hey guys,
i know this really ain't the place for this sort of question but i
was just curious to know about it. is it possible to bolt on a WRX
turbo to the legacy GT?
i know someone who's thinking about doing this as he already has the
WRX turbo. what he's planning to do is switch his secondary turbo to
primary, and put the WRX one as secondary.
i understand that there will definitely need to be some sort of
modification to the way it bolts on since the GT turbos are smaller.
of course, there'll be more power for less boost but if this is
possible about how much extra power can be expected?
cheers!
WRX turbo into Legacy GT
Moderators: Helpinators, Moderators
-
Z1Auto@aol.com
WRX turbo into Legacy GT
I am not famialr with the Subaru twin turbo setup..is it truly primary and
secondary, or are both on at once? If it is a true sequential (ala RX7),
then why not change it oso both come on at once...loads less work and on most
cars, provides an awesome change in performance.
Switching to two turbos with different spool characteristics couldbe a tough
one to tune for, and would certainly require some form of fuel/ignition
control to take advantgae of the different qualities each turbo has
secondary, or are both on at once? If it is a true sequential (ala RX7),
then why not change it oso both come on at once...loads less work and on most
cars, provides an awesome change in performance.
Switching to two turbos with different spool characteristics couldbe a tough
one to tune for, and would certainly require some form of fuel/ignition
control to take advantgae of the different qualities each turbo has
-
Josh Colombo
WRX turbo into Legacy GT
The subaru twin turbo setup is a true sequential turbo setup. The
primary is smaller ball bearing or roller bearing turbo to provide
little to no lag boost at low rpms. Then the secondary comes in
at higher rpms to provide more boost.
Some things to take in consideration when dealing with the TT setup
is that the smaller primary turbo can be overspooled very easily
if you go to a larger exhaust.
As adam mentioned going to a larger secondary turbo could cause you
more problems then it's worth.
I guess it's possible to have both turbo's come on at once, but that's
an entire different can of worms.....because they are different sizes,
and flow different amounts.
In Japan some have completely done away with the twin setup, and
gone to a single larger turbo. It'll probably make more power...
.but then you sacrifice low end power, and turbo lag.
So it's a trade-off.....depends on what you want to do.
Josh
primary is smaller ball bearing or roller bearing turbo to provide
little to no lag boost at low rpms. Then the secondary comes in
at higher rpms to provide more boost.
Some things to take in consideration when dealing with the TT setup
is that the smaller primary turbo can be overspooled very easily
if you go to a larger exhaust.
As adam mentioned going to a larger secondary turbo could cause you
more problems then it's worth.
I guess it's possible to have both turbo's come on at once, but that's
an entire different can of worms.....because they are different sizes,
and flow different amounts.
In Japan some have completely done away with the twin setup, and
gone to a single larger turbo. It'll probably make more power...
.but then you sacrifice low end power, and turbo lag.
So it's a trade-off.....depends on what you want to do.
Josh
-
smileysock
WRX turbo into Legacy GT
So you saying that if you switch the turbos around like the setup I
mentioned that it may not respond properly? Because the primary then
would still be the smaller of the two turbos.
I dunno technically how all this stuff works but logically it would
seem to work just with more power hehe.
Ok I'll tell you other mods my friend has done so far to give you
guys a better idea in your response/suggestions. Exhaust is 3" i
think and has an air filter pod, type 2 bov on the primary turbo and
a manual boost controller.
Basically I just want to know if it is actually possible for this
setup to successfully work thus giving increased power. Pros and cons
too perhaps.
Oh and with regard to the parallel turbos (non-sequential), it is
possible to do it with the GT. There's a Japanese website that shows
you with pictures how to change your sequential TT to parallel. Of
course it's a bitch trying to read all the Jap 'cause I studied it
until halfway in high school. But yes, that's a different ball park
to what I'm talking about...
Cheers!
mentioned that it may not respond properly? Because the primary then
would still be the smaller of the two turbos.
I dunno technically how all this stuff works but logically it would
seem to work just with more power hehe.
Ok I'll tell you other mods my friend has done so far to give you
guys a better idea in your response/suggestions. Exhaust is 3" i
think and has an air filter pod, type 2 bov on the primary turbo and
a manual boost controller.
Basically I just want to know if it is actually possible for this
setup to successfully work thus giving increased power. Pros and cons
too perhaps.
Oh and with regard to the parallel turbos (non-sequential), it is
possible to do it with the GT. There's a Japanese website that shows
you with pictures how to change your sequential TT to parallel. Of
course it's a bitch trying to read all the Jap 'cause I studied it
until halfway in high school. But yes, that's a different ball park
to what I'm talking about...
Cheers!
-
Josh Colombo
WRX turbo into Legacy GT
At Saturday, 12 October 2002, you wrote:
>So you saying that if you switch the turbos around like the setup I
>mentioned that it may not respond properly? Because the primary then
>would still be the smaller of the two turbos.
>
It's possible.....I don't know....You could put a larger turbo on
for the secondary and get more boost, i.e. more power. You'd retain
the smaller primary for better low end. However the split point
or point where the turbo's swap over may not be ideal, i.e. you may
end up with some undesirable turbo lag.
>I dunno technically how all this stuff works but logically it would
>seem to work just with more power hehe.
>
>Ok I'll tell you other mods my friend has done so far to give you
>guys a better idea in your response/suggestions. Exhaust is 3" i
>think and has an air filter pod, type 2 bov on the primary turbo and
>a manual boost controller.
>
>Basically I just want to know if it is actually possible for this
>setup to successfully work thus giving increased power. Pros and cons
>too perhaps.
It's possible, I think you should look and see if there are any kits,
or turbo's that are a specific upgrade for the secondary turbo.
There's a lot of variables and design that goes into the TT setup.
...more so then the single turbo setup.....so there's also more
that could go wrong.
Josh
>So you saying that if you switch the turbos around like the setup I
>mentioned that it may not respond properly? Because the primary then
>would still be the smaller of the two turbos.
>
It's possible.....I don't know....You could put a larger turbo on
for the secondary and get more boost, i.e. more power. You'd retain
the smaller primary for better low end. However the split point
or point where the turbo's swap over may not be ideal, i.e. you may
end up with some undesirable turbo lag.
>I dunno technically how all this stuff works but logically it would
>seem to work just with more power hehe.
>
>Ok I'll tell you other mods my friend has done so far to give you
>guys a better idea in your response/suggestions. Exhaust is 3" i
>think and has an air filter pod, type 2 bov on the primary turbo and
>a manual boost controller.
>
>Basically I just want to know if it is actually possible for this
>setup to successfully work thus giving increased power. Pros and cons
>too perhaps.
It's possible, I think you should look and see if there are any kits,
or turbo's that are a specific upgrade for the secondary turbo.
There's a lot of variables and design that goes into the TT setup.
...more so then the single turbo setup.....so there's also more
that could go wrong.
Josh