The turbo works well. The first careful accelerations with about 3/4
throttle (no kick-down) gave a 0-62 mph (0-100 km/h) of about 9.0 seconds
which is about three seconds off the time. Detonation stopped me from
giving full gas. After this I've dropped the basic fuel mixture to lambda
= 0.9 (AFR = 13.2) and the ignition max advance is retarded by 6 degrees
(25 -> 19) by setting the EZL to position N. There is practically now
knock at part throttle.
The boost gauge shows about 0.5 bar (7
psi) vacuum at idle and when driving the pressure values are between -0.7
bar (-10 psi) and +0.7 bar (+10 psi). The wastegate should be rated 0.4
bars (6 psi) so maybe the wastegate won't open all the way? All the same
the car is like newborn and the acceleration is satisfying. In the city
the car works as good as before so I can crawl in the que with it. Tuning
and testing continues...
There is problem with the rubber hose
from the air meter to the idle valve which flies off at high boost. I must
see how I can attach it better.
Here are a few pictures of the CIS-E (KE-Jetronic) injection air meter and
fuel distributor unit. More pics from
CIS-E injection unit
here is the problematic hose and it's
attachment. Sergey from mersuforum.net gave me some advice about the
problem, must try them out.
The first WOT quartermile looks like this. The weight is about 2860 lbs
and the result is 16.6@136 km/h (84.5 mph) measured with the
Paetronicsin meter RS 100. This is
1.8 seconds off the N/A time. Base lambda is 0.9 and max advance is 19
degrees (EZL KAT pos N) with 98 RON pump gas.
The next subproject was an air to water intercooler. Bought a small pump
and a heater core....never came to anything.
The copper brake line didn't work as the turbo oil line, it broke probably
due to vibration. The smoke gave away the situation before any bigger
damage. Must get a braided oil line.
Problems with boost hose because the compressor outlet is so small.
Still problems with knock. Dropped the
ignition max advance to 17 degrees (EZL KAT pos 6). The response off
boost is not so good because if the ignition setting. The EHA base
mechanical mixture value is 0,90 (AFR = 13.2). The programmable target lambda is
The oil line and boost hose work good now after using better parts.
The ignition is still under construction. I put the intake air sensor back
in the system in the boost hose before the pressure box. It controls the
ignition when intake air temperature exceeds 90 degrees F (32 degrees C).
This may control the max ignition advance.
Beecause of the small base advance the
engine is lazy and thirsty at cruise speed. I have considered building a
programmable ignition controller from
Jaycarin Electronic kits KC 5442, KC 5443 ja KC 5386. They are
introduced in the
Chip web magazine . One possibility is a Megasquirt with ignition