remote turbo hot pipe size?
Thread Starter
Staging Lane
Joined: Dec 2005
Posts: 75
Likes: 0
From: NYC
Trending Topics
Thread Starter
Staging Lane
Joined: Dec 2005
Posts: 75
Likes: 0
From: NYC
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?
Pouria Savadkouei
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
the reason I went 2.5" over 3" was to reduce overall surface area for heat retention. Heat is what is the most important. Volume of the pipe, velocity and pressure are minor compared to heat retention. 2.5" pipe has 15% less surface area than 3" pipe.
How large the exhaust pipe is doesn't really matter as long as you can keep the heat in.
How large the exhaust pipe is doesn't really matter as long as you can keep the heat in.
GTO manifolds=2" i.d. outlet, Zombie please comment Since a couple of questions are similar, I was wondering since the manifold outlet is 2" i.d. wouldn't 2.25" pipe from both sides into a single 2.5 be sufficient to the turbo? As you have preached to many, heat retention is key so, the outlet is 2" and my theory is going bigger than 2.25 from each manifold to the y just wastes the heat energy through more surface area. Yes? No? These manifolds support 400 hp from the factory with that small exit opening. Thanks for any input.
Since a couple of questions are similar, I was wondering since the manifold outlet is 2" i.d. wouldn't 2.25" pipe from both sides into a single 2.5 be sufficient to the turbo? As you have preached to many, heat retention is key so, the outlet is 2" and my theory is going bigger than 2.25 from each manifold to the y just wastes the heat energy through more surface area. Yes? No? These manifolds support 400 hp from the factory with that small exit opening. Thanks for any input.
It was fun to experiment, but it certainly wasn't cheap (well it was sorta cheap because I have a good fabricator who likes to experiment too). My car has had around 10 different configurations.
my application is much different, but the heat properties are the same. I used a 2.5" pipe for the Y-pipe, then a Flowmaster y into 3 inch, all the way to the turbo. The whole hot side is wrapped in DEI header wrap, then used their black silicone coating on it. My engine displaces 6.5L but only spins to 3400 rpm. I have no problem hitting 18 psi under WOT. The turbo is rear mounted, and had a front mount intercooler. Cold side charge pipe is 2.5" all the way. There is about 16 feet of cold piping.
I agree with Zombie. If I had to do it again I would prob go with 2.5" all the way to the turbo. But I am not sure if my EGT's would be ok. I am sure with a gas engine and the right turbo, the 2.5" setup would be great. hope this helps. car is in sig.
Cody
I agree with Zombie. If I had to do it again I would prob go with 2.5" all the way to the turbo. But I am not sure if my EGT's would be ok. I am sure with a gas engine and the right turbo, the 2.5" setup would be great. hope this helps. car is in sig.
Cody
