[s-cars] More dyno results- 1/4 mile pool
calvinlc at earthlink.net
calvinlc at earthlink.net
Sun Jul 10 17:35:50 EDT 2005
Dave,
Well let's see here. My '92 S4 with only a chip went from 14.6 to 14.05
going from CO to Sea level. However, it only picked up 1.2 MPH in trap
speed. The difference down here seems to be the ability to get off the line
due to that extra 2 psi of ambient pressure before the turbo gets fully
spooled. If you are only going down to 3k feet it won't be nearly as nice
as running at true sea level.
I am going to bet on about 13.0 at 110 mph at 3k feet. If you post your
dyno results I'll give you a better prediction with a home-built tool I
have.
My only challenge to you would be to beat my s-car 1.90 60 foot time :) If
you run it at Bandimere I will be happy to come out and run mine again when
you run it...provided it's after Aug 15th or so since I will be down here at
Cape Canaveral until then.
--Calvin
-----Original Message-----
From: s-car-list-bounces at audifans.com
[mailto:s-car-list-bounces at audifans.com]On Behalf Of djdawson2 at aol.com
Sent: Wednesday, July 06, 2005 1:08 PM
To: joe.pizzimenti at gmail.com
Cc: s-car-list at audifans.com
Subject: [s-cars] More dyno results- 1/4 mile pool
Good Joe,
Yeah, I don't care about the money... I just want some of the folks who
believe the CO based (and SAE corrected) dyno figures to be bogus, to ante
up with their 1/4 mile time guesses.
I'd like to put both the 1/4 mile issue, and the SAE correction issue to bed
sometime this summer. I think I can hook up with Javad for some sea-level
uncorrected dyno time, and I know I can get to a near sea-level dragstrip.
Come out of the woodwork guys... and let's have your estimates... time and
mph.
Dave
-----Original Message-----
From: Joe Pizzimenti <joe.pizzimenti at gmail.com>
To: Djdawson2 at aol.com <Djdawson2 at aol.com>
Cc: s-car-list at audifans.com
Sent: Wed, 6 Jul 2005 07:53:06 -0400
Subject: Re: [s-cars] More dyno results
So who wants in on a betting pool?
I say we do it Superbowl style, and have a tournament.
Use MS Excel:
http://www.cheapassracing.org/s-car/DawsonPool.xls
$20.00 buy-in, winner splits it with Dawson 50/50, minus paypal fees.
Who's in?
Joe, shouldn't this be in the Marketplace?, Pizzo
On 7/5/05, Djdawson2 at aol.com <Djdawson2 at aol.com> wrote:
> For those who aren't sick of seeing my dyno posts ;-)...
>
> This past Saturday, I was able to do a little more time at the dyno. As
of
> my last dyno post, the car was making 418/445 at the wheels, (like it or
not)
> SAE corrected.
>
> Since that post, a few things have been done.
>
> First, the turbine housing on the GT30R was changed from a .82 to a .63
A/R
> unit. This was aimed at providing a quicker "hit" (which it does), but
> should result in a lower peak hp.
>
> Second, an additional resonator was added to the exhaust system to
eliminate
> the drone... again, should result in a reduced peak number.
>
> Third, I decided to try a very cheap FMIC. I purchased a bar and plate
IC
> on ebay that cost $229. It has a 22" x 8" x 3.5" core, and has cast
aluminum
> end tanks with 2.5" inlet and outlet already built in, and in the correct
> location. I also bought a box of 6 2.5" polished aluminum 90 degree
elbows
that
> each had one long leg. This was $79.99. Other than that, the "kit"
> required 2 2.5" silicon 45 degree elbows, a 2 - 2.5" silicon transition,
and
one 4"
> section of straight 2.5" silicon hose... about $60 for that stuff.
>
> The FMIC was surprisingly easy to put together... took about 6 hours of
> work. I did the welding myself, but that could have been eliminated by
simply
> using silicon connectors. The whole thing cost under $400, but the labor
was
> "free."
>
> Off to the dyno...
> I did 3 pulls, and all were remarkably similar, indicating that the IC was
> performing very well. Previously, I would see large losses between pulls
with
> the stock IC.
>
> The numbers were 442/430, and only varied by 1 hp, or 1 ft/lb between
runs.
> In fact, the third one was the highest reading.
>
> Other interesting notes... The hp figures no longer looked like peaks.
In
> fact, the curve would cross the 420hp line, and remain there until
7500rpm,
> where I would end the run. The "area under the curve" was a huge
improvement
> compared to prior runs. These things all seemed to indicate that el
cheapo
> FMIC was performing great.
>
> Bad news... I lost 15 ft/lbs of torque, even though the curve as a whole
> looks better. Lastly, don't ask me for a copy of the dyno chart, as I
don't
> have any yet. The guys at MAC Autosport lost the files, and all I have
are
the
> printouts, which I'll try and make available soon to those who may want
them.
>
> 3 last things to try include a 928 MAF, and RS2 exhaust cam, and a return
to
> the .82 A/R turbine housing. The .63 does hit a little earlier, but
> compressor surge is a problem in higher gears/low rpm.
>
> I'm thinking that I should be able to get this engine into the 470-480
range
> when all is said and done. After that, I'll drag it out to sea level for
> some dyno runs, as well as some real quarter mile runs to provide data
that
> some feel is more valid than the SAE corrected data.
>
> That's it for now.
> Take care,
> Dave
> _______________________________________________
> S-CAR-List mailing list
> S-CAR-List at audifans.com
> http://www.audifans.com/mailman/listinfo/s-car-list
>
_______________________________________________
S-CAR-List mailing list
S-CAR-List at audifans.com
http://www.audifans.com/mailman/listinfo/s-car-list
_______________________________________________
S-CAR-List mailing list
S-CAR-List at audifans.com
http://www.audifans.com/mailman/listinfo/s-car-list
More information about the S-CAR-List
mailing list