Richard,
I found that with the smog kit removed I had to advance the timing
significantly although I do not recall the degrees.
Also beware of excess crankcase pressure in these little 1500s. I had the
dipstick leaking horrably at higher RPMs. I vented through the fuel pump
blanking plate to a tee to the valve cover where it met the air cleaner.
I used a Weber 32/36 and maniforld with great success from Pierce Manifolds.
Hope that helps.
Tracy
---- Richard Ball <richb@u.washington.edu> wrote:
> I've got a couple 1500 tuning questions but first some background so you know
> what I'm working with.
>
> The car is a '76 Midget running the stock 1500 and Zenith Stromberg carburetor
> with the exception that the previous owner had striped off all the smog
> control equipment. The PO had also installed a Lumanition electronic ignition
> system that mounts in the stock distributor. I would assume this was to
> replace a failed Lucas OPUS system that the car came with. I have completely
> rebuilt the carb and the water choke. Resurfaced the choke to carb mounting
> face to remove some cupping, and replaced the O-ring that seals the needle
> holder to the bottom of the dash pot. It has new plugs, but I have not
> replaced the cap, rotor, or wires yet. They looked unused. It runs
> surprisingly well for a car that has sat as long as it did, but there are two
> tuning issues I would like to address.
>
> Timing
> When I set the timing to the factory spec of 2 ATDC the engine ran extremely
> hot. Bill M suggested that this might be due to the smog equipment having
> been removed. I now have it set to the non-emissions UK market spec of 10
> BTDC and it runs better and much cooler. So here's the question. Is this
> where I should leave it or does someone have experience with another setting
> they would like to share?
>
> Carburetor
> The car seems to hesitate at higher RPM's which would lead me to believe that
> it's running lean. I thought I was pretty carful when I set the float level,
> but I may have set it off. If I have it set right and am running still
> running lean how much should I raise the float level from the normal setting
> to correct for this. This carb is a PITA to fit and remove, so I'd rather not
> go with trial and error if I can help it.
>
> Any suggestion?
>
> Rich Ball
> '76 Midget
> Everett, WA
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