GT3082R Advice Wanted
Thread Starter
Registered User
Joined: Oct 2006
Posts: 1,456
Likes: 0
From: ontario
GT3082R Advice Wanted
Has anyone had experience with a 3082r that has a divided t3 exhaust (twinscroll) design?
here is reference to what i am talking about ATP Turbo, just look through the options and you'll see it
I'm interested to know what this would be like with Pfab's top mount equal length manifold? It should spool fairly quick, and also give a great midrange and decent top end.
thanks
here is reference to what i am talking about ATP Turbo, just look through the options and you'll see it
I'm interested to know what this would be like with Pfab's top mount equal length manifold? It should spool fairly quick, and also give a great midrange and decent top end.
thanks
Thread Starter
Registered User
Joined: Oct 2006
Posts: 1,456
Likes: 0
From: ontario
Originally Posted by devs2k,Oct 20 2008, 12:45 PM
you would need a twin scroll manifold as well; it would have to be custom-made
pfab has made a few
pfab has made a few
Joined: Apr 2006
Posts: 7,852
Likes: 0
From: Clifton, NJ
I want to do a twinscroll set up as well; from my research, I can tell you it will spool faster and make slightly more power than a traditional tubular manifold. I'm talking full boost at less than 4000 rpm.
Registered User
Joined: Apr 2008
Posts: 227
Likes: 0
From: AZ
Originally Posted by devs2k,Oct 20 2008, 09:55 AM
I can tell you it will spool faster and make slightly more power than a traditional tubular manifold. I'm talking full boost at less than 4000 rpm.
Trending Topics
Joined: Apr 2006
Posts: 7,852
Likes: 0
From: Clifton, NJ
Originally Posted by OKSTWOK,Oct 20 2008, 02:00 PM
Why's that?
the full info (from Garrett's site) is as follows:
The concept is to DIVIDE or separate the cylinders whose cycles interfere with one another to best utilize the engine's exhaust pulse energy.
For example, on a four-cylinder engine with firing order 1-3-4-2, cylinder #1 is ending its expansion stroke and opening its exhaust valve while cylinder #2 still has its exhaust valve open (cylinder #2 is in its overlap period). In an undivided exhaust manifold, this pressure pulse from cylinder #1's exhaust blowdown event is much more likely to contaminate cylinder #2 with high pressure exhaust gas. Not only does this hurt cylinder #2's ability to breathe properly, but this pulse energy would have been better utilized in the turbine.
The proper grouping for this engine is to keep complementary cylinders grouped together-- #1 and #4 are complementary; as are cylinders #2 and #3.
Because of the better utilization of the exhaust pulse energy, the turbine's performance is improved and boost increases more quickly.
For example, on a four-cylinder engine with firing order 1-3-4-2, cylinder #1 is ending its expansion stroke and opening its exhaust valve while cylinder #2 still has its exhaust valve open (cylinder #2 is in its overlap period). In an undivided exhaust manifold, this pressure pulse from cylinder #1's exhaust blowdown event is much more likely to contaminate cylinder #2 with high pressure exhaust gas. Not only does this hurt cylinder #2's ability to breathe properly, but this pulse energy would have been better utilized in the turbine.
The proper grouping for this engine is to keep complementary cylinders grouped together-- #1 and #4 are complementary; as are cylinders #2 and #3.
Because of the better utilization of the exhaust pulse energy, the turbine's performance is improved and boost increases more quickly.
Joined: Apr 2006
Posts: 7,852
Likes: 0
From: Clifton, NJ
true twin scroll manifolds have dual external wastegates... however, those i've spoken to who have made the manifold (pfab) and those who have made and used it personally (AFI turbo for their time attack s2000) claim a single external wastegate like a Tial 44 is enough.. why not two? lack of space
Registered User
Joined: Apr 2008
Posts: 227
Likes: 0
From: AZ
Originally Posted by devs2k,Oct 20 2008, 10:30 AM
true twin scroll manifolds have dual external wastegates... however, those i've spoken to who have made the manifold (pfab) and those who have made and used it personally (AFI turbo for their time attack s2000) claim a single external wastegate like a Tial 44 is enough.. why not two? lack of space