Making the case for the FrankenTurbo
(EPL tuned Frankenturbo F4H)
Background:
After driving my S4 with an EPL tuned 605 kit for almost 6 months I decided the less responsive low end pull, as compared to the K04 setup I’d had previously, and what I felt was a significant performance drop in higher temperatures, were reasons to consider other options.
FrankenTurbo (FT) was just introducing the F4H-BT for the 2.7T motor and was looking for some beta testers. With aspirations to spool like K03’s and top end like the RS6 turbo the FT appeared to be aiming at just the performance characteristics I was looking for. Always interested in testing a new product, and desiring to get back to a quick spooling turbo, I made the decision to remove the 605’s for the untested F4H’s.
Response to this decision was often bewilderment:
•“are u joking? from a solid turbo setup to china turbos... oh boy go see a doctor” – AMC
•“Wow, one step forward, two steps back” – PearlS4
•“Is this real life?” – DiscoPotato
•“went through the whole annoying process of swapping turbos, for a couple hundred rpm better spool and less power? I join the rest of folks who are confused. Why all the work just for that? Seems a piece of the puzzle is missing.” – Raacerx
•“Smaller turbo will only generate more heat and deliver less GRAMS of air to the engine due to gas expansion. Even dunbar will not argue that his FTs are better than 605s, completely different league.” – julex
•“pulling out a perfectly good 605 to try out the FTs well that takes some balls I guess. If all he wants is low end torque then I suppose its a good choice. But this bussiness of hot weather affecting the 605s more is a bunch of bunk. sounds like a tuning issue, not a turbo issues. k04s will make more heat at the same levels of boost, no ifs ands or buts about it.” – S4James
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•“ft push no where near as much air as 605's” – spokismB5S4
