Well I got a reply from Todd Day and the limit I'm talking about is a limit set up in the ECU against airflow (not air mass). Since it's a limit against airflow Todd figures it was put in there to prevent us from hitting MAF overrun. When pre-fuel cut is hit the ECU closes the boost control solenoid thus trying to shut down your boost levels. I guess it has no effect on timing or knock sum just the BCS. So if you remove the BCS from the system then it'll get rid of this problem because the ECU will no longer have any control over boost. You'd then be free to hit MAF overrun and fuel cut

So the answer to my original question was 1) a limit in the ECU. Funny how my MAF mods theory post to the digest early this year is proving to be more and more accurate

This is only for 1Gs. Apparently this effect does not exist for 2G guys.

I'll let you all know once I've updated the page... it'll be a very interesting read

Later....

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Mike J

-Quadcylla-
92 Laser RS-T, FWD

Vortex Racing
http://www3.sympatico.ca/robin.jackson2/HomePage.htm