carb to TBI converions, Marine application

[keaton]

I'm look on here and I don't see the park switch
http://www.gearhead-efi.com/Fuel-Inj...4&d=1322083598

[dave w]

I'm not sure what exactly happens when the manual transmission option is selected. I've converted a few 1227747's to the '8625; I selected manual transmission because they were using either a TH400 or a 700R4 with the factory VSS. I then disabled all the 4L60E / 4L80E transmission codes.

The '8625 needs a VSS input of 2000 (2K) pulses per mile. Here is a link to some VSS options: http://www.jagsthatrun.com/Pages/Spe...eedometer.html Other options include using the speedometer driven VSS from behind the dash of an early 1227747 vehicle (which is a 2K VSS). Maybe connect an electric motor or variable speed electric motor to an aftermarket VSS? The basic idea I have is to provide the '8625 with a VSS speed, so it will switch between Near Idle and Off Idle. Typically the '8625 will switch from near idle to off idle at 6 MPH with 2.1% or greater TPS. The '8625 could be well worth the VSS hassle to use in a Marine application? Imagine having near idle fuel and spark tables for "Wake Free" zones and docking maneuvers along with off idle fuel and spark tables for getting on and staying on the "Plane"!

If your plans are for open loop only, go with the 1227747, I'll gladly swap you two '7747's for the one '8625.

dave w