[Diy_efi] Making a fake O2
espresso_doppio at yahoo.com
Thu Jun 9 01:28:50 CDT 2005
--- Marc Reviel <marc at powerlogix.com> wrote:
> FYI, I am just finishing a prototype of a twin turbo
> upgrade for the Porsche Boxster. The test mule is a
> 1999 model, 2.5L, 11:1, no variable cam timing,
> and last year before they went to e-throttle. I
> designed it for low-boost/earliest spool up -
> 2000rpm = 2.5psi, 2400 = 5psi. During part-
> throttle/mild acceleration, it is almost always
> running positive boost, and does remain in closed-
It's commanding lambda 1 under boost without problems?
Is it radically retarding ignition timing to
accomodate that AFR?
> I have about 1200 miles heavy testing on it.
> So far, no issues at all (not even a CEL). No
> piggyback stuff, stock ECU programming.
I guess it doesn't surprise me *too* terribly much
that the stock sensors can handle a bit of boost. I
gather there is an airbox-mounted intake pressure
sensor, or a MAF sensor (or possibly both)?
| 82 Honda CX500 Turbo (Cassandra) 90 Kwak Zephyr 550 (Daphne) |
| "It was like an emergency ward after a great catastrophe; it |
| didn't matter what race or class the victims belonged to. |
| They were all given the same miracle drug, which was coffee. |
| The catastrophe in this case, of course, was that the sun |
| had come up again." -Kurt Vonnegut |
| M/C Fuel Inj. Hndbk. @ Amazon.com - http://tinyurl.com/6o3ze |
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