[Diy_efi] Re: Was 1.3l TBI project, now ITB

[Don Sauman]

John

You could use a drag strip but where I am there is only one and my 
chances of access are close to zilch.

We used to find a steep hill and time the climb to top. It helps if it 
has a road :-). Another adjustment and do the climb again. For a street 
vehicle it meant that you didn't incur the wrath of the law. That or a dyno.

Cheers
Don

John Smith wrote:

>
> Carbs really are not hard to tune at all, easier than EFI even. The 
> trouble comes from trying to tune one without a dyno and wideband O2. 
> In the pre-efi days, tuning was done by making runs at the drag strip. 
> You jet the carb rich and then lean it out until the sparkplugs have 
> tan deposits on them.
> If you know what the problem is and what fuel circuit in the carb is 
> responsible, it's easy to fix. Just in case anyone is wondering, a 
> good carburetor will hold its settings indefinitely; they do not 
> simply go "out of tune" by themselves.
>
> Oh yeah, I found an opto interrupter from a photocopier to use as my 
> crank trigger for the 555 EFI. I might even go whole-hog with the 10hp 
> Briggs and fab up a pressurized oil system. From what I understand, 
> high rpm and high power will make a stock Briggs rod go south in a 
> hurry since the slinger oiling is adequate at best.
>

-- 
Don Sauman
35 Asteroid Way
Carlisle 6101
Western Australia

P: 08 9361 0337
F: 08 9361 0581
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