I don't get it, what makes higher rpm a requirement to build boost? The only thing I can think of is the fact that with more exhaust (due to higher rpm) the exhaust manifold pressure rises and therefore provides more forceful expulsion of exhaust through the turbo, helping spool it up. What other things (apart from the compressor map) can dictate where the threshold is and why that happens?
- PearlLv 71 month ago
i would ask a mechanic to help you out with it