Team3S: 3000GT & Stealth Friday, November 2
2001 Volume 01 : Number
663
----------------------------------------------------------------------
Date:
Thu, 1 Nov 2001 09:51:11 -0800 (PST)
From: Jeff Lucius <
stealthman92@yahoo.com>
Subject:
Re: Team3S: Datalogging questions
>>>> So... are the 550cc's
too small for the GT357 turbos
>>>> to be boosting @
1.3bar?
>> No, they are too small for 1.3 bar
550 injectors
should not be too small for 1.3 bar. Here is why.
Conditions:
Ambient
14.5 psi and input air temp 110ºF means 0.0687 lb/CF air.
2.972L engine, 6000
RPM, 95% VE, and 2.3 density ratio means about
690 CFM of air.
690 CFM
of air would be about 47 lb/min or about 2844 lb/hr.
At a 12:1 A/F, about
237 lb/hr of fuel would be needed (maybe a
little more to quell knock) or
about 2490 cc/min. That would be only
415 cc/min per injector. 550 would be
running at ~75% IDC, which is
fine.
George might want to look at fuel
pressure to be sure it is correct
(1 psi over 43 psi for every psi of boost).
An undersized pump or low
voltage to the pump could reduce fuel supply. The
550s should be fine
at 1.3 bar. As Roger indicated, the turbo itself makes
almost no
difference.
Possibilities: The injectors used may not
actually flow 550 cc/min or
there may be one bad injector causing a lean
condition in one
cylinder and so making knock.
Are both cylinder
banks' O2 sensors monitored?
Are both EGT's monitored?
Air and
Fuel Flow calculators:
http://www.geocities.com/lutransys/jlucius/2-air-fuel-flow.htmJeff
Lucius,
www.stealth316.com-
----- Original Message -----
From: "Roger Gerl" <
roger.gerl@bluewin.ch>
To:
"AmkreadGTO" <
amkreadgto@yahoo.com>;
"Team3S"
<
team3S@stealth-3000gt.st>
Sent:
Thursday, November 01, 2001 10:16 AM
Subject: Re: Team3S: Datalogging
questions
*** Info:
http://www.Team3S.com/Rules.htm
***
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Date: Thu, 01 Nov 2001 13:42:34
EST
From:
RDO26@aol.comSubject:
Team3S: Re: Fw: JSpec Turbos
Just to add to the mix:
A couple of
years ago I bought some turbos sightunseen from someone out in California. When
they got here there was, to the best of my knowledge a 13G (staggered wheel),
and the other was a 9B. Stranger to me was that the 13G was the front turbo. I
had heard it is typically the rear turbo that fails (maybe being the reason for
a 13G replacement during the life of an engine). Going from old post either on
3SI or this list I know I'm not the only person who found that he has a pair
that is one 9 and one 13 (I'm pretty sure both thses came from the same
engine).
Ron
*** Info:
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***
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Date: Thu, 1 Nov 2001 10:44:48
-0800 (PST)
From: Owens Trent <
twice_blown@yahoo.com>
Subject:
RE: Team3S: Are our cars really that fast?
Chuck,
I lurk on the
list mostly soaking up as much knowledge
as possible from you and others
around the world.
I don't know too much about road racing however,
I
have been to the drag strip a few times.
I have a 95 R/T TT
with K&N & AVC-R. Something that
you may want to consider on
the long straights is
taking advantage of your Rev limiter.
First off
I like to up shift around 6K RPMs. The
torque curve has already begun
to fall by this time
however, the next gear usually puts me into the
"sweet
spot" of the Torque curve. When I shift I have found
it best
to take advantage of our rev limiter by not
lifting my foot off of the
throttle and bouncing the
revs off the limiter. I have seen this do a
couple
things:
1. Verified by the playback mode of the AVC-R,
Boost
does not fall between shifts. (During some runs the
boost did
come down however, it was slight
approximately .1 - .2 psi.) This keeps
the turbos
spooled and ready for max output when you up
shift.
2. Energy stays in the flywheel. This will give
you
a little extra bump when you grab your next gear. If
you have
upgraded to a lightened flywheel this wont be
as noticeable.
All in
all this technique usually nets me between .1
and .2 on my 1/4 ET. I
don't see why it couldn't help
you guys in the straights.
If anyone
would like to add to or disagree with my
suggestion I welcome the opportunity
to learn.
Trent
- --- "Willis, Charles E."
