turbo specs

4148 Views 19 Replies 11 Participants Last post by grizzly, Nov 18, 2008

kamip

Discussion Starter · Jul 25, 2008

Does anyone know the CFM of the stock turbo? What about the upgraded turbos?

1 - 20 of 20 Posts

chittychittybangbang

· #2 · Jul 26, 2008

Not sure about upgraded turbos, I'll try to put together a chart. Of the top of my head, not sure the CFM but it can handle about 15-20 psi in normal driving, stock setup.

More specs below.

COMPRESSOR STAGE:
Wheel Trim - 56
Wheel Diameter (inch)
inside dia. - 1.29
outside dia. - 1.73
Hsg A/R - 0.33
Max Flow - 18 pounds per minute

TURBINE STAGE:
Wheel Trim - 70
Wheel Diameter (inch)
inside dia. - 1.42
outside dia. - 1.69
Turbine A/R - 0.65

COMPRESSOR CONFIGURATION (inch):
Hose inlet - 1.75
Hose outlet - 1.50
TURBINE CONFIGURATION:
Hose inlet: 3 bolt inlet
Hose outlet: 3 bolt outlet

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pearlgolf

· #3 · Jul 26, 2008

I think I remember about 280 CFM. Can't find where I saw it though.

kamip

Discussion Starter · #4 · Jul 27, 2008

Thanks, something like how much power it has, price, what you need to install, etc. would be nice.

gino5

· #5 · Aug 7, 2008

I think that a problem you are going to see is that many aftermarket turbo makers who make "hybrid" turbos won't want their specs released or don't give out that information because then other people can copy it. You are best making an estimate of how much power it will make with approprite supporting mods.

chittychittybangbang

· #6 · Aug 7, 2008

gino5 said:
I think that a problem you are going to see is that many aftermarket turbo makers who make "hybrid" turbos won't want their specs released or don't give out that information because then other people can copy it. You are best making an estimate of how much power it will make with approprite supporting mods.

I've been trying to put together a list but that is the exact problem.

kamip

Discussion Starter · #7 · Aug 26, 2008

How about just a link page to the vendors then? Let the vendors talk about the turbo themselves.

chittychittybangbang

· #8 · Aug 27, 2008

I was working on it but these things take a while to put together. Thanks for your patience.

chittychittybangbang

· #9 · Sep 8, 2008

A turbo upgrade chart is up. It covers all TDI for the US/Canada market. There's room for improvement so expect it to change in the future.

See here:

http://www.myturbodiesel.com/1000q/tditurbo.htm

It's not possible to list all the CFM , possible PSI that they can support, how much power it makes, etc, since these figures are not known, the vendors don't want to give them out since it would be propriety info, or because those values are highly subjective and vary by car, setup, tuning, etc.

fstjetta

· #10 · Sep 8, 2008

Thanks, I think that's a great idea!

blupearl

· #11 · Sep 9, 2008

I'm surprised you can't figure out which turbos are being used by looking at the garret turbo website. Although I suppose they are making some mods to them and using street toys as well.

Fluid

· #12 · Sep 11, 2008

I doubt the hybrid makers would give out their specs because it's proprietary info.

chittychittybangbang

· #13 · Sep 11, 2008

I'll ask and if there are any updates they'll go up.

grizzly

· #14 · Sep 13, 2008

Don't forget that a lot of these mods are by trial-error engineering. That's not necessarily a bad thing if it produces a good product that ends up being a retail product but in thoses cases you won't have a flow chart, you might get a CFM estimate, but you should have at least the wheel sizes. The tweaks to the housings will also effect things. And of course tuning makes a big difference too.

chittychittybangbang

· #15 · Sep 13, 2008

grizzly said:
Don't forget that a lot of these mods are by trial-error engineering. That's not necessarily a bad thing if it produces a good product that ends up being a retail product but in thoses cases you won't have a flow chart, you might get a CFM estimate, but you should have at least the wheel sizes. The tweaks to the housings will also effect things. And of course tuning makes a big difference too.

Yes, that adds to the difficulty of getting specs. It's best to contact the vendor directly to see what supporting mods you need and compare. This list is just so one can quickly see what's out there.

chittychittybangbang

· #16 · Sep 15, 2008

Made some major additions, added specs for many mk4 turbos.

iansw

· #17 · Sep 16, 2008

A flying TDI? That would be cool. 2nd on budget being first. No point in buying a huge turbo if that's all you can affford.
Good idea to leave off prices since those are subject to change.

NB4VW

· #18 · Sep 20, 2008

Why do people call it a vnt15 if it's a garret vnt1759?

NJ2dc

· #19 · Nov 17, 2008

So who has tried some of these turbos? How reliable are aftermarket turbos.

grizzly

· #20 · Nov 18, 2008

They should be reliable but sometimes they prove to not be. The problem is inconsistency during assembly. Aftermarket turbos can't guarantee how much power they make either since it varies by setup. But even worse, some of the turbos aren't mass tested so think of the manufacturer's quote as an estimate.

As long as the manufacturer warranties it, you should be good but remember that they will never warranty installation costs or down time. There were some complaints against street toys of poor welds and turbos that leaked and blew up. I don't know how they turned out, check out the thread on tdiclub and you can see the complaints. Garrett only sells 1 VNT 17 upgrade so all the bolt-on turbos from other sellers are all hybrids. You could get other stock turbos to fit but they all need some minor mods to fit.

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