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Until I get
all of the pictures back from the other guys, this will just be
about my car and the results
of all of the work done over the past three years, since the
last run in 2007. I then had the triple ZS carbs, 8.5 to 1
compression
and three lobes that were going south on my cam. I still
wanted to get it done just to have a starting point to work
from.
All of the
engine work that I did to the car is also covered here on my
site, if you look down the left side of the page.
The engine
rebuilding starts here with the
machining.
The cam
that is now in the car is the TH5 grind, courtesy of Greg at
British Parts North West. Greg highly recommended it
at the time, based
on everything else that I was doing to the engine and I'm very
satisfied with the performance and drivability of the
combination of parts he suggested.
John
Sancoucy keeps a record of every car that he runs through his
shop. He took the best pull from my 2007 run and
it will show on the charts at the top. It is the base line
for this start and you can see it was only 77HP at that time.
This was my
previous run and as you can see I was running WAY too rich.
Worn cam lobes, can't breathe out, not good results.
This was
done in AUGUST 2007
Now a few data views of 2010.
You can see the starting 77.24HP run at the top of the Run
Files.
You can also see the
extremely rich 10.0 Air Fuel ratio that killed the power
readings.
The 2010 runs are in order
from the bottom up. We did lean out all three carbs, 1/4
turn between run #4 and #5-#6.
Since the power seemed to be
climbing at 5,000, we decided to make a run at 6,000rpms and
that is Run #7.
As one can see, the power fell of the chart after 5,400rpms, so
the cam held true to it's rating of having great mid range
power,
between 2,000 and 5,000rpms. I think with another set of
needles and timing adjustments another 5-10HP may be available,
but I'm happy at these numbers. I don't want to get too
lean and burn a valve or piston.
If you notice, the run back
in 2007 was at 10:26AM and it was already 90+ degrees in the
shop that day.
The runs this year were at
73, so that was much better for performance readings.
Looking at the A/F chart, I
was at a more comfortable 11.6-12.3 readings at WOT (wide open
throttle) on all of the runs after we leaned it back, just a
bit.
If this big fan doesn't suck
out all of the fumes from every car running at WOT, we're all
gonna get real sick!
The great ignition debate.
Which distributor did I have this time? Naturally, the
custom curve done by
Jeff at Advance
Distributors along with the adjustable timing wheel and the
Pertronix Ignition with Flame Thrower Coil.
We're hooked in to the
computer and it's time for me to get in and get it going.....
This was after the run and
the cool down period outside. It was a fun ride home......
I will add more pictures as I
get them. The next time, I'm doing a video to add in here.
I hope Erik's came out OK this time.
Thanks to Paul & John!
NE Dyno & Tuning
169 Davis Street Route 16
Douglas, MA 01516
Phone # (508) 476-7795
www.nedyno.com
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