Sal----Aha! Another convert to the advantages to "forced induction"!
Others have expressed their opinions on where the advantages as well as
the pitfalls lie, as will I. Altho I took a different route some 20
years ago, the similarities to supercharging overlap. We know
detonation is the devil you don't want to dance with.
The later TR heads with the 7.5:1 CR is the best to start with, fo
achieve maximum boost. (10 lb.+) The higher the static CR, the less
boost can be attained. (Even with engine management systems) Doubling
the h.p. is not out of the question.
In an effort to reduce the CR, using thicker gaskets on shaved
heads is said to be "Iffy".
Anything that reduces the charge temperature is the road to more
boost power. This includes any combination of intercooling, water
injection, or cold air sources.
The more you "squeeze"air the hotter it gets.
Forged pistons are of course less prone to breaking than the cast
pistons...but cast pistons do not break if you stay out of detonation.
The ring lands are the weak link. (Why they cut them square I'll never
know. This is a built-in stress riser)
It is written that lean air/fuel mixes can melt (aluminum)
pistons.--- 1200 deg. Still, it would take sustained runs on boost
conditions for this to happen, such as on a race track. It's unlikely
one could run long enough for this to happen on a public road, as speeds
would quickly be into the triple digits.
Besides, power would be down and noticeably felt by the driver.
Another reason to invest in an A/F monitor when going after major
power.
Ignition systems that automatically reduce the timing under boost
conditions is the way to go.
(Less timing is needed as cylinder pressures go up).
If you like the sound of an engine running with a loping camshaft,
include this with the SC.
Learn to say: Good morning, judge!
Dick
From: salva57@optonline.net Date: Tue, Jun 28, 2005, 9:26pm (PDT+3)
upgrades
As far as engine upgrades go, I have found that the best bang for the
buck combined with ease of installation and tuning, nothing beats
supercharging. I have installed my bolt on setup and tested it over a
weekend, on my stock motor and gained plenty of torque and HP's, tuning
one carb only with smooth idle and no overheating. The low stresses of a
stock motor during idle and cruising, and plenty of power when I punch
it.The best of both worlds ? I know for a fact that many on this list
can attest to that.
Sal Vespertino
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