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Old 07-09-2020, 11:07 AM   #21
Bored&Stroked
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Default 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???
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Old 07-09-2020, 03:32 PM   #22
Phil Gillespie
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Default 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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Old 07-09-2020, 03:59 PM   #23
Lawrie
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Default 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
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Old 07-09-2020, 04:45 PM   #24
Phil Gillespie
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Default Re: 69a Block Oil Gallery Crack. Centre bearing

Quote:
Originally Posted by Lawrie View Post
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
This set up came with a 12v set up, ie high torque starter motor and the single wire genr etc. So changed car to 12 v.
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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