Maps,ARs,Trim T3 and T2
Turbo Mini Forums

hello,

can someone give me trim and A/R ratio of metro standard T3 and R5 gt turbo standard T2??

Thanks

(And if you have compressor maps of these turbochargers, please send them at oob41@hotmail.com)

Thank you alex.

French turbocharged 998cc

R5 I thought was a 0.48 AR and a 50 trim... but TD thinks "R5GT T2: 50 trim, 0.35 A/R turbine "

The metty T3 is def a 40 trim with a 0.25 AR but this houseing is unavaible new so most rebuilds include a 0.36 AR which makes it the same turbo as a Escort RS Turbo.

Alex

AlexF

I don't know the trim of my T3 but I looked it and I have seen the A/R ratio (written on the housing) which is 0.42.

Do you think they sold me a wrong turbo?

I cannot get the real spec of the metro turbo's one.

Edited by froggy on 19th Aug, 2004.

French turbocharged 998cc

R5: compr.:trim50, AR 0,48; turbine: trim56, A/R 0,35

Metty: compr.: trim40, A/R 0,42; turbine: don't know anymore, but too big. (A/R is written in the housing)
Harry

Bimmer Twinky headed and turboed A-Series:
http://www.minifreunde.at/harry/projects.htm

my figures are for exh houseing AR...

alex

AlexF

Alex, the shiny end of the turbo is the compressor - the trim of this on a R5Gt is 0.48, but pretty irrelevant as they are not critical on garrett turbochargers.
The rusty / dirty end of the turbo is the turbine, which is a 0.35 on the T2.
Ha!

A standard Metro ex housing AR is .25.

LOL!!!!!!!!!

Bimmer Twinky headed and turboed A-Series:
http://www.minifreunde.at/harry/projects.htm

LOL@TD! Thanks for the info Giallofly. Do you also know the trim? (Just to complete my notes)

Bimmer Twinky headed and turboed A-Series:
http://www.minifreunde.at/harry/projects.htm

Why the "LOL"? The standard metros(of with there have been many) i have broken for spares have had .25 cast into the exhaust tubine housing. Did'nt make me laugh though??

Just comfirming a valid question.

Was laughing at TD explaination about the two ends of the turbo. You have been 2 milliseconds faster in typing your answer than me with typing my "LOL"

Bimmer Twinky headed and turboed A-Series:
http://www.minifreunde.at/harry/projects.htm

I see!

I thought it was funny!!!

No idea on the 0.25 Trim, but as per the compressor, it's pretty irrelevant, the A/R will give the better indication of the suitability for power/drive charactersictics / compromises.

As an afterthought - No other Turbo from garrett lists the 0.25 turbine on the T3 range to my knowledge... Certainly, you can't buy them new anymore...

0.25 a/r can't be buy anymore , that's great !!!!!!
T3 are too big, fat and loosy for a mety engine, take the t2 fast /efficient way

Thanks a lot everybody.

What do you think of a T2 fitted on the metro standard exhaust manifold?

Mirage manifold is a bit expensive for me.

French turbocharged 998cc

AlexF

T2 on std mety turbo manifold is a good set up,
flowing well and inexpensive and easy to build.
fab

T3 metro A/R = 0.26. Ford escort MK2 A/R = 0.36.
T2 R5 A/R = 0.35.
Cossy sapphire = 0.48

If the A/R for the metro is any bigger the lag would be out of order. The car would be undrivable. The 0.26 A/R is no longer available, We use a secret combo with a special trim shaft in our turbo units.

Edited by AV-R Technologies on 20th Aug, 2004.

http://www.avonbar.com

mk2?

which cossy saph? 4x4 or rwd?

Alex

AlexF

maybe series 2 RSturbo, and not mk2

Team Racing

arr thats possible Jim...

Alex

AlexF

Aonbar - Not wanting to get into a dispute here, but i doubt very much it would be undrivable... Most of this 'undrivable' crap comes from people running 'clockwork' advance... You stick decent ignition on your car (read dizzyless) and most of the battle is won...