Do 2.1 alternators fit 2.0 Aircooled CU engines?

Post by **toolsntat** » 08 Jun 2017, 11:57

I believe that they should have the higher amp fitted but cannot get at it to see yet.
Same shape across the models I guess?
Cheers
Andy

Post by **bigherb** » 08 Jun 2017, 12:29

If you mean 2.1 DJ WBX then no the front housing is different. CU standard was 45A, 65A optional.

Post by **toolsntat** » 08 Jun 2017, 14:19

bigherb wrote:If you mean 2.1 DJ WBX then no the front housing is different. CU standard was 45A, 65A optional.

Thanks for that.
So I need to look for a CU specific model then.
Non listed on Brickwerks?
The 2.1 is an injection but by the sound of it that will not fit anyway.
Cheers
Andy

Post by **bigherb** » 08 Jun 2017, 15:52

toolsntat wrote: Thanks for that.
So I need to look for a CU specific model then.

Andy

Yes it only fits the CU or CT engines.
Whats wrong with the old one?

Post by **toolsntat** » 09 Jun 2017, 11:23

Been told the old one is not giving right voltage and I would like to increase amps.

Andy

Post by **bigherb** » 09 Jun 2017, 12:03

Output voltage is controlled by the regulator, fit a 14.2V or 14.4V regulator for best performance with modern batteries. Unless you have a lot of extra accessories switched on when running the engine then the 45A is quite capable and also able to charge a leisure battery.
65A alternators are available, anything bigger will tend to overload the drive belt.

Post by **Oldiebut goodie** » 09 Jun 2017, 13:18

^^^ and not forgetting that you are sapping more horsepower with a more powerful alternator.

Post by **toolsntat** » 09 Jun 2017, 18:37

Good on the both of you for your replies.
I'll look into getting the 14.4 regulator.

Cheers
Andy

Post by **spherehopper** » 09 Jun 2017, 19:26

Oldiebut goodie wrote:^^^ and not forgetting that you are sapping more horsepower with a more powerful alternator.

Even if you were drawing max power 65A instead of 45A, that's 20 amps at 12v. Say the alternator was only 65% efficient at converting engine power into electricity, then that's equivalent to 370 watts, about half a horsepower. Air conditioning on the other hand (not that T3s have it) saps 10 times that amount (via a belt driven pump of it's own rather than the alternator though).

With a lesser load on the alternator (ie batteries charged, lights off etc), then the load on the engine would reduce.

My gf has a wheezy old Mercedes A class. You have to turn the air con off to get up hills! Or rather you did before it broke.

Club 80-90 Forums

Do 2.1 alternators fit 2.0 Aircooled CU engines?

Do 2.1 alternators fit 2.0 Aircooled CU engines?

Re: Do 2.1 alternators fit 2.0 Aircooled CU engines?

Re: Do 2.1 alternators fit 2.0 Aircooled CU engines?

Re: Do 2.1 alternators fit 2.0 Aircooled CU engines?

Re: Do 2.1 alternators fit 2.0 Aircooled CU engines?

Re: Do 2.1 alternators fit 2.0 Aircooled CU engines?

Re: Do 2.1 alternators fit 2.0 Aircooled CU engines?

Re: Do 2.1 alternators fit 2.0 Aircooled CU engines?

Re: Do 2.1 alternators fit 2.0 Aircooled CU engines?