Topic: alternator rating (Read 2768 times)

mark.yellow.series.3 · « **on:** March 10, 2007, 12:12:31 »

what size would an alternator be on a RRC 1980 ish.

Range Rover Blues · « **Reply #1 on:** March 10, 2007, 14:08:11 »

Standard 63/65 amps, export spec 80 amp.

mark.yellow.series.3 · « **Reply #2 on:** March 10, 2007, 17:18:04 »

hmmm....

might be worth getting a bigger one.

what kind of prices are the 80amp jobbies??

dave362 · « **Reply #3 on:** March 10, 2007, 17:50:49 »

Quote from: "mark.yellow.series.3"

hmmm....

might be worth getting a bigger one.

what kind of prices are the 80amp jobbies??

As I have a winch I uprated my 1987 65amp to 100 amp for Ã‚Â£110

hairyasswelder · « **Reply #4 on:** March 11, 2007, 00:59:24 »

Quote from: "dave362"

Quote from: "mark.yellow.series.3"
hmmm....

might be worth getting a bigger one.

what kind of prices are the 80amp jobbies??

As I have a winch I uprated my 1987 65amp to 100 amp for Ã‚Â£110

Was advised wiring may need uprating for 100a. Have you uprated or do you have any problems?

Steve

Range Rover Blues · « **Reply #5 on:** March 11, 2007, 02:16:20 »

Uprating the wiring is relatively easy, wire the winch to the alternator

Seriously though, it's only the wiring that will carry more than was originally intended, so the alternator to battery wire and that's where the winch will connect.

80 amp, onlyu problem is finding one, I tried looking for a spare to no avail.

The problem I forese is the Vee belt, mine can eat a new belt in an afternoon with just the fans cutting in all the time (laning in the peaks) so I use a 13mm wide belt rather than the 10mm belt it should have. I suspect that a 100amp alternator would only make matters worse, so I toyed with the idea of fitting the 100 amp unit from a '93 SE as it has a multi vee belt from the crank pulley, over a giude on the PAS pulley then direct to the alternator.

However I think now I'll be going for a serpentine front end on the 4.6 this summer when it goes in.

mark.yellow.series.3 · « **Reply #6 on:** March 11, 2007, 19:02:00 »

the other idea iam toying with is on the front crank pulley on the V8, there is a small v which the alternator and water pump currently use, and there a much bigger v , which i could use for the bigger alternator on another belt.

Range Rover Blues · « **Reply #7 on:** March 12, 2007, 00:59:46 »

You have an SD1 engine IIRC. The RRC V8 in the EFi has no spare Vee in the pulley.

mark.yellow.series.3 · « **Reply #8 on:** March 12, 2007, 19:28:06 »

Quote from: "Range Rover Blues"

You have an SD1 engine IIRC. The RRC V8 in the EFi has no spare Vee in the pulley.

defo a RRC engine, confirmed when i bought a new water pump.
although padocks crossed the engine number to an SD1, but rimmer bros told me it was a RRC due to the engine number and water pump type.

my V8 is the one with 'pulse air' system on it, and SU's.

Range Rover Blues · « **Reply #9 on:** March 12, 2007, 19:36:23 »

I thought you'd said it was SD1 at somepoint. Anyhoo, it's a pre-EFi engine, so still different to my EFi lumps

mark.yellow.series.3 · « **Reply #10 on:** March 13, 2007, 20:55:47 »

Quote from: "Range Rover Blues"

I thought you'd said it was SD1 at somepoint. Anyhoo, it's a pre-EFi engine, so still different to my EFi lumps

the only thing i have ever had to buy where it would matter if it was an SD1 or RR enigne, was the water pump, and two companies told me different stories, altho i tend to belive rimmer bros as the guy discribed the engine differences over the phone. :D

so the PAS or aircon dosent run off the extra V in the pulley then?

