973800CamaroRS

iTrader: (3)

Excuse the ignorant questions but I just ordered a set of billet 68mm turbos for my car and need some help with setting it up the correct way.

Run down on the motor
370ci 9-1 compression
Frankenstein stage 2 ls3 heads flow 380cfm
Ls9 cam
Fast 102

Billet 68mm turbos .91 ar divided t4

Questions

1. Going with ctsv manifolds the outlet on those are 2.5" can I continue my hot side in all 2.5" piping?

2. Can I use an open flange on a divided turbo? T4

3. How do I know if I need oil restrictions for turbos

4. Do I need 1 or 2 50mm blowoff valves

5. Am I ok to do all plumbing in mild steel, then powdercoat?

6. How will these turbos spool and how can I help that?

7. Any brand intercooler that have a good value ?

8. Best silicone boots for the money?

9. Goal of 850whp on pump gas and 1000whp on e85

Any tips or suggestions please help me out !!!

jordoza777

iTrader: (2)

1. 2.5 hotside is acceptable but going with smaller pipe like 2.125 will help spool considerably but a lot of projects use 2.5 and work fine.
2. Open flange is "ok but causes turbulence in the exhaust flow. Run a divided flange and knife edge the center. A lot of guys do the knife edge to the turbine but its harder to resale the turbos if you upgrade later.
3. In guessing your running s300 or s300 knock offs so no restrictor needed on the genuine borg. The knock offs I have no clue.
4. A single 50mm bov is fine. Duals for looks or if your running really high boost.
5. Mild steel plumbing for the hotside is fine. For the cold side I have done it and it worked fine but upgrading to aluminium helped keep the iat down. Your choice.
6. Spool help. 2.125 hotside, a good cam, ptc converter, tune from someone who knows turbos, good flowing exhaust.
7. Intercooler depends on budget. Treadstone makes a decent intercooler for around your wanted power level but i think your gonna be on the cusp of needing something with a garret core.
8. Silicone couplers. I use eBay specials for my 3 inch stuff. Never had a failure. For 4 inch stuff I go to the local truck shop (in the shop Forman there) and buy 4 inch couplers there. They are good quality for a decent price and every town has a big truck shop to buy them at.
9. If you don't change that cam your power goals will be very hard. Change the cam (tick or lil john) and it will be much easier and more enjoyable. Also 1000 rwhp e85 means a serious fuel system. I run a 450 intake and a magnafuel 4303 as a secondary plumbed to a dedicated sump.

just as an aside for better advise and to get more responses you need to tell us about the car (trans, gear ratio, tires,etc).
just my opinion. By the way I want those prc heads your selling. In gonna check on getting a small loan tomorrow to buy them since I blew my wad on twin turbo upgrade last week. Lol.

973800CamaroRS

iTrader: (3)

Yea I figured I would keep it even with 2.5" hotside so I can just buy one size piping. I ordered a treadstone intercooler which is rated to 900+. I bought flanges machines to accept 2.5" pipe but it is open so I hope it works ok. The kit I have has 2 bovs so might as well use them. Looking to run between 15-22psi My cam is actually a 226/242 115+4. Can always change that and converter down the road. I run dual 450s one being on a boost a pump and have room for a third pump if needed. Car is a 1970 camaro, 3600lbs, 4l80, 3300 stall, 3.70 gear, 28" tire.

Sorry man the heads are sold

jordoza777

iTrader: (2)

Well to bad about the heads. That all sounds pretty good actually. I'd go higher on the rear gear. Do a 331 or higher but that is just me. Our combos have a lot in common honestly. I think you'll be able to reach your goals fairly easily. Are you using genuine borgs or the aftermarket ones.

973800CamaroRS

iTrader: (3)

Gonna put them on and see what happens lol. Can always change to suit my goals which should be easy that it's a 90% street car. Vs racing billet 68s

jordoza777

iTrader: (2)

Let me know how those work for you. I was curious about them myself.

973800CamaroRS

iTrader: (3)

Couldn't beat the deal, this is my first turbo setup ever so just trying to get it right. Not so worried about a number more worried about street manners and learning and moving forward

lmt0705

iTrader: (7)

Build the car with your end goals in mind so your not redoing everything over again. Fuel system is a good example (I've done mine 3 times). Go -10/-8 ptfe, good heavy gauge wiring and good pumps (I run 3 450lph)

973800CamaroRS

iTrader: (3)

Well being I'm totally switching setups I guess I will have that issue regardless. My fuel cell is super simple and its wired for 3 pumps.

transam69230

iTrader: (49)

I would get the proper cam shaft for you goal.

973800CamaroRS

iTrader: (3)

I see tons of guys running ls9 cams with great luck. I really didn't want to dive into the motor as I finally got that running correctly.

973800CamaroRS

iTrader: (3)

Would a 3300 stall be ok with this setup or would a 3800 stall be better ?

jordoza777

iTrader: (2)

I personally have always liked the higher stall but I think 3300 would work ok. It isn't the stall speed you need to change as much as the converter behaviour. My converter is a 4000 stall. Its loose as hell till 4000 rpm. I've heard people say its like a snowmobile. It makes the boost come on quick and you can build it on the line easily. I run a ptc but I've heard people say yank and circle d do well also. A converter set up for a turbo car will make all the difference in the world for spool.

stevieturbo

1. Yes, but no real need for so large.

2. Entirely up to you, but if you are not running divided piping it makes no sense to run a divided housing.

3. Most people dont, they often do it as a band aid for inadequate drain. But every setup is different, and most turbos are different.

4. You could run none, 1 2, or as many or as few as you want. Personal choice really.

5. Exactly what plumbing ? Exhaust will burn powdercoating.

6. No idea exactly which units you are using. But tuning, motor, boost controller, cam etc etc can all play a role.

7. If starting from scratch, use Garrett where possible. Some cheaper ones are Treadstone etc

8. Silicone boots ?

973800CamaroRS

iTrader: (3)

2.5" just makes me ordering pipe easier, since from turbo to intercooler will also be 2.5"

I was recommended 2 divided .91 ar turbos, if I use them with open flanges will it be lazy ?

The hot side I'm having ceramic coated and the cold side I'm gonna have powder coated inside and out.

Tried ordering a treadstone but they are 3-5 months out.

Silicone Couplers.... Don't want ones that are gong to crack or split.

SLOW SEDAN

iTrader: (13)

Which Treadstone are you looking at? I have one for sale and not terribly far from you:

https://ls1tech.com/forums/parts-cla...oler-misc.html

973800CamaroRS

iTrader: (3)

pm sent

roastin240

iTrader: (13)

Ditch that cam. With those heads and turbos, running that cam would be irresponsible and leave a ton of power on the table!

973800CamaroRS

iTrader: (3)

Timing cover is off now so might as well switch, keep the advise coming

roastin240

iTrader: (13)

When you swap cam, make sure it is indexed correctly! Use good valvetrain components as well (i.e. timing chain set, lifters, pushrods, rockers). And you dont need a monster cam to make that power with that combo. I wouldn't go much over 230-235 ish @ 0.050 duration. Will be more streetable and get better mileage and easily make the power. No need for monster lift either. 0.600 ish is fine.