feedback on 8" boosters - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Pont406 · 09-26-2012, 01:18 AM

Thinking of buying a smaller booster to get more room and maybe it will help with low vacuum. Something similar to this one http://www.ebay.com/itm/221036147208...84.m1423.l2649
Did any one try one yet? How is a feedback on them? I already have power brakes but can't find a small booster by itself . I want to get some runs at Irwindale 1/8 mile and theirs shut down area design mostlly for newer vehicles. Even at 80mps somtimes it's a bicth to get off. It will be a little faster now. Thanks a lot

Sammy · 09-26-2012, 09:27 AM

I have one on my GMC. Heard before I purchased it that if you have a radical cam that the vaccum it produces would effect it's operation. I am using it with a basic stock 350 and have noticed no noticeable reduced performance. Those 8" are available individually without buying everything in a package both on E-Bay all the time. I believe CPP even sells them also. If your engine is beyond a stock configuration I would recommend contacting someone who has expertise in smaller boosters to figure what you would be satisfied with.

PanelDeland · 09-26-2012, 09:38 AM

I'm using one on a stock 250 6 cyl.It works well.Doesn't make the brakes better but does reduce pedall pressure.It also gave me enough room to miss the induction system(carb,intake air cleaner).

**derotoreut** · 09-26-2012, 08:10 PM

Quote:

Originally Posted by Pont406

Thinking of buying a smaller booster to get more room and maybe it will help with low vacuum. Something similar to this one http://www.ebay.com/itm/221036147208...84.m1423.l2649
Did any one try one yet? How is a feedback on them? I already have power brakes but can't find a small booster by itself . I want to get some runs at Irwindale 1/8 mile and theirs shut down area design mostlly for newer vehicles. Even at 80mps somtimes it's a bicth to get off. It will be a little faster now. Thanks a lot

I don't think an 8" dual booster will do much different then an 11" single. How much vacuum pressure is your engine producing? I have an 8" dual with a 383 Stroker motor that produces 11" of vacuum. I'm not that impressed. If I were you and running this on the strip I would consider adding a vacuum can.

*Fitz* · 09-26-2012, 08:58 PM

Quote:

Originally Posted by Pont406

Thinking of buying a smaller booster to get more room and maybe it will help with low vacuum. Something similar to this one http://www.ebay.com/itm/221036147208...84.m1423.l2649
Did any one try one yet? How is a feedback on them? I already have power brakes but can't find a small booster by itself . I want to get some runs at Irwindale 1/8 mile and theirs shut down area design mostlly for newer vehicles. Even at 80mps somtimes it's a bicth to get off. It will be a little faster now. Thanks a lot

I use an 8" dual diaphragm booster on my 67. The engine is too wide for the stock unit and with it's fairly radical cam this motor makes only 9 in of vacuum, not the 16 or so most boosters need to function correctly so...I installed a remote vacuum pump to run the booster. Works just fine.

Pont406 · 10-11-2012, 12:51 AM

Got it in tonight and put some miles on it. At least now I have room to remove valve covers. For some reasons brake light is coming on and off but i never opened the system.

GMCJOE · 10-11-2012, 09:28 AM

Probably cause your rod from the booster isn't seated on the piston of the MC correctly yet.

Transformula · 10-12-2012, 09:04 PM

Pontiac engine..... Good Choice!!

Fldawg · 10-12-2012, 09:08 PM

most people use the small one for clearance , if you have the room go with the 11"

09-26-2012, 01:18 AM	#1
Pont406 Registered User Join Date: Aug 2007 Location: West Hills, California Posts: 679	feedback on 8" boosters Thinking of buying a smaller booster to get more room and maybe it will help with low vacuum. Something similar to this one http://www.ebay.com/itm/221036147208...84.m1423.l2649 Did any one try one yet? How is a feedback on them? I already have power brakes but can't find a small booster by itself . I want to get some runs at Irwindale 1/8 mile and theirs shut down area design mostlly for newer vehicles. Even at 80mps somtimes it's a bicth to get off. It will be a little faster now. Thanks a lot

09-26-2012, 09:27 AM	#2
Sammy Registered User Join Date: Apr 2000 Location: Bonne Terre, Mo Posts: 3,005	Re: feedback on 8" boosters I have one on my GMC. Heard before I purchased it that if you have a radical cam that the vaccum it produces would effect it's operation. I am using it with a basic stock 350 and have noticed no noticeable reduced performance. Those 8" are available individually without buying everything in a package both on E-Bay all the time. I believe CPP even sells them also. If your engine is beyond a stock configuration I would recommend contacting someone who has expertise in smaller boosters to figure what you would be satisfied with. __________________ '69 Chevy Long Fleet & '71 GMC Short Step & Project "ODD BALL" "You can wash a pig, soak it in most expensive perfume. In the end it is still just a pig." ODD BALL build thread http://67-72chevytrucks.com/vboard/s...d.php?t=478629"

09-26-2012, 09:38 AM	#3
PanelDeland I am a Referee of life. Join Date: Jun 2000 Location: Greensboro N.C. Posts: 13,992	Re: feedback on 8" boosters I'm using one on a stock 250 6 cyl.It works well.Doesn't make the brakes better but does reduce pedall pressure.It also gave me enough room to miss the induction system(carb,intake air cleaner). __________________ The 47-present Chevrolet and GMC Truck Message Board Network,it's owners,moderators,members,and associates of any type should not be held responsible for my opinion. You can't fix stupid,not even with duct tape. "My appearance is due to the fact that "GOD" does punish you for having too much fun!" Barrett-Jackson has perfected alchemy,they make rust into gold! "You can lead a horse to water but you can't saddle a duck" "Cleverly disguised as a 'Responsible Adult' "Sometimes your Knight in shining armor is just a retard in tinfoil"

10-11-2012, 12:51 AM	#6
Pont406 Registered User Join Date: Aug 2007 Location: West Hills, California Posts: 679	Re: feedback on 8" boosters Got it in tonight and put some miles on it. At least now I have room to remove valve covers. For some reasons brake light is coming on and off but i never opened the system. Attached Images

10-11-2012, 09:28 AM	#7
GMCJOE Registered User Join Date: Aug 2012 Location: Junction City, KS Posts: 782	Re: feedback on 8" boosters Probably cause your rod from the booster isn't seated on the piston of the MC correctly yet. __________________ Joseph Joe's 69 GMC http://67-72chevytrucks.com/vboard/s...d.php?t=543253 1969 GMC SWB-350 SBC 700R4 2013 Ram 2500 CC Laramie Longhorn Edition-6.7 PPEI EFI Live CSP5 5” ProFlo Exhaust

10-12-2012, 09:04 PM	#8
Transformula Registered User Join Date: Nov 2010 Location: Las Vegas, Nevada Posts: 160	Re: feedback on 8" boosters Pontiac engine..... Good Choice!! __________________ T.Y.N Custom Works..... Because "Stock" Sucks! 1971 K 10 GMC Long Bed 1977 Formula T/A Frame off Resto-Mod 1995 FXDL Harley Low Rider 1985 C10 ShortWide 91 Burb front.

10-12-2012, 09:08 PM	#9
Fldawg Registered User Join Date: Jan 2011 Location: Lynn Haven Florida Posts: 1,019	Re: feedback on 8" boosters most people use the small one for clearance , if you have the room go with the 11"



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