<
cewillis@TexasChildrensHospital.org>
wrote:
> One question I asked a while back that got no
> response
comes to mind - what
> is the approximate torque curve for 2nd gen
VR4
> totally stock? I'd be happy
> to see one with K&N
intake and 14.7 psi boost, but
> stock would help answer
> my
question. It has to do with when to shift on a
> road course.
My advanced
> instructors, all with NA cars, have always
>
encouraged me to run the rpm up
> to redline before upshifting.
Someone else on the
> list(s) said our cars'
> maximum torque was
much lower than 7000 rpm like
> 3000-5000. That implies
> that
I should be upshifting sooner.
>
> Running in higher gears is a
technique to carry more
> momentum through
> corners, but I am
asking specifically about
> launching out onto a long
>
straight. Maybe you drag racers can suggest
> something.
>
> Chuck Willis
*** Info:
http://www.Team3S.com/Rules.htm
***
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Date: Thu, 01 Nov 2001 13:12:59
-0600
From: RJM <
rjmsmail@swbell.net>
Subject: Re:
Team3S: Drag Racing with 700 HP
I can tell you I know some 1986=87 turbo
buick "street cars" that would mess up your score sheet Charles (in a
straight line of course), and, if you really want to talk modified,
a
couple twin turbo buicks. P.S. they all have automatic
transmissions too. It's all about how much you want to spend and like any
sport, how much you want to practice.
Bob
roger.gerl@bluewin.ch wrote:
>
> Needless to say my car is heavly modified, producing around 700 HP
>
> at the crank, however I have no trouble at all beating all of
>
> these cars handily in a quarter mile. I have yet to be beaten by
a
> > "street car". I believe our cars are capable of holding
there own
> > against any street car when properly modified.
Regards Charles
>
> Also needless to to say "show us the
facts, dyno (if available) and mods". How do you know yo uare runnign 700hp on
the crank ? Timeslips available ?? What is done to the ignition
?
>
> Roger
> 93'3000GT TT
>
www.rtec.ch*** Info:
http://www.Team3S.com/Rules.htm
***
------------------------------
Date: Thu, 1 Nov 2001 14:14:21
-0500
From: "Zobel, Kurt" <
KURT.ZOBEL@ca.com>
Subject: RE:
Team3S: car vs car vs car (was: Are our cars really that fast ?)
Sounds
like a bait and switch here!
I'd say most of the TT's could do in
the Spyder with a little more experience on the track.
The RX7, now that's
another story, especially at SP.
Sears point was hard to judge how well
one was actually doing. The slower cars Really slowed you down. Jim(RT TT) was
3-5 seconds faster than me(NA) in the limited times we got, yet I was able to
get way out ahead because I took advantage of a few slow pokes at the right
time.
Perhaps next time we will feel ok with group 4, all passing all
the time, where traffic is less confining.
Kurt
-
-----Original Message-----
From: Geoff Mohler
[mailto:gemohler@www.speedtoys.com]
Sent: Wednesday, October 31, 2001 10:04
PM
To: Jim Berry
Cc: Merritt; Sam Shelat; Zobel, Kurt; Team3S
Subject:
Re: Team3S: Are our cars really that fast?
Not -that- much of one...all
things considered.
Next time yer up, I think that'd be fun.
*g*
Im thinking I can break the 7 into mid-high 1:20s with some
work. 3
weekends ago I was 1:31..and then I discovered a disconnected
sway bar
link in the rear.
On Wed, 31 Oct 2001, Jim Berry
wrote:
> ----- Original Message -----
> From: Geoff Mohler
<
gemohler@www.speedtoys.com>
>
>
> > 1) The spyder ran away from all the 3S's I was near..but
perhaps they
> > werent going all out on a new track..thats very fair
to say.
>
> Not at Thunderhill --- it is more of a horsepower track
than Sears Point
> so you seemed to be at a disadvantage there.
>
> As to Sears Point I'd have to see some times to compare --- we
didn't
> get to run with each other when I started to feel more
comfortable with
> the track layout. I feel with a few more sessions the
Spyder would
> not be able to out pace my Stealth ---- I'll have to
figure out how to get
> back up there and prove my point. If you'd get a
Hot Lap timer we could
> at least compare times.
>
> Jim berry
Geoff
Mohler
*** Info:
http://www.Team3S.com/Rules.htm
***
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Date: Thu, 1 Nov 2001 13:41:32
-0800 (PST)
From: Geoff Mohler <
gemohler@www.speedtoys.com>
Subject:
Team3S: More raceday stuff online.
http://www.speedtoys.com/pics/10_27_28/All:
Send me your photos and videos once you have digitized em..to
place
online.
