Chapter 20
Latest
Entry
12/19/01
Since last episode, I have been trying to get the engine to idle. I set
the static advance using a modern type timing light which works almost as well
as a distributor curving machine. I believe that the static is now about
15 degrees. The vacuum setup has not been connected yet because the
idle/vacuum situation needed to be ironed out. The car would stumble and
die if I didn’t continue to goose the throttle. I couldn’t get it to run
on fast idle either. Finally, I took the carb top off and set the floats closer
to the top of the chamber. I also had read that drilling out the idle
jets 0.010” more than standard might help, but before doing this I wanted to
check whether the accelerator pump was what was keeping things going. I
disconnected it, and the problem got worse. A mechanic friend had
suggested that drilling small holes in the primary butterflys might help.
This would put more air thru without opening up the transfer ports. Well, after
seeing that the engine ran better with a bit more gas, I drilled out the idle
jets with great improvement in idle and transition. The drills I used
were purchased at a hobby supply store and go down to very small sizes. Now
that the idle is sorted out better, I can figure out what the vacuum/boost
“curve” is from each of the ports on the carb. One is manifold pressure
and the other is the “ported” value. Right now, the canister is set to
retard the timing a bit too much under load, and I will need to revise my
formula.
I
routed gas temporarily around the mechanical pump, and it seems pretty happy
this way, delivering 6 to 9 pounds all the time. The A/F meter is reading
in the .8 and .9 volt region most of the time now, and the plugs look
ok. It’s getting cold here, and I need to get the heater motor
hooked up next.
1/30/02
I've been getting another vehicle up and running, but have been thinking about
the TurboStude. In the meantime, it has been cold and slippery here, and
not conducive with high speed or good traction..... The heater, however,
is working fine and the engine is settling in with a fairly low idle. The
thing is rich enough now on open throttle to make me a little less nervous, and
one of the rattling sounds which I thought was suspicious for detonation has
largely disappeared. Now I can concentrate on the driveline a bit.
When I put my foot into it at almost any rpm, the engine runs away from the
clutch. Don't smell any burning, but I must assume that either it is
coated with an oily, caked residue like an old iron frying pan, or the lining
is just plain gone. The clutch springing never felt like much of anything
from the beginning (now about 500 miles ago). One way or another, I decided
that I need something more substantial. I found that though I can't go to
a bigger clutch in the stock setup, I can put in stronger springs on the
pressure plate and add ceramic parts to the disk. 1 2 3 4
I was advised to get the flywheel face resurfaced at the same
time. These things can apparently be done by anyone who normally does
clutches. It will, however cost me $200. If I were ready, I could
have figured out a way to take an old Ford automatic tranny, change the input
shaft and come up with something useable, but this seemed pretty
straight-forward. The clutch guys said that this would probably be ok to
about 200-250 HP.
I originally set out to double the HP of my engine, and now, with up
to #15 boost, my calcs say that I am up at least to the HP above. I used
"Dragstrip Plus"
to try figuring out what might be going on. It allows one to try changing
various elements of the formula. Though the assumptions on my camshaft
are a bit off, it says that with proper gearing ,tire adhesion, and a cool
engine, I already have a 13 second car! Well, I don't know if I believe
that, but I have determined from the program that the optimal rear-end for this
car in a quarter mile competition would be somewhere around 3.90 which would
put me under 14 seconds at almost 100 mph.
The program was not shy pointing out that my valves were smallish
(1.3") and my lift was tiny (0.28") and that my camming was
skimpy. Now, I'm not sure how well it understands what happens to
breathing when a turbo is added, but it did ask specific questions about the
turbo (but not ratios or anything that deep). I'll try the 3.40 rear-end
in it, but found out that if I do want to change, the 8" rear can be built
up just like a 9" with a limited slip pumpkin and a higher (numerically)
gear. The program actually told me NOT to go to anything as tall as a
4.56, though if I did, it would be a good 1/8th mile car. It also showed
me how significant the rear tire height can be in terms of ET and MPH.
Also surprising was what a positive effect running a cold engine could have.None
the less, Ted Harbit likes to warm them up and I'll follow his
prescription! My buddy has convinced me that I'd better put on some good
brakes up front before I kill myself, so I will be bolting on a disk brake
conversion kit I had been saving for the 53' Studillac. Since the
TurboStude has spindles from a 54', it should be pretty straight-forward,
though I may hold on the dual
master cylinder conversion for the time
being. I guess I'll spend the $800 at some point for the Turner
conversion on the 53'...... http://www.turnerbrake.com/
