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05g356mtt 05g356mtt is offline
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Posts: 30
Join Date: Jun 2019
Car: Red Sport 400
Default 07-03-2019, 09:24 AM

Quote:
Originally Posted by RandyNester
Can you give a suggestion as to where boost should top out?
Here's Stillen's recommendation long read but very informative

TO INFINITI BEYOND - ANALYZING THE VR30DDTT TURBOS | STILLEN Garage

Tuning:

While there is still a lot of exploring to do when it comes to tuning, there are several things we can see just by looking at the turbo map and dyno sheets. Your biggest gains will all be in the mid-range (2500-5000 RPM) with the stock turbos.

Based on the turbo map, tuning to 18 PSI from 4000-5000 RPM puts you in a very ideal efficiency range for the turbos. Now dropping the boost after 5000 RPM is important as holding too much boost is not ideal for the motor or turbos, but also won’t gain much additional power. This fine tuning of boost pressure adjustment is made easier by the factory electronically controlled wastegate actuators.

That being said, I believe the JB4's that have dipped into 11's are running more than +5, some as high as +7 in mid range but tapering off aggressively


2019 Q50 RS AWD
BMS JB4 + FW/HEX
MR LDP's
12.19 @ 115.87 on 93 (Map 6)
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