small brake booster - The 1947 - Present Chevrolet & GMC Truck Message Board Network

XXL · 03-21-2003, 11:17 PM

Small brake booster...

like this one being hawked by GMCPauls--

Is there any loss in performance over the bigger booster? If no, then why do/did they make the larger one?? Is this a 100% bolt-on? Do I have to steal any parts of my existing booster? Like the push rod or???

I may need a brake booster after all, and if I'm replacing, I'd sure like to go with as small as possible.

Anyone used this one??

Kenneth

Mike C · 03-21-2003, 11:50 PM

The large booster is cheaper for OEM to make. The small boosters are usually dual diaphragm. This keeps the overall diamphragm surface area the same but reduces the case diameter, but increases its thickness.

Longhorn Man · 03-22-2003, 01:05 AM

The big ones in the 3/4 and one ton trucks were dual diaphragm too.

spinning wheels · 03-22-2003, 02:36 AM

I just installed a smaller booster, along with a new proportioning valve and master cylinder. I deleted the linkage from the stock booster. The new rod goes straight from the brake pedal to the booster. As soon as I can bleed the brake system, I can let you know how it works. Been working too many hours to work on the truck and with gas at $2.15 for the cheap stuff, I won't be driving the truck much.

XXL · 03-28-2003, 01:38 PM

Quote:

Originally posted by spinning wheels
I just installed a smaller booster, along with a new proportioning valve and master cylinder. I deleted the linkage from the stock booster. The new rod goes straight from the brake pedal to the booster. As soon as I can bleed the brake system, I can let you know how it works. Been working too many hours to work on the truck and with gas at $2.15 for the cheap stuff, I won't be driving the truck much.

Thanks for the info. Is what you did on the new rod the way it's supposed to be or did you modify something? Better said, is switching to the smaller booster a "bolt-in" process?

Thanks again,

Kenneth

spinning wheels · 03-29-2003, 09:35 PM

The shop I purchased my booster from, fabricated some brackets for the smaller booster. It is now closer to the firewall. Since I plan on installing a big block, I need the room.

bigratfan · 04-05-2003, 01:06 AM

hey Spinning wheel, I'm interested in your M/C booster set-up and weather it works or not, cause I need to change out mine too. Anyway since I'm just down the road from you it would be easy for me to pop over and have a look. let me know.

spinning wheels · 04-06-2003, 12:47 AM

bigratfan, you got a pm.

XXL · 04-06-2003, 12:59 AM

Quote:

Originally posted by bigratfan
hey Spinning wheel, I'm interested in your M/C booster set-up and weather it works or not, cause I need to change out mine too. Anyway since I'm just down the road from you it would be easy for me to pop over and have a look. let me know.

Take a digicam!

Kenneth

*rage'nrat638* · 04-06-2003, 09:11 AM

that small booster works good for hi-pro deals like mine bb needing to pull off valve covers and such also had to buy a vacuum pump from mpbrakeshttp://www.mpbrakes.com/index.htm
check that out for vac.pump if you need one ......mp sells that small boosterfor about $400.00 i bought mine from some little place in penn.for only $225.00 they have no web site...so shop around....if you really e
want to know where i got mine..send me a P.M. and i will look for the ticket from there.....on my truck i just ground off the stock rivits on the old booster and it fit right on the new smaller booster....the rod i cut off the stock booster ...drilled and tapped it out and screwed it right on the new booster

now thats a tall block with tall valve covers and still have 21/2" of clearence......mark

03-21-2003, 11:17 PM	#1
XXL Señor Member Join Date: May 2002 Location: Edge of the world Posts: 5,367	small brake booster Small brake booster... like this one being hawked by GMCPauls-- Is there any loss in performance over the bigger booster? If no, then why do/did they make the larger one?? Is this a 100% bolt-on? Do I have to steal any parts of my existing booster? Like the push rod or??? I may need a brake booster after all, and if I'm replacing, I'd sure like to go with as small as possible. Anyone used this one?? Kenneth __________________ Craigslist \| ebay \| Engrishtees \| www.myattitudesucks.com \| Follow me on Twitter

03-21-2003, 11:50 PM	#2
Mike C Registered User Join Date: Dec 1999 Location: Austin, TX, USA Posts: 7,727	The large booster is cheaper for OEM to make. The small boosters are usually dual diaphragm. This keeps the overall diamphragm surface area the same but reduces the case diameter, but increases its thickness. __________________ 44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax

03-22-2003, 02:36 AM	#4
spinning wheels Registered User Join Date: Sep 2001 Location: Hacienda Heights, California USA Posts: 474	I just installed a smaller booster, along with a new proportioning valve and master cylinder. I deleted the linkage from the stock booster. The new rod goes straight from the brake pedal to the booster. As soon as I can bleed the brake system, I can let you know how it works. Been working too many hours to work on the truck and with gas at $2.15 for the cheap stuff, I won't be driving the truck much. __________________ '72 GMC custom camper 350/350

03-29-2003, 09:35 PM	#6
spinning wheels Registered User Join Date: Sep 2001 Location: Hacienda Heights, California USA Posts: 474	The shop I purchased my booster from, fabricated some brackets for the smaller booster. It is now closer to the firewall. Since I plan on installing a big block, I need the room. __________________ '72 GMC custom camper 350/350

04-06-2003, 12:47 AM	#8
spinning wheels Registered User Join Date: Sep 2001 Location: Hacienda Heights, California USA Posts: 474	bigratfan, you got a pm. __________________ '72 GMC custom camper 350/350

03-22-2003, 01:05 AM	#3
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	The big ones in the 3/4 and one ton trucks were dual diaphragm too.

04-05-2003, 01:06 AM	#7
bigratfan Registered User Join Date: Aug 2002 Location: baldwin park ca. Posts: 24	hey Spinning wheel, I'm interested in your M/C booster set-up and weather it works or not, cause I need to change out mine too. Anyway since I'm just down the road from you it would be easy for me to pop over and have a look. let me know.

04-06-2003, 09:11 AM	#10
rage'nrat638 Account Suspended Join Date: Mar 2003 Location: THE FALL GUY CHICAGO IL Posts: 5,883	small booster that small booster works good for hi-pro deals like mine bb needing to pull off valve covers and such also had to buy a vacuum pump from mpbrakeshttp://www.mpbrakes.com/index.htm check that out for vac.pump if you need one ......mp sells that small boosterfor about $400.00 i bought mine from some little place in penn.for only $225.00 they have no web site...so shop around....if you really e want to know where i got mine..send me a P.M. and i will look for the ticket from there.....on my truck i just ground off the stock rivits on the old booster and it fit right on the new smaller booster....the rod i cut off the stock booster ...drilled and tapped it out and screwed it right on the new booster now thats a tall block with tall valve covers and still have 21/2" of clearence......mark

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