[s-cars] 80tq Update: 516 wheel hp, 450 wheel TQ

[Leal, Christopher]

Hap,

Hope all is well in Evahboost. It's great that we can all share our findings
as it helps make all of our cars faster. I've certainly learned from your
trials and posts.

Although a noble cause it becomes increasingly difficult to come to accurate
conclusions without scientific method employed. The toughest thing is that
there are so many different combinations of parts and chip tuning, altitude
and dynos, and so on..... accurate comparisons become next to
impossible. Hey but we try to do the best with the data points we have. Even
those from our buttometer. :-)

Remembering that Javad's setup has no Mass Air Sensor or restrictive air
cleaner and an intercooler that has a larger cross section than the
Happerunit, I would suspect that the only advantage your car has, as you
suggested, would be the throttle body and intake. To claim that there is
more than 5-10 ftlbs of torque found over the 3B or stock AAN manifold seems
like a stretch. But I would like to be proven wrong. If we had more data
points like the boost curve overlayed on the dyno plot that may help draw
more accurate conclusions.

Since we are making guesses. My bets are on the cams and turbo having a much
bigger effect than any "clearing of the pipes" after the intercooler in this
case. Javad's previous tests with big cams and back to back Dyno testing
found a huge amount of torque lost at lower RPM's.

If anyone has played with cam timing on this motor I would love to hear
about your experiences, please. A shop incorrectly installed my Rs2 cams so
I've only played with retarded cam timing by accident :-)

So we are back to guessing until we see every combination tested on the same
engine and Dyno. If we could just get Javad to swap out to a modified AAN
intake, drive his car to Colorado, we can test the altitude, cam, turbo,
dyno theories with more accurate results.

Like a lot of people I just want untainted information so that I can build
my car better. With that said I am glad to have such great people on the
list. You've all helped me tremendously.

Hap, Keep up the bling factor and you'll have another trophy for your
collection. Love your car. Please don't get carried away and show up with a
gold front tooth and Dubs at the next nationals. :-#


--------------------------------------------
Message: 5
Date: Thu, 3 Mar 2005 11:14:00 EST
From: CaptMagu at aol.com
Subject: Re: [s-cars] 80tq Update: 516 wheel hp, 450 wheel TQ
To: JShadzi at aol.com, s-car-list at audifans.com, quattro at audifans.com,
	ba-group at audifans.com
Message-ID: <75.40377e3b.2f5891c8 at aol.com>
Content-Type: text/plain; charset="US-ASCII"

Javad

First of all, thank you for your painstaking data logging as you've gone
along on this project. As I compare some of my altitude compensated dyno
graphs,
there are some striking differences. With both your current T-61 and the HO
hybrid graphs, your torque figures are significantly lower than your
horsepower
values. In my case, lets talk round numbers so we don't get into any
altitude
conversion gobledygook(very technical engineering jargon), my torque values
exceed the horsepower significantly. This produces a nice looking double
hump
graph that provides a very streetable car.

I realize that streetability is not what you were about here, but I think
there is an avenue that you can improve upon that would provide more down
low
power. I'm talking about your charge air system from your compressor outlet
through the head. I've done a lot of work on my charge air plumbing and I
think
that's where I get my more robust torque curve. As these large compressor
turbos
are trying to spool up, any blockage in the charge air path will hinder the
spool. Once they're up to speed, there's not much that is going to get in
the
way of their power. I've had a lot of work done to my FMIC to enhance its
flow
characteristics. I also had a lot of work done to my intake manifold i.e.
drilled, ported, enlarged. My throttle body had a Big Bore mod done to it. I
know
you've had your head ported and so have I but if the restriction is on the
way
there, its not going to matter.

You probably remember that I had a similar fueling issue when I had my car
out there a little over a year ago. My solution was a fuel reservoir, for
the
stock pump to feed, 044 Bosch pump, larger fuel lines, and larger injectors.

Anyway, I just thought I'd share some. Regardless, keep up the great work. I
should be mounting my tubular manifold and GT 35R shortly. I had a .63 AR GT
30R hot side machined to fit my 35R so the results should be very
interesting.
Oh yeah, I polished the compressor;-) Gotta be worth something!

Hap, wit dakine turbo talk from Evahboost, Maguire