Went to the track again.
09-05-2002 | 10:12 AM
#1
Thread Starter
Registered User
Joined: Jul 2000
Posts: 2,735
From: Buffalo, NY
Went to the track again.
Well I went to the track and came back a bit disapointed...
My best run was a 12.9 at 107 with a 1.993 60' at 70* and 75% Humidity. The track was not prepared well at all, someone had an oil leak, etc.
I had 60'times in the 2.0-2.2 range all night!
A couple thoughts and concerns...
I added subframes since last time I went....is the car too tight? It didnt want to hook as well this time
I lowered my tire PSI from 26 last time to 20 this time, would that account for my MPH drop?
I raised my shift points from last time I went and my car feels a great bit faster than before but my MPH didnt budge???
Im thinking that maybe Im getting alot of knock on the top end. With the cutout open my car is extremely loud. Maybe Ill disarm the knock sensor next time....
------------------
96 black Z28 A4
GTP heads, GTP cam, bolt ons...
Mattucci Motorsports WNYFA FLFB
So far...12.7@108...need more practice...
The Z
My best run was a 12.9 at 107 with a 1.993 60' at 70* and 75% Humidity. The track was not prepared well at all, someone had an oil leak, etc.
I had 60'times in the 2.0-2.2 range all night!
A couple thoughts and concerns...
I added subframes since last time I went....is the car too tight? It didnt want to hook as well this time
I lowered my tire PSI from 26 last time to 20 this time, would that account for my MPH drop?
I raised my shift points from last time I went and my car feels a great bit faster than before but my MPH didnt budge???
Im thinking that maybe Im getting alot of knock on the top end. With the cutout open my car is extremely loud. Maybe Ill disarm the knock sensor next time....
------------------
96 black Z28 A4
GTP heads, GTP cam, bolt ons...
Mattucci Motorsports WNYFA FLFB
So far...12.7@108...need more practice...
The Z
09-05-2002 | 01:10 PM
#2
Registered User
Joined: Nov 2001
Posts: 1,582
From: Louisiana, USA
What kind of tires are you running? I think you need to try some et streets then you could knock those 60' times and run alot faster. What kind of converter and gear are you running? My car runs 12.50's @107mph with a 1.74 60' so that is what you are missing. I ran on et streets and with 3.23's. I think the reason your mph changed is b/c of different weather conditions. Later clint
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1995 T/A RamAir,17x9 WS6 polished rims,A4 Transgo 3:42's,LT4 Hotcam kit, mildly ported heads and intake, built 355 with forged pistons, LT4KM,NX N20 kit 125-175hp, Custom programming, AS&M headers, Vigilante 2800,
flowmaster catback, Fernco intake bellow,CSI w/p,MSD 6al, cutout. Everyday driver. New Et 12.50@107 N/A
11.61@117mph on N20. 1st decent N20 pass more to come!
------------------
1995 T/A RamAir,17x9 WS6 polished rims,A4 Transgo 3:42's,LT4 Hotcam kit, mildly ported heads and intake, built 355 with forged pistons, LT4KM,NX N20 kit 125-175hp, Custom programming, AS&M headers, Vigilante 2800,
flowmaster catback, Fernco intake bellow,CSI w/p,MSD 6al, cutout. Everyday driver. New Et 12.50@107 N/A
11.61@117mph on N20. 1st decent N20 pass more to come!
09-05-2002 | 01:16 PM
#3
Registered User
Joined: Oct 1999
Posts: 738
From: Tulsa, OK, USA
What was the baraometer like?
A lower baraometer would effect it greater than humidity would. What you need to do is to find out the DA (Density Altitude) for the day that you run. This will give you a good indication on how much HP you will have for the night.
Typically you want a high baro, low temp and low humidity. There is a bunch of calculaters on the net that you can plug the values in and it will tell you the DA.
Here is one http://rshelq.home.sprynet.com/calc_da.htm
Play around with it...
As for track prep, that can play a role in it as well.
A lower baraometer would effect it greater than humidity would. What you need to do is to find out the DA (Density Altitude) for the day that you run. This will give you a good indication on how much HP you will have for the night.
Typically you want a high baro, low temp and low humidity. There is a bunch of calculaters on the net that you can plug the values in and it will tell you the DA.
Here is one http://rshelq.home.sprynet.com/calc_da.htm
Play around with it...
As for track prep, that can play a role in it as well.
09-05-2002 | 05:34 PM
#5
Registered User
Joined: Feb 2001
Posts: 622
From: Mesa, Az
With your mods something is definately not right unless you are at a really high elevation.
------------------
94 Formula-6spd, New Mods are cloyes double roller timing set, CSI WP, Opti conversion,PCMFORLESS tuning, Comp R lifters and cc306, Hurst Shifter, Hotchkis Control Arms and Panhard Rod, Moroso Cai, Msd Ignition, Flowmaster Exhaust, Mac Headers & y-pipe, offroad pipe, Crane 10308 spring kit, 1.6 Promagnum RR's
Dyno with headers and RR's!
297rwhp
328rwtq
13.2@112.65(stock heads, full weight, 92 degrees outside)
------------------
94 Formula-6spd, New Mods are cloyes double roller timing set, CSI WP, Opti conversion,PCMFORLESS tuning, Comp R lifters and cc306, Hurst Shifter, Hotchkis Control Arms and Panhard Rod, Moroso Cai, Msd Ignition, Flowmaster Exhaust, Mac Headers & y-pipe, offroad pipe, Crane 10308 spring kit, 1.6 Promagnum RR's
Dyno with headers and RR's!
297rwhp
328rwtq
13.2@112.65(stock heads, full weight, 92 degrees outside)
09-05-2002 | 07:53 PM
#7
Registered User
Joined: May 1999
Posts: 1,173
From: Portage, MI USA
What kind of density altitude is best?
Ken, that is a great link.
------------------
Chad Beebe
'97 T/A WS6 M6 Dark Metallic Green
CC 306 cam and some other stuff.
My Car
12.762@109.13 with 1.828 60'
Best 60' 1.816
Ken, that is a great link.
------------------
Chad Beebe
'97 T/A WS6 M6 Dark Metallic Green
CC 306 cam and some other stuff.
My Car
12.762@109.13 with 1.828 60'
Best 60' 1.816
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