Quote:
Originally Posted by NHRABill
Don't think that there would be many that would argue that a turbo is the most eficient of the 3 types of forced induction. But a good ? is what turbo setup is most efficient?
I have always found the tailpipe turbo STS style is the best route for effiencey and installation  No need for a intercooler when it is where the muffler is located. It keeps engine temps down and cools the charge in the longer travel distance back to the intake. I know someone with this setup but he is tuned for power not mpg |
This is just my opinion but those STS rear mounted turbo I can't see how it can be efficient . they sure are good for installation and keeping heat down in engine bay but there are drawbacks from my point of view.
1) there long length from turbo to throttle-body induces lag as that whole length of pipe needs filling .
2) on the exhaust side having turbo back there is losing the heat and velocity of exhaust right out of head .
3) The oiling system is much more complicated as you need a pump to return oil back to sump and you are below pan level which means if pump goes bad oil back up into turbo center housing .
These comments are from working in performance industry, installing turbo kits and turbo/inter cooler upgrades. Some of the front mounted intercooler kits I can notice a lose of response and here were talking just few ft increase .
Now most of the cars they install in are big V8 so they probably don't hamper much but if it was small L4 or V6 IMO it would be noticeable.
Just look at OEM they don't mount turbo far away, its always to keep piping short as possible .