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Old 04-13-2018, 07:32 PM   #21
Flathead
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Default Re: How much better is a B block than an A?

Does anybody know the status of Tod's new blocks?
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Old 04-13-2018, 07:43 PM   #22
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Default Re: How much better is a B block than an A?

One detail about making new blocks, the audience of customers is very small, especially since the blocks cannot be used in Vintage racing.

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Old 04-13-2018, 11:39 PM   #23
Chris Haynes
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Default Re: How much better is a B block than an A?

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Originally Posted by johnneilson View Post
One detail about making new blocks, the audience of customers is very small, especially since the blocks cannot be used in Vintage racing.

John
Not everybody is a racer.
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Old 04-14-2018, 02:06 PM   #24
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Default Re: How much better is a B block than an A?

A three main A block set up to take a B crank with the bigger main bearing diameter would be a winner for me. The ultimate foundation for a rugged touring motor. Pressure to the mains would be nice but original A system would be OK. Just sayin'
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Old 04-14-2018, 03:03 PM   #25
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Default Re: How much better is a B block than an A?

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A three main A block set up to take a B crank with the bigger main bearing diameter would be a winner for me. The ultimate foundation for a rugged touring motor. Pressure to the mains would be nice but original A system would be OK. Just sayin'


For those here who may not be aware, YOU have just described the current projects being under-taken by TOD, a member here.


When you say...'ultimate' is 3 main B bottom , A block, that is not accurate tho.
Tod is making the A looking block with FIVE mains and that is the ultimate , IMV !


For those who care, and/or paying attn. to this type subject, Tod has already made a stock running Model A block (utube(?).
He has also made two experiment aluminum blocks modeled after the things that you want. First is an alum three main blk and the second is a five main alum version. Both are currently being worked.
At the same time, 5 main cast iron blk (tooling) being worked on.
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Old 04-14-2018, 05:51 PM   #26
Chuck Sea/Tac
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Default Re: How much better is a B block than an A?

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Inserts are definitely better if you are running a high compression head. Babbitt was designed when engines had 4 to 1 compression.
Diesel requires more compression than gas, I’m pretty sure they used Babbitt as there was nothing else. By the way, the first compression fired engine was before 1900. I understand the concept your saying, but “Good” Babbitt will handle 7:1 and easily 6.1 what wipes out Babbitt is lugging under load and advanced timing.
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Old 04-15-2018, 12:14 PM   #27
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Default Re: How much better is a B block than an A?

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Not everybody is a racer.
Chris, exactly my point.

The market for an improved "B" block would be very limited by the fact that Vintage racing does not allow for aftermarket blocks. BTW, that market would benefit most as the output easily triples (and more) the original design power levels. Donovan I understand has sold the last one known as the "D" block. I do understand that there are a few around that can be bought, you have to look, and bring a stack of bills.

The "perceived" notions that "B" blocks are inferior to "A" blocks is IMHO an old wives tale. Sure, every production motor design/production can have flaws or weaknesses when power levels start to rise above design. This applies to lawnmower motors up to big diesel motors.

Babbitt bearing design goes back to the railroads, very large and heavy applications. Designed properly, alloyed, installed and lubricated properly it is very forgiving and will withstand much abuse. There is a well known person around here who ran a babbitt rotating assy in a "B" motor, OHV and Turbocharged on methanol at Bonneville. It is reputed to be his preparation for the races to just dust off the motor after removing it from storage and install into car.


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Old 04-15-2018, 02:33 PM   #28
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Default Re: How much better is a B block than an A?

Here's the video of Tod's new engine. https://www.youtube.com/watch?v=dhVs0brJukQ

Bob
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Old 04-15-2018, 04:09 PM   #29
Chris Haynes
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Default Re: How much better is a B block than an A?

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Here's the video of Tod's new engine. https://www.youtube.com/watch?v=dhVs0brJukQ

Bob
I'd like to see it on a dyno.
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Old 04-15-2018, 05:57 PM   #30
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Default Re: How much better is a B block than an A?

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Here's the video of Tod's new engine. https://www.youtube.com/watch?v=dhVs0brJukQ

Bob
Hey Bob,
Thanks, I don't know how to do this type procedure / reference .
Since that engine was made from a NEW A block and from USED spare model A parts, I'm thinking that it would/should make about 20 HP +/-, like Fords original ?
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Old 04-18-2018, 09:48 AM   #31
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Default How much better is a B block than an A?

OK, a little more info requested...


I went back to snap a shot of the engine number stamping yesterday, but the pad on the side of the block was blank. I have since learned that, on B engines, this pad is blank and the B number is on the flywheel housing. My problem there is...I don't have the housing!




Now mind you, the oil pan stops at the rear main cap and has a knife-edge (not a rolled lip) that creates the seal. Pulling the pan, the crank is definitely counterweighted and the cam has a fuel pump lobe. I don't remember seeing a fuel pump boss or port through the side of the block.






Could this be a service replacement "A" block that came from Ford with a counterweighted crank and B cam? If so, would the crank be turned down to fit the A block, or would the block have larger journal bores? (Like a dummy, I didn't have my calipers to measure the rod journals!!)


Any ideas???



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