North American Turbocoupe Organization



t3/t4 turbo
BabyBlueBird Offline
Junior Member
#1
Been planning out a potential build for my turbo coupe and I have pretty much set my sites on going for the garret t3/t4 50 trim turbo. Looks like most people are running a .63 A/R and a 2.5" v band. Any recommendations on where to buy the turbo from?
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Chas K 88 Offline
Member
#2
I've been looking at them on bo-port.com. but I haven't figured out what to do about the vacuum hose that connects to the port on the inlet flange of the factory turbo yet. All of them I've seen are set up for a hose to connect to the inlet side, I'm gonna watch this thread for answers to a question I haven't asked yet :-)
Everyone on here will tell you to stay away from the ebay "deals".
Chas K.
88 T-bird, 5 speed, Wiseco pistons, Gillis valve, 255LPH fuel pump, CD, tripminder, RR cam, K&N, 140 MPH speedo conversion (thanks Jeff K).
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Kuch Offline
Senior Member
#3
I suggest BoPort as well for his turbos, he is great to work with if you have any questions as well, https://www.bo-port.com/index.php?act=vi...oductId=70 . Chas, pretty sure that the hose which connects to the inlet is simply the hose which connects to the breather at the back of the valve cover. When I did my turbo swap, I ran a longer hose from the breather along the fender well to a hole that I made in the back side of my K&N filter that is mounted up front. This way the breather can still have its vapors pulled into the intake.
1988 Turbo Coupe, Black/Black, 5 Speed, Moonroof,  T3/T4, ported E6, 255LPH, Kirban, Stinger Exhaust, MGW shifter, K&N, Gillis valve, BP1.5, PIMPx, Koni's
1964 Ford Galaxie 500XL, 390 6V, Big Solid cam, Headers,3.89's, 4 Speed, Vast and fast
1960 Ford Starliner, 292 Y Block, 312 4bbl intake, headers, 3 Speed, slow and low
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Chas K 88 Offline
Member
#4
Oh, that hose too, thanks for the tip. I was referring to the small vacuum line/port on the turbo inlet near that bigger line. Mine goes from the inlet to a 2-port fitting that is screwed into the inter-cooler. The other port of that goes to the cruise control. Maybe mine is wrong, I don't know how it even works when there could be boost present at any given time when under cruise and the IC is going to put pressure on that line. It would make more sense to me to bypass the IC and connect directly to the turbo inlet port, it never sees boost. Do you even need that because it also ties in to the vacuum tree on the firewall.
Chas K.
88 T-bird, 5 speed, Wiseco pistons, Gillis valve, 255LPH fuel pump, CD, tripminder, RR cam, K&N, 140 MPH speedo conversion (thanks Jeff K).
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BabyBlueBird Offline
Junior Member
#5
Thank you for the input. I'm sure ill be back on here asking more questions once I start to tackle things this winter. Gonna start with a front mount and exhaust. I've been reading a lot about pimpx and bo port cylinder head stuff, Alot to learn.
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BradM Offline
Member
#6
I did the T3/T4 turbo as well and I simply plugged the boost reference for the cruise control and the cruise control still works fine. I read somewhere that this reference has something to do with a wide-open-throttle condition when using cruise. My cruise works fine. As Kuch says, the other line is for the PCV system. I installed a new port on my intake tube for this breather line. When not under boost, there is a PCV check-valve (under the throttle body) that is pulsed open and closed (like a traditional PCV valve). When under boost, this valve closes and crankcase pressure is relieved using the breather line you are referencing. It needs to be tied to the intake so that a vacuum is seen at the breather.

Talk to Bo-Port for the turbo selection but don't cheap-out on the exhaust side. Do a manifold and exhaust upgrade at the same time. More bang-for-buck on the exhaust side IMHO. Then PiMPx, fuel pump, and injectors are next because you'll be starved for fuel. Then a better clutch for the T5 (it WILL slip with the new torque). Only then would I look at a head but your trans may not be able to handle it.
1965 Mercury Comet Caliente; 1968 Mercury Monterey; 1969 F100 Ranger; 1987 Thunderbird Turbo Coupe
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BabyBlueBird Offline
Junior Member
#7
Appreciate the input Brad. I was looking at the gnari manifold and stinger full exhaust system to replace the original stuff as well as the stinger front mount kit. For the Pimpx system do you know if you can stay with distributor ignition or have to go to a coil and plug system? They offer a few different kits on there site.
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BradM Offline
Member
#8
I kept the OEM distributor with no issues.
1965 Mercury Comet Caliente; 1968 Mercury Monterey; 1969 F100 Ranger; 1987 Thunderbird Turbo Coupe
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BabyBlueBird Offline
Junior Member
#9
Which kit did you buy from stinger? They have a few. This is one of the main areas I’ve been having a hard time figuring out what to do.
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BradM Offline
Member
#10
PiMPx. It's for our batch-fire engines. You'll need an 02 sensor (I went with AEM).
1965 Mercury Comet Caliente; 1968 Mercury Monterey; 1969 F100 Ranger; 1987 Thunderbird Turbo Coupe
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