Twin Turbo M5

[AnthonyF]

i've seen those kits at the Sema show, isnt that turbo lag out the ass???

[speedminded]

i've seen those kits at the Sema show, isnt that turbo lag out the ass???

Frequently Asked Questions http://www.ststurbo.com/f_a_q

Q: With the turbo so far back, don't you get a lot of turbo lag?
A: No, our turbochargers are sized to operate at this remote location. Just like any turbocharger, once the turbo is up to temperature and in the rpm range for which it was designed to operate. The boost comes on hard and fast. All of our systems will produce full boost below 3000 rpm.
If you were to take a conventional turbo and place it at the rear, you would have lots of lag and consequently, our turbo wouldn't work properly if mounted up front.


Q: With so long of intake and exhaust tubes, doesn't it take a while for the boost to build up?
A: No, our intake tubing volume is about the same as most conventional turbo setups that are running a front mounted intercooler, and less than many of them that run large intercoolers. We aren't talking about a small compressor filling up a large air tank, we are talking about a huge compressor filling up a very small volume which only takes a fraction of a second. Our systems compress the intake tubing in about .05 seconds. So much for turbo lag...


Q: Isn't there a huge pressure drop with such long intake tubes?
A: No, if the pipes were 100' long there would be but we are only talking a few extra feet and we size the charge air tubing so that it will flow without a large pressure drop. We typically will get about 1/4 to 3/4 lb difference between the turbo compressor and the intake manifold, which is nothing compared to the pressure drop across an intercooler. With high boost applications, these numbers will increase slightly.