View Single Post
911nut 911nut is offline
Metal Guru
911nut's Avatar
Join Date: May 2001
Location: Michigan
Posts: 2,511
Originally Posted by 911st View Post
I suspect it would be good to take the belt off the injection pump and set or verify the AFR's. Then reinstall.
I am also interested in the air pump reducing lag.
The Bentley manual says to disconnect the inlet hose on the air diverter valve before making adjustments.

On the 964 Turbo air is injected into the exhaust ports during warm-up only, then is diverted to the cat.
Even if one was to continuously inject air into the exhaust ports during running operation, the air on it's own would not energize the exhaust flow. Fuel would need to be added since the turbine is powered by rapidly expanding gas.
Paul B.
'91 964 Turbo
Port matched, SC cams, K27/K29 turbo, Roush Performance custom headers w/Tial MV-S dual wastegates, Rarlyl8 muffler, LWFW, GT2 clutch & PP, BL wur, factory RS shifter, RS mounts, FVD timing mod, Big Reds, - 210 lb
Old 01-02-2010, 07:30 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #5 (permalink)