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Murt Samba Member

Joined: October 01, 2017 Posts: 534 Location: Kent, England
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Posted: Sun Jul 06, 2025 3:53 am Post subject: Re: Pertronix 90amp alternator |
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I’m also doing a refresh on my spare Bus engine, and decided to switch to the Alternator, as I have added lots of ancillaries now. I have also opted for the 90A version. Out of the box it looks OK, and can’t detect any bearing problems. I bought this as it claims ‘proudly made in the UK’ so hopefully it is a good one.
_________________ 1966 VW Beetle ‘Jules’
1967 Kombi Splitscreen ‘Barney’
2018 VW Caddy Maxi R Line
2017 Golf GTD saloon
2008 VW EOS 2.0 TFSi |
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BFB Samba Member

Joined: November 03, 2014 Posts: 2627
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Posted: Sun Jul 06, 2025 8:33 am Post subject: Re: Pertronix 90amp alternator |
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DesertSasquatchXploration wrote: |
I did a new generator with my top end refresh guess what it had 1/4 of end play. Did I return it NO Pulled the end caps it was missing the shim/spacers so used the lathe and made some. This is what we have now you just need to play the game finish the job and get it done. Instead of bitching expand your knowledge and ability. |
Most people, myself included, believe that if you spend money on a new part that you shouldnt have to work on it or machine parts to make it work as it was supposed to. Theres a reason parts have warranties, and manufacturers defects are covered.
Your statement about your junk generator is the equivalent of going out for a steak dinner at a nice restaurant, expecting to get what you pay for , but instead they bring you a plate of uncooked food. So you go buy a grill , bring it to the restaurant and cook your own meal, eat it, pay full price, then ridicule the other patrons for complaining about the product they received.
Thats just ignorant _________________ "how am i supposed to torque the rear wheel nut to 250 ft lbs??? " - clonebug
An interesting thing happens in forums where everyone starts parroting the same thing and "common knowledge" takes over.
Most experts aren't. |
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tattooed_pariah Samba Member

Joined: April 24, 2006 Posts: 2063 Location: El Cajon, CA
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Posted: Sun Jul 06, 2025 8:45 am Post subject: Re: Pertronix 90amp alternator |
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DesertSasquatchXploration wrote: |
I did a new generator with my top end refresh guess what it had 1/4 of end play. Did I return it NO Pulled the end caps it was missing the shim/spacers so used the lathe and made some. This is what we have now you just need to play the game finish the job and get it done. Instead of bitching expand your knowledge and ability. |
that's great advice for people without enough space for a true shop or owning equipment like a lathe..
get over yourself. yes, aftermarket parts are not as good as they used to be, but trying to make yourself feel better than everyone else because you have tools most people don't isn't helpful either..
"oh, you paid for something that was delivered in non-operable status? well that's your fault for not knowing how to manufacturer it yourself and rebuilding it using consumer level industry tools..." lol, piss off. _________________ -pariah
'72 Volksrod |
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tattooed_pariah Samba Member

