Will this turbo work ok?
#1
Will this turbo work ok?
Hi,
I was thinking about using a T25 for my turbo on my 1.8 and I just thought of a cheap car to take it off. In the UK you get the Rover 220, 420, 620 and 820 all with the same 2.0 turbo engine, with the turbo being a T25. I have had a search and couldn't find any info on here, but I have found the specs for the wheels on a parts website. I don't know how to interpret the numbers though so if possible is anyone be able to tell me whether it has suitable specs?
Compressor Wheel, Garrett - TB2555
Many thanks.
Edit - Trying to find turbine wheel as we speak, also found out the A/R which is 0.49.
I was thinking about using a T25 for my turbo on my 1.8 and I just thought of a cheap car to take it off. In the UK you get the Rover 220, 420, 620 and 820 all with the same 2.0 turbo engine, with the turbo being a T25. I have had a search and couldn't find any info on here, but I have found the specs for the wheels on a parts website. I don't know how to interpret the numbers though so if possible is anyone be able to tell me whether it has suitable specs?
Compressor Wheel, Garrett - TB2555
Many thanks.
Edit - Trying to find turbine wheel as we speak, also found out the A/R which is 0.49.
Last edited by saitrix; 05-01-2009 at 01:13 PM.
#2
If you really want to know...find and plot a compressor flow map.
Find the map, calculate what your flow rates are for 3000rpm and 7000rpm for a given pressure ratio(whatever you plan on running) and draw a straight line connecting those two points. If this line "goes through the center of the island" you're fine as long as the upper rpm point isn't against a surge line, in some really low efficiency, or a really high compressor wheel speed.
Find the map, calculate what your flow rates are for 3000rpm and 7000rpm for a given pressure ratio(whatever you plan on running) and draw a straight line connecting those two points. If this line "goes through the center of the island" you're fine as long as the upper rpm point isn't against a surge line, in some really low efficiency, or a really high compressor wheel speed.
#8
It almost looks like a T2 in size...kinda small, but some of us still go fast with small turbos ;P
You would also want to measure the turbine wheel inducer and exducer.
Then look for a map with those wheel sizes in a T25 housing. Here's a start:
Turbo Size Comparison
You would also want to measure the turbine wheel inducer and exducer.
Then look for a map with those wheel sizes in a T25 housing. Here's a start:
Turbo Size Comparison
#9
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Turbo Size, A/R and Trim
Post #1 and post #8 have good info and good links.
Turbo Size, A/R and Trim
Post #1 and post #8 have good info and good links.
#10
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Turbo Size, A/R and Trim
Post #1 and post #8 have good info and good links.
Turbo Size, A/R and Trim
Post #1 and post #8 have good info and good links.
BTW, I owe you big time with the coolant reroute info!
#11
Come with me if you want to live.
Turbo Size, A/R and Trim
Post #1 and post #8 have good info and good links.
Turbo Size, A/R and Trim
Post #1 and post #8 have good info and good links.
#12
holy ****...finally found it
http://www.not2fast.com/turbo/maps/t25_55_saab.gif
Now follow sixshooters instructions and get some PR plots on there, see what you can run, and if it breaths all the way to redline.
http://www.not2fast.com/turbo/maps/t25_55_saab.gif
Now follow sixshooters instructions and get some PR plots on there, see what you can run, and if it breaths all the way to redline.
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