The Better question might be when do you need the extra power? To make this info easy to understand I will break this way down into something that hopefully everyone can grab onto....... The engine is a air pump......The more air you can move the more power the given engine can make provided it is tuned properly. Adding turbos to a engine allows the engine to move more air. The less restriction and turbulence on the intake or exhaust on a turbo application will allow the turbo to move more air easier and more efficiently and thus will make more power. The stock Tee for the single pop is extremely restrictive because both sides are pulling from the same place in the center of the Tee.....Because they are pulling from the center of the Tee they are pulling from each other and causing a fairly large intake restriction. Separating the two sides into a dual pop allows the turbo to pull air much more freely and the turbo moves more air and makes more power. Yes, A stock turbo car greatly benefits from a dual pop! We have done dyno tests before and after on several stock turbo cars and the gain is about 20 RWHP on average at full power with race fuel. I like to do tests on cars that already make great power because if they can produce higher numbers when they are already high, it adds more to the results of the tests. Below is a dyno chart of Mike Homer's car (TT.NET Member WXY) Mikes car runs mid 11's in the 1/4 mile and has a completely stock engine that has never been apart with stock turbos. Mike's car had all of are 2.5" exhaust products on the car with stock exhaust manifolds and Greddy inter coolers in both tests. The test below shows just changing from single intake to JWT dual pop at full power. This set up made about 20 PSI on 104 octane fuel.
Follow Ups
Dual Pops and 3 inch When do I need them? post#1 - Greg D. (Specialty-Z)15:14:42 07/26/07
Dual Pops and 3 inch When do I need them? post#1 - 