Thanks!
Geoff Mohler
*** Info:
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***
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Date: Thu, 1 Nov 2001 20:41:23
-0500
From: "bdtrent" <
bdtrent@netzero.net>
Subject:
Team3S: Used Turbos
For anyone interested, I've put my original turbos on
ebay. They had 30K
mi. prior to replacing them with 13g's. Aside
from damaging the exhaust
manifold flange on the front turbo when removing
them, they are in
perfect
condition.
Regards,
DaveT/92TT
*** Info:
http://www.Team3S.com/Rules.htm
***
------------------------------
Date: Thu, 1 Nov 2001 20:59:55
-0500
From: "bdtrent" <
bdtrent@netzero.net>
Subject:
Team3S: Comparing Performance
Unless I missed it, know one has mentioned
a relevant article in the March
92 issue of Road and Track. They asked
Danny Sullivan to generate the best
lap time possible in each of the current
performance cars at Willow Springs.
The results were impressive and as usual,
the writers had little good to say
about our cars, meanwhile the results
speak louder than the subjective
editors.
Miata - 1:14.96
MR-2 -
1:12.54
Lotus Elan - 1:10.22
300ZX Turbo - 1:08.07
Corvette LT1 -
1:07.36
Acura NSX - 1:07.14
3000GT VR4 - 1:06.95 (not bad for a stock 1st
gen.)
911 Turbo - 1:05.73
Mazda RX-7 -
1:05.64
Regards,
DaveT/92TT
*** Info:
http://www.Team3S.com/Rules.htm
***
------------------------------
Date: Thu, 1 Nov 2001 22:53:38
-0800
From: "BlackLight" <
BlackLight@Planetice.net>
Subject:
RE: Team3S: Comparing Performance
Anyone have picts of the article
scanned? Or better yet, a spare issue
for me :)
Matt
Nelson
1994 RT TT
Computer Sales Consultant
Gateway Computers, Salem
OR
Work Phone 503-587-7113
BlackLight@Planetice.Netwww.BlackLight.5u.com-
-----Original Message-----
From:
owner-team3s@team3s.com
[mailto:owner-team3s@team3s.com] On Behalf
Of bdtrent
Sent: Thursday,
November 01, 2001 6:00 PM
To: Team 3S
Subject: Team3S: Comparing
Performance
Unless I missed it, know one has mentioned a relevant article
in the
March 92 issue of Road and Track. They asked Danny Sullivan to
generate
the best lap time possible in each of the current performance cars
at
Willow Springs. The results were impressive and as usual, the
writers
had little good to say about our cars, meanwhile the results
speak
louder than the subjective editors.
Miata - 1:14.96
MR-2 -
1:12.54
Lotus Elan - 1:10.22
300ZX Turbo - 1:08.07
Corvette LT1 -
1:07.36
Acura NSX - 1:07.14
3000GT VR4 - 1:06.95 (not bad for a stock 1st
gen.)
911 Turbo - 1:05.73
Mazda RX-7 -
1:05.64
Regards,
DaveT/92TT
*** Info:
http://www.Team3S.com/Rules.htm
***
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Date: Fri, 2 Nov 2001 08:42:35
-0500
From: "Furman, Russell" <
RFurman2@MassMutual.com>
Subject:
Team3S: Replacing O2 Sensors
OK so I am going to try and replace the O2
sensors on my lady this weekend,
Anyone know where I can get the O2 socket
(other than the dealer) I really
do not want to break anything.
Also could someone with a 92-93 send me a
pic of the top of their throttle
body? I am most concerned with the Bypass
port
area
Thanks
Russ
*** Info:
http://www.Team3S.com/Rules.htm
***
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Date: Fri, 2 Nov 2001 12:28:16
-0500
From: Curtis McConnel <
CMcConnel@Pulte.com>
Subject:
Team3S: Upgrade Rods with Pistons?
I am looking to upgrade my pistons to
the JE high silicon 2618 alloys with
the cylinder bored .020 over. Do I need
to upgrade my rods also? I've heard
the stock rods are good rods and now is
the time if they need to be
replaced. I'm looking to run 18 psi daily and 20
at the track. I have
supporting mods: 550 injectors, Supra fuel pump, ARC II,
17g turbos, sperco
water injection etc.. The last thing I want is to put it
back together and
blow a rod.
Curtis
1995 Vr-4
Spyder
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End of Team3S: 3000GT &
Stealth V1
#663
***************************************