jimmyv13

I am finally upgrading to a full Garrett AirR T04B with HKS cast mani this winter and I'd like to know what I'll need to get the most out of it. I know I've read something about charting the turbo used with the motor used to find what cc injectors are needed, but I can't find the chart.

My mods on the car right now are:
full RB turboback exhaust
HKS intake
ported TB
MBC
Walbro fuel pump
LT8 ECU

going on this winter are:
S5 intakes and W2A S5 IC
Garrett AirResearch Full T04E, .60comp, .96turbine
custom oil and water lines
HKS cast mani
HKS 35 or 40mm WG with dump tube
FPR
I'm hoping to use the 680 and 1600 injectors I have in the garage.

Any help from the knowledgeable turbo guys that can do this kind of modding in their sleep will be much appreciated.

Thank you.

jacobcartmill

iTrader: (6)

are you putting on a t04b or t04e? typo?
anyways

thats pretty much the exact same setup i have, but i have a t04b vtrim and the 115 a/r turbine housing, ptrim exhaust wheel. everything you have listed there should be fine! good luck with it

Turbo II-FB

isnt the to4b the bnr turbo??

jimmyv13

I was told it's a T04B, the picture shows Garrett AiResearch on the comp housing.

RacerXtreme7

iTrader: (2)

Thats a T04B

RotorJoe

Please enlighten me, How can you tell?

Thanks
Joe

RacerXtreme7

iTrader: (2)

I can tell by the comp housing and also it has 8 paired inducer blades were the T04E has 6 paired blades.

~Mike..............

RotorJoe

Thanks

AsianFlip06

Hmmm well i bought this turbo and the seller told me its a T04b...But it has 6 blades opposed to the 8 shown above. Would I then consider this a T04E? The AR is .60 with 1.15 divide for exhaust P Trim.

jacobcartmill

iTrader: (6)

yeah jimmy that is a t04b vtrim. same compressor that i have.

also, ditch that freakin oncenter housing. they are the suck

Turbo II-FB

what type of power is expected with that turbo ,and what is the peak boost at?

Boost Lee

iTrader: (3)

I've got a very similar air research unit... I'm making 303whp at 14psi with 3" full exhaust and some additional injectors to make the top end air fuel ratio work out ok. The downside to the turbo is I get no power in 5th, 4th, or any gear for that matter unless I'm near 5k.

5th gear on the highway is useless under 80mph. So... I'm looking for another turbo.

MrDirt

Do you have the 1.15 turbine housing as well? You may want to consider changing that out for something smaller before you go ditch the whole turbo.

jimmyv13

Why do the center housings suck?

jimmyv13

This will not be a drag car by any means. I'm not looking for top HP, just something to move me along a little better than the stock turbo. I don't drag race, I want to get more into Auto-X than anything.

RacerXtreme7

iTrader: (2)

AsianFlip06,

Its hard to guess what turbo you have without measurements like inducer and exducer (major and minor diameters). Aside form the T04E family, theres MANY turbo's with a 6 paired inducer.

Jimmyv13,

On- center housing have a lower efiency then standard tangical. So expect slower spool and less top end when compairing the same A/R value to a normal tang turbine housing. The on-center housings were designed for applications were packaging contraints were the main concern over performance. Furthermore, your going to have a hard time finding a manifold that will work with on-center turbines, their all made for standard tang. So the HKS cast, tubular, or any other name brand mani won't work unless its custom with one exception. The SSAutoChrome manifold designed for the FD. If you use this with a on-center it will fit. Do your own research as if you want to use this low cost, low quality manifold and the less effient on-center combo on your rise. You'll find that this set up will yield a rather laggy set up for an autocross car. For auto x you best find another set up like a hybrid or better turbine and manifold combo.

~Mike.........

jacobcartmill

iTrader: (6)

jimmy if you have stock ports and want to have good response with that turbo i'd go with a .81 tang turbine housing. i have a 1.15 ptrim hotside, but i have a medium sized streetport and stock exhaust ports, with full boost by about 4500rpms, powerband really from about 5k-7800. the 115 is slightly too big (though it still does well, and great topend) and i'm wanting to get a .96 instead. i made 330whp@13psi this past weekend on the dyno so i'll be expecting a slight gain in response and maybe a slight drop in topend with the smaller .96 housing.

but your setup with a .81 tangential ptrim turbine housing should have great response and still make atleast 340-345whp on pumpgas and 15psi. i say only 345whp because i'm expecting 360@15psi on mine with a noticably larger turbine housing.

edit: or possibly a .84 tang housing if you're wanting to do divided

jimmyv13

Thanks for your reply Mike. This is the first I have heard of the on center vs. standard tangential housing debate, obviously my research was not nearly thorough enough. Well, I refuse to run the SSAC mani, so I guess my option is to keep looking. The hybrid idea is OK, I guess, but I like the idea of having an ext WG. I know it can be done with the stock mani, but is not easily done and something I'd only do as a last ditch resort.

jimmyv13

Jacob,
Something like this:

http://cgi.ebay.com/ebaymotors/Turbo...spagenameZWDVW

jimmyv13

I'm wondering if it's worth getting the on-center turbo and rebuilding it with the tang housing, or if I should just hold out a bit longer for something better to come along.

Any opinions?

The Griffin

There's nothing to rebuild.I'd look around at diesel/turbo repair shops for a tang. or tang./divided housing (used one,make sure it's for the right turbine wheel-trim, i.e. "P" ,"O" etc. trim your turbo is).you unbolt the old one and put the newly acquired one on .

jimmyv13

Well, I don't have the turbo as of right now. I have paid for it, but the guy has not shipped it yet, so I'm considering just getting my money back and finding a different turbo.

jacobcartmill

iTrader: (6)

yeah there's nothing to "rebuild"

you just take off 6 bolts, remove the crappy turbine housing, put the NEW turbine housing on, and tighten the 6 bolts. its more simple than you think.

jacobcartmill

iTrader: (6)

yeah exactly like that but you want atleast a .81

that 68 is gonna be too much backpressure and probably the same spool as a stock turbo lol. the .68 may bleed boost too

jacobcartmill

iTrader: (6)

i would go with that one and just get a nice turbine housing. you wont be disappointed. i have the same compressor and compressor housing as you and seems to be a great match for a mild or medium ported 13bt. my turbine housing is even too big and i still have a usable powerband