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Originally Posted by 1911A145
When we change out the turbo(s) on these cars, isnt it required that a custom tune be done to make this mod work safely?
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Yes correct but you can still run the same tune as before on the RB turbos and run less taper up top.
The RB are built with a new compressor wheel, a new turbine wheel and shaft and are pretty much oem look keep the same water and oil lines im pretty sure.
They hold boost much more efficently have upgraded wastegates and can really be efficent over the stock turbos reguardless what boost your running. Im pretty sure a good mad would be running 19psi to about 5500rpms and tapering to about 15-16 psi of boost and i should get an easy 450 wheel probably more mated with methanol. So we will see!!!