Miatapower List Archive

This read-only message was archived from a public mail list.
Mail From: "Mikael Kallerman" <(email redacted)>

Guru's, I need some help.

In the spirit of planning, I'm thinking of switching my Greddy turbo to something better this winter and am just researching a little. I've come up with a T25, 60 compressor trim and .48A/R turbine housing. I can get this for about $500 by exchanging with the Mitsu turbo. Is this a good deal? I'm after something like 200-210 crank hp (160-170 rwhp) out of my 1.6 with good spoolup characteristics and I guess I can live with a slight torque drop off at the top end if it spools well.

I'll be using my Greddy exh. manifold and will likely make a secondary coolant circuit for the water part (since the turbo is higher than any other part of the cooling system: a pump, transmission cooler and temp probe will work I think). I'll also be upgrading the puny Greddy downpipe at the same time.

Any opinions or comments are welcome!

Mike
91 Greddy (not for long) in Sweden, Link Mk2

This read-only message was archived from a public mail list.
Mail From: "Murray, Richard" <(email redacted)>

I do not know about the turbo sizing, but you should not need a secondary
system for cooling the turbo.

Those small lines should purge themselves of air even though they are up
high. The heater lines go up higher than the radiator cap and they purge. In
the worst case all you would have to do is place a small T-fitting in the
line. You should also use metal tubing near the exhaust manifold.

-----Original Message-----
From: Mikael Kallerman [mailto:(email redacted)]
Sent: Friday, August 09, 2002 4:02 AM
To: (email redacted)
Subject: Turbo sizing q

Guru's, I need some help.

In the spirit of planning, I'm thinking of switching my Greddy turbo to
something better this winter and am just researching a little. I've come up
with a T25, 60 compressor trim and .48A/R turbine housing. I can get this
for about $500 by exchanging with the Mitsu turbo. Is this a good deal? I'm
after something like 200-210 crank hp (160-170 rwhp) out of my 1.6 with good
spoolup characteristics and I guess I can live with a slight torque drop off
at the top end if it spools well.

I'll be using my Greddy exh. manifold and will likely make a secondary
coolant circuit for the water part (since the turbo is higher than any other
part of the cooling system: a pump, transmission cooler and temp probe will
work I think). I'll also be upgrading the puny Greddy downpipe at the same
time.

Any opinions or comments are welcome!

Mike
91 Greddy (not for long) in Sweden, Link Mk2

This read-only message was archived from a public mail list.
Mail From: "Mikael Kallerman" <(email redacted)>

Good point, but what about when I shut the engine off and heat builds up, won't it boil and thus create a lot of gas? Into which line do I insert the turbo? i'm guessing the small one that comes out the the thermo housing and goes to the right and then down to the water pump.

Mike

----- Original Message -----
From: "Murray, Richard" <(email redacted)>
To: "'Mikael Kallerman'" <(email redacted)>; <(email redacted)>
Sent: Friday, August 09, 2002 5:17 PM
Subject: RE: Turbo sizing q


> I do not know about the turbo sizing, but you should not need a secondary
> system for cooling the turbo.
>
> Those small lines should purge themselves of air even though they are up
> high. The heater lines go up higher than the radiator cap and they purge. In
> the worst case all you would have to do is place a small T-fitting in the
> line. You should also use metal tubing near the exhaust manifold.
>
> -----Original Message-----
> From: Mikael Kallerman [mailto:(email redacted)]
> Sent: Friday, August 09, 2002 4:02 AM
> To: (email redacted)
> Subject: Turbo sizing q
>
> Guru's, I need some help.
>
> In the spirit of planning, I'm thinking of switching my Greddy turbo to
> something better this winter and am just researching a little. I've come up
> with a T25, 60 compressor trim and .48A/R turbine housing. I can get this
> for about $500 by exchanging with the Mitsu turbo. Is this a good deal? I'm
> after something like 200-210 crank hp (160-170 rwhp) out of my 1.6 with good
> spoolup characteristics and I guess I can live with a slight torque drop off
> at the top end if it spools well.
>
> I'll be using my Greddy exh. manifold and will likely make a secondary
> coolant circuit for the water part (since the turbo is higher than any other
> part of the cooling system: a pump, transmission cooler and temp probe will
> work I think). I'll also be upgrading the puny Greddy downpipe at the same
> time.
>
> Any opinions or comments are welcome!
>
> Mike
> 91 Greddy (not for long) in Sweden, Link Mk2

This read-only message was archived from a public mail list.
Mail From: "Murray, Richard" <(email redacted)>

You are correct, you will get boiling and steam when you shut down the
engine. You would have the same effect even if your turbo were mounted down
lower because of metal to metal conduction. After the engine cools down, the
steam will condense back into water and get rid of the bubble.

As some one else pointed out to me, a secondary pump may be overkill. I am
toying with the idea of hooking up a second thermo-switch and a small
secondary battery to work the drivers side fan when the car is shut off. Of
course a hole in the hood/bonnet would help too.

You are correct about which coolant lines to use.

-----Original Message-----
From: Mikael Kallerman [mailto:(email redacted)]
Sent: Friday, August 09, 2002 2:53 PM
To: Murray, Richard; (email redacted)
Subject: Re: Turbo sizing q

Good point, but what about when I shut the engine off and heat builds up,
won't it boil and thus create a lot of gas? Into which line do I insert the
turbo? i'm guessing the small one that comes out the the thermo housing and
goes to the right and then down to the water pump.

Mike

----- Original Message -----
From: "Murray, Richard" <(email redacted)>
To: "'Mikael Kallerman'" <(email redacted)>; <(email redacted)>
Sent: Friday, August 09, 2002 5:17 PM
Subject: RE: Turbo sizing q


> I do not know about the turbo sizing, but you should not need a secondary
> system for cooling the turbo.
>
> Those small lines should purge themselves of air even though they are up
> high. The heater lines go up higher than the radiator cap and they purge.
In
> the worst case all you would have to do is place a small T-fitting in the
> line. You should also use metal tubing near the exhaust manifold.
>
> -----Original Message-----
> From: Mikael Kallerman [mailto:(email redacted)]
> Sent: Friday, August 09, 2002 4:02 AM
> To: (email redacted)
> Subject: Turbo sizing q
>
> Guru's, I need some help.
>
> In the spirit of planning, I'm thinking of switching my Greddy turbo to
> something better this winter and am just researching a little. I've come
up
> with a T25, 60 compressor trim and .48A/R turbine housing. I can get this
> for about $500 by exchanging with the Mitsu turbo. Is this a good deal?
I'm
> after something like 200-210 crank hp (160-170 rwhp) out of my 1.6 with
good
> spoolup characteristics and I guess I can live with a slight torque drop
off
> at the top end if it spools well.
>
> I'll be using my Greddy exh. manifold and will likely make a secondary
> coolant circuit for the water part (since the turbo is higher than any
other
> part of the cooling system: a pump, transmission cooler and temp probe
will
> work I think). I'll also be upgrading the puny Greddy downpipe at the same
> time.
>
> Any opinions or comments are welcome!
>
> Mike
> 91 Greddy (not for long) in Sweden, Link Mk2