starter relay, next gen modification Options

[Tom]

Well, been meaning to get this done for a while. Didn't want the hot start kit from Bosche or the Ford relay, so I found one on line that I liked.
Installed the relay on a small bracket on one of the mounting screws for the relay board. Ran a new small yellow wire to pin 6 of the 12 pin connector and a brown ground wire to the bracket . Ran two 12 ga. wires fron the relay to the solenoid with the hot wire having an inline water resistant ATC fuse holder with a 30 amp fuse. Put some heat shrink around the normally used large yellow wire to protect it. On the solenoid side used tape to protect the connector that used to be hooked to the solenoid.
This relay uses 140 mili-amp so not a very large inductive spike to worry about, but I installed a supression diode across the relay coil anyway. Also put a larger one across the solenoid coil at the relay ( 87 to ground). This supresses the solenoid coil inductive spike to protect the relay contacts.
here are a few pics, and a link to more info: http://www.google.com/url?sa=t&rct=j&a...eg_6KDxZdKYQYGw This is the aeroelectric link
Oh, I tested it several times and it works just fine.
Tom
Edit: changed back EMF to inductive spike, sorry if this confused anyone. Inductive or transient spike is the correct term for what is happening here

[Tom]

Jim,
With the key off, the coil has no power and if it is fuel injected, neither does the ECU, so no it should not start. All you are doing is the same as putting a screwdriver across the hot wire on the solenoid to the solenoid power connector, Ie. engaging the starter only. About the same as a remote start switch that mechanics use to turn the engine over without starting the engine, kind of like when setting the points or valves. Releasing the button will stop the "bump" feature. There are other ways to do this and the same safety measures need to be observed. This is a good way to "save" the electronic ignition mods from having to have the key switch on, which has a detremintal effect on the electronic ignitions.
Valy,
No one can engineer out all of the mistakes a home mechanic can do to himself, which is one of the reasons I am not doing kits for this mod. I only did one extra kit for someone I felt had the expertise and understanding to use it safely. But your reasoning is very good and understood. Besides that, the only thing that could happen if the car is in gear, is the car will move forward or backward. To push the button, you would need to be on the driver's side reaching into the engine bay and not in the path of the car.
To all, there is an addition I have made to the schematic to ensure there is no power feedback to any other circuits. It is adding a diode between the normal start circuit and the push switch. This ensures no power goes from the push switch to pin #6 of the 12 pin connector on the relay board. If anyone is interested in doing this to their car, let me know and I will post an updated schematic.
Thanks,
Tom