M-53 carburator on a '62 ?

Linkert related issues
Cotten
Posts: 6913
Joined: Mon Aug 26, 2002 9:09 am
Location: Central Illinois
Has thanked: 100 times
Been thanked: 281 times

Re: M-53 carburator on a '62 ?

#16

Post by Cotten » Wed Mar 26, 2014 11:27 am

Agreed, Kitabel,..

But you are looking at it from a high-performance perspective, peak power at WFO.
There are applications where the low end spectrum is used much more, if not most of the time.
In particular, sidecar duty.

The usual competitive advantages of high compression and high air-flow become a detriment.
Higher combustion temperatures, and the need to "get up on the cam" for a peaky performance curve just shortens the fuse on the bomb.

....Cotten



58flh
Posts: 3337
Joined: Sat Jun 26, 2010 1:54 pm
Bikes: 1958flh 1969sporty,had a knuckle but sold back to original owner
Location: NEW JERSEY
Has thanked: 195 times
Been thanked: 264 times

Re: M-53 carburator on a '62 ?

#17

Post by 58flh » Wed Mar 26, 2014 12:41 pm

Cotton--looks like they would make great atomizers!/but at the cost of constriction of airflow--Then again In a WFO- situation 1-of those thimbles cut-down may help?-I cant call it without a stopwatch, but anyway it be a waste to wreck the silver one!---RICHIE 8)

Cotten
Posts: 6913
Joined: Mon Aug 26, 2002 9:09 am
Location: Central Illinois
Has thanked: 100 times
Been thanked: 281 times

Re: M-53 carburator on a '62 ?

#18

Post by Cotten » Wed Mar 26, 2014 3:36 pm

Richie!

Once again, if you are judging performance with a stopwatch, or "beating the clock", then you are tuning a delicate racing thoroughbred.
Pulling a loaded hack requires a draft horse.

Please consider why Servicars used very tiny carburetors.

....Cotten
PS: The silver would not be my first choice, not only because it would be a sin against History, but because it would probably melt with my stronger silver solders: We don't want to lose it into the motor either!
Here's one of my previous botched attempts at a "hybrid", with the "booster far too forward:
HYBRDVNT.jpg
You do not have the required permissions to view the files attached to this post.

panhead_kicker
Posts: 936
Joined: Fri Oct 03, 2008 2:57 am
Bikes: Pan
FLHP Evo
E-H Super X
Chubble head hack
Servi-car
Topper(s)
Model 64D (Hey its got 3 wheels!)
Location: Indianapolis
Has thanked: 89 times
Been thanked: 68 times

Re: M-53 carburator on a '62 ?

#19

Post by panhead_kicker » Thu Mar 27, 2014 2:44 am

Same concept?
You do not have the required permissions to view the files attached to this post.

Cotten
Posts: 6913
Joined: Mon Aug 26, 2002 9:09 am
Location: Central Illinois
Has thanked: 100 times
Been thanked: 281 times

Re: M-53 carburator on a '62 ?

#20

Post by Cotten » Thu Mar 27, 2014 3:05 am

I don't know diddly about Tillys, P_K!

But it looks like the booster missed the main nozzle as badly as mine.

....Cotten

Huck
Posts: 636
Joined: Tue Mar 15, 2011 5:35 pm
Bikes: 58 hd
91 hd
09 custom
Location: Wake Forest NC
Has thanked: 15 times
Been thanked: 33 times

Re: M-53 carburator on a '62 ?

#21

Post by Huck » Thu Mar 27, 2014 3:08 am

And then the breeze hits the wall at the back of the intake manifold.
I’ve seen a couple old manifolds with home made breeze splitter, a wedge made into the back of the manifold. Anyone worked with this before?

panhead_kicker
Posts: 936
Joined: Fri Oct 03, 2008 2:57 am
Bikes: Pan
FLHP Evo
E-H Super X
Chubble head hack
Servi-car
Topper(s)
Model 64D (Hey its got 3 wheels!)
Location: Indianapolis
Has thanked: 89 times
Been thanked: 68 times

Re: M-53 carburator on a '62 ?

#22

Post by panhead_kicker » Thu Mar 27, 2014 3:53 am

Cotten wrote:I don't know diddly about Tillys, P_K!

But it looks like the booster missed the main nozzle as badly as mine.

....Cotten
Actually, the nubin at the forefront is solid. The main nozzle which is difficult to see in the picture, appears to be centered in the bottom of the "booster"

kitabel
Posts: 1015
Joined: Tue Aug 03, 2010 7:10 pm
Bikes: 2008 96" Fat Boy TC
Location: Lynbrook, New York
Been thanked: 135 times
Contact:

Re: M-53 carburator on a '62 ?

#23

Post by kitabel » Thu Mar 27, 2014 5:40 am

A divider in the back wall is what the factory tried several times before giving up - one of those ideas that looks "right", but it doesn't work.
They went to the "T" in 1940.

I suspect the low booster position in the HD carb is to align part throttle flow with the opening edge of the throttle disc, which (unlike the Model M) opens vertically (horizontal shaft).

Cotten
Posts: 6913
Joined: Mon Aug 26, 2002 9:09 am
Location: Central Illinois
Has thanked: 100 times
Been thanked: 281 times

Re: M-53 carburator on a '62 ?

#24

Post by Cotten » Thu Mar 27, 2014 12:13 pm

Huck!

I've played with a couple of manifolds with a "septum",
COBBMANI.jpg
...And although they can look pretty sexy, Kitabel is right.

I read somewhere that a "plenum" effect is best.

.....Cotten
You do not have the required permissions to view the files attached to this post.

58flh
Posts: 3337
Joined: Sat Jun 26, 2010 1:54 pm
Bikes: 1958flh 1969sporty,had a knuckle but sold back to original owner
Location: NEW JERSEY
Has thanked: 195 times
Been thanked: 264 times

Re: M-53 carburator on a '62 ?

#25

Post by 58flh » Thu Mar 27, 2014 12:42 pm

COTTON--On the T set-up a PLENUM is the olny way to go! as a Single plane or-(splitrunner)-would be a hinder towards performance,--Your better off using 2-runners & 2-carbs.--Olny then you can really have control over adj. both low-end & WFO.---JMO---Respectfuly---RICHIE

Post Reply

Return to “Linkert”