4.6 Starter Motor

[john 215]

Hi,

I thinking about fitting a Range Rover P38 starter motor to my 4.6 that i have in my TR7, at the moment it has a tired SD1 starter motor in it.

My question is, i have two connectors on the solenoid on the SD1 motor, one to switch the solenoid the other to by pass the ballast wire for starting.

Does the Range Rover have two wires on it

If not, any suggestion how to get round this

Cheers John

[ChrisJC]

Some do, some don't........ Not sure why.

Chris.

[DaveEFI]

Hi,

I thinking about fitting a Range Rover P38 starter motor to my 4.6 that i have in my TR7, at the moment it has a tired SD1 starter motor in it.

My question is, i have two connectors on the solenoid on the SD1 motor, one to switch the solenoid the other to by pass the ballast wire for starting.

Does the Range Rover have two wires on it

If not, any suggestion how to get round this

Cheers John

Which SDI ignition system? Didn't think any V8 had a ballast resistor. The P6 did, though.

[john 215]

Hi,

Thanks for the reply's, the engine is in a TR7,which runs a ballast wire system. I am running a Mallory ignition on mine, twin point with a electronic pick up conversion.

Be intresting to know why some run a extra terminal and some dont

Cheers John

[mgrv8]

could you run a wire through a diode from the starter relay to the positive side of the coil? so when starter is switched on to crank the wire would become live to byepass the ballast direct to the coil... but once running the diode would stop current going back to the starter ?if you know what i meen??

[DaveEFI]

Hi,

Thanks for the reply's, the engine is in a TR7,which runs a ballast wire system. I am running a Mallory ignition on mine, twin point with a electronic pick up conversion.

Be intresting to know why some run a extra terminal and some dont

Cheers John

The solenoid probably isn't specific to any one model, so the extra contacts are there for those that need it. Same as a rev counter output on some alternators - only needed with diesels.

[DEVONMAN]

Just in case you don't realise, the solenoid on the Range Rover starter is positioned at the side and the SD! type is underneath, So,. make sure you have sufficient clearance in the TR7 at the steering, chassis, exhaust etc.

Cheers Denis

[john 215]

Hi Denis,

Yeah looked at that and the column would be the only poss thing in the way but the RR motor are a little smaller i think so should be ok, i hope !

I too thought about a diode, any idea where i could get one and what would be suitable ?

Cheers John

[DEVONMAN]

You could use a standard relay instead of a diode.

Connect the relay to the starter terminal on the ign switch so that the relay switches on when starter is running and then put 12v through the relay contacts to the coil +ve terminal.

Most motor factor shops have standard relays for a few quid.

Chers Denis

[DaveEFI]

You could use a standard relay instead of a diode.

Connect the relay to the starter terminal on the ign switch so that the relay switches on when starter is running and then put 12v through the relay contacts to the coil +ve terminal.

Most motor factor shops have standard relays for a few quid.

Chers Denis

If you already have a starter relay and it's just a SPST, change it for a twin output type.



Vehicles Wiring Products part number is R20BD