importkiller228

Well, It's that time again, summer's coming up and i'm gonna start my 2nd turbo build.
Car
"79 Camaro Z28
5.3L vortec/4l60e swap
241 casting p&p ls1 heads bringing CR to 8.8:1
ls6 cam
comp 1.85 rockers/ls6 springs
weiand intake/BBK tb

I've had great luck with the cheapo ebay turbo i got for my CRX, so I was gonna give them a try on a tt build for the ls1.

What do you guys think would be better:
(1)
SUPER T4 .68 exhaust turbo charger big wheel 550-600hp : eBay Motors (item 160417970279 end time Apr-03-10 14:52:16 PDT)

T4 TURBO CHARGER .68AR

Intake: 4 inch
Inlet: 2.5 inch
Compressor trim: .70ar
Compressor Wheel diameter: 57.89 /72.95
Turbine Wheel diameter: 54.47 /83.16
Exhaust Trim: .68ar
Turbine flange type:T4 flange
Down pipe flange type: 3 inch v band
Cooling type: oil cool only

or
(2)
ported shroud gt35 family gt3582r turbo .84 trim 600hp : eBay Motors (item 180486852192 end time Apr-03-10 1481 PDT)

gt3582r turbo charger .84ar

Intake : 4 inch
Outlet: 2.5 inch
Compressor trim: .70 ar
Compressor Wheel diameter: 61.52 /81.20
Turbine wheel diameter : 68.00 /62.32
Exhaust trim: .84 ar
Turbine flange type: t3 flange
Downpipe flange type : 4 bolt downpipe flange
Cooling type: oil and water cooled

hard2obtain

pics pics pics pics

busa4

go with the gt35's or a single t70 or larger turbo. post pics. would love to see this.

importkiller228

It will be summer before i really tear into it. I'm gonna gather parts for the next couple of months till i have everything i need.
Here are the turbos and the car they are going on. (gt3582r on left, and t4 on right)
I'll be sure to post a build thread with lots of pics when i start actual work. I will be running a dual intank walbro setup activated by a hobbs switch to fuel this beast. plan to run about 10lbs since stock for stock the 5.3 iron block can handle more boost than the aluminum ls1.

importkiller228

basically my question is.. would either of these, as a twin setup, run out of steam if i planned to revv out to 6500 rpm pushing 10 lbs?

busa4

twin t4"s will spool up at a low rpm while the gt35"s will spool up at a mid range rpm. the smaller exhaust housing on the t4's will choke at high rpm. if your just going to run 10psi i would scrap the twin turbo setup. its a lot of work and money for just 10 psi. go with a single large turbo. its more efficient at mid/high rpm and will generate more power. the downfall is more lag but when it spools up, hang the f%$k on. gl with your build. looks like it is going to be a sh^%load of fun.

importkiller228

Thanks for the info. I thought about the single turbo setup, but the twins have that "bling" factor that i just cant get out of my mind.

busa4

go with the 2 gt35's then. that should work well.