Author Topic: 1968 Fastback 427 Stroker  (Read 4438 times)

0 Members and 1 Guest are viewing this topic.

Tunnelwedge

  • Sr. Member
  • ****
  • Posts: 266
    • View Profile
Re: 1968 Fastback 427 Stroker
« Reply #30 on: March 25, 2024, 05:02:07 PM »
Took the heads off.


Tunnelwedge

  • Sr. Member
  • ****
  • Posts: 266
    • View Profile
Re: 1968 Fastback 427 Stroker
« Reply #31 on: March 29, 2024, 03:39:31 AM »
When I built the heads I used a valve seal that I thought was good.
I think I selected the wrong seal.
I was getting some oil into the chamber and I know it was not the intake gasket
so I just kept driving until the rocker shaft broke.
What I think what was happening was the oil was filling up the head and the seal was sitting
in an oil bath. The engine runs for long periods at 3000 rpm and the oil drain back may be a tad slow.
I think the oil is wicking up the ridges of the valve guide between the steel cap of the seal.
I'm going to change the seal to a cup that is rubber viton so that it seals better at the ridges.




Tunnelwedge

  • Sr. Member
  • ****
  • Posts: 266
    • View Profile
Re: 1968 Fastback 427 Stroker
« Reply #32 on: April 03, 2024, 04:46:22 PM »
The weather is getting better. Can work in the driveway. :)
I filled the driver head exhaust ports with a danger liquid.
They don't leak. I did not test the pass side. I have the valves out now.
I power washed the Tunnel Wedge. This is a Ford TW.
A while ago I lost the screws for it and made a set and then found them a couple of years ago. Pretty close.
I'm not sure about new Tunnel Wedges, but this one has a large T Stat hole.
I machined a C8 housing to fit it. I used the really crappy looking one. It looks more real. lol
These used to be kind of rare. Today they are in stock at Summit and BBM. ;D









« Last Edit: April 03, 2024, 04:50:22 PM by Tunnelwedge »

Tunnelwedge

  • Sr. Member
  • ****
  • Posts: 266
    • View Profile
Re: 1968 Fastback 427 Stroker
« Reply #33 on: April 10, 2024, 08:09:50 AM »
Took the oil pump off.
Looks ok to me. It's a Melling M-57HV with a shim.
I'm putting a temp gauge and oil cooler in and will check some oil temps.



« Last Edit: April 10, 2024, 02:06:19 PM by Tunnelwedge »

Tunnelwedge

  • Sr. Member
  • ****
  • Posts: 266
    • View Profile
Re: 1968 Fastback 427 Stroker
« Reply #34 on: April 11, 2024, 05:54:03 PM »
I measured some things.
Pump shaft hole 0.4951
Pump gear shaft 0.4930
Driven gear outside 2.623
Pump body bore 2.629
Pump body bore depth 1.1135
Drive gear 1.100
Driven gear 1.100
I don't have a drawing to compare to, but standard machining clearances are close to these specs.
I'm not seeing any serious wear. I'm comfortable reusing it.


Tunnelwedge

  • Sr. Member
  • ****
  • Posts: 266
    • View Profile
Re: 1968 Fastback 427 Stroker
« Reply #35 on: April 12, 2024, 07:14:09 AM »
Under advice I did some more inspection.
The book shows that a 427 Mustang needs a rotor assembly end clearance
of 0.0011-0.0041. Looks like I'm good. :)