GM ECU 1227730/47: basic questions

[John Zarli]

Shannen Durphey wrote:
> 
> I've been watching this thread closely.  Just a word of warning, the grind of the cam
> is as important as the duration.  I went with 215deg at .050" on my crossfire
> conversion and now I can watch the ecm throw extra fuel pulses out everytime the
> vacuum gauge drops fast at idle.  I have put two older intakes on newer heads and I
> just elongated the center holes then cut out tapered washers on a band saw.  Worked
> fine and looked ok too.
> Shannen
Shannen, have you tried a NEWER manifold on an older bolt pattern head?
  Also, can you clarify the your statement about watching the ECM pulse
extra fuel?  How did the engine misbehave?...Also note that 215^ is up
yet another notch from from the 208 of the ZZ3 cam, which by all catalog
indications is pushing the limit for stock FI.