I have mostly completed the tuning of the 45COE Weber on my Bugeye. I have a
stock 1275 lower end, an aluminum head, a 266 cam, Isky valve springs, a LCB
header, 1-3/4 pipe to a Cherry bomb 22" long. I started with 34 chokes, 3.5
aux venturis, F2 emulsion tubes, 50F9 idle jets 50 pump jets 155 main jets and
170 air jets. After I found and repaired the cracked fuel line near the tank,
we were ready to work on the Weber. I drove up to Russ's house at 9:00 AM on a
beautiful fall day. Russ races a GT4 Toyota and uses Webers on his race car,
so he has some understanding of them. I used some settings I got from Rick,
who has a similar engine and settings from listers on this net. We set the
float levels at 4.5 and 15 mm with some tools Russ had made. they were pretty
far off. We set the timing, and the idle screws and we were ready to start. We
changed one setting at a time,( it's amazing what you have time for if you are
retired). We would make the change, go out to the road and make a run to test
the change. Russ drove each time. We would come back and evaluate the change.
We made about 10 runs including lunch. Russ had a lot of parts, so this
reduced the cost of tuning. After about three hours of this, these were the
results: 34 chokes, 3.5 aux,f2 emulsion, 50 F9 idle 45 pump jets, 160 mains,
and 160 air. It would not take full throttle with out choking, you had to add
throttle gradually. Our plan was to have me order some parts 32, 30 chokes and
40 pump jets and 160 main jets. One thing that bothered us was some times the
tack would work, and some time it would not. We checked all kinds of things
and couldn't come up with the solution. So I installed an Ignitor system on
another 25D dizzy and put it in. the problem was solved! When I got the parts,
I installed the 32 chokes. It was like a brand new car!! It loved those
chokes!. I hope to evaluate the 40 pump jets soon. And we have to go though
the mains and airs again.
It was nice to have the time to do this in a very methodical way. I now have
a Bugeye that drives much better than before. Now I can plan the changes to
the engine (shaved head, 1.5 rocker arms, 40 over pistons, and balanced and
lighten rods and crank) and do it all over again.
Now to tune into Flounder Vision!
Roger Cotting
59 Bugeye Yellow Beauty
60 Bugeye Ironhead
60 Bugeye project car
74 Midget for son
80 TR 8
95 Mitsu 3000GT
|