Syclone ran 12.485 at 4250 ft. above sea level

HighPerformanceTrucks

HighPerformanceTrucks

Lift & Shift Specialist
I ran my truck in the high desert at Top Gun Raceway in Fallon, NV today.

I decided to travel to Fallon, since the ass clowns at Sacramento won't allow any "street legal" vehicles run at their test n' tune anymore. Sacramento raceway is only 250 feet above sea level and it would be much easier to run 11's there than in the thinner air at Fallon. My mph was down about 2 mph Fallon.

I'm considering going to Redding Raceway even though it's a 3 hour drive since it's my next closest low altitude track option.

Btw, I am having a conflict with boost readings from my autometer boost gauge vs. the map sensor signal to the ECM. For example, if my manual boost gauge shows say 22 psi and my ultimate is set to 22 psi, then the overboost safety feature gets triggered during the race. This always happens about the last 1/3rd of the track. I'm thinking the map sensor is maybe tired or it's calibrated on the low side, so if the manual boost gauge reads 22 psi, perhaps the map sensor is reading 24 psi? Don't really know. Maybe the boost gauge is an inaccurate piece of crap.

I ran 110 octane on my 22 PSI T-2 but had 8 degrees of KR. This was my 12.485 run, btw. I then added 3 gallons of 114 to raise the octane to suppress detonation so I could run more aggressive timing. It helped out somewhat.

My plan for 11's at a sea level track will be to run 118 octane on the 24 PSI T-3 program. The tricky part will be where to properly set the boost dial on the Boost Command and keep from overshooting 24 psi.

Oh yeah, does anyone have a formula to adjust the time of my run if I had ran at sea level?

Thanks.

Adam Auerbach
Sy #2419
 
HighPerformanceTrucks

HighPerformanceTrucks

Lift & Shift Specialist
Falco said:
Adam,


But AFAIK it will give you incorrect results with forced induction. In most of the time people can't reproduce their corrected times at sea level in a turbo application...

Later,
Click to expand...

Yeah, that was what I was afraid of. I probably lost only 2 to 3 tenths.

Thanks for the link.

Adam
 
HighPerformanceTrucks

HighPerformanceTrucks

Lift & Shift Specialist
ivanko barbell said:
ivanko barbell said:
Syclone#1992 said:
What are your mods?
Click to expand...
PTE TE-44 Wet center
PTE 3" Downpipe w/ dump tube open
Mitsubishi 1st Gen Eclipse BOV crushed to hold 24 psi
Ultimate version 6 set to T-2 22 psi.
Boost Command set to ~22 psi. (I set a bit under the overboost limit)
Stock upper IC - Heat Shield Wrapped
Lower IC Exchanger - Tony Dequick
ATR Aux intercooler kit
Jabsco Pump
ATR Cold Air Kit
Air Flow Systems Cobra Head Elbow
Modified Bob Galla Turbo to IC pipe
Custom K&N Cone Filter
Aquamist Water Injection using two 6mm jets and flow meter.
Dual Spal Fans running during entire pass
160 degree thermostat
Redline Oil
Redline Water Wetter
Brian Hartman Stage VII tranny w/ TCS 2800 stall billet converter (tighter version)
Redline Ford Type Racing Tranny Fluid
Lube Guard
Dual Tru Cool run in tranny coolers plumbed in series
TCI SFI Flexplate
ARP Flexplate Bolts
TCI Aluminum Tranny Pan
Dynotech Metal Matrix Rear Drive Shaft
Redline Axle Lubricant in both axles
Aluminum rear diff cover w/ caps support
Flex-A-Form rear mono leafs
Suspension Techniques Sway Rear Sway Bar
Hal QA1 Adjustable shocks
Energy Suspension:
-Body/Cab Mounts
-Tranny Mount
-Upper & Lower Control Arm bushings with zerk fittings
-Front and rear sway bar bushings
-Leaf spring and frame shackle bushings
-Front Bump stops
Baer PBR calipers & 12 inch rotors up front
Front & rear drive shaft loops
Firestone SZ-50 EP 245 50 16 tires
Chevy Extreme/SS bed frame crossbrace
Autometer Tranny Temp Gauge
Autometer Boost Guage
ATR Air/Fuel Meter
Sparco Driver Seat
Hella Vision Plus Headlamps
Sylvania Siverstar Bulbs
Hella Micro FF Fog Lams
PIAA Fog Lamp Super White Bulbs
Throttle Body Air Foil
Optima Battery
Kenne Bell Battery Fenderwell Kit
Spare Tire, spare tire mount and jack removed
Click to expand...
Click to expand...
 
HighPerformanceTrucks

HighPerformanceTrucks

Lift & Shift Specialist
I don't know why the posts repeated themselves as I had just edited some of the information twice.

Anyway, I got a response from Top Gun Raceway with the corrected ET.

Here's the reply.

"altitude correction factor at Top Gun is 1.404 giving you aprox. 12.081 at sea level"

-------Original Message-------

From: Ivanko Barbell Company Authorized Dealer
Date: Saturday, March 22, 2003 9:37:13 PM
To: racing@topgunraceway.com
Subject: Altitude correction for Turbo car

Hi,

I ran my GMC Syclone today at your track. I did a best of 12.485 @ 108.456.

What would have my truck run if I ran at a sea level track?

Thank you.

Adam Auerbach
GMC Syclone #2419
 
A

AXXE

Member
There is a local NASTE member that ran 11.98 with a TE-44 on a stock motor. Runs consistent low 12s. We are close to sea level. I think you will do it. Good luck.
 
HighPerformanceTrucks

HighPerformanceTrucks

Lift & Shift Specialist
Here's another interesting response from Top Gun Raceway

"The NHRA gave us that correction factor as a average for all classes including all induction systems. My experience is that actual altitude verses corrected altitude ( air density ) is your biggest factor. We were at a air density of 6200 feet on sat. and I have seen it as high as 9500 feet and low as 2500 feet during the season. A sea level track such as Infinion will have a 0 or as high as 3500 feet depending on air density. giving them a corrected adjustment of 1.305 although they are a zero adjusted track the cars would just run slower that day. You might come to Top Gun when the air is better and pick up 0.200 or when it is worse and go 0.200 slower. This is why we have a average and say our track is 1.404 based off of actual altitude not air density correction altitude.
Never thought you would be a atmospheric specialist did you?
John"

-------Original Message-------

From: Ivanko Barbell Company Authorized Dealer
Date: Sunday, March 23, 2003 11:16:24 AM
To: racing@topgunraceway.com
Subject: Re: Altitude correction for Turbo car

Is that for a normally aspirated or forced induction car?

Thanks again!

Adam
 
You must log in or register to reply here.
Top