FlamedROC

Everyone who has completed their Twin Turbo project post up your pics. But please post some info behind your set-up such as....

Displacement
type of rotating assembly
Cam choice
Heads
Turbos Used and their specs
Intake
ECM system used (Holley, FAST, ACCEL)
HP/TQ
1/4 mile time

Also post some problems you had and suggestions. I'm just curious as to what everyones looks like cause everysingle set-up is different.

I would like to keep this thread kinda comment free, Only looking for posts of set-ups with their info. Please Do not respond with "hey I love the set-up" or ""You still have the best TT set-up out there" etc. PM the memeber if u want to congradulate them... Thank You!!!

TWINS ONLY PLEASE

Jason

Raven90IROC

Have a look at the sticked post above for everyones pics. There are some great ones on here.

FlamedROC

I want this post to be specific to twin turbo set-ups on third gens. I'm trying to filter out the superchargers and single turbos out there so people who are looking at TT can see whats out there for set-ups. Also get info on what people are running for bottom ends and such.

89JYturbo

I think most people here know my set-up, but I'll share anyway. Its was my first venture into turbocharging, and I'm pretty happy with it. I want to go a bit faster though





Specs:

-Displacement- Stock 350 L98 TPI
-type of rotating assembly- Stock
-Cam choice- Stock
-Heads- Stock
-Turbos Used and their specs- Garrett T3/T4 Hybrids, TO4E 57 Trim compressors and T3 Stage 3 turbines in .63A/R turbine housings
-Intake- stock TPI
-ECM system used (Holley, FAST, ACCEL)- Stock with FMU with MSD 6AL and BTM; 24# SVO injectors, Vortech boost pump
-HP/TQ- 328RWHP, 467RWTQ- IIRC, the peaks were at 3300 and 4200, respectively
-1/4 mile time- best ET- 12.46 at 113mph (drag radials), best trap 12.8 at 117mph (street tires, cold air)- these times were on my old junkyard turbos. I ran one pass with the new, larger turbos, and had bad tire spin in 2nd and bounced off the rev limiter at the top of 4th gear for the last 200 feet or so (should have used 5th), and got a 12.6 at 113. This was on the 18" street tires. It needs more tire or less rear gear to make the combo work together. Or a higher power band.

Other:
(2) Ford Probe GT Intercoolers
Stock exhaust manifolds modified to mount turbochargers
Tremec 5-speed swap and 3.70 geared 9-bolt
Car weighs 3700 with me in it
6psi of boost (creeps to 7 near redline)

Problems:
The car has been very reliable for me. Other than a few instances at first where the IC plumbing blew apart under boost, nothing has broken. I do have issues with under-hood heat. The engine doesn't overheat, but I do a lot of street driving/cruising on hot days and it can start to melt wire conduit and plastic items under the hood. You need to be careful how you route the wiring. Since most of this conduit is rated to 250°f, I'm guess my underhood temps get close to 300°f. I think the biggest problem is if I let the engine sit with the hood closed after a long drive. Everything just heat soaks terrible with no ventilation air. So now I open the hood when I stop for a burger. No problem with the. Gets a lot of attention though.

The only other issue is that I wish I had retained my A/C.

It has gotten a tad over 20mpg on a trip, which I think is pretty cool. Usually it's around 15-16 though, depending on how much turbo you use.

ttypecamaro

iTrader: (2)

not as pretty, but also functional...


another picture here


-4 bolt 350 .030" (1975 Van)
-70 camaro new stock replacement internals (cast crank, 9.4:1 hyperutectic pistons)
-GMPP Vortec heads
-powermax cam (for mild turbocharging) 204i 216e @.050" .427"i .454"e
-SDPC baseplate
-stock TPI runners, plenum, and TB.
-Commander 950 w/ innovate WB O2
-twin thunderbird intercoolers (dual 2.5" intake piping into 3")
-8psi(@80F)-------->9psi(@40F)
-twin turbos from spooled motorsports:
t3 chrysler
50 trim .42AR compressor
69 trim .48AR turbine
-93 octane
-14 degrees timing and 12-12.5:1AFR @ 156kPa(~8psi) for safety.
-open 2 7/8" downpipes (quieter than my bro's 350 nova w/ dual deltaflow flowmaster mufflers AND quieter than his TA w/ an 80 series and no cat... untill boost hits!)

from a stop: boost at 2600rpm, full boost by 4200rpm in first. Full boost by 2900rpm in 2-4. 1st gear is so quick, it has no time to spool. Spool time was around 2 seconds.

