Jim:
If you can recall the times, we can compute how many HP you
picked up
from the change. The math is straight forward, although you might be
shocked
at how low the baseline numbers are. The factory numbers are peak HP at
the
flywheel (FWHP). Figure you lose 15% through the drive train, so you
only have
about 88HP to play with at the wheels. Then recall that you are applying
0 HP
while shifting, and that the engine is almost never operating at it's
power
peak.
I did a quick computation for the stock TR6. Assume a 10.5 sec
0-60 time, and the average Rear Wheel HP (RWHP) comes out about 60HP
averaged over the entire 10.5 sec. Disappointing to say the least.
Cheers,
Vance
-----Original Message-----
From: owner-6pack@autox.team.net [mailto:owner-6pack@autox.team.net] On
Behalf Of Jim Jones
Sent: Tuesday, October 26, 2004 3:28 PM
To: Kai M. Radicke
Cc: 6pack
Subject: Re: exhaust header replacement
Here's my experience:
I did a very approximate before and after exhaust test with my car.
(Holding a stop watch while driving from 5 to 80 MPH.)
The "before" system was stock for a 72 - dual exhaust manifold and pipes
with muffler.
The "after" system consists of Triumph Tune 6-2-1 header (ceramic
coated) and Triumph Tune single 2 1/4" stainless exhaust with a free
flow silencer. It's fairly loud but not awful.
I forget the exact ET's, but I do recall that the "after" system shaved
nearly a half second off the ET compared to stock. I ran each test 3
times on the same stretch of road. This was not a truly scientific test,
but it was enough to satisfy me.
The TT headers needed some tweaking to fit, but I have no complaints
about them. Good quality stock and flanges. The stainless system is a
quality piece, too. I'd hat to see what these puppies cost now!
Jim
Check out the new British Cars Forum:
http://www.team.net/the-local/tiki-view_forum.php?forumId=8
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