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80MM Brake Calipers [message #118287]

Thu, 10 March 2011 06:41

mgrue

Messages: 192
Registered: October 2010
Location: Valmeyer IL

Karma: 0

Senior Member

Do the 80 MM brake calipers make enough of a difference to justify the extra cost of the lines bolts and higher price of the calipers? I will be towing and launching a pair of seadoos so light towing. I guess I am asking if you can notice the difference in braking power with an otherwise stock system. I am going to replace both calipers and pads on the front anyway so will be buying them one way or the other. Thanks for any insight.

Mark

Mark Grueninger 76 Palm Beach Valmeyer IL

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Re: 80MM Brake Calipers [message #118291 is a reply to message #118287]

Thu, 10 March 2011 07:13

Hardie Johnson

Messages: 483
Registered: January 2004
Location: Raleigh NC

Karma: 0

Senior Member

mgrue wrote on Thu, 10 March 2011 07:41

Do the 80 MM brake calipers make enough of a difference to justify the extra cost of the lines bolts and higher price of the calipers?<>Mark

It seems to me it would help; the cost is a wash since you should probably replace the hoses anyway. However, Jim Bounds will not supply hoses and thinks this is a bad modification. Apparently he knows something about this 'upgrade' so why not give him a call at the coop.

Hardie Johnson "Crashj"
1973 26 foot Glacier, White Thing
Raleigh NC

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Re: 80MM Brake Calipers [message #118293 is a reply to message #118287]

Thu, 10 March 2011 07:58

mgrue

Messages: 192
Registered: October 2010
Location: Valmeyer IL

Karma: 0

Senior Member

I am not familiar with Jim Bounds. How would I get in contact with him?

Thanks
Mark

Mark Grueninger 76 Palm Beach Valmeyer IL

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Re: [GMCnet] 80MM Brake Calipers [message #118294 is a reply to message #118287]

Thu, 10 March 2011 08:05

Mr ERFisher

Messages: 7117
Registered: August 2005

Karma: 2

Senior Member

a good question
and
I guess you read this about that ;>)

http://gmcmotorhome.info/brakes.html

gene

On Thu, Mar 10, 2011 at 4:41 AM, Mark Grueninger <markgrue@hotmail.com>wrote:

>
>
> Do the 80 MM brake calipers make enough of a difference to justify the
> extra cost of the lines bolts and higher price of the calipers? I will be
> towing and launching a pair of seadoos so light towing. I guess I am
> asking if you can notice the difference in braking power with an otherwise
> stock system. I am going to replace both calipers and pads on the front
> anyway so will be buying them one way or the other. Thanks for any
> insight.
>
> Mark
> --
> Mark Grueninger 76 Palm Beach
> Valmeyer IL
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
>

--
Gene Fisher -- 74-23,77PB/ore/ca
�Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
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Re: 80MM Brake Calipers [message #118296 is a reply to message #118293]

Thu, 10 March 2011 08:21

C Boyd

Messages: 2629
Registered: April 2006

Karma: 18

Senior Member

mgrue wrote on Thu, 10 March 2011 08:58

I am not familiar with Jim Bounds. How would I get in contact with him?

Thanks
Mark

http://www.gmccoop.com/

C. Boyd
76 Crestmont
East Tennessee

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Re: 80MM Brake Calipers [message #118297 is a reply to message #118293]

Thu, 10 March 2011 08:26

hertfordnc

Messages: 1164
Registered: September 2009
Location: East NC

Karma: 0

Senior Member

mgrue wrote on Thu, 10 March 2011 07:58

I am not familiar with Jim Bounds. How would I get in contact with him?

Jim Bounds is the man behind GMC COOP, He's in Orlando.

http://www.gmccoop.com/

This group places a very high value on his opinions as well as JimK of Applied GMC in Fremont California.

http://www.appliedgmc.com/

Between the tow of them you can get just about everything you need in the way answers and parts. And they are both very generous with information.

Dave & Ellen Silva Hertford, NC 76 Birchaven, 1-ton and other stuff Currently planning the Great american Road Trip Summer 2021 It's gonna take a lot of Adderall to get this thing right.

