the WHP range youre looking at.

 

[43975]

My vote is GT28RS!!!
You can run the GT28RS on low boost (I'm only running 4-5 PSI) The GT28RS can infact be run a stock everything (I'm talking bone stock plastic pipes and all) I know cause we did it for about a month while parts were still coming in but I don't recomend it. The Stock MSP ECU can easily handle the GT28RS at low boost as well. I know of several guys without aftermarket EMS with the disco doing just fine. The stock ECU is just tuned pig rich, so the Gt28RS seems to lean that tune out a tad but not far enough to be scarey.
I
IMHO the minimum mods needed for a low boost GT28RS swap are:
1. Forge WGA (you can set the PSI to a safe 4-5 for winter then up it a bit of summer)
2. Up-graded mid pipe (catless is better) I found that once the turbo was able to breath better she was much more comfortable.
3. Upgraded SMIC with hard pipes ( your better off going with a simple DIY FMIC though)
4. One step colder spark plugs.
5. Be sure to get an oil line restrictor for the GT28RS!!!
6. redo your vac lines and run them off the Brake booster line( not mandatory but a good idea).
If your not going to run an after market EMS and tune it a wide band A/F gauge isn't really needed.
If I think of anything else I'll post it

 

[justanothermp5]

yeah that what i need.... what about the gt28rs that cost like 900 bucks it hold 310hp that should be good right????

i dont think you understand how weak the protege engines really are lol
you wont be getting anywhere close to 300whp on a stock block thats for sure

maybe if your lucky and have a decent tune you'll be able to hold 200-220whp on LOW boost, as soon as u turn up the boost you'll throw a rod through your hood

 

[.mazda.speed.]

i dont think you understand how weak the protege engines really are lol
you wont be getting anywhere close to 300whp on a stock block thats for sure

maybe if your lucky and have a decent tune you'll be able to hold 200-220whp on LOW boost, as soon as u turn up the boost you'll throw a rod through your hood

There all right, If your upgrading the turbo you need something to tune the car. Like a Splitsecond AFC. No point in modding a car and not tuning it imo.
If you have no plans to go forged and make big power, Buy the gt28rs save for a splitsecond afc ($250) then get everything tuned and run low boost!

 

[gtrs28]

i dont think you understand how weak the protege engines really are lol
you wont be getting anywhere close to 300whp on a stock block thats for sure

maybe if your lucky and have a decent tune you'll be able to hold 200-220whp on LOW boost, as soon as u turn up the boost you'll throw a rod through your hood

dude im on my second motor already. the first on i hit 14psi and spit a rod out the block.... good times. i have every thing except a ems... while i have a greddy e -manage ultimate im crossing my fingers that it going to work for me. i got it for $150. so is the gt28rs the disco potatoe or is it the smaller one... im not try to get real big#s just 230-245hp trying to keep up with the ms3

 

[43975]

dude im on my second motor already. the first on i hit 14psi and spit a rod out the block.... good times. i have every thing except a ems... while i have a greddy e -manage ultimate im crossing my fingers that it going to work for me. i got it for $150. so is the gt28rs the disco potatoe or is it the smaller one... im not try to get real big#s just 230-245hp trying to keep up with the ms3

You can get 240 WHP with the stock turbo at 14 PSI, all the bolt ones and a great tune. Search for slo03.5msp you will see what he is running. He's also got a stock motor!!!
I could most likely see those same numbers if I were to turn up the boost to say 8 psi on my GT28RS AKA disco pot...considering I dyno'd at 190 whp with only 4 psi a weak tune and a boost leak.

 

[yudkib]

if you run 8psi on a disco potato using emanage, i wouldnt be surprised if you move on to your third block in a matter of a couple months. sell the emanage to people who use them (i dont know if theyre popular with WRX's or who uses them) and get a SS.

by the way - 14 psi with no exhaust work and no engine management means you definitely kamikaze'd that block. do the exhaust and split second before you do the turbo, unless youre getting a forge WGA to drop it down to 4psi.

 

[gtrs28]

well ok for sure im getting the SSAFC i already have cat back i could buy the mid pipe w/a high flow cat. would that be kool

 

[yudkib]

yeah a 2.5 with a high-flow should be fine. sometimes on the forum you can snag a p5 catless midpipe for about 100 shipped, so thats not a significant dent in your budget, and lets you upgrade to the CS downpipe or one of the other ones that are trying to get off the ground. the MSP midpipes usually include the J-section, so if you do that, upgrading to one of the other downpipes will require an exhaust shop to cut and reweld the flange.