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Old 03-25-2019, 04:15 PM   #1
cerial
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Hydroboost line question

I have a 87 which i am swaping in a 02 Silverado 5.3 and have 04 van hydroboost. I cut the firewall out of the 04 taking the boost and pedal pump and lines as a unit.

I am going to make some pedals maintaining the 04's ratio with a bell crank letting me go 90 and have a long rod pushing the hydroboost master which will be located behind the glove box.



Line wise can I eave the power steering pump in the 5.3's stock location on the drivers side with long lines feeding the hydroboost?

Or would i be better off moving the pump to the passenger side and have shorter lines feeding the hydroboost and longer lines going to the steering box?

Placing it on the passenger side allows for shorter high pressure line lengths. But if it is not going to matter much then I would perfer to keep the pump in the stock location not messing with the belt at all.

I dont have any extra steering boxes and should replace the one i am running now. Is there one I should run with that 04 pump/master or will one for a 87 be good.
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Old 03-25-2019, 06:52 PM   #2
mongocanfly
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Re: Hydroboost line question

I kept my stock steering box on my 81and the 02 LS pump is just fine running it and the hydroboost...I'd keep it on the driver side...just to make it easier to plumb the steering box...the longer lines to the hydroboost wont matter
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Old 03-25-2019, 11:40 PM   #3
cerial
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Re: Hydroboost line question

Thank you
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Old 07-19-2021, 08:07 AM   #4
mcmlxix
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Re: Hydroboost line question

Can someone confirm the Hydro-Boost Lines:
HI input - FROM Power Steering Pump
HI Output - TO Power Steering Box
LO Output - RETURN to reservoir

Also, can someone confirm the Front Port on the master cylinder is for the front brake circuit and rear for rear?
I'm think it's logical but I want to make sure before I actually start bending hard lines....

I'm posting here in this group but swapping this setup into my 72 K5 using one ton axles and 4 wheel disc brakes ....
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Old 07-20-2021, 02:16 AM   #5
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Re: Hydroboost line question

Someone was nice enough to send me a link with some info here are diagrams/photo if it helps anyone else....
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Old 07-20-2021, 07:14 PM   #6
hatzie
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Re: Hydroboost line question

I don't believe the front and rear make any difference at all on a T800 disc/disc master cylinder.
The ABS controller takes care of brake bias on the T800. The 67-72 trucks used a combination valve to bias the brakes.

The stock 67-72 combination valve is setup to bias disc drum setups. Make sure your combination valve is setup for 4 wheel discs.
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