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Re: [GMCnet] 80MM Brake Calipers [message #118306 is a reply to message #118294]

Thu, 10 March 2011 09:29

cbwoodsr

Messages: 1063
Registered: February 2004

Karma: 0

Senior Member

gene--
FYI
on that page
http://gmcmotorhome.info/brakes.html

under 'Third Brake Light', top link http://www.gmcmhphotos.com/gallery/showalbum.php?aid=1086&uuid=rdenney

gives error.
The requested URL /gallery/showalbum.php was not found on this server.

just thought you'd like to know.. Very Happy

Very Happy

CBWood
77 Kingslay
MWC OK
ONLINE PARTS PROGRAM
www.GMCMHParts.com

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Re: [GMCnet] 80MM Brake Calipers [message #118307 is a reply to message #118297]

Thu, 10 March 2011 09:23

Mr ERFisher

Messages: 7117
Registered: August 2005

Karma: 2

Senior Member

many of our vendors are unwilling to install non-OEM equipment for
insurance reasons.

many of us make changes "because we can"
disk brakes
non dot-parking brakes
etc,

so often decisions are made for financial risk reasons, not for performance
reasons.

gene

On Thu, Mar 10, 2011 at 6:26 AM, dave silva <admin@oldrv.net> wrote:

>
>
> mgrue wrote on Thu, 10 March 2011 07:58
> > I am not familiar with Jim Bounds. How would I get in contact with him?
>
>
> Jim Bounds is the man behind GMC COOP, He's in Orlando.
>
> http://www.gmccoop.com/
>
>
> This group places a very high value on his opinions as well as JimK of
> Applied GMC in Fremont California.
>
>
> http://www.appliedgmc.com/
>
> Between the tow of them you can get just about everything you need in the
> way answers and parts. And they are both very generous with information.
> --
> Dave & Ellen Silva
>
>
> Check out the website:
>
> http://www.oldrv.net
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
>

--
Gene Fisher -- 74-23,77PB/ore/ca
�Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
_______________________________________________
GMCnet mailing list
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Re: [GMCnet] 80MM Brake Calipers [message #118310 is a reply to message #118306]

Thu, 10 March 2011 10:15

Mr ERFisher

Messages: 7117
Registered: August 2005

Karma: 2

Senior Member

Tanks
Will go look

Gene

Sent from McDonalds

On Mar 10, 2011, at 7:29 AM, Charles Wood <cbwoodsr@swbell.net> wrote:

>
>
> gene--
> FYI
> on that page
> http://gmcmotorhome.info/brakes.html
>
>
> under 'Third Brake Light', top link http://www.gmcmhphotos.com/gallery/showalbum.php?aid=1086&uuid=rdenney
>
> gives error.
> The requested URL /gallery/showalbum.php was not found on this server.
>
> just thought you'd like to know.. :d
> --
> CBWood
> 77 Kingslay
> MWC OK
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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Re: [GMCnet] 80MM Brake Calipers [message #118316 is a reply to message #118287]

Thu, 10 March 2011 10:45

Gary Worobec

Messages: 867
Registered: May 2005

Karma: -1

Senior Member

Hi,
I installed 80mm calipers on the front and and then stainless brake lines on
all 6 wheels on my 23. I think the brake lines did more than the calipers.
Better pedal feel for sure. If you think your regular rubber brake lines are
OEM you might consider changing them out as they do deteriorate over time.

Thanks

Gary and Joanne Worobec
1973 GMC Glacier
Anza, CA

----- Original Message -----
From: "Mark Grueninger" <markgrue@hotmail.com>
To: <gmclist@temp.gmcnet.org>
Sent: Thursday, March 10, 2011 4:41 AM
Subject: [GMCnet] 80MM Brake Calipers

>
>
> Do the 80 MM brake calipers make enough of a difference to justify the
> extra cost of the lines bolts and higher price of the calipers? I will
> be towing and launching a pair of seadoos so light towing. I guess I am
> asking if you can notice the difference in braking power with an otherwise
> stock system. I am going to replace both calipers and pads on the front
> anyway so will be buying them one way or the other. Thanks for any
> insight.
>
> Mark
> --
> Mark Grueninger 76 Palm Beach
> Valmeyer IL
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclistNK

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Re: 80MM Brake Calipers [message #118336 is a reply to message #118287]

Thu, 10 March 2011 15:32

psakw

Messages: 61
Registered: February 2010

Karma: 0

Member

Mark:
I was taking a trip to Alaska and doing the mountains out west last summer. I installed the 80mm calipers from Jim K and lines, then put singed metallic pads in front and singed metallic linings in the rear after cutting the drums. WOW ! the brakes were much better then stock and did not fade going down the big hills. Did not change the master cylinder.

Paul A
73 Sequoia
Key West, Florida

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Re: [GMCnet] 80MM Brake Calipers [message #118338 is a reply to message #118336]

Thu, 10 March 2011 15:36

k2gkk

Messages: 4452
Registered: November 2009

Karma: -8

Senior Member

Did you mean sintered pads and linings?

~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
~~ ~ D C "Mac" Macdonald ~ ~~
~ ~ Amateur Radio - K2GKK ~ ~
~ ~ USAF and FAA, Retired ~ ~
~ ~ ~ Oklahoma City, OK ~ ~ ~
~~ ~ ~ "The Money Pit" ~ ~ ~~
~ ~ ~ ex-Palm Beach, 76 ~ ~ ~
~ www.gmcmhphotos.com/okclb ~
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~

----------------------
> To: gmclist@temp.gmcnet.org
> From: pumppal1@aol.com
> Date: Thu, 10 Mar 2011 15:32:34 -0600
> Subject: Re: [GMCnet] 80MM Brake Calipers
>
>
>
> Mark:
> I was taking a trip to Alaska and doing the mountains out west last summer. I installed the 80mm calipers from Jim K and lines, then put singed metallic pads in front and singed metallic linings in the rear after cutting the drums. WOW ! the brakes were much better then stock and did not fade going down the big hills. Did not change the master cylinder.
>
> Paul A
> 73 Sequoia
> Key West, Florida
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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Re: [GMCnet] 80MM Brake Calipers [message #118340 is a reply to message #118338]

Thu, 10 March 2011 16:00

cbwoodsr

Messages: 1063
Registered: February 2004

Karma: 0

Senior Member

depends on how hard you have to stop.... Smile

Smile

CBWood
77 Kingslay
MWC OK
ONLINE PARTS PROGRAM
www.GMCMHParts.com

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Re: [GMCnet] 80MM Brake Calipers [message #118343 is a reply to message #118340]

Thu, 10 March 2011 16:27

Keith V

Messages: 2337
Registered: March 2008
Location: Mounds View,MN

Karma: 0

Senior Member

If you are doing the front brakes you should upgrade tot he 80mm calipers. The cost is the same and you WILL be replacing the lines anyway.

'will' as in they most certainly need to be replaced.

I put them on my GMC and yes they help. Make sure you get good pads as the 'lifetime' pads do not stop well...

Keith Vasilakes
Mounds View. MN
75 ex Royale GMC
ask me about MicroLevel
Cell, 763-732-3419
My427v8@hotmail.com

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Re: [GMCnet] 80MM Brake Calipers [message #118350 is a reply to message #118294]

Thu, 10 March 2011 17:10

Ken Henderson

Messages: 8726
Registered: March 2004
Location: Americus, GA

Karma: 9

Senior Member

That link is a bit misleading. The first item to appear is Dave Mumert's
explanation of the FACT that braking force is independent of PAD area. He
happened to mention an 80 mm caliper in that example. But the caliper
piston size (the 80 mm) has nothing to do with that explanation. If you
follow the link to Dave's spreadsheet and check the braking force applied by
a 70 mm caliper, you'll find that it's only 6000 pounds of force, vs the
7800 pounds with an 80 mm caliper.

The 80 mm caliper will definitely provide more braking force.

Ken H.

On Thu, Mar 10, 2011 at 9:05 AM, Mr.erf ERFisher <mr.erfisher@gmail.com>wrote:

> a good question
> and
> I guess you read this about that ;>)
>
> http://gmcmotorhome.info/brakes.html
>
>
> gene
>
>
>
>
> On Thu, Mar 10, 2011 at 4:41 AM, Mark Grueninger <markgrue@hotmail.com
> >wrote:
>
> >
> >
> > Do the 80 MM brake calipers make enough of a difference to justify the
> > extra cost of the lines bolts and higher price of the calipers? I will
> be
> > towing and launching a pair of seadoos so light towing. I guess I am
> > asking if you can notice the difference in braking power with an
> otherwise
> > stock system. I am going to replace both calipers and pads on the front
> > anyway so will be buying them one way or the other. Thanks for any
> > insight.
> >
> > Mark
> > --
> >
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach

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Re: 80MM Brake Calipers [message #118354 is a reply to message #118287]

Thu, 10 March 2011 17:22

RF_Burns

Messages: 2277
Registered: June 2008
Location: S. Ontario, Canada

Karma: 3

Senior Member

I have a Hubler front end kit plus rear disk kit with the P30 MC coming.
From what I've read, what I gain with the bigger caliper pistons, I lose with the larger P30 MC.

I'm hoping the the larger diameter front disks will make up a bit for that.

What say ye?

Bruce Hislop
ON Canada
77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.
1 ton front end
http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
My Staff says I never listen to them, or something like that

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Re: [GMCnet] 80MM Brake Calipers [message #118355 is a reply to message #118343]

Thu, 10 March 2011 17:23

WD0AFQ

Messages: 7111
Registered: November 2004
Location: Dexter, Mo.

Karma: 207

Senior Member

Keith V wrote on Thu, 10 March 2011 16:27

If you are doing the front brakes you should upgrade tot he 80mm calipers. The cost is the same and you WILL be replacing the lines anyway.

'will' as in they most certainly need to be replaced.

I put them on my GMC and yes they help. Make sure you get good pads as the 'lifetime' pads do not stop well...

Keith, I am with you on those lifetime pads.
dan

3 In Stainless Exhaust Headers One Ton All Discs/Reaction Arm 355 FD/Quad Bag/Alum Radiator Manny Tran/New eng. Holley EFI/10 Tire Air Monitoring System Solarized Coach/Upgraded Windows Satelite TV/On Demand Hot Water/3Way Refer

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Re: 80MM Brake Calipers [message #118410 is a reply to message #118287]

Fri, 11 March 2011 09:48

mgrue

Messages: 192
Registered: October 2010
Location: Valmeyer IL

Karma: 0

Senior Member

Well I bit the bullet and went to o reilly and got the 80MM brake calipers hoses pads and bolts. they had it all in stock. Much nicer then having to wait for the original equipment stuff. Got the left side on this morning Will let you know how it stops when i get the other side done. thanks for all the information.

Mark

Mark Grueninger 76 Palm Beach Valmeyer IL

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Re: [GMCnet] 80MM Brake Calipers [message #118411 is a reply to message #118410]

Fri, 11 March 2011 09:50

k2gkk

Messages: 4452
Registered: November 2009

Karma: -8

Senior Member

Hi, Mark.

Could you please list the O-Reilly part numbers
and quantities for this project?

TNX.

~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
~~ ~ D C "Mac" Macdonald ~ ~~
~ ~ Amateur Radio - K2GKK ~ ~
~ ~ USAF and FAA, Retired ~ ~
~ ~ ~ Oklahoma City, OK ~ ~ ~
~~ ~ ~ "The Money Pit" ~ ~ ~~
~ ~ ~ ex-Palm Beach, 76 ~ ~ ~
~ www.gmcmhphotos.com/okclb ~
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~

> To: gmclist@temp.gmcnet.org
> From: markgrue@hotmail.com
> Date: Fri, 11 Mar 2011 09:48:52 -0600
> Subject: Re: [GMCnet] 80MM Brake Calipers
>
>
>
> Well I bit the bullet and went to o reilly and got the 80MM brake calipers hoses pads and bolts. they had it all in stock. Much nicer then having to wait for the original equipment stuff. Got the left side on this morning Will let you know how it stops when i get the other side done. thanks for all the information.
>
> Mark
> --
> Mark Grueninger 76 Palm Beach
> Valmeyer IL
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Re: [GMCnet] 80MM Brake Calipers [message #118412 is a reply to message #118410]

Fri, 11 March 2011 09:56

Mr ERFisher

Messages: 7117
Registered: August 2005

Karma: 2

Senior Member

this is probubly the point

the 80 mm stuff is in-stock and easy to get
the 70 mm calipers in new-old-stock, and is not in stock in most parts
houses

since the front brakes have a separate piston and reservoir, this should not
require a master cyl. change.

gene

On Fri, Mar 11, 2011 at 7:48 AM, Mark Grueninger <markgrue@hotmail.com>wrote:

>
>
> Well I bit the bullet and went to o reilly and got the 80MM brake calipers
> hoses pads and bolts. they had it all in stock. Much nicer then having
> to wait for the original equipment stuff. Got the left side on this
> morning Will let you know how it stops when i get the other side done.
> thanks for all the information.
>
> Mark
> --
> Mark Grueninger 76 Palm Beach
> Valmeyer IL
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>

--
Gene Fisher -- 74-23,77PB/ore/ca
�Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
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