kameleon
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Lightweight alternators....
I need to move the alternator on my 3SGTE to make room for other items so i am taking the opportunity to replace it with something lighter (i hope!)
I have power steering so have the larger alternator (p/s is staying)
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WIDEMR
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Re: Lightweight alternators....
2013/04/06 12:09:36
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I would love to know also, ill see what i can find out, but all alternators would be heavy, without going down from the 100A to an 80 or 60 ect, not sure you would find one much lighter?
Theres not a lot of un necessary weight on the factory one i guess, its aluminium body, cant take alot of weight off the rotor, windings ect i guess.
There are lighter ones out there tho, good ones like Bosch Motorsport ones but very $$
Obviously the factory bracket is way to heavy tho, so i have a light weight aluminium one, i assume you will be making a new bracket tho.
You can get a light weight pulley, i was going to get one made by Ross when they make me a balancer, if your interested let me know.
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Mrskylighter
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Re: Lightweight alternators....
2013/04/06 13:43:04
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Just an fyi, Racerx in the US is currently having a sale and has reduced the price of the lightweight alt bracket he makes. I think its $159.95 USD plus postage.
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Dudeman
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Re: Lightweight alternators....
2013/04/06 15:00:23
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Slight thread deviation...
Are there alternators for 3s that put out more than 100a?
I'm looking at put a group of largish spots on the front of my turbo.
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kameleon
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Re: Lightweight alternators....
2013/04/07 00:42:59
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Yeah Brendan there is not many options considering what the item is/does. I did find this site interesting as it lists weights of some different alternators:- http://www.brise.co.uk/alternators.html Racer x bracket is fine for most, but i can make something cheaper (plus i no longer will be mounting it there) Dudeman, i think you will have better luck changing the power lead to a larger item than going to a 120A or higher alternator. Power leads in japanese cars are tiny in comparison to their European brothers and therefore can do with a upgrade. Does anyone have a stock 100Amp alternator lying around they can weigh for comparison?
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just_ace
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Re: Lightweight alternators....
2013/04/07 02:03:55
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kameleon
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Re: Lightweight alternators....
2013/04/07 11:04:22
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I wonder how much it weighs
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-Totenkopf-
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Re: Lightweight alternators....
2013/04/07 11:37:13
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You dry sumping that sucker Trav?
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WIDEMR
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Re: Lightweight alternators....
2013/04/07 12:56:18
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Or vac pump?
I tried to weigh mine travis, but my only accurate scale goes up to 5kg, its over that, other scales i wont be able to tell if its 5 or 15kg.
Due to not only higher RPM on my motor but also will be higher RPM much more often i will be running a slightly over sized pulley.
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-Totenkopf-
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Re: Lightweight alternators....
2013/04/07 13:25:38
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I think you were saying something about power steer delete brendan? I don't see why you couldn't get away with 60-70a alternator without power steer, particularly if it is a track car.
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Reddtarga
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Re: Lightweight alternators....
2013/04/07 14:02:14
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The 80 amp alternator with stock pulley from my 90 model NA weighs just under 5 kg.
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kameleon
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Re: Lightweight alternators....
2013/04/07 14:37:39
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Not dry sump no (that would be nice though), vac pump is going on. I have more ancillaries on the engine than anyone else has ever had i think :(
If you're not running power steering you could definitely run something as small as James said. Especially if you are using some good dry cell batteries as well.
Being a street car i want it all and it costs you in weight thats for sure! this car still has a/c too (thats a whole other thread that one)
If even the non power steer car has a 5kg alternator then there are a few kg gone in alternator itself using aftermarket the same capacity, or even more if i dropped to a 90A for instance. But also the alternator bracket being thrown in the bin too.
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WIDEMR
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Re: Lightweight alternators....
2013/04/07 14:55:37
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Yeah biggest saving will be the bracket for sure. I will be running a smaller alternator then the 100 yes. From factory, can the 80 and 100 be swapped? or do they have different thickness mounting? Ian are you able to measure the thickness of the bottom mounting tab/bolt location? The 100A i have is 58mm. Suppose smaller output will be same or smaller if anything, can always shim it out with some washers. BTW the same manufacturer/design/technology alternator ect on the same car, the 100A wont have any more load on the motor then the 80A Another trick is to turn off the alternator (cut the ign wire to it) to stop the load on the motor when required (during short runs or TPS over 95% ect) and gain a few KW's, but thats a different topic. Ill be keeping the alt in the factory location, no vac or dry sump pump, dry sump would be nice but alot of weight, more connections and parts mean more things to fail ect, ill test the car, if i dont need it i dont need it. Only spot to relocate is AC location i guess, but much hotter and higher COG.
post edited by WIDEMR - 2013/04/07 15:10:20
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just_ace
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Re: Lightweight alternators....
2013/04/07 15:10:48
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Hmm ill see if the various celica alts I have a dfferent amps. If so ill weigh them.
I think ill start a thread is on vac pumps. I was just looking at them this week but no idea on the gains are to be had.
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WIDEMR
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Re: Lightweight alternators....
2013/04/07 15:20:33
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What sizes did SW20s come with? was 80 the smallest or was there a 70 or 60?
Having a look, theres a few models that have the same mountings, thread size, pulley size ect, some just have diff plug, no big deal, so can easy get 60 and 70A, wounder how much they weigh
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