jacobcartmill

iTrader: (6)

i found a good deal on this t04S,
.70 a/r comp housing.
.82 a/r turbine housing (too small? i have nearly stock ports)
60-1 wheel

i am not sure what trim the turbine wheel is, but here is a pic of the turbine side...



i'm wondering what kind of power i can make at 10psi, 15psi with this turbo on my setup (also maybe 20psi on some 110 octane). i have a small streetport and stock exhaust ports... anyone around here know how to decipher these compressor maps into estimated power per psi (and/of efficiency)? i'm hoping to make between 320-350whp at low to medium boost on this turbo keeping it under 15psi.
i'm also wondering if maybe that .82 a/r is gonna be too small... i hear of MOST bigger turbo guys running atleast a .96 a/r but i'd like a faster spool time since i autocross, i'd sacrifice a little topend if needed.

eViLRotor

iTrader: (2)

Well, the compressor section (60-1) is a very nice fit for our cars.

As you can see, between 10 psi and 15 psi (PR 1.68 and PR 2.02) the compressor is right within its middle efficiency island.

So just using the peak efficiency lines, if you draw a horizontal line across the map from PR 1.7 you get anywhere from 280 lbs/min to 380.

And for PR 2, you get 380 to 460 lbs/min.

10 Hp = roughly 10 lbs/min.

Conservatively, at 10 psi low 300's should be no problem, as should high 300's at 15 psi.

Is this a T4 turbine housing? Because normally they are .81, .84,....

jacobcartmill

iTrader: (6)

thats exactly what i was lookin for thank you.

as for the turbo, yeah i believe its a t4 hotside, here's another pic:




i also looked up that part number and it does say straight t4 S compressor cover

jacobcartmill

iTrader: (6)

now evilrotor, as for the hotside A/R... would a .82 drop any boost in the high rpms you think???

chuck8313BTSDS

That hot side looks like a T3. If it is here is my dyno with that same turbo.


http://store.yahoo.com/cheapturbo/88marx7ust3.html

Motor was a 88 n/a with no porting. 9.4 rotors, air/water intercooler. NO "turbo lag".
chuck

eViLRotor

iTrader: (2)

Possibly, especially if it is T3.
But, then again, if you are not going for 'super' top end, you'll have a mega quick spooling turbo like chuck says.

Sesshoumaru

iTrader: (1)

T3

jacobcartmill

iTrader: (6)

did your boost bleed off? i'll just be running the 9.0 rotors. and i wonder what i'd do about a manifold since it'll need a t3 footprint.. anyone?

chuck8313BTSDS

Boost did not drop in the higher RPMs. Someone suggested I had boost creep after they looked at my dyno sheet but on my datalog it was really flat. Ran a 35mm wastegate and made my own manifold. Around 6" runners. There is someone on TeamFC3S ( I think ) that has a manifold for sale with a T3 flange. 500$???
chuck

jacobcartmill

iTrader: (6)

well thats good news about the turbo. i'm only wanting to make 350whp at most.


my only problem may be the manifold....

edit: i just checked out those fc3s.org blitz manifolds that guy has for sale. too big ballin for me (500 bucks!) thats more than the turbo its self. i'll have to wait for that Greddy manifold/adapter/downpipe extender to popup on ebay again or something