911 Cooling Shrouds - Improving Internal Air Distribution

[Sandeep]

The shroud with the mods to the back of the 911 fan is working great. The hottest temp I have to date is 361F on #4 at 17 psi, 5400 rpm in 4th.

The car runs awesome with the turbo with temps averaging around 320F while driving around town. On the highway they average about 340F with all cylinders within about 10F of each other.

The Megasquirt EFI really helps as well, as does the LC-1 because I can dial in exactly the A/F ratio I want. The EDIS helps as well because of the programmable ignition.

I really did not know what A/F ratio I was running with the 44IDF's and not exactly sure of the timing with the 050 Dizzy, because the temps I am getting with the EFI/EDIS/Turbo are close to what I had with the 44 IDF's/050 Dizzy/No turbo.

So overall, I am extremely happy because I KNOW I have a 911 shroud that cools well enough for me to run a turbo at 17 PSI

Engine is currently apart to fix a loose valve seat and is getting an overall refresh. Will be terrorizing the streets again in spring 2007

Sandeep

sandeep