RML:
Do we get a prize for the correct answer? An "attaboy", a free
donut, anything?
Ahem. <pause while I put on my "Karnak the Magnificent" turban>.
Please hand me the mayonnaise jar. And the answer is:
I am going to go with the cam. The missing at low RPM says
something is clearly "amiss" (Har-har. I crack myself up), and I am
betting you gave us a pretty solid clue in there somewhere. I will say
that a lifter went flat during the test runs, or the cam was mis-timed
(not likely for someone who has built several engines, but anyone can
make a mistake).
Remember, my opinion is worth exactly what you paid for it.
Cheers,
Vance
-----Original Message-----
From: owner-6pack@Autox.Team.Net [mailto:owner-6pack@Autox.Team.Net] On
Behalf Of Robert Lang
Sent: November 19, 2007 7:38 AM
To: 6pack@autox.team.net
Subject: [6pack] Engine Quiz
Hi,
Let's assume that an engine builder is somewhat knowledgable and has
built
10 or more engines...
<snip>
Okay - so the engine is installed in the car and run up a few times.
Throttle response is quite snappy, as can be expected with a high
compression engine. Interstingly, there are minor mis-fires at small
throttle openings and pretty much only when the motor is cold. But other
than that, it runs seemingly okay. Ignition is perfect - 42 degrees of
dwell, 10 BTDC static, 33 BTDC at 3000 and rock solid. NO spark scatter.
So, we strap the car to the dyno.
<snip>
Okay, so we have insignificant power gain despite lots of internal mods
including the compression ratio boost. The power gains chould have been
in
the 15 HP range min. Where did the power go and what was the fix?
regards,
rml
p.s. I already know the answer
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