Difflock · « **Reply #11 on:** March 13, 2007, 21:28:36 »

Ive heard the alternator off a ford scorpio/granada will fit,now if you get one off an all singing all dancin one (fully loaded) then I think they are good for 100 amps and there are plenty of said cars in scrappys these days

P.S the poly vee belt sytems (wide belt with loads of ickle V's in) can take alot more stick than your standard single vee type,the problem ive found in the past with single vee belts is the "V" angle on the pulleys wear's down and polishes up to [!Expletive Deleted!] so your belt contact area disappears to nowt and starts the dreaded squeal and no matter how tight you get it,it will still squeal it's t*ts off

Range Rover Blues · « **Reply #12 on:** March 13, 2007, 23:36:06 »

You're right it's the multu vee or serpentine belt as it's also kknown that you want for a 100 amps alternator.

Or if you can find one the '93 model SE had a different crank pulley with the 2 Vee belts and a multi vee also, the alternator drive ran over a guide pulley on the PAS pump to the alternator direct.

MArk, on the EFi engine, theere are normally 2 Vee on the front pulley, the back one drives the PAS which in turn drives a second belt for the alternator (cack or what?), the front pulley drives the water pump which in turn drives yet another belt for the air conn if fitted, so that's 4 belts in all :shock:

On the '93 you still have 4 belts but one is a very long multi vee.

On the fully serpentine engine you have 1 wider multu vee that does everything, quietly. The water pump and fan run backwards though :!:

mark.yellow.series.3 · « **Reply #13 on:** March 14, 2007, 18:08:36 »

hmmmm, serpenine

now theres a thought
:D :D :D

Range Rover Blues · « **Reply #14 on:** March 15, 2007, 14:06:18 »

Different oil pump too

mark.yellow.series.3 · « **Reply #15 on:** March 16, 2007, 19:25:37 »

i was thinking of a eletric oil pump to improve the oil flow 8)

all tho it has about 30psi with hot oil, 15/40

Range Rover Blues · « **Reply #16 on:** March 17, 2007, 01:47:38 »

Too much pressure is as bad as not enough

mark.yellow.series.3 · « **Reply #17 on:** March 18, 2007, 19:36:59 »

the oil pressure valve should open when the pressure gets to high, i think mine opens at 65psi.
but too much oil flow is a different problem

Range Rover Blues · « **Reply #18 on:** March 19, 2007, 02:11:09 »

Yes absolutely. Too much pressure can cause cavitation amongst other things.

Too much oil is more an economy issue, unless there is so much running through the engine that none is left in the sump.

dave362 · « **Reply #19 on:** March 19, 2007, 19:29:59 »

Quote from: "hairyasswelder"

Quote from: "dave362"
Quote from: "mark.yellow.series.3"
hmmm....

might be worth getting a bigger one.

what kind of prices are the 80amp jobbies??

As I have a winch I uprated my 1987 65amp to 100 amp for Ã‚Â£110

Was advised wiring may need uprating for 100a. Have you uprated or do you have any problems?

Steve

I did not uprate the wiring and so far so good, but as I am about to convert to a 300tdi, I might just upgrade the wiring while I am at it. I did have to change the pulley wheel to take the original profile of belt to it and tbh it does squeel sometimes. The only alternator that was available at short notice was for the left handside, so it has been fitted where the aircon pump once was.

mark.yellow.series.3 · « **Reply #20 on:** March 19, 2007, 19:30:00 »

whats cavitation?

Range Rover Blues · « **Reply #21 on:** March 21, 2007, 21:45:35 »

When oil/fluid goe through a gap so fast it starts to pull the walls apart.

From your basic Bernoulli'e equation, speed, pressure, height are interchangeable, as a large volume gets forced through a small space the pressure drops and can cause a vacuum, damaging things like bearing surfaces.

mark.yellow.series.3 · « **Reply #22 on:** March 21, 2007, 23:32:09 »

a day without learning is a day wasted :D

Range Rover Blues · « **Reply #23 on:** March 22, 2007, 02:11:45 »

I like that :D

Difflock · « **Reply #24 on:** March 22, 2007, 21:22:29 »

Cavitation,What dentist dreams are made of :D :D

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AuthorTopic: alternator rating (Read 2768 times)