Well I have to say after drifting a few times on the t78 I must say it is not going to work. I bought the car with this turbo on it already, but its time to change turbos and get the response and powerband i want. I am tuned right now to 420 at 17psi, but the turbo doesnt wake up til about 5k.

Specs on motor:

13b rew
New rear housing
Balanced rotors
3mm seals
oil mods
cooling mods
Jacobs ignition
Mocal dual oil coolers
Greddy FMIC and pipind
Streetport
Exhaust ports matched
Apexi PFC

I am leaning towards a TO4, but dont know which one to get. Any input would be greatly appreciated. I am looking for better response and faster spool. I also want it to be 400hp capable.

 

im running a TO4R

 

T04B thinking of getting a RX-6 From apex'i though.

 

What turbo manifold do you have?

 

or you can do what i did.

get an electronic boost controller and a weaker wastegate spring. then max out the gain setting on the ebc. I have a .6bar spring. It spikes to about .9 then sits about .8. The ebc really helped my spool times and the weaker spring saves me from overboosting. its a cheaper idea then buying a new turbo

 

I have a greddy manifold. I already sold the t78 and plan on getting some type of TO4. There are some many TO4's out there to choose from. I guess I'm going to have to look at the turbo maps and decide which turbo would be best for me. I want to have a really good spooling TO4 and make it work thru the full RPMS.

 

Well then a TO4S would be your best bet.

 

why not just run a gt35r with the divided t4

 

i can think of 515 reasons why according to atpturbo.com

 

I got a gt35r t3 for 800 shipped brand new.

Just gotta know the right people

 

werd

i have a phobia of t3 though

 

I bet you just got the GT35, not the BB model.

 

nope, its the BB. I didn't want the journal bearing. Its nice to know people that work at Garrett facilities :P

 

Price is definetly my concer, but response and spool is my main factor.

 

5k for the t-78 to wake up.. i doubt that

my t-78 kicks in at around 3.7 k

If i was gonna change the t-78 i would go for the gt42R which is even slower but once it kicks in its freaky

but if you are looking for quick response go for the rx6

 

Well a lot of factors play in response and spool up of the turbbo. I have a Greddy FMIC with all its piping. I plan to run a vmount set up this winter and a smaller turbo to help me on low end power. I'm leaning right now towards picking up the T04s. Does anyone have a dyno sheet or any info on a streetported engine with this turbo?

 

Check the single turbo section. People post facts there.

 

Richard Lovejoy by any chance?

 

i vote gt35r or apexi rx6

but good luck getting the apexi turbo, i have yet to find one for sale. and the kits usually run a pretty penny or two.

 

here's what you do.

get a borg warner s300 series turbo. they're available from bullseye or direct from air werks.

i get full boost at 3500 and it pulls to 8500.

don't be sold on ball bearing bs.. if the compressor and exhaust wheels are sized properly a journal bearing turbo will spool just as fast, and have less likeliness to fail.

 

HKS T04Z would be sick... why not spend the $2,500 to $3,000 for the best, right?
ive been jockin a HKS set up for about a year.... yeah thats gonna be my own Graduation present. AZ!

 

Thanks for the info fellas.

 

if it isn't secret, what is the spec on your turbo?

 

I was hoping he tell us, but I didnt want to be the one to ask.

 

last time i spoke to kyle (mohan), i was very surprised how small hot side he's running.

im wondering what's justins setup. kyle is running bb though.