Page 1 of 1
4.6 Starter Motor
Posted: Sun Oct 14, 2012 4:27 pm
by 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
Posted: Sun Oct 14, 2012 5:48 pm
by ChrisJC
Some do, some don't........ Not sure why.
Chris.
Re: 4.6 Starter Motor
Posted: Sun Oct 14, 2012 5:53 pm
by DaveEFI
john 215 wrote: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.
Posted: Sun Oct 14, 2012 6:31 pm
by 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
Posted: Sun Oct 14, 2012 8:50 pm
by 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??
Posted: Sun Oct 14, 2012 10:11 pm
by DaveEFI
john 215 wrote: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.
Posted: Mon Oct 15, 2012 5:54 am
by 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
Posted: Mon Oct 15, 2012 6:31 am
by 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
Posted: Mon Oct 15, 2012 7:05 am
by 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
Posted: Mon Oct 15, 2012 8:29 am
by DaveEFI
DEVONMAN wrote: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