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-   -   How much is good air worth? (https://classracer.com/classforum/showthread.php?t=50642)

Ed Wright 12-01-2013 12:49 PM
Re: How much is good air worth?
 
Quote:
Originally Posted by Todd Geisler (Post 410825)
I used a wide band o2 system with my data logger for 3 or 4 seasons. Removed it and sold it to a friend, still being used today with the same sensor and lead racing fuel the entire time.
I replace mine each season just to be safe. Street cars get a lot more run time than a race car. It will cause O2 issues in a daily driver.

Dave Casey 12-01-2013 07:24 PM
Re: How much is good air worth?
 
Quote:
Originally Posted by Todd Geisler (Post 410668)
I'm wondering if D/A is simply not D/A and comparing isn't as accurate as I once thought.

Tested at MIR on Oct 20th.

1.136 60'
3.227 330'
5.011 660'
137.22 mph

58.6 deg
57% humidity
29.82 barometer
354' D/A
42.50 grains

Now at a race at Cecil on Nov 2nd

1.136 60'
3.221 330'
5.002 660'
137.25 mph

57.4 deg
55% humidity
29.29 barometer
851' D/A
39.14 grains

The very next run at Cecil the car set the class record for an N/A car of 4.988.

I sit here comparing weather and at Cecil the barometer was way lower and higher D/A but the car still ran quicker. Scratching my head over this as when I looked at the weather station every run I expected the car to run slower than it had at MIR based on the air.

And I never did get to run in what I feel is mineshaft air this fall. Probably a good thing as I got hit with 50 lbs for running what it did. lol
Gets back to what I said, I think you are going DOWNHILL at Cecil, just like 4 wide/concord, simply put, the startingline elevation is higher that the finishline elevation

ron mattson 12-02-2013 03:04 AM
Re: How much is good air worth?
 
Any of the Coastal good air tracks are at least
3/10 quicker than brainerd!!! Lololol

Dan Fahey 12-02-2013 02:00 PM
Re: How much is good air worth?
 
Todd:
Cecil usually has a