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geeze
Samba Member
Joined: July 30, 2025
Posts: 30
Location: land before time
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 Posted: Mon Aug 04, 2025 3:52 pm Post subject: Re: 2074 bus engine (re)build |
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| 94touring wrote: |
These are the stage 1 that I use.
https://aapistons.com/collections/cylinder-heads-c...-s1-ported
Brian got these figures, I'll post his findings in comparison to panchitos, which need to have corrected bowls or they choke. CFM ratings for panchitos I got off the head chart floating around the forum.
Brother’s round port.
263.1 ft/sec velocity
66.6cc port volume
CFM @ .5 lift 164.2
Panchito w/ blended bowls
271.0 ft/sec velocity
64cc port volume
Cnc chamber CFM @ .5 lift 167
As cast @ .5 155 |
thank you ! did you also use their service to cc the heads ?
decided based on the feedback here to go with the 94s and picked thsm up sunday  |
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94touring
Samba Member
Joined: October 24, 2020
Posts: 523
Location: Tulsa - OK
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| Posted: Mon Aug 04, 2025 3:58 pm Post subject: Re: 2074 bus engine (re)build |
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| I needed 60cc on the chamber volume. I can't remember if I emailed and asked what they were or if I needed to pay for additional work. I'd grab the port matched manifolds too. |
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daveblank
Samba Member
Joined: November 07, 2024
Posts: 160
Location: Dallas, TX
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| Posted: Mon Aug 04, 2025 8:27 pm Post subject: Re: 2074 bus engine (re)build |
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| geeze wrote: |
| daveblank wrote: |
| geeze wrote: |
thank you for the head recommendations, will talk to them and see what my options are
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Brothers website says 1 week on most of their heads, I don't know if it's true or not. I spoke with Greg Tims yesterday & he told me 8-10 weeks on mine. Hope this helps. |
that does thank you ! was having trouble find details for the brothers heads
are they these ones ?
https://aapistons.com/collections/performance-and-...alves-pair |
Here they are. http://www.brothersvwmachineshop.com/heads.htm |
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geeze
Samba Member
Joined: July 30, 2025
Posts: 30
Location: land before time
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| Posted: Fri Aug 08, 2025 9:41 am Post subject: Re: 2074 bus engine (re)build |
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thank you ! my google foo was failing me  |
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daveblank
Samba Member
Joined: November 07, 2024
Posts: 160
Location: Dallas, TX
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| Posted: Sun Aug 10, 2025 6:27 pm Post subject: Re: 2074 bus engine (re)build |
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| geeze wrote: |
thank you ! my google foo was failing me |
For some reason I can never find their website on a Google search. |
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