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Old 11-17-2011, 01:48 PM
bricas45's Avatar
bricas45 bricas45 is offline
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Location: Virginia
Join Date: Jan 2009
Posts: 1,041
Mein Auto: 335i, 540i6, X5
I believe I will go with the 42lb injectors as I do not plan on going with the Dinan tune. I have someone local and with the headers and running 8psi of boost I think the 30lb injectors would be on the low side.

I just ran some calculations and I know someone doing a similar setup got 440whp (517bhp). If I run ~50psi at fuel rail to get that power I would need the 42lb. The 30lb injectors can only support 380bhp where the 42lb can support 500bhp.

Not sure how incredibly accurate that is as I am running ~355bhp now on 19lb stock injectors!
2013 - X5 35D
2009 - 335i coupe FBO
2001 - SC 540i
1986 - 318i Turbo

Last edited by bricas45; 11-17-2011 at 01:51 PM.
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