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#15
by
Rabbit on Roids
on 06 Dec, 2009 11:30
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crap... you beat me to it, thats what i was going to say too,. but at high speeds you need a big enough wastegate that when it opens it basically cuts the high pressure turbo out of the equasion pretty much, lots less restriction from it.
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#16
by
Dirtrag2
on 06 Dec, 2009 11:40
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ok so the first turbo gets an external wastegate but the big one is ok as a stock t3 ( internal wg ) right?
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#17
by
Rabbit on Roids
on 06 Dec, 2009 11:41
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yea, it would be fine as long as the drive pressure never gets too high.
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#18
by
smokin_fun
on 07 Dec, 2009 09:11
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try and find a copy of "Turbochargers" by HPBOOKS , this book is awesome! it has a section on how to calculate flows for compound setups, all the way to 200 psi manifold pressure!
I picked up a copy for 7 bucks at a used book store in langford..... best 7 dollars i ever spent!
The author of this book really stresses proper matching of turbos to motors, especially in compound setups.
Definitely a good read.
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#19
by
Dirtrag2
on 07 Dec, 2009 19:17
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try and find a copy of "Turbochargers" by HPBOOKS , this book is awesome! it has a section on how to calculate flows for compound setups, all the way to 200 psi manifold pressure!
I picked up a copy for 7 bucks at a used book store in langford..... best 7 dollars i ever spent!
The author of this book really stresses proper matching of turbos to motors, especially in compound setups.
Definitely a good read.
cool
could you do me a favor and post the ISBN # for that book so i can order one? you will find it above the bar code usually
thanks
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#20
by
smokin_fun
on 08 Dec, 2009 01:03
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the isbn is 0-89586-135-6. author is hugh macinnes.
this website talks about this very book (its the one pictured on the left) plus has tons of great info and turbo maps:
http://www.rbracing-rsr.com/turbotech.html The chapter in "Turbochargers" on tractor pulling has some crazy stuff about three stage turbo chargers with water/meth injection. Each stages pressure ratio is 2.7, so 2.7x2.7x2.7x14.7=289.34 psia or 274psig!!! Boost increases exponentially!
2 stages , having a pressure ratio of 2.36 each, would result in a manifold pressure of 67 psig,[(14.7x2.36x2.36)-14.7)] and an astronomical egt without proper inter/after cooling. (these are rough calculations, not accounting for various innefficencys, mechanical or otherwise.)
I'd love to see a three stage turbo setup on a Vw diesel.... I wonder how long one would last at 275 psi boost.. maybe if it redlined at 10,000
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#21
by
Dirtrag2
on 08 Dec, 2009 17:08
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#22
by
expanty09
on 08 Dec, 2009 18:43
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Anything is possible with money, of course. Me personally, if I were to do a twin turbo setup, I would use two small T25 or smaller same turbos on a 4 cylinder Accord.
Now, that would be unique.
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#23
by
Rabbit on Roids
on 10 Dec, 2009 08:53
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but, were on a VW forum here, not some retarded honda forum. saying Accord or Civic, is just about the same as saying F*** on here...
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#24
by
smokin_fun
on 10 Dec, 2009 11:42
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besides the only japanese car worth working on is a Previa!
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#25
by
zukgod1
on 10 Dec, 2009 14:50
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is just about the same as saying F*** on here...
BAM!!!!!!Rabbit, I completely forgot to buzz ya on my trip up there. Crap!! Next time..