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Originally Posted by theaudir8fan
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Originally Posted by Myaddiction
There are no upgrades anywhere for these direct injectors, however fueling isn't a problem since S63tu M5 are making over 820rwhp with meth.
The only problem with fueling is if you don't want to run meth. That's true on any BMW turbo motor. The N54 has aftermarket port injection setups but that's not coming to our motor any time soon if ever.
If you don't run meth on these motors your limited to less then 600 rwhp. That's the choices you have.
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That's the key, I'm for one not at all willing to run meth injection. I have seen too many cases of blown motors where the meth fails for just a second while the ECU targets too much advanced timing due to the tune being mapped for pump + meth. As I see it the only real way to show improvement is if the tunes are both based on 91 pump gas. After all you can add meth to a car with stock turbos and set more advanced timing to make more power |
That's fine and your choice. I'm not selling meth kits and would prefer to stay away from one if possible but it's not possible on the S63 if you want to go beyond a tune and downpipes.
You simply won't make good power on 91 California gas. The blend is not knock resist at all and acts like 89 found else where in the country. It's focused on smog reduction first. You can't break 500rwhp on it in these motors let alone reach the systems fuel volume limits which are much higher if you have the octane to support the boost.
I add E85 to my tank making a E30 blend and you can see the difference right away as timing climbs up without the knock 91 produces even on a stock tune.