#2
A hydraulic cam is supposed to be quieter running and have less maintenance
then solid lifters, (the manuel tappet adjustments required by stock tr6's)i
have read that they are supposed to deliver power over a wider rev range and
maintain idle quality.
Too bad they don't make valve covers out of lexan.
lol
Al Salvatore
76tr6 daily
.----- Original Message -----
From: "Jim Swarthout" <jswarth1@tampabay.rr.com>
To: <6pack@autox.team.net>
Sent: Saturday, November 30, 2002 11:35 PM
Subject: TR-6 performance
> I have enjoyed reading the latest thoughts, and theories, regarding the
> performance of a "TR-6".
>
> There have been numerous discussions about Roller Rockers, compression
> ratio's, super-charging, Cam Shafts, nitrous-oxide, After market wheels,
> Petrol Injection, Urethane bushings, The adaptation of Toyota
> transmissions & Nissan differentials, even thoughts that the whole
> drive-train, engine and all, should be replaced with, "burp", high tech
> components! Why not just take the classic looking body and put it on
> your favorite "POS"...seems easier!!! Of course, "those in the know"!!!
> Will soon consider!!! Changing the not so "NEW" body style...for
> Christ's sake simply buy another car!!!
>
> I almost feel like I'm in the company of Juan Fangio or maybe Phil Hill
> with all of these technical discussions. But I know I'm not! Learn to
> tune your car...yourself!!! Learn to drive your car!!! Any idiot who
> will make the comment that a TR-6 transmission is archaic by design does
> not have a clue what he is talking about!!! If you're used to "D" for
> "GO" and "R" for "back-up, take a silly class or something! Stop bashing
> the gears and learn how to drive!!! A TR-6 is not a dragster, (I.E.
> Nitrous Oxide). What difference does it make that the person in front of
> you with a new..."who cares"...just left the light quicker than you
> could!!! A TR-6 properly tuned...suspension first...then
> engine...performs wonderfully!!! Well beyond the capabilities of most
> drivers!!!
>
> I love it when people prattle-on about "high-tech" auto parts.
>
> Case in point; In addition to my 74 "6", I also recently acquired a 1978
> X 1/9. I know...I know...(FIAT)...(F)ix (I)t (A)gain (T)ony!!! But you
> know after a really good tune up, this engine turns 7,000 without
> hesitation!!! It's a blast to drive!!! AND GUESS WHAT, "GULP", IT HAS
> IGNITION POINTS!!! So does my "6". I'm now ready to investigate the
> possibility of upgrading to an electronic ignition. Yeah right!!!
>
> The first person to accurately answer one of the questions below will
> receive a set of CNC machined roller rockers for a 250/GT6/6. Contrary
> to popular thoughts: roller rockers, properly designed, with added
> ratio, "will" greatly add to the performance of the 2.0L & 2.5L stock TR
> engine. Increased low end torque, and higher RPM power are immediately
> noticed in a stock engine.
>
> 1) There were 2 reasons why electronic ignition was developed? Both
> answers pertain to the consumer, or auto owner.
>
> 2) Upon introduction: Hydraulic Camshafts were touted to be a technology
> breakthrough. Why? Was it really a ruse? Today many people believe that
> hydraulic cams have a grind profile that is far superior to anything
> that could be achieved in a mechanical cam. Is this True or False?
>
> 3) What does an air pump, (smog pump), do? Explain the entire
> cycle...peripheral equipment!
>
> 4) Why will roller rockers of an equal ratio open the valves further?
>
> 5) What performance gains will you achieve by installing a long
> duration...(extended period of valve opening)..., high lift, camshaft in
> an otherwise stock engine?
>
> 6) Why does an early Ferrari have a "true" 5-speed gearbox, but a 2003
> Toyota does not?
>
> 7) Suppose you have two 152ci TR engines side-by-side; same, make,
> model. One engine has a compression ratio of 12:1 with a static
> compression of 90. The other engine has a compression ratio of 7.5:1
> with a static compression of 200. Which engine would you want in your
> car? Why?
>
> 8) Is compression ratio related to static compression? Yes or No, and
> why?
>
> 9) You're speedometer shows 60MPH. You're Tachometer shows 3000 RPM's.
> You're in 4th gear at 1:1 with a final drive ratio of 4:10. What is the
> outside diameter of your tires?
>
> 10) What are the differences between a machined part, a forging, and a
> casting? Which is better? For what application? Be specific!
>
> 11) How are engine firing orders determined by the engineers? Is it
> rhyme or reason?
>
> 12) If the piston to be fired is approaching compression...(15 degrees
> BTDC)... and you have the timing set to fire at 10 degrees Before
> TDC...why doesn't the piston travel back down...moving in the direction
> from which it just came...?
>
>
> Best Regards,
>
> Jim
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