I have one T3 Turbo, Could I Modify one header for low boost?

[shttygtstang]

go to a junkyard its a risk but i picked one up for a custom project from a eclipse fo 100 bucks

 

[88stangmangt]

**** i wouldnt want anything from a eclipse. would pull one off a old turbo coupe if i wanted one but i got the good ol' VORTECH.

 

[shttygtstang]

there the same t25 t25

 

[BlackFox5.0]

Yeah I got it all covered,

Im gonna search for this turbos twin, and twin intercoolers, Or ill weld them together,

run low boost

and have some fun

Twin intercoolers? You use one big single one. You really need to do some more research. What car did the turbo come from? Whats the A/R? Most T3 turbo wastegates are calibrated to open at no more than 10psi.

 

[Starscream88]

Its a Garrett T3,

Exhaust A/R 48 Compressor A/R 42

You can use twin intercoolers, Not a problem

However you obviously need a "Y" piece to connect them both after cooling,

And the Turbo Actuators do open lower than 10 Psi.
With an ajustable Actuator Rod you just keep turning for "more" or "Less"

With two Identical Turbos, Id start with counting the threads, The longer the Actuator Rod the less boost the turbos would produce,

I have some pics I just took of the turbo,
Im gonna re-size them and post them if anyones interested?

 

[Ray III]

you don't need to intercool a turbocharged motor... especially when you don't want to go nuts with power output anyways.

I don't like leaf-blowers ("centrifugal superchargers") because they waste horsepower by being belt driven. Turbocharging rather takes advantage of exhaust energy that is residual from the combustion process that would otherwise be mostly wasted.

The exception is positive-displacement blowers, cause they make boost NOW and make the same boost up to redline.

 

[Michael Yount]

Ray! "you don't need to intercool a turbocharged motor" Any time air is compressed, it's also heated - doesn't matter whether it's a belt driven compressor or an exhaust driven compressor. In fact, turbos probably put more heat in the intake stream because of the exhaust turbine's close proximity to the compressor turbine. Turbo boost requires intercooling just like supercharger boost does -- unless you want to run it pig rich with no timing (just like with a supercharger) to avoid detonation. Besides - it's free HP. All else equal, you gain 1/2% to 1% HP for each 10F decrease in intake air temp. You definitely want to intercool a turbocharged motor.

Saab (who have as much or more experience with turbocharged engines as anyone else out there) recently offered a low-pressure turbo on their 3.0L V-6 that was configured just exactly like what was proposed here. Only one bank of 3 cylinders was hooked to the turbo -- the other 3 cylinders were exhausted as they would normally be. The result was a low pressure turbo that didn't produce huge peak HP numbers, but made exceptional torque low in the rpm range. A set up like that can definitely be made to work - but as with anything else innovative and unique, it's gonna take resources to make it work well. A bit of trial and error engineering. The turbo should be sized for about half the 5.0L's size (something that came off of a 2.2-2.5L four cylinder ought to work) since it's dealing with only one bank of the V-8's cylinders.

 

[mr_woodster]

if i were doing a twin turbo v8, i would use the bigger T3 that in turbocoupes, merkur's ,cougar's (God forbid) and SVO's. Here is a good list to go by (credit due :http://fordturbo.com/mainframe.html)

===========
What cars have what size turbo?
83-84 GT Turbo .60 & .63 A/R
83-84 Capri RS Turbo .60 & .63 A/R
84-86 XR7 Coug .60 & .63 A/R
84-85 SVO .60 & .63 A/R
85.5-86 Svo .60 & .48 A/R
83-86 TC .60 & .63 A/R
87-88 TC IHI Turbo
Early 85 XR4TI .60 & .63 A/R
85.5-89 XR4TI .60 & .48 A/R
================

the .48 hotside is ok, but the .63 would be better for less back pressure that the larger displament would create.
These numbers are usualy stamped on the compressor housing...so keep your eyes open.

 

[Starscream88]

So Michael your saying I "Could" do this?

Would this turbo I have be sufficiant?
Or should I look for a bigger Exhaust compressor?

heres some pics guys,
Not bad for an old Turbo huh

 

[Michael Yount]

I'm saying if OEM's have done it, there's certainly potential there. As for the proper turbo - I can't help you there. I know a lot of folks out there tend to think a turbo is a turbo - that they're some kind of commodity you just bolt on for more power. And of course it doesn't work that way. To make the system work well you need someone to help you pick the proper size turbo, A/R ratio, etc. so that it's capable of handling the flows on both sides of the turbine, and making boost where you want it to. The nice thing about just tapping into one side of the exhaust flow is that it simplifies the plumbing. If you decide to go this way, let us know how it works out.

 

[cjman15]

not too bad at all

 

[Starscream88]

What I might do is find this ones twin,

Try this out on one header, see if it runs ok,

If it does ill leave it, If not then I have the other one standing by for the other side,

I mean im not going to do this right now,
but soon,
I want to get all the bits first

 

[shttygtstang]

i say go for it but ill let you know there wont be a big gain maybe 30 hp that small turbo needs to be cooled down though use a intercooler