Conversion to Hydro Boost Brake System - 1970 El Camino - Page 3 - El Camino Central Forum : Chevrolet El Camino Forums
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  #31  
Old 02-04-2017, 10:55 PM
Tokageroh Tokageroh is offline
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I am using the hydratech braking system in my 83 elky, since im using a "cammy' motor. I found that for this generation your going to need a shorter master cylinder which hydratech does sell as oem and a wilwood style will end up hitting the bottom of the hood as these units stick out more then vac assist units.

Since i was doing a full tear down on my elky anyway i replaced front calipers with ssbc 2 piston units, rear wheel cylinders with enlarged ones (s10 i think), all the hoses are now braided lines. and the hard-lines are all stainless. i even added an adjustable proportioning valve, and line lock to the mix.

it takes a little while to get the air bubbles out of the booster unit, as i found out. even after the rest of the system wasn't making any noise from bubbles, some inevitably got trapped in the unit due to it being the highest point in the ps system. Now that its been run for awhile and the air pockets are out. I feel like my car stops better then most cars ive driven on the road.

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  #32  
Old 06-17-2017, 04:36 AM
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I'm looking into a conversion like this when I get my 1970. after I'm set up to transport my chair first thing on the list is safety upgrades. and the way people drive where I live I been wanting to do a hydro boost setup. I have debated if a 12.19" wildwood breaks conversion would go well on a set up like that or staying disk drum would be okay with hydro boost. id only go 12.19 so I could clear the 15" wheels I want to use. looking at willwood's Front Brake Kit Part No.: 140-10510-DR and Rear Brake Kit – Part No.: 140-2112-DR.
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  #33  
Old 06-17-2017, 05:52 AM
B52bombardier1 B52bombardier1 is offline
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I'm considering a stroker 383 as a crate replacement engine for my car running whatever cam they put in it. I wonder if it will not make enough vacuum to need a boost kit like this. I'm also replacing the front drum brakes on my 70 El Camino with disks.

These upgrades are still a while in the future but this thread is a very interesting discussion.

Rick
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  #34  
Old 06-17-2017, 09:38 AM
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Rick
Depending on how close to turn key your crate engine is when shipped, your builder should be able to give you a good idea of the expected vacuum.

I would think a call to BluePrint would get you an answer to help with budgeting engine and brakes (vac produced by their different 383 offerings).
http://blueprintengines.com/index.ph...ng/gm-383-main
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  #35  
Old 06-25-2017, 02:24 PM
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would u recommend adding some kind big brake system to go with the hydro boost system like willwood? I know they require bigger rims but I want car that can put u thru the windshield to stop in a emergency.
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  #36  
Old 06-25-2017, 02:52 PM
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My budget would only allow one or the other.
The blower cam was making a decision.
So far, I am doing OK with just hydroboost, so I will not be upgrading to bigger brakes.
I still need to budget for upcoming rear drums, and better shoes and pads.

I know you like blue 70 El Caminos. Below is an image just before dusk sets of Blue Thunder with original 17 inch Boyd Coddington two piece JunkYard Dog rims.
They are similar to the 5 spokes you were looking at earlier. They are now reproduced as a one piece.
https://www.summitracing.com/search/...s?N=4294920356
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Last edited by Old Bear; 06-25-2017 at 03:05 PM.
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  #37  
Old 06-25-2017, 07:27 PM
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Quote:
Originally Posted by Old Bear View Post
My budget would only allow one or the other.
The blower cam was making a decision.
So far, I am doing OK with just hydroboost, so I will not be upgrading to bigger brakes.
I still need to budget for upcoming rear drums, and better shoes and pads.

I know you like blue 70 El Caminos. Below is an image just before dusk sets of Blue Thunder with original 17 inch Boyd Coddington two piece JunkYard Dog rims.
They are similar to the 5 spokes you were looking at earlier. They are now reproduced as a one piece.
https://www.summitracing.com/search/...s?N=4294920356
so the stock brakes with new pads and shoes work really good with the hydro boost huh. I found a OEM GM color called forest green I really like.



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  #38  
Old 06-28-2017, 07:47 AM
cquester5 cquester5 is offline
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Here is my 1969 OEM color "Fathom Green"

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  #39  
Old 07-14-2018, 03:14 PM
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Here are a couple of pictures of my 72 Hydro Boost installation. Have not tried it. ElCo is still a project on jack stands. Big valve covers and a solid roller cam with low idle vacuum drove the decision.
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  #40  
Old 07-14-2018, 09:06 PM
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Larry
Thank you for adding good quality images to this thread.
Once you have had a chance to use it for a while in normal driving, it would be good to hear your thoughts.
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  #41  
Old 07-15-2018, 10:50 AM
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I’m close to getting it running. But without doors, glass and front sheet metal, I’ll be limited to my drive way and the neighborhood if I dare!
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  #42  
Old 07-24-2018, 02:20 PM
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Update: I put power steering fluid in and turned the motor over with a remote starter switch to build some pressure and test for leaks. Bad leak! Turns out that the return fitting on the Hydro Boost had a crack. Took the unit out because the fitting threads broke off inside the unit. Got that out and ordered an eBay replacement but stainless instead of brass. Hopefully I will get it back in this weekend and try again for other leaks. Is it just me?
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  #43  
Old 07-24-2018, 02:53 PM
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https://www.powerperformancenews.com...acuum-booster/


https://www.elcaminocentral.com/showthread.php?t=227858



PRO: cheaper than other aftermarket vacuum pumps, uses OEM componants, quiet, still works if motor stalls.


CONS: none I've experienced, we've installed this on two vehicles, its completely invisible.
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  #44  
Old 07-24-2018, 03:48 PM
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Larry
Your images don't show that part of the install. Were you using brass banjo A/N connectors? Is that what broke?
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  #45  
Old 07-28-2018, 07:35 AM
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It was the brass return fitting that came with the unit. I had adapted it to AN-6 using a union. The extra length probably acted as a lever and helped create a condition where if bumped the brass could crack and eventually break. The replacement will avoid the union as it has an AN/6 male. The little piece of threads on the top right is what broke. Second picture shows the new fitting in place.
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