94_Teggy

I have a 94 integra gsr...iam in the process of turboing it.my goal with the car is to have about 300whp and it to be a daily driver..now iam lookng at buying a turbo and came across a garrett twin scroll .57 trim..

What is your opinon on this?also whats does twin sroll mean...i did some research but came up with nothing

94_Teggy

from what iam reading is that a twin scroll is a low a/r at low-end and a high a/r at top end....and the twin scroll should be used on diesel engines or bigger the 4 cylinders?

TheShodan

iTrader: (14)

check sig. You must mean a divided housing only.

94_Teggy

iam saying twin scroll since the person selling has it listed as tiwn scroll...theres nothing but a saying in ur sig...no help!

JDMguy88

copied from another forum:
The twin scroll is just a more advanced tubine housing design that helps to enhance exhaust gass energy utilization while minimizing ehxaust manifold backpressure and hence potential for reversion.

Think of your average inline 4 cylinder. Ever notice how in 4-2-1 headers they always pair cylinder 1 with 4 and cylinder 2 with 3 when merging the 4 pipes into the 2 secondaries? The basic firing order dictates that pairing these cylinders together will give the longest possible gap between exhaust pulses traveling through the pipes, thus enhancing flow while minimizing reversion. The twin scroll operates with the same basic principle in mind: keep the cylinders firing into an exhaust pipe that isn't already stuffed full of exhaust from an adjacent cylinder. With turbo cars this can be especially important as at higher RPM exhaust backpressure is usually significantly higher than atmospheric pressure, and often higher than intake manifold pressure as well.
So the twin scroll creates two exhaust paths instead of one, allowing for that increased separation in exhaust flow that is key to keeping everything from stacking up behind the turbo and causing reversion. It also helps to preserve the exhaust velocity of each pulse by offering a smaller overall volume to hold each one, so the turbine impeller is more easily spun up by a given total amount of flow than an equivalent single scroll design. Or at least that's the theory behind them.

You can also check this link for more info on different types of turbos:
http://www.honeywell.com/sites/ts/tt/

TheShodan

iTrader: (14)

^^ There's the help.. k? a divided housing is a necessity to be a twin scroll design, not a sufficiency to be one.

Schister66

^^^I knew you'd see "Twin Scroll" and give someone hell about it

94_Teggy

ok now that i no wat it is..would you consider this good for a daily driver and 300hp?

sweetfwdthunder

iTrader: (2)

If you're only shooting for 300whp on a dd, then just get a regular turbo..it will be cheaper for you in terms of the manifold, turbo, and wastegate (since you'll only need one). There's no need to make things more complicated than they need to be for a low power level.

94_Teggy

ok thats all i need to know...so ill just a get a regular turbo