rupes21 stall too much

I have a 21 and never used it with out the washer mod .
the mad scientist who invented the washer mod is a real American
A tough guy an explorer a inovator and inventor. He is like Christopher Columbus , niel Armstrong why would you not do the Kevin brown mod..
 
mbkite said:
I have a 21 and never used it with out the washer mod .
the mad scientist who invented the washer mod is a real American
A tough guy an explorer a inovator and inventor. He is like Christopher Columbus , niel Armstrong why would you not do the Kevin brown mod..
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Same reason as Christopher Columbus and Neal Armstrong, they both used their equipment as provided figuring the engineers that designed it made it that way for a reason. My question is, "Why would you alter a brand new expensive piece of equipment?"
 
Never has my Rupes 15 or 21 stalled. It has slowed but quickly recover once I change pressure or position of the polisher. That is all you have to do, there is no learning curve. To me, a rotary or Flex 3401 has a small learning curve, but not the Rupes.
 
BeachZone said:
I agree with Rasky on this one. I hated the 21 when I first purchased it but after I spent the time learning this tool, I love it.

Rasky: Just curious, did you washer mod? I haven't done it to mine and was wondering if it is worth it? Seems to work great as it is with cutting pads and 205. not sure if the washer mod has a bigger advantage or increases cutting ability and saves even more time.


-Beach
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I've been using the washer mod since I got the machine. Tried it on half a car without, installed the washer and saw no reason to use it without. :props:

feslope said:
Same reason as Christopher Columbus and Neal Armstrong, they both used their equipment as provided figuring the engineers that designed it made it that way for a reason. My question is, "Why would you alter a brand new expensive piece of equipment?"
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For the same reason many people modify their cars....MORE POWER!

Rupes does have a good reason for designing the shroud to contact the backing plate they way it does, but for those who are experienced, know how to keep rotations speeds in check, and want more available power, the spacer make more sense.

If you want more info Kevin would probably be happy to go over why Rupes designed the tool the way they did and why he feels the spacer makes more sense.

What gets me is that people keep making it sound like the spacer is some crazy modification or something....which blows me away. All you're doing is adding a thin spacer (much like the ones you see on the PCXP, GG6, G110 backing plate) giving a few mm spacing between the plate and the shroud to allow the backing plate to spin freely... :dunno:
 
RaskyR1 said:
What gets me is that people keep making it sound like the spacer is some crazy modification or something....which blows me away. All you're doing is adding a thin spacer (much like the ones you see on the PCXP, GG6, G110 backing plate) giving a few mm spacing between the plate and the shroud to allow the backing plate to spin freely... :dunno:
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You sound like the kind of guy that will remove the tag from your mattress.


What a rebel.

:laughing:
 
ZimRandy said:
You sound like the kind of guy that will remove the tag from your mattress.


What a rebel.

:laughing:
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Damn Straight! :D


It also makes blowing out pads easier! I think that's what bothered me most about the shroud touching the backing plate. ;)
 
I did the washer mod. Didn't really notice much of anything different. I think the washer is still in there - mainly because I was too lazy to take it out. Either way, the Rupes' combos offers great correctional and finishing abilities, with very little thought, effort, skill, or risk. It's single shortcoming is than it can bog down occasionally on some convex/concave panels. This will not be an issue on 98% of the areas you are polishing.
 
RaskyR1 said:
If you want more info Kevin would probably be happy to go over why Rupes designed the tool the way they did and why he feels the spacer makes more sense.

What gets me is that people keep making it sound like the spacer is some crazy modification or something....which blows me away. All you're doing is adding a thin spacer (much like the ones you see on the PCXP, GG6, G110 backing plate) giving a few mm spacing between the plate and the shroud to allow the backing plate to spin freely... :dunno:
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It has to do with some sort of safety regulation that they have across the pond.
 
feslope said:
Same reason as Christopher Columbus and Neal Armstrong, they both used their equipment as provided figuring the engineers that designed it made it that way for a reason. My question is, "Why would you alter a brand new expensive piece of equipment?"
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That goes back to what he said. We tinker with things, we make them better. Over the last 2 years since I bought my car brand new I have spent about 30k modding it. Now its faster, stops better, turns better. Just because an engineer designs something a specific way doesn't mean it's been designed the best way. Other things come in to play such as laws, pricing goals, designing to the lowest common denominator person so they don't cut their head off or set themselves on fire, etc.

Many great things have been created by somebody building upon them. If we stuck with what we are given I doubt we would be as advanced as we are.

From what I remember reading the reason the backing plate rubs that guard had to do with local laws and safety. Not sure how true that is. But really, it's a tiny washer. It's basic to change out, and from looking where the plate connects to the polisher, I can't see how it will wear it any faster.

But the washer won't make up for improper technique. I only did it because I was changing the BP to the 5" and figured what the heck. Stock is boring on most things. lol
 
RaskyR1 said:
If you want more info Kevin would probably be happy to go over why Rupes designed the tool the way they did and why he feels the spacer makes more sense.
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LOL I think I will ask Rupes these questions at Detail Tech Expo.
 
OCD Detailing said:
I think Kevin Brown may know more. lol
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LOL Maybe!!

My above posting referred to "Detail Tech Expo' That should have read "Mobile Tech Expo" I could not edit it as too much time passed.

BTW I have the Rupes 15 and use it in stock configuration with Rupes products. Works OK for me. :buffing:
 
feslope said:
LOL I think I will ask Rupes these questions at Detail Tech Expo.
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That would only get you the full story in the shroud, not why Kevin suggests the washer. Kevin can give you both as he had many discussions with the engineers about it.
 
Just a guess, but the slow rotation in the video probably has more to do w/ the frame rate of the recording than bogging down. Just my $.02...
 
Thanks for weighing in on this Mike. I have the Rupes 15, Duetto and 75 all purchased from AG and have had nothing but excellent results with these tools. I have not done any modifications to any of them and do not plan on it.
 
custmsprty said:
Thanks for weighing in on this Mike. I have the Rupes 15, Duetto and 75 all purchased from AG and have had nothing but excellent results with these tools. I have not done any modifications to any of them and do not plan on it.
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I don't have any issues with anyone that does the mod and I have one Rupes 21 in our garage of about 25 polisher that does have the mod, it was a returned item from a customer.

Every car I've buffed out I done so using these tools as designed and for my personal work I've only used the Rupes system, that is Rupes tools, pads and products and the results are always show car quality.

When I made this time lapse video, I think the first ever time lapse using Rupes polishers to buff out an entire car, both the 15 and the 21 were as designed.


Rupes Polisher Time Lapse Video - 1955 Ford Crown Victoria


Here's the time-lapse video Yancy took for me as I buffed this classic out from start to finish...



[video=youtube_share;v7FjGcMCTEg&hd=1"]RUPES Bigfoot 21 versus Bigfoot 15 Time Lapse...[/video]​





TONS of pictures in the actual thread...


:xyxthumbs:
 
My Duetto arrived last night. I got it previously owned. The previous owner had the washer installed. The first thing I did was take it out because I wanted to see the "how's and why's" of the original design. Upon preliminary testing, I probably won't be re-installing the washer.
 
Prepped my wifes new car last weekend with Rupes 15 / 75 with BF Poly Clay, BF Gloss Enhancing Polish. Sealed and waxed with Blackfire Wet Ice Over Fire Combo. The Rupes machines performed exceptionally well, they are super smooth and so well balanced. The 75 is amazing for a 3" polisher I really love this machine.







 
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