very nice, good job that should stop all the questions about what turbos are better lol

 

Haha... Nice post Scott. Who knows... You might have saved a lot of people from posting about this in the future.

 

I dough't that lazy new comers will just ask again

 

awesome post

ur not just a whore after all ;-)

 

Yea he is... Don't let him lie to ya.

 

Hey You have been deleting my posts bastard! j/k

 

Not I said the green duck... But I'll sticky this for ya to save future newbs the flaming.

 

i cant see how the S13 and S14 turbos put out close to the same power when people have put out 300whp on the S14 T28 at around 18psi.

 

^What other mods did they have?


BTW I just read up on it again and it's rated at 270-280 but not 300 :12dunno ?

 

BoostedVR4 has a S14 T28 w/ AEM EMS making over 290whp i believe. I dont think you should put the HP ratings of the turbos up since engine setup is going to have alot to due with it. With an ECU Tune, Larger injectors, and Z32 MAF the T25 will go over 250whp. Check my cardomain at my current setup and tell me you dont think I can get over 250whp. I never had the car dynoed but it did a 106mph in the 1/4 before i did the injectors, maf, enthalpy tune, and cams.

 

OK then I will note that the HP ratings are w/ Fully Stock Motors

 

for the S15 T28 how come you put safe boost 15-18 then put Max boost at 17. Doesnt make much sense? Max boost would really be what the turbo can push with the vacuum line off. In that case my T25 pushed 1.5 bar once when the vacuum line popped off my boost controller.

 

just realized that, sorry

 

good post, 240-kid!

 

good post.

the hp ratings for those are whenever the turbo is still in its efficiency range. you can always make more power, but the turbo is just out of its efficiency range, which is bad for the turbo as it is spinning way too fast, and also heating up the air way too much which is why the power gains arent as good. if you dont care too much for your turbo though, or if you just do it on race gas every now and then, it should be fine. i got a friend who's been pushing 22-24psi on a little 14b for a very long time.

what i still cant figure out though is how the s15 t28 has the exact same specs as the s14 t28, but has an efficiency range good for higher boost. guess i just need to read up more about why that is (if someone finds out, post it here, id love to know).

 

FYI there are different versions (for different international markets) of both the s14 and s15 t28's. Different bearings (CHRA's) and one of the s15 versions had a seperator in the exhaust flange.
For example the Australian market never got the BB s14 turbos and only a few s15's got the BB version but were retrofitted with s14 parts instead.

here are the part numbers

Jap PS13 14411-50F00
AU/NZ S14 (pre-facelift) 14411-75F00
AU/NZ S14 (facelift) 14411-75F00
Jap S14 (pre-facelift) 14411-69F00
Jap S14 (facelift) 14411-82F01
Jap S14 (Autech/270R) 14411-RP801 (Same as S15 early MT turbo)
Jap/ NZ S15 (early*) 14411-91F00 Manual model only
Jap/ NZ S15 (early*) 14411-69F00 Automatic models

Jap/ NZ/ AU S15 late* 14411-75F00 Same as NZ S14 and same for both Auto and manual

 

didnt you for get the gti-r t28??? That turbo w/ an external wastegate will hold 18psi and get you 320whp.

sorry didnt see the stock motor part, no, i had it right, so your telling me that a gt28r is good for 300hp on stock motor, i think i would like to see those dyno charts

 

the stock injectors on an s14 dont go to 300rwhp high either (i assume we are talking rear wheel hp numbers?)

 

im running 1 bar with my current setup and it spins wheels all the way to 60mph when it didnt use to at the same boost with my stock setup. Boost can get you so far but adding engine mods on top will bring the power up even more, even at the same boost levels.

 

iirc, some of the S13 T25's came in a .80 A/R as well.

 

^That is correct I just dont know the Full Pec's / Ratings of it

BTW Joel do you have the spec's or a site that does of the BB and such

 

wondering - how can you tell if your s13 t25 came with a .80 A/R? i push 15-16 pounds of boost all day on my t25, but my cooling system is powerful, and a custom cold air intake helps it suck in the cold stuff. but a FMIC, short throw shifter, fat, stickey tires, tubular steel exhaust manifold, and engine torque damper all help me too, so i guess i'll run the little t25 till she blows.

 

^on the Front of the turbo it says "GARRETT .xx A/R" I found a pic I'll post it

 

Here:

http://www.courtesyparts.com/Mercha...ts.com/Merchant2/merchant.mvc?Screen=PROD&Store_Code=CP&Product_Code=SR20DET-TC

 

well fuck, i never bothered to look >_> and i've taken that turbo off countless times o_o

 

All the T25's that were on the SR20's were .80 A/R. I know you got your info from a site that ive seen before and noticed it was wrong after i removed my turbo and it said its a .80 A/R. Also my SR Redtop is the older model. How can i tell? The newer models of Redtops had cooling fins on the front of the block just below the valve cover. My buddy has the newer model Redtop and his T25 is .80 A/R also. I truly dont think this thread should be stickied because the info really isnt accurate enough.