35is, Aftermarket Turbos
- Thread starter jleckenby
- Start date
Tumnus said:
Excuse the stab at whp to bhp conversions, just using rough figures!
Injectors are fine until 760bhp (650whp) according to this article: http://www.bimmerboost.com/content.php?7375-VPG-tops-650-whp-on-the-N54-using-the-direct-fuel-injection-system-and-no-supplemental-injection
Other N54 cars will see 600bhp on the stock fuel system. The fuel system on the Z4 is more robust than other N54 cars so I'm not sure how much further you can push it.
See this article for power numbers on 93octane fuel with upgraded turbos, all power figures are quoted in wheel horsepower: http://www.bimmerboost.com/content.php?7423-VTT-N54-GC-cast-stock-location-turbos-93-octane-pump-gas-dyno-results
I'd say 500bhp is easy.
Fuel pump on the Z4 has more headroom than other models.
A lot of people use ethanol blends which have a lower calorific value so the fuel system has to work harder. If he runs normal 93 octane fuel then I think 500bhp will be easy.
This was an old post I remember but they got to 600bhp with 91octane: http://www.e90post.com/forums/showthread.php?t=829687
The LPFP was upgraded but the Z4 LPFP has a much better flow rate than others.
You're right about an intercooler though. Should be the next mod.
A lot of people use ethanol blends which have a lower calorific value so the fuel system has to work harder. If he runs normal 93 octane fuel then I think 500bhp will be easy.
This was an old post I remember but they got to 600bhp with 91octane: http://www.e90post.com/forums/showthread.php?t=829687
The LPFP was upgraded but the Z4 LPFP has a much better flow rate than others.
You're right about an intercooler though. Should be the next mod.
