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07-09-2020, 11:07 AM | #21 |
Senior Member
Join Date: Jan 2011
Location: Central Ohio
Posts: 5,009
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Re: 69a Block Oil Gallery Crack. Centre bearing
Hey Phil: I've been curious about that manifold - looks like it is a more modern design for the standard Holley square bore base. This would seem to be a better setup than using an older 4-barrel design from the 50's that is not really setup for our modern carbs. I'd love to see what the manifold plenum area looks like - if you happen to have the manifold, could you take some pictures of the top-plate on the manifold as well as with the plate removed so we can see the plenum area. Would love it if it was a good dual-plane design with the correct port mappings (given the firing order of the flathead). Take care and good luck with your "new" engine!
Your engine should run really well . . . but I'd sure put a bit more CAM into it! LOL I know, you'll have more torque off a stop and more lower-end power, but I can't help myself with putting cams into these engines. Maybe a 1007B??? |
07-09-2020, 03:32 PM | #22 |
Senior Member
Join Date: Sep 2011
Location: Christchurch New Zealand
Posts: 1,603
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Re: 69a Block Oil Gallery Crack. Centre bearing
https://www.speedwaymotors.com/shop/...-1-12-313-5536.
Its a Speedway Single Plane inlet manifold as for 48 to 53 Flathead. This manifold does not allow use of mech fuel pump, electric one required. Presently have manifold set up on bench for fitting up of single wire genr and cooling fan as mounted below genr. Cam well its for street use and yes more torque off stop and more low end power. Phil NZ |
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07-09-2020, 03:59 PM | #23 |
Senior Member
Join Date: May 2010
Location: Qld, Australia
Posts: 4,195
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Re: 69a Block Oil Gallery Crack. Centre bearing
Phil , have you worked out the comp ratio,
on the 276 eng I have on the stand with 66cc heads, 8.4 -1, cranking psi is around 165 -170. Starts OK on 6v Lawrie |
07-09-2020, 04:45 PM | #24 | |
Senior Member
Join Date: Sep 2011
Location: Christchurch New Zealand
Posts: 1,603
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Re: 69a Block Oil Gallery Crack. Centre bearing
Quote:
That cranking psi is similar to a friend of mine who has a similar set up as i have, his is an H & H build. Phil NZ |
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