[Spridgets] Rear brake upgrade

[James Lempe]

Hello all,

I just upgraded my front brakes to disc.  Now I'm thinking about
upgrading the rear brakes.  I have a donor car (67) with all the parts
available.  Now much should I replace.  From the shoes to the entire rear
end???

Thanks, Jim Lempe, Homer AK
AN5L26749
 A penny saved is a government
oversite! 




________________________________
From:
"WeslakeMonza1330 at aol.com" <WeslakeMonza1330 at aol.com>
To:
spridgets at autox.team.net
Sent: Tue, April 27, 2010 11:08:38 AM
Subject: Re:
[Spridgets] DCOE 40 or DCOE 45?

In a message dated 27/04/2010 20:03:38 GMT
Daylight Time,  
WeslakeMonza1330 at aol.com writes:

Hi John,

Jetting data from
dyno testing on its way to you 'For Your Eyes Only'  (I'm 
ex military!).

I'm
not certain if some UK A-series racers use a 48 DCO (48 DCOE is  
obsolete)
with 42mm chokes.  If you can find a 48 DCOE it can be choked  down to 
40mm.
One very respected UK racer had done some machining work so he could get 
42mm chokes into a DCOE 45.

What I don't see much of is the use of Full
Radius rams which make a big  
difference on how the DOCE pulls from low rpm. 
I also don't see many CV  
exhaust systems on road cars.

I drive slower than
I used to.  The current engine is particularly  strong 
from 5000 to 5500 rpm
which on 3.9 diff and a five speed is 100 - to  about 
112mph.  If I'm driving
at 4000rpm which is about 80mph in 5th and  need to 
change to the outside
lane to over take I EXPECT to accelerate to  4,500 rpm 
and 90mph pretty much
straightaway and without changing down to  4th.

The engine will pull smoothly
from about 2000 rpm in 4th (on a 3.9 diff)  
even if the throttle is floored
and I think I showed Frank this when he was 
in  the UK though it may have
been slightly higher rpm (2300?) as that engine 
was  near the end of its life
(though managed to haul the car to 105mph+ 
the week  before I pulled it to
fit the new engine).

With a controlled vortex manifold from Janspeed and Full
Radius rams on  
any Spridget with a DCOE, and especially a street car you'd
soon be on the  
phone ordering some bigger rams as the engine would pull like
a train but feel 
asthmatic going through 6000rpm.

In early days of ownership
my Sprite had a 4.5 diff and a 4 speed so  
110mph was 7,500rpm and seen on a
regular basis on weekends.  I was much  younger 
then.

Regards

Weslake-Monza
1330

In a message dated 27/04/2010 19:43:34 GMT Daylight Time, 
fastvee at yahoo.com writes:

I know that different size choke tubes can be made
to  work in the same 
carb body with different jetting combinations, but  many
1275 race engines use 
smaller venturis than that, so I am  surprised. Our
definition of road going 
must be vastly different, and  your choice would not
be the best choice for 
my street driving. I  drive fast, but for me road
going means 2000-5000 
rpm, with much more  time under 4500 than above it, and
where mixture quality 
and smooth  transition from idling to the main circuit
trumps the last bit of 
airflow any day. I would be interested to see your
dyno  sheets.
John
Fogelsville,  PA
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