cantcatchme96

good advice, however, im only going to be pushing 10psi, so do you think a t25 would run out of power in top end, high rpm? I talked to brian at rrm, he thinks i should lean toward a 16g, but i just want whatever is gonna spool quickest and hold power through the rpm range , so if you guys think a t25 would die out at high rpms, at 10psi, let me know what you think is best, because I cant find barely any info online, this will be my third stupid turbo and I just want to get it right. Im simply leaning toward the t25 myself because its quickest spooling, but if it cant hold power through 10psi then I want the turbo that can, but spools quickest? and ideas r great, thanks

ambystom01

iTrader: (7)

Go with the 16g. The difference in boost threshold will barely be noticeable but the lack of umph will be.

cantcatchme96

16g k, how big do u think the spooling gap is between that and a t25? assumption?

ambystom01

iTrader: (7)

I would guess less than 500 RPM.

darkmitsu

iTrader: (1)

i tried 4 turbos on my old 97 eclipse gsx

the stock t25 was fine turned the boost up to about 18lbs it felt ok at this amount of boost, and spooled pretty damn quick although i hated the way cold side compressor housing is shaped where it pointed directly to the passenger side for the smic.

i then put 650cc injectors and an safc2 and a fmic so it was time for a bigger turbo.

i then bought a big 16g new from slowboyracing.com it had a wastegate acuator problem sat about 1/4 inch open with no boost causing it to take till 4000rpm to spool to 20lbs it didnt feel any better than the t25

i then got a small 16g from a friend to use for free it had a problem where it was blowing oil into the intake unless it was boosted ran it for about 4 weeks it spooled to 20lbs at about 2800rpm.

i then purchased a evo3 16g from slowboyracing.com it had very similar spool up as the small 16g but you could definately feel the power difference. i ran a 13.7 @ 25lbs of boost with this setup. i was having a lot of boost leak issues with the crappy ssautochrome couplers, make sure you buy quality silicone couplers.

overall when you get a turbo you need to look at a few things.
a 13g flows 360cfm comes from a 1g automatic eclipse
a t25 flows 280cfm comes stock on all 2g eclipse
a 14b flows 450cfm comes stock on the 1g eclipse 5 speed cars
a s16g flows 480cfm
a b16g flows 505cfm comes stock on the imported 4g63t with the yellowtop 510cc injectors
a evo316g flows 550cfm comes from imported 4g63t motors

keeping that in mind
if you flow 280 cfm@ 10lbs of boost on a t25 it is the same as flowing about 4lbs of boost on the evo3 turbo
oh and running high amounts of boost on a small turbo creates a lot more heat and could melt things.

this is the way i understand it, and yes 10lbs on the evo3 turbo blew 18lbs away on the t25.

cantcatchme96

so the 16g, thats a lot of good info thnks, and around 500 rpm spool difference isnt bad, i think my t3 now is full spool between 3400 and 3700 and it pulls on top but lags, so i definantly wanted a better spool time, thats my main goal

cantcatchme96

and if anyone has any estimate, at what rpm do you think the 16g will be at when hitting 10psi? im talkin bout the evo3 big 16g, I was reading and apparantly thats the best one, and a company selling them i think on here said that they are said to see 10 psi at 2200 rpm and 15 at 2800, that would be amazing, but somehow i question those statements...?

ambystom01

iTrader: (7)

That spool sounds insanely low, I would guess full boost is seen at about 3000 RPM.

cantcatchme96

yea thats exactly what i said, lol

cantcatchme96

my friends srt4 is stock w/ a bov, his has practically zero lag, and his car pulls hard till redline, he pushes 12 or 13psi, the turbo in them is a tdo4? thats bigger than a t25 right? whats your opinion on those?

ambystom01

iTrader: (7)

I think the SRT-4 uses a 16G (which is a kind of TD04). Don't forget that comparing a factory tuned (and very different) car to your aftermarket setup isn't exactly straightforward, the SRT-4 has a 2.4 l motor and was designed to have very little lag and consistent boost all the way to redline.

cantcatchme96

the srt 4 is a tdo4 hL i think and its a 15g, i think im going to go with something along those lines, because i was reading and the 16g is a pretty close comparison with my smaller t3 as far as spool time and output, so I want that faster spool, unless any other inbetween ideas

Turbodemon

iTrader: (2)

look into the td06 17c also
just a thought
we used it alot on the mr 2 turbos with great response and still good top end
most of the guys ran a steady 350 whp and i think it would go up 400 hp
but i never heard of evo dudes using it. it is a mitsu turbo though.
im new to evos but it has a great rep with the turbo duece.

Turbodemon

iTrader: (2)

Turbodemon

iTrader: (2)

not a really big turbo so you might get what u want out of it and im sure it is compatible with the mitsu manifolds also.

here is a dyno plot from a mr2 at 22 psi

made decent numbers with bolt on mods and they ran 12's with this setup