The Ford Barn

3W Hank · 09-17-2024, 05:40 PM

This might sounds Very odd, but for a start ; I has bought a 1941 ported race block and its .+0.125” or 3.3125” bore now and I had this upp here before and no one belived it was sonic tested to a hair averege over 0.25” wall ( by seller in USA ) Se picture before topics.
Block is still at US shipper but will leave LA soon.
Anyway, I has a idea on my 5W coupe to be a pre 1950 LA street racer.
I’m not found on the 8AB stuff at all,
I’m not pre-war but after war and before 1949.
We has all our strange illness..
I has leaved my Scintilla to a Kurten distributor and most parts both Henry or Lincoln and speedparts is actually before 1949.
I do has a new grinded Merc 4” crank with bearings and rods, but I got a bad eye on it.
I’m limited to a cubic under 300 and I know stroke is not gain as much as cyl bore, plus stroker cranks pressure cyl wall harder.
As a engine guy I’m aware of nothing beats cubics inches.
But I talked to a guy here and he said ’back in the days’ those blocks and std later 59 was bored more than 1/8” over std.
My block had not see water for 50 years or more.
On wall thickness I can’t say but its a sonic test.
I can re-test but one never know of a pin hair.
So lets say I don’t go 3.375” but stick at 3.32”.

On cam I has a Potvin 425 and dual LZ carbs, aluminium flywheel and 4.44 rear.
No burnouts ( drags ) but I like rew on gears.
I’m not focus on get as much cubic as possible here but more ’what’ did the guys do in 47/48 ?

I had a 1938 crank ( 3.75 ) I guess its a 2” rod and but the smaller main diameter.
But the std 1941 crank might has the same main as the later 59AB.

So my question is, how did the guys do before the 4” Merc crank came out ?
What was the trick crank shops sold them ? ( based out from what crank/year )
-I love the history.

( Some say, forgett about this nonses and get a new ( Taiwan ) 4.25 crank.
No, I like to do it the complicated ( and odd ) and maybe the expenive way.

If anyone has old race crank that fit this, call me.

Ideas ?

09-17-2024, 05:40 PM	#1
3W Hank Senior Member Join Date: Feb 2022 Posts: 578	Old FH race cranks ( before the 8BA ) This might sounds Very odd, but for a start ; I has bought a 1941 ported race block and its .+0.125” or 3.3125” bore now and I had this upp here before and no one belived it was sonic tested to a hair averege over 0.25” wall ( by seller in USA ) Se picture before topics. Block is still at US shipper but will leave LA soon. Anyway, I has a idea on my 5W coupe to be a pre 1950 LA street racer. I’m not found on the 8AB stuff at all, I’m not pre-war but after war and before 1949. We has all our strange illness.. I has leaved my Scintilla to a Kurten distributor and most parts both Henry or Lincoln and speedparts is actually before 1949. I do has a new grinded Merc 4” crank with bearings and rods, but I got a bad eye on it. I’m limited to a cubic under 300 and I know stroke is not gain as much as cyl bore, plus stroker cranks pressure cyl wall harder. As a engine guy I’m aware of nothing beats cubics inches. But I talked to a guy here and he said ’back in the days’ those blocks and std later 59 was bored more than 1/8” over std. My block had not see water for 50 years or more. On wall thickness I can’t say but its a sonic test. I can re-test but one never know of a pin hair. So lets say I don’t go 3.375” but stick at 3.32”. On cam I has a Potvin 425 and dual LZ carbs, aluminium flywheel and 4.44 rear. No burnouts ( drags ) but I like rew on gears. I’m not focus on get as much cubic as possible here but more ’what’ did the guys do in 47/48 ? I had a 1938 crank ( 3.75 ) I guess its a 2” rod and but the smaller main diameter. But the std 1941 crank might has the same main as the later 59AB. So my question is, how did the guys do before the 4” Merc crank came out ? What was the trick crank shops sold them ? ( based out from what crank/year ) -I love the history. ( Some say, forgett about this nonses and get a new ( Taiwan ) 4.25 crank. No, I like to do it the complicated ( and odd ) and maybe the expenive way. If anyone has old race crank that fit this, call me. Ideas ? Last edited by 3W Hank; 09-18-2024 at 03:38 AM.