-awesome whining sound from the turbos!
-15mpg city
-coolant always between 170 and 220 with new radiator and 160 tstat
-melted a spot on the hood insulation and one of the plastic pins that hold it up. Hood stays cool though.
-I would pull the hood latch when parking to crack the hood open for heat.
-I had to washer the stock hood about 1/4" for clearance insurance. Driver turbo still rubbed the hood when the motor torque'd (rubber mounts)

KillerZ302

iTrader: (4)

Well, here is my setup. Its new. I am sure no one has ever seen it. Well worth the effort. All custom made by me and me only. Feels great to accomplish something this big on your own with no help except inspiration from others on this forum. Thanks Guys Info in signature

zippy

Here's one a friend/associate did.

BBSDesigns

Here is one that we installed last weekend and the happy owner getting his hands dirty with it.

FlamedROC

anyone else?

Willie

iTrader: (1)

Displacement
305

type of rotating assembly
4340 Cola Crank
4340 Manley H-beam Rods
JE Pistons (floating pin)
4-bolt conversion with splayed outers and studded inners.

Cam choice
Custom - Cam Motion

Heads
AFR 190

Turbos Used and their specs
"Hybrid" T4s
Specs Classified - Do you have clearance?

Intake
TPI
Twin Intercoolers
Methanol Injection

ECM system used (Holley, FAST, ACCEL)
7749 / $58

HP/TQ
No idea.

1/4 mile time
Not run yet but better be better than a 12.004 & 117.62 mph (my best with a D1SC).

Also post some problems you had and suggestions.
Sorry, don't feel like typing a thesis today.
If you want to see pics, search this forum with my username. You'll see a handful on other threads.

ttypecamaro

iTrader: (2)

I sold my first Twin turbo setup.
Here are the changes I made when building the new one:

- TIG welded stainless headers: 1-1/4" pipe with a better collector design that is not shrouded by the flange.
-T3/T4 turbos
57 trim .50 AR compressor
.63 AR turbine
I'm not gonna lie... I bought XS power turbos, but I bought them BEFORE I knew they were the same thing as ssautochrome junk. they're still boosting though.
-t5 manual transmission: clutch slips in 3rd-5th @ 8 or more psi
-3.23 gears: they're great, much better than 2.73s or 3.73s
-38#injectors
-highbeam delete for a cone filter to each turbo.
-I "flared" all of the charge pipes with an adjustible to keep them from blowing off. The Superglue I used last time proved to be a pain in the butt for disassembly!!!
-a little more timing up top

Changes in performance:
-10psi. Creaps to 12psi near 5500rpm. With the larger turbine housings and the boost creap the powerband goes past 5600, but I shift there or sooner anyway. Transition to boost is very smooth.
-With the chrysler turbos (8psi) I shifted between 4800-5000, it really died after that. I blamed it on the TPI and cam, but now I wonder...? Maybe the 700r4 held it back too? I think it was the turbines.
-I miss the automatic and wish I had an OD auto that could handle the torque.
-I towed a van with my car, no problem, no boost needed.
-the whistle is much cleaner/threatining sounding.
-coolant is easily controlled by the fan sensor, where before the fan was wired always on and still ran hot. I blame the turbines again.

A few problems:
-idle is really hard to get right. I unplugged the IAC and its pretty good now.
-warped header flange = minor exhaust leaks
-internal wastegate geometry was difficult and tedious on these turbos.

tuning: still using the Holley Commander 950 with a 7730/$58 sitting right next to it. Working out the last bug from when I swapped wiring harnesses. fuel pump acts up with 7730/$58 because of oil pressure switch wiring that didn't swap right.