Understanding a turbo map

With Turbo and Super charging you can create massive horsepower with vw motors.

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MarioVelotta
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Understanding a turbo map

Post by MarioVelotta » Fri Dec 17, 2010 12:40 am

Hey chaps,

stumbled on this great thread surfing last night and would like to share! Great info to get you going.

http://www.vauxhallsportforum.com/phpBB ... s-t92.html
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Hotrodvw
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Re: Understanding a turbo map

Post by Hotrodvw » Fri Dec 17, 2010 10:32 am

Thanks Mario!
Last edited by Hotrodvw on Sun Dec 26, 2010 11:05 am, edited 2 times in total.
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seabeebuggy
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Re: Understanding a turbo map

Post by seabeebuggy » Sun Dec 26, 2010 8:16 am

Thanks Mario :D

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Re: Understanding a turbo map

Post by my_medusa » Mon Dec 27, 2010 1:25 pm

really interesting would be how to read the turbine maps that are for the garrett gt series. is there any info to find the right turbin side?

wishes

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Re: Understanding a turbo map

Post by MarioVelotta » Mon Dec 27, 2010 5:17 pm

It's the same principle as a compressor map each has a flow rating.
GT2860RS_739548_1_turbo_e.jpg
If you look at this with an .86 ar your turbine isn't going to be choked off at 21 or so lb/min of exhaust flow. Or the .64 at 17 lb/min.

I'm not sure just exactly how to figure the exhaust flow yet. I do know my pressures though so I'm close I think.
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Mario@thedubshop.net
2276 Turbo - 92 Octane
11.537 @ 115.74mph - 15psi
1600 S.C. - ?sec @ 10psi (so far) 8)
1600 NA ITB - 18sec :lol:
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my_medusa
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Re: Understanding a turbo map

Post by my_medusa » Tue Dec 28, 2010 5:54 am

but thats my question how to use this numbers of flow?

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MarioVelotta
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Re: Understanding a turbo map

Post by MarioVelotta » Tue Dec 28, 2010 11:19 pm

If someone wants to give an excel spreadsheet a go you can plug these equations in :)

http://www.dragracemath.jimhatleyracing ... eflow.html
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Mario@thedubshop.net
2276 Turbo - 92 Octane
11.537 @ 115.74mph - 15psi
1600 S.C. - ?sec @ 10psi (so far) 8)
1600 NA ITB - 18sec :lol:
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Re: Understanding a turbo map

Post by miniman82 » Tue Dec 28, 2010 11:41 pm

MarioVelotta wrote:I'm not sure just exactly how to figure the exhaust flow yet.


Garrett has turbine flow maps as well, you just don't see them published because people are way too preoccupied with compressor flow. Give them a call, I'm sure you can convince them you need map x y and z since you 'are a faithful buyer of their products, and recommend them highly to all your customers', hint hint. :lol:
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Re: Understanding a turbo map

Post by panel » Thu Dec 30, 2010 11:35 am

How do you plot a graph like this? I've done a little plotting for mine but how do you get the line from the first point to the second point.This is not my turbo it's just for reference. Mine points seem to not be smooth(if I can remember) or I'm just guessing at the PSI through-out the RPM.

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Re: Understanding a turbo map

Post by MarioVelotta » Sun Jan 02, 2011 9:06 pm

I come up with something like this
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2276 Turbo - 92 Octane
11.537 @ 115.74mph - 15psi
1600 S.C. - ?sec @ 10psi (so far) 8)
1600 NA ITB - 18sec :lol:
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Stripped66
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Re: Understanding a turbo map

Post by Stripped66 » Fri Jan 14, 2011 8:27 pm

Here's a fun calculator to play with:

http://www.squirrelpf.com/turbocalc/

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Re: Understanding a turbo map

Post by MarioVelotta » Fri Jan 14, 2011 9:32 pm

If you hop on the forum and ask real
nice he will add maps for you :) He's added a couple
for me.
The Dub Shop
Mario@thedubshop.net
2276 Turbo - 92 Octane
11.537 @ 115.74mph - 15psi
1600 S.C. - ?sec @ 10psi (so far) 8)
1600 NA ITB - 18sec :lol:
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miniman82
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Re: Understanding a turbo map

Post by miniman82 » Sat Jan 15, 2011 12:54 am

Which begs the question: what will YOU do if I ask real nice? :shock:


Answer truthfully, we're Facebook friends.

:lol:
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my_medusa
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Re: Understanding a turbo map

Post by my_medusa » Mon Jan 17, 2011 8:07 am

i found sometihing about turbin calculations...but over edges.
at first the link to the really really wide open calculator.
thanks borgwarner!!!
but it is more really usefull for the big turbo guys!
http://www.turbodriven.com/performancet ... index.html

to the turbin calculations:
at the end it calculate you a curve like squirrel but also the curve for the turbin...
so everybody could let calculate his exhaust curve. the only thing is i do not see in what the y-axle is..it is not kg/sec.
i belive it should be lb per second????right? i give it a try and checked some compareable exhaust housing from the garrett gt series and i it workes with lb/sec to lb/min.

for finding the right turbin housing and the right A/R it could be usefull.

the whole calculater can be used like squirrel but more interesting data and more possible input. i checked it with my dream engine and it put out the same hp, pressure ratio+++ range and curve for a compressor map like squirrel and now also turbin curve.
i really like it!

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Re: Understanding a turbo map

Post by Humpty » Wed Apr 13, 2011 9:34 pm

MarioVelotta wrote:I come up with something like this
That GT2560R map is handy.... That's the exact same turbo I have on the POS currently.... With the little mouse motor attempting to make it spool.... I reckon the 2276 should wake it up a little.... Nice to know I don't have to rebuild the whole box'n'dice for the new longblock!

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