|
Sponsored Links (Register now to hide all advertisements) |
|
|
Thread Tools | Display Modes |
05-17-2020, 09:56 AM | #1 |
Member
Join Date: Feb 2015
Location: San Bernardino
Posts: 50
|
crab distributor on a 38 24 stud
is there an adaptor from 2 hole to 3 hole ditributor? I want to use the crab style on a 38ish 24 stud. I really dont want to pull the crank pulley and front cover unless that is the only way. what do you know? thanks for any ideas
|
05-17-2020, 10:18 AM | #2 |
Senior Member
Join Date: May 2010
Location: Beaver Dam, Wisconsin
Posts: 821
|
Re: crab distributor on a 38 24 stud
|
Sponsored Links (Register now to hide all advertisements) |
|
05-17-2020, 10:25 AM | #3 |
Senior Member
Join Date: May 2010
Location: Wisconsin, USA
Posts: 9,001
|
Re: crab distributor on a 38 24 stud
I feel the need to ask: "Why do you want to go the crab style?"
__________________
"I can explain it for you. However, I can't understand it for you". |
05-17-2020, 12:48 PM | #4 |
Member
Join Date: Feb 2015
Location: San Bernardino
Posts: 50
|
Re: crab distributor on a 38 24 stud
I changed to the 2 bolt cover this morning. but alas the snot on the camshaft is too long and the crab distributor won mount. looks like i would need something like a 7/16"spacer for it to work.
|
05-17-2020, 12:51 PM | #5 | |
Senior Member
Join Date: May 2010
Location: Wisconsin, USA
Posts: 9,001
|
Re: crab distributor on a 38 24 stud
Quote:
I'd still like to know why you feel the desire to swap the original dizzy for the crab type.
__________________
"I can explain it for you. However, I can't understand it for you". |
|
05-17-2020, 03:34 PM | #6 |
Senior Member
Join Date: May 2010
Location: Solihull, England.
Posts: 8,750
|
Re: crab distributor on a 38 24 stud
Sponsored Links (Register now to hide all advertisements)
https://www.speedwaymotors.com/Flath...cer,25074.html Mart. |
05-17-2020, 11:13 PM | #7 |
Senior Member
Join Date: Aug 2010
Location: McMinnville, TN
Posts: 2,327
|
Re: crab distributor on a 38 24 stud
Im with Kube. The three bolt 11a helmet distributor has the exact same advance curve as the 21a crab and performs the exact same and in my opinion given the distance between the bushings and the fact the rotor is in the middle of the shaft rather than attached to the end, I much prefer the helmet distributor as the bushings last longer in them over the crab.
But I can understand plug wire changes are much easier on a crab type as well as the cap and rotor. |
05-18-2020, 08:09 AM | #8 | |
Senior Member
Join Date: May 2010
Location: Wisconsin, USA
Posts: 9,001
|
Re: crab distributor on a 38 24 stud
Quote:
Yep, easier to change the cap and wires for certain. Still, just how often are they necessary to change? Of course, having no response from the OP doesn't help us better understand what he (or she) is envisioning with this proposed swap.
__________________
"I can explain it for you. However, I can't understand it for you". |
|
05-18-2020, 10:44 AM | #9 |
Senior Member
Join Date: Jan 2011
Location: sw minnesota
Posts: 4,573
|
Re: crab distributor on a 38 24 stud
if its going in an Av8, the crab is shorter. no room to spare in those contraptions.
|
05-18-2020, 11:28 AM | #10 |
Senior Member
Join Date: May 2010
Posts: 500
|
Re: crab distributor on a 38 24 stud
I found the crab, with external coil, easier to diagnose. The old saying, if it doesn't fire, it's usually spark or fuel. It is easy to take off the air filter to see if fuel is coming out using the accelerator pump. If there is no blue spark at the plugs, see if there is blue spark at the output of the coil. If so the problem is in the distributor mechanical rotor system; if not it is in the electrical system and it is a lot easier to change out the coil to see if the spark improves. Also, (and I say this in partial jest) since Henry went to this system, it must have been better to someone other than a restorer.
|
05-18-2020, 12:58 PM | #11 |
Senior Member
Join Date: May 2010
Location: Jacksonville FL
Posts: 1,137
|
Re: crab distributor on a 38 24 stud
Juergen,
Just because the design was changed does not mean it would create a "better" distributor. There were considerations other than performance and service. A helmet uses twice as much aluminum as a crab. Aluminum production at the begining of WW2 was nothing compared to war production needs ... by war end the story was different. Do your own calculations and figure out how many P-51's could be built from the aluminum saved. (I could be wrong ... and didn't they make some crabs out of cast iron to save on aluminum?)
__________________
"Remember that when it comes to intelligence, half of all of us are below average." |
05-18-2020, 01:20 PM | #12 |
Senior Member
Join Date: Jul 2019
Location: Southern Oregon
Posts: 782
|
Re: crab distributor on a 38 24 stud
I would agree, knowing how Henry thought, that the Crab was at least 50% cost reduction but, I like them for 4 reasons. Looks (I grew up looking at them on all kinds of race engines), remote coil and they are easier to work on are 3. After market cams are another reason to use one.
I bought one and the aluminum gear, to put on my '36/'37, 21 stud stud engine, to use with the 59 style cam.
__________________
Frank '35 Ford Model 51 '48 Ford F3 '54 Ford Tudor Mainline Last edited by frnkeore; 05-18-2020 at 01:25 PM. |
|
|
Sponsored Links (Register now to hide all advertisements) |
|