Joined: April 24, 2006 Posts: 2063 Location: El Cajon, CA
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Posted: Sun Jul 06, 2025 9:36 am Post subject: Re: Pertronix 90amp alternator |
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BFB wrote: |
DesertSasquatchXploration wrote: |
I did a new generator with my top end refresh guess what it had 1/4 of end play. Did I return it NO Pulled the end caps it was missing the shim/spacers so used the lathe and made some. This is what we have now you just need to play the game finish the job and get it done. Instead of bitching expand your knowledge and ability. |
Most people, myself included, believe that if you spend money on a new part that you shouldnt have to work on it or machine parts to make it work as it was supposed to. Theres a reason parts have warranties, and manufacturers defects are covered.
Your statement about your junk generator is the equivalent of going out for a steak dinner at a nice restaurant, expecting to get what you pay for , but instead they bring you a plate of uncooked food. So you go buy a grill , bring it to the restaurant and cook your own meal, eat it, pay full price, then ridicule the other patrons for complaining about the product they received.
Thats just ignorant |
lol, i posted my response and was waiting to get yelled at.. I'm glad I'm not the only one who interpreted his post that way.. _________________ -pariah
'72 Volksrod |
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Rob Combs Samba Member
Joined: December 30, 2020 Posts: 486 Location: South Bay LA, California
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Posted: Sun Jul 06, 2025 9:45 am Post subject: Re: Pertronix 90amp alternator |
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Different people have different situations they live with. For some, the return process and turnaround time costs more in time and resources than just fixing the issue ourselves. Setting aside the very real possibility of getting another defect and starting the cycle all over again.
Just looking to the thread with the dude who got bent (brand new) heater boxes for a recent prime example of what I mean.
If a $15 fix and not much time spent = problem solved and not having to deal with it again, I’ll be the one to give fixing it myself some serious consideration, regardless of how the world should work…
Just a different perspective I suppose. Not ignorance or stupidity, just measuring the constraints one faces and making a rational choice. |
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Glenn  Mr. 010

Joined: December 25, 2001 Posts: 79430 Location: Sneaking up behind you
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Posted: Sun Jul 06, 2025 10:37 am Post subject: Re: Pertronix 90amp alternator |
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Just proves the adage:
Good parts are not cheap and cheap parts are not good. _________________ Glenn
74 Beetle Specs | 74 Beetle Restoration | 2180cc Engine
"You may not get what you pay for, but you always pay for what you get"
Member #1009
#BlueSquare
עַם יִשְׂרָאֵל חַי |
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DesertSasquatchXploration Samba Member

Joined: April 16, 2021 Posts: 963
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Posted: Sun Jul 06, 2025 10:38 am Post subject: Re: Pertronix 90amp alternator |
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Tiny men playing victims. Good luck in the upcoming years you will need it. Parts are assembled by kids who cant tie a shoe lace. Good bearings are 15 each FAG and Timken have never done me wrong. Grow up your never to old to learn. I'm not your your enemy you are. _________________ Key is to have downward travel Preload keep both wheels on the ground at all times once you lift a tire your DONE. Guys worry about clearance instead think of the opposite you want the suspension to drop that tire in the hole and keep you going. A spider for example they keep their body low but their legs can reach pretty far so they don't (bottom out) |
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sidemarkers Samba Member

Joined: January 26, 2014 Posts: 105 Location: AZ
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Posted: Sun Jul 06, 2025 12:14 pm Post subject: Re: Pertronix 90amp alternator |
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Glenn wrote: |
Just proves the adage:
Good parts are not cheap and cheap parts are not good. |
Is a $250 alternator considered cheap these days? |
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Glenn  Mr. 010

Joined: December 25, 2001 Posts: 79430 Location: Sneaking up behind you
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Posted: Sun Jul 06, 2025 12:22 pm Post subject: Re: Pertronix 90amp alternator |
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sidemarkers wrote: |
Glenn wrote: |
Just proves the adage:
Good parts are not cheap and cheap parts are not good. |
Is a $250 alternator considered cheap these days? |
I sold a Bosch rebuilt AL78X for $425.
That's not what I asked, it's what the buyer offered. _________________ Glenn
74 Beetle Specs | 74 Beetle Restoration | 2180cc Engine
"You may not get what you pay for, but you always pay for what you get"
Member #1009
#BlueSquare
עַם יִשְׂרָאֵל חַי |
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sidemarkers Samba Member

Joined: January 26, 2014 Posts: 105 Location: AZ
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Posted: Sun Jul 06, 2025 1:05 pm Post subject: Re: Pertronix 90amp alternator |
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Since the 90's I've been relying on the Autozone lifetime warranty when my alternator fails.
Didn't realize the current state of alternators is so Bougie. |
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BFB Samba Member

Joined: November 03, 2014 Posts: 2627
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Posted: Sun Jul 06, 2025 3:09 pm Post subject: Re: Pertronix 90amp alternator |
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Theres a big difference between ‘fixing’ an inferior part , and ‘fixing’ an inferior part then ridiculing others who for whatever reason decide not to do so.
I had a cheap eBay 90 amp alternator come to me with the keyway cut offset. I filed the key down so it fit the pulley and away we went. That situation was not worth returning it and there was no warranty expected. But again, it stupid to ridicule others for doing the same thing.
And dont for a minute think that because someone has the equipment to ‘fix’ the part that separates them into another category that justifies things. Ive known several well off people who could probably buy the whole manufacturing plant a faulty part was made in yet they buy cheap parts and dont pass up on saving a $2 item because they might need it later, and they will damn sure return a faulty part.
I spend an average of $20k on parts in a month, theres very few times i will spend the time & labor to repair a part, it’s not cost effective. Not to mention if you did have a warranty on a mechanical part, then you just voided it by modifying it.
As far as the whole ‘shit hitting the fan, so you better learn skills and prepare to re-line your brake shoes’ type shit, thats just ignorant too and shows how fearful you are. People have been preaching ’doom & gloom’ for decades. Could it happen? Sure. Anything wrong with having some skills and food & such set back? Absolutely not. But to live your life in fear of it, dwell on it, and preach & condemn those who dont is sad and pathetic. _________________ "how am i supposed to torque the rear wheel nut to 250 ft lbs??? " - clonebug
An interesting thing happens in forums where everyone starts parroting the same thing and "common knowledge" takes over.
Most experts aren't. |
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sidemarkers Samba Member

Joined: January 26, 2014 Posts: 105 Location: AZ
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Posted: Sun Jul 06, 2025 3:56 pm Post subject: Re: Pertronix 90amp alternator |
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Fedex says the new alt will be here tomorrow!
Perhaps it's about time I expand my knowledge and ability on my obviously cookie cutter engine. |
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Rob Combs Samba Member
Joined: December 30, 2020 Posts: 486 Location: South Bay LA, California
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Posted: Sun Jul 06, 2025 4:19 pm Post subject: Re: Pertronix 90amp alternator |
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Twin turbos on a type 3? Awesome!
And in all sincerity I do hope your replacement alternator gives you no more grief. Changing the alternator on any of these is one of the shittiest jobs one can do under the lid. |
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sidemarkers Samba Member

Joined: January 26, 2014 Posts: 105 Location: AZ
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Posted: Sun Jul 06, 2025 4:43 pm Post subject: Re: Pertronix 90amp alternator |
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Rob Combs wrote: |
Twin turbos on a type 3? Awesome!
And in all sincerity I do hope your replacement alternator gives you no more grief. Changing the alternator on any of these is one of the shittiest jobs one can do under the lid. |
Turbos? What, where?
Type 1 cooling tin, huh? What?
No that suitcase isn't covering anything, just going on little vacay.
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Rob Combs Samba Member
Joined: December 30, 2020 Posts: 486 Location: South Bay LA, California
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Posted: Sun Jul 06, 2025 5:00 pm Post subject: Re: Pertronix 90amp alternator |
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Brilliant! |
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girlscoutcookies Samba Member
Joined: July 20, 2014 Posts: 45 Location: Murrieta, CA
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Posted: Sun Jul 06, 2025 7:57 pm Post subject: Re: Pertronix 90amp alternator |
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Sh*t also happened to my brand new AL82N, Indian made Bosch. Past 5k it starts to make junk noises. Swapped the big bearing in front + small bearing in rear with original SKF products immediately. No issues! |
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modok Samba Member

Joined: October 30, 2009 Posts: 27656 Location: Colorado Springs
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Posted: Sun Jul 06, 2025 10:01 pm Post subject: Re: Pertronix 90amp alternator |
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Far as I know, right now it would be better to get one of those "rebuilt in mexico" alternators from the local FLAPS, than a pertronix or new chinese one.
10-20 years ago was different, I remember rebuilding several rebuilt starters and so forth, but......
After a few decades of practice they started getting good at it.
Practice makes perfect
At least, until they all retire or run out of broken alternators.
But at the moment, imagine, just imagine how many old alternators they have in mexico.
Mounds of them, pyramids of alternator hell.
And in another 5 or 10 years they will all be gone forever, melted down. |
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oprn Samba Member

Joined: November 13, 2016 Posts: 14713 Location: Western Canada
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Posted: Mon Jul 07, 2025 6:00 am Post subject: Re: Pertronix 90amp alternator |
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Just wondering how you are getting away with recycling hot air into the type 1 cooling fan. It must get smoking hot in that engine compartment especially with twin turbos and all the related piping. What am I missing here? _________________ Our cars get old, we get old but driving an old VW never gets old! |
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sidemarkers Samba Member

Joined: January 26, 2014 Posts: 105 Location: AZ
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Posted: Mon Jul 07, 2025 11:38 am Post subject: Re: Pertronix 90amp alternator |
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oprn wrote: |
Just wondering how you are getting away with recycling hot air into the type 1 cooling fan. It must get smoking hot in that engine compartment especially with twin turbos and all the related piping. What am I missing here? |
There isn't really a short answer for it. Placement is important.
I use the frontal high pressure area for a RX-7 oil cooler and removed the doghouse cooler from the engine bay.
Twin intercoolers with fans pulling air from the rear fender louvers, most of the time the fans aren't on. Charge pipes are dense foam insulated.
Turbo blankets, header wrap on downpipes.
Gauges for the vitals. Oil, intake air temp, cylinder temp etc.
Air filters outside engine bay.
Mid 9's compression, .040 quench.
The intake air temp is usually about 15 degrees above ambient and that's taken BEFORE the water injection nozzles placed in the endcastings.
Under boost the water injection lowers the intake charge further and the cylinder head temps drop from 300ish to about 270. Highest oil temps I've seen with the front mount are less than 200. |
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jpaull Samba Member

Joined: February 22, 2005 Posts: 3640 Location: Paradise, Ca
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Posted: Mon Jul 07, 2025 12:16 pm Post subject: Re: Pertronix 90amp alternator |
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sidemarkers wrote: |
oprn wrote: |
Just wondering how you are getting away with recycling hot air into the type 1 cooling fan. It must get smoking hot in that engine compartment especially with twin turbos and all the related piping. What am I missing here? |
There isn't really a short answer for it. Placement is important.
I use the frontal high pressure area for a RX-7 oil cooler and removed the doghouse cooler from the engine bay.
Twin intercoolers with fans pulling air from the rear fender louvers, most of the time the fans aren't on. Charge pipes are dense foam insulated.
Turbo blankets, header wrap on downpipes.
Gauges for the vitals. Oil, intake air temp, cylinder temp etc.
Air filters outside engine bay.
Mid 9's compression, .040 quench.
The intake air temp is usually about 15 degrees above ambient and that's taken BEFORE the water injection nozzles placed in the endcastings.
Under boost the water injection lowers the intake charge further and the cylinder head temps drop from 300ish to about 270. Highest oil temps I've seen with the front mount are less than 200. |
Nice work! That is no easy task. Lots of thinking outside the box and creative! _________________ [email protected] MPH 1/4 Mile & 8.1 @ 83.7MPH in 1/8 Mile with Mild Type 1 VW Mag Case 2234cc commuter engine in stock weight bug w/only .491 total lift(CB2292 Cam), 42x37 heads, 48idf's, Street tires, Belt on, Mufflers, Pump gas, video of the run here: https://youtu.be/M3SPqMOKAOg
Transmission by MCMScott:
Rhino case, Klinkenberg 4.12, Superdiff, 002 mainshaft with 091 first idler. Weddle 1.48 Third & 1.14 Fourth. |
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