Going from a single turbo to twins
#1
Going from a single turbo to twins
Well, I've decided to go from a single turbo setup to a twin turbo setup. Here is where I'm at right now(see pic). These are Master Power T70's with a .68 exh ar. Also I am waiting for a different set of turbo manifolds. I will post progress as it comes.
#4
Re: Going from a single turbo to twins
First peice of the puzzle has arrived. I'm quite impressed with the quality of these headers. My only issue is with the Trick Flow G1 heads I will need to clearance the bottom of the flanges a little bit so I may change the spark plugs with ease.
I am still figuring out where I will place the turbos .
I am still figuring out where I will place the turbos .
Last edited by Badass355ciz28; 11-09-2015 at 07:15 PM.
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#21
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Re: Going from a single turbo to twins
Well i am anti fender exit. Gotta run pipes out the back of the bay or the front and curl to the back. Thats it. Mine looks like alot of plumbing but where else can you go?
Redoing this i would attempt to go down in front of the car under or thru kmember.
I dont know how much power a manifold would support. Banks claimed alot of power on that but all the serious 1200+ hp guys run headers that i know of.
On a street car that wants under a 1000, i suppose they can work great but NOT worth the money imo for banks. I would fab my own log
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Car: '88 Formula, '94 Corvette, '95 Bird
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Transmission: T5, Zf6, 4L60E
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Re: Going from a single turbo to twins
I dont know how much power a manifold would support. Banks claimed alot of power on that but all the serious 1200+ hp guys run headers that i know of.
On a street car that wants under a 1000, i suppose they can work great but NOT worth the money imo for banks. I would fab my own log
On a street car that wants under a 1000, i suppose they can work great but NOT worth the money imo for banks. I would fab my own log
-- Joe
#23
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Re: Going from a single turbo to twins
Pics of banks thirdgens? I am very curious how you fit any downpipe on driver side. Booster/master and steering shaft make it difficult. 3" minimum pipe for big hp
More the merrier lol
And you dont need all the heat in the world to make turbos work. Proper header design still has velocity and more directed flow. Manifolds are not efficient flow devices. They work but the flow isnt clean. Can easily have cylinder to cylinder contamination/reversion effects
There is a place for them in tight spots but driver side on twin setups is always a problem with exhaust routing no matter what setup you use
More the merrier lol
And you dont need all the heat in the world to make turbos work. Proper header design still has velocity and more directed flow. Manifolds are not efficient flow devices. They work but the flow isnt clean. Can easily have cylinder to cylinder contamination/reversion effects
There is a place for them in tight spots but driver side on twin setups is always a problem with exhaust routing no matter what setup you use
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Car: '88 Formula, '94 Corvette, '95 Bird
Engine: LC9, 355" LT1, LT1
Transmission: T5, Zf6, 4L60E
Axle/Gears: 3.42, Dana44 3.45, 3.23
Re: Going from a single turbo to twins
Pics of banks thirdgens? I am very curious how you fit any downpipe on driver side. Booster/master and steering shaft make it difficult. 3" minimum pipe for big hp
More the merrier lol
And you dont need all the heat in the world to make turbos work. Proper header design still has velocity and more directed flow. Manifolds are not efficient flow devices. They work but the flow isnt clean. Can easily have cylinder to cylinder contamination/reversion effects
There is a place for them in tight spots but driver side on twin setups is always a problem with exhaust routing no matter what setup you use
More the merrier lol
And you dont need all the heat in the world to make turbos work. Proper header design still has velocity and more directed flow. Manifolds are not efficient flow devices. They work but the flow isnt clean. Can easily have cylinder to cylinder contamination/reversion effects
There is a place for them in tight spots but driver side on twin setups is always a problem with exhaust routing no matter what setup you use
I'm not saying headers don't work, obviously you guy's are in the 8s and streetable. I'm saying that it's not for me. Personal choice.
-- Joe
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Car: 87 Iroc
Engine: Turbocharged 5.7 Pro-Fl-XT
Transmission: 700R4 for moment
Axle/Gears: 3.25 9 inch
Re: Going from a single turbo to twins
I can see why everyone just does front exits on twins. I may be fighting this battle too soon if I elect to do twins. I'm not afraid to fire up my plasma cutter any more though!
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Re: Going from a single turbo to twins
T04b's. Im unsure of exhaust size, as those parts were gone by the time I bought the car. I do know that in the mid 90s the car made around 500rwhp on pump gas through a th400/9" and cats. Passed emissions and ran fairly low boost with no intercooler. Was fast at the time. Lol
#33
Re: Going from a single turbo to twins
I got some more progress done tonight with the 90 degree bends and the flanges off of the headers. I also decided to remove the center section of the radiator support since I am making a little more clearance for everything including a new radiator.
Last edited by Badass355ciz28; 11-11-2015 at 11:29 PM.
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Car: '88 Formula, '94 Corvette, '95 Bird
Engine: LC9, 355" LT1, LT1
Transmission: T5, Zf6, 4L60E
Axle/Gears: 3.42, Dana44 3.45, 3.23
Re: Going from a single turbo to twins
What is the plan to brace the turbos? My experience with those vbands is they leak if any stress is put on them.
Looks great though. Nice clean routing.
Downpipes going under the k-member or over? 2.5" ?
-- Joe
Looks great though. Nice clean routing.
Downpipes going under the k-member or over? 2.5" ?
-- Joe
#39
Re: Going from a single turbo to twins
I will also be making a new lower radiator support and installing a new radiator. 28"x16" to fit nicely in there.
the v bands have a lip on one side which fits into the other end which should eliminate any leaks. I haven't had any issues with the v bands on my single setup which didn't leak.
Also I will be doing 3" down pipes down between the engine and k member and hope to merge them into my 4" cat back exhaust that I just did last year.
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Car: '88 Formula, '94 Corvette, '95 Bird
Engine: LC9, 355" LT1, LT1
Transmission: T5, Zf6, 4L60E
Axle/Gears: 3.42, Dana44 3.45, 3.23
Re: Going from a single turbo to twins
Nice!
You doing this at your house or at work?
-- Joe
You doing this at your house or at work?
-- Joe
#47
Re: Going from a single turbo to twins
As promised I was able to fab up and complete the lower support as well. I am now waiting on a box of 3" tubing from WWW.Mandrelbends.Com.
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Car: 89 RS 89 iroc 87 firebird
Engine: 3.1 Turbo/ 355 twin turbo
Transmission: a4 w/ 4500 stall/ a4 / t5
Axle/Gears: strange s60 /w 3:42's
Re: Going from a single turbo to twins
what do u think of those cast elbows?, was thinking about going the same route this winter when i go back to twins