View Single Post
T77911S T77911S is offline
Registered User
T77911S's Avatar
Join Date: Oct 2006
Location: MYR S.C.
Posts: 10,838
no you did it wrong I think.

ANY given engine with ANY fuel management requires a certain amount of fuel at WOT.

I started with the EFI injector flow requirement as a starting point, then realized fuel pressure (for EFI) has a real effect on injector SIZE.
so I looked at the BSFC site. this is a calculation of how much fuel is needed for a given lambda and HP. (from what I gather).
using the .65 from the EFI site (for turbo engines) I came up with around 500cc for 450hp, the same I came up with on the EFI site.

also from the EFI site I came up with flow that SHOULD be about what Porsche was looking for with a stock 930. (using 100% duty cycle)

brains numbers look to be right for 1400cc/30 sec.
I still think even at 450hp that may be under rating your engine.
86 930 42kmiles [__] RUNNING:[__] NOT RUNNING: ____77 911S widebody: SOLD
88 BMW 325is 200K+ SOLD
05 BMW 330CI 130K:: [__] RUNNING: [__] NOT RUNNING:
08 VOLVO V70 190K:: [__] RUNNING: [__] NOT RUNNING:
Old 11-02-2017, 11:49 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #52 (permalink)