[Healeys] Carburator needle changes

[Dan Stromquist]

All:
Finding the $100 meter is the least of your problems.  According to the
article there are 354 possible .090 needles that might be correct (or close
enough) for the BJ8 HD8 carbs.  Who carries this kind of inventory?  First,
you must make a correct determination of what needles you have in your carbs
and hook up and read the O2 meter readings and use the DOS program to figure
out what to change to. Order new needles, then due it all over again until
you get closer.  Then don't change your exhaust system, air filters, etc,
etc.
Dan


-----Original Message-----
From: healeys-bounces+dan=warner-associates.com at autox.team.net
[mailto:healeys-bounces+dan=warner-associates.com at autox.team.net] On Behalf
Of Jerry Costanzo
Sent: Monday, October 06, 2008 4:54 PM
To: healeys at Autox.Team.Net
Subject: Re: [Healeys] Carburator needle changes

Ken Freeze put his car on a dyno and tested.  I think that is the best way, 
but it is nice to get close first.  I would love to have a fuel-air meter. 
Anyone want to donate?

Jerry


> Jerry,
>
> Jerry,
>
> One approach I'm wondering about is to use a fuel-air meter and oxygen 
> sensor(s) in the exhaust pipe(s).  See 
> http://www.team.net/www/morgan/tech/carbs/tuning.html
>
> Anyone done this on their Healey?
>
> Bob
>
> Jerry Costanzo wrote:
>> I have installed my HD8 carburetors onto a slightly modified BJ8 engine. 
>> The
>> carburetors were rebuilt (by me).  At present, the engine runs well but 
>> the
>> carburetors have a little backfire when cold and occasionally when warm. 
>> They
>> test by lifting the piston to be too lean.  If I adjust the fuel mixture 
>> any
>> richer, the idle goes over 1100rpms and I still don't get the lift test 
>> to
>> properly keep the rpms steady.
>> Other items of note:
>>
>> Checked for vacume leaks.  Did not find any with a unlit propane torch.
>> Timing appears to be correct.  I went back and checked the valve 
>> positions vs.
>> cylinders at top.
>> Engine revs ok,  I have not driven the car to test the power.  It does 
>> not
>> have body panels on yet.
>>
>> Is it time to try a richer needle in the carburetor?   If so, which would

>> you
>> try?
>>
>> Jerry
>> BJ8  in progress
>> BN4
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