The Best twin turbo set up?

[Rabbit on Roids]

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.

[Dirtrag2]

ok so the first turbo gets an external wastegate but the big one is ok as a stock t3 ( internal wg ) right?

[Rabbit on Roids]

yea, it would be fine as long as the drive pressure never gets too high.

[smokin_fun]

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.

[Dirtrag2]

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

[smokin_fun]

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

[Dirtrag2]

just rooting thru the net and found this... prety cool

http://www.worldcarfans.com/104041410781/-opel-twin-turbo-revolutionizes-diesel-engine-technology

[expanty09]

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.

[Rabbit on Roids]

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...

[smokin_fun]

besides the only japanese car worth working on is a Previa!

[zukgod1]

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..