How to interpret Compressor maps, technical post.
#1
How to interpret Compressor maps, technical post.
Someone in another thread said I should post a link to this as they found it interesting and thought some other people on here would too, its a reply I made on vauxsport to a guy who was asking about how you interpret compressor maps, and ive tried to write it in a way thats simple to understand for people with little or not experience of turbo compressor maps, and its fairly well illustrated with graph examples and how you read them etc.
http://www.vauxhallsportforum.com/ph...urbos-t92.html
http://www.vauxhallsportforum.com/ph...urbos-t92.html
#4
PassionFord Post Whore!!
Spot on it not really that difficult to understand but it still doesnt help me in deciding what turbo will suit my spec best.
Any advice i'm after around 350 400bhp mark in a 1.8 20vt vag motor.
I've heard people use the gt28rs but there on there arse at 400bhp apparently and there is a load of different spec gt28's
Any advice i'm after around 350 400bhp mark in a 1.8 20vt vag motor.
I've heard people use the gt28rs but there on there arse at 400bhp apparently and there is a load of different spec gt28's
#5
Originally Posted by Alps Pacino
Spot on it not really that difficult to understand but it still doesnt help me in deciding what turbo will suit my spec best.
Any advice i'm after around 350 400bhp mark in a 1.8 20vt vag motor.
I've heard people use the gt28rs but there on there arse at 400bhp apparently and there is a load of different spec gt28's
Any advice i'm after around 350 400bhp mark in a 1.8 20vt vag motor.
I've heard people use the gt28rs but there on there arse at 400bhp apparently and there is a load of different spec gt28's
2871 would manage a little better.
Personally i would just use a T34 probably, despite it not being trendy and ball bearing etc, cheap, strong, easy to rebuild, cheap to get parts for.
And best of all, can easily be converted to a UT38 if you need it later on.
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http://www.turbobygarrett.com/turbob...ch_center.html
This is also a very good read. As for what turbo if you understand the compressor maps you should be able to determine what spec turbo.
http://www.turbobygarrett.com/turbob...ochargers.html
Here is the entire Garrett range with compressor maps just have a look through them
This is also a very good read. As for what turbo if you understand the compressor maps you should be able to determine what spec turbo.
http://www.turbobygarrett.com/turbob...ochargers.html
Here is the entire Garrett range with compressor maps just have a look through them
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#8
Originally Posted by Billabong
'trim' isn't the angle of the blades Chip...... NOT trying to pick faults, but that's as bad as 'wastegate chatter'
But yes you are correct that a more accurate explanation would have been to mention the inducer and exducer areas
#10
PassionFord Post Whore!!
Never thought of a t34 with .63 exhaut housing i take it you mean, thats what i used on my old cossie and liked it cause it used to build the boost up rather than be punchy like my old t3.
Whats the pros and cons of the same spec gt series turbo over the t34 though cause i dont mind spending the cash to get a good spec well usable motor. O and i'm looking t external wastegates to
Whats the pros and cons of the same spec gt series turbo over the t34 though cause i dont mind spending the cash to get a good spec well usable motor. O and i'm looking t external wastegates to
#11
Originally Posted by Alps Pacino
Never thought of a t34 with .63 exhaut housing i take it you mean, thats what i used on my old cossie and liked it cause it used to build the boost up rather than be punchy like my old t3.
Whats the pros and cons of the same spec gt series turbo over the t34 though cause i dont mind spending the cash to get a good spec well usable motor. O and i'm looking t external wastegates to
Whats the pros and cons of the same spec gt series turbo over the t34 though cause i dont mind spending the cash to get a good spec well usable motor. O and i'm looking t external wastegates to
The T34 will be laggier than the GT2871 or similar.
So the GT is kind of "better" from that respect, but i just like the toughness of T series turbos.
You wont really need an external gate, but if you want to be too noisey for tracks feel free, lol
#13
Originally Posted by S1 Barkham
This is the diagram off that Garrett website with regards to trim
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I know what you meant Chip, but it's not like a .xx trim has a 45 degree angle, and so on, was just clarifying for others before it turned up on Top Gear
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I like the idea of being able to work out what my tubby is capable of but I cant find a map
Pulsar GTi-R:
T-28, 60 trim 60 mm BCI-1 compressor in standard T-3
housing. 79 trim 53.8mm Inco T-250 turbine wheel .86
A/R turbine housing.
Pulsar GTi-R:
T-28, 60 trim 60 mm BCI-1 compressor in standard T-3
housing. 79 trim 53.8mm Inco T-250 turbine wheel .86
A/R turbine housing.
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