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Old 03-25-2007, 03:25 PM
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Power brakes with a zz502

Can anyone tell me if a ZZ502 has enough vacuum for power brakes? I am halfway threw building my car and would like to find out if I have to address a low vacuum condition now, rather then after the car is finished. Any info at all would be great, Thanks

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Old 03-25-2007, 06:40 PM
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Hi Greg,
I'm not sure about the 502, but why not eliminate the entire vacuum thing with a hydrovac master cylinder for the brakes? If your not familiar with this unit, it uses some hydraulic pressure from the power steering to apply pressure to the master cylinder to apply the brakes. Plus it gets rid of the big ugly vacuum canister for the brakes. I used this setup on my 350 S-10 as well as my 350 powered 51 Willys for years now and haven't had a bit of trouble. If memory serves me correctly I got the hydrovac from a Chevy Astrovan, but there are a number of chevy vehicles (especially late model diesels) that use the same setup. I used the Astrovan and S10 ends and had a couple of hoses made up at my local Tubes and Hoses dealer for about $20. For more idea information, check out: www.hydratechbraking.com or www.mpbrakes.com
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Old 03-25-2007, 07:05 PM
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Quote:
Originally Posted by copndoc3
Hi Greg,
Plus it gets rid of the big ugly vacuum canister for the brakes.
yeah. and replaces it with a smaller ugly thing that has hoses hanging off of it.
but, they do work well.
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Old 03-25-2007, 07:18 PM
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The ZZ502 as delivered has plenty of vacuum to run power brakes, it has a very mild mannered idle.

Vince
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