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Originally some quite interesting engine mods have been done to the car. The fuel injection system has all been stripped out and has been replaced with a set of Mikuni throttle bodies and carbs:
The car also has a full exhaust system - 4-1 manifold, cat replacement pipe and back box. I'm not sure on the make yet - I can't find any specific markings on the exhaust except the Japanese JASMA mark.
The pics above show what they looked like when I first got the car back in 2000 or so. Since then I've had a bit of a problem with a crank failure. That was fixed with the loctite repair and lasted for a good 3 years or so.
Its been wearing out
steadily since, so I bought a 1.6 93 engine which I stripped down and rebuilt
from the bottom up. I did a bit for porting and polishing to the head while it
was off - cleaned it totally, opened up the ports to match the gaskets and
smoothed everything down.
Anyway, got it on the rollers to get the carbs balanced and tuned in correctly
and was very (and pleasantly) surprised with the result. I tested the old engine
before the swap and was getting about 93 bhp at the wheels and about 116 and the
fly with about 110 ft lbs. This time I got 122.8 at the wheels and 153.5 at the
fly at 7000 rpm. Torque rose to a max of 125.3 too. I had the old engine (with
just the carbs) running at one point with about 127bhp at the fly a few years
ago, so you can see how much it was wearing out.
I've been using the same garage for my tuning for the last few years, so both
runs were done at the same place using the same equipment
(http://homepage.ntlworld.com/jon.lee53/INDEX.HTM) so I don't believe it is
exaggerated. He said himself he was surprised and re-checked everything to get
the same results.
How does it feel? Well, a hell of a lot smoother. Power ran out at about 6000
rpm on the old engine, where this pulls to 7500 with no problems.
Looking at the two graphs and comparing them, the two are pretty similar up to
4500 rpm. The old engine tails off and the new engine just continues to climb.
You can see a little step on the old graph at about 4500 rpm where there is a
significant drop...
The last power run was without the air filters on - I've got 4 trumpet socks
over each pipe currently. I was told that these are very restrictive, so I'm
after an air box now to fit over the trumpets and have just one large air filter
located behind the pop-up.
Pics (in a vague order):
Dyno charts:
Sound file: