[Gmecm] turbocharger on a speed density system?

[Bill Shaw]

Hi Michael,  welcome to the list.

You could probably get away with adding a boost retard box and a rising rate
fuel pressure regulator as many have done before,  or change the ECU to a GM
1227749 from a Syclone/Typhoon.  The '749 knows all about boost and handles
the spark & fuel properly under boost conditions. That's the route I took
for my blown 928,  and it's worked pretty well these past few years.

http://p-928.home.comcast.net/749.html

Tons more info in the archives,  and a '749 specific page on GMECM.

Bill
'84 928s 5 sp. Vortech/749
'80 308i
'84 Mondial Cab.
'94 Z28 LT1/A4


From: "Michael Steinman" <ru1469 at hotmail.com>

Hello all! I am new to the list, but have already gotten a ton of help from
you all just reading the archives. now I am hoping for more of the same
help. I am interested in installing a turbocharger setup on my 383 SBC. It
is already extensively modified: alm. vortech heads, GMPP intake manifold,
compucam roller camshaft, Hooker supercomp headers and a custom built
exhaust system. I have modified the existing ECM to use the Romulator 2 so I
have full controll over the FI system. I am not sure however if the ECU will
respond well to boost pressure where it expects vacuum. I have heared of
using 2 or 3 bar MAP sensors and whatnot, but as of yet have not gotten any
straight usefull answers. any help that anyone could lend would be greatly
appreciated.


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