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EVfun
Samba Member
Joined: April 01, 2012
Posts: 5489
Location: Seattle
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 Posted: Sun Mar 10, 2024 11:23 pm Post subject: Re: Brakes |
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| oprn wrote: |
No the '86 944 N/A rear discs are single piston.
I will keep searching for a RPV with the correct flares and metric threads. All I have found so far in universal ones with a 1/8 npt thread then you have to select adaptor fittings. |
It's EMPI, but available and adapters are not required. You should only need 2 for 4 wheel disc brakes if you split the front lines after the residual pressure valve.
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| Wildthings wrote: |
| As a general rule, cheap parts are the most expensive parts you can buy. |
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Busstom
Samba Member
Joined: November 23, 2014
Posts: 3855
Location: San Jose, CA
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| Posted: Mon Mar 11, 2024 12:37 am Post subject: Re: Brakes |
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| EVfun wrote: |
I don’t think would hurt, but isn’t the setup you’re working on using 4 piston calipers with 1.75 inch pistons? 2 psi is about 10 pounds of clamping force on those brake pads. Light drag like that probably won’t generate any real heat.
Most modern cars with manual transaxle have a clutch that doesn’t need adjustment. Do you know why? The throwout bearing remains in light contact with the pressure plate. It spins under very light load for 100k plus miles without failing. I suspect just 9 or 10 pounds on the rotor would be similar, not enough load to generate significant heat or wear. But what do I know? |
Yes, 1.75s up front, and 1.38s out back. That's a good point, about the constant drag, I never considered it and assumed that a mere two pounds would just serve to eliminate any so-called "slack" in the system. But come to think of it, pads are always right there kind of scraping on the discs anyway, so I s'pose I never encountered a situation where drain-back to the reservoir was an issue.
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My name's Steve and it's pronounced "Bust 'em" (cuz people think I'm Tom) 😏 |
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oprn
Samba Member
Joined: November 13, 2016
Posts: 12753
Location: Western Canada
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| Posted: Mon Mar 11, 2024 2:42 am Post subject: Re: Brakes |
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I could use just one RPV on the front by plugging one hole on the master cylinder and adding a tee after the RPV on the other line. Yes it does appear that the EMPI RPV would do the job on it's own without adaptors. Thanks!
From just visual observation only one of the rear caliper pistons is retracting. I am wondering if there is a chance the new piston seal rolled over when I pushed the piston in. I am going to take it apart today and see if all is well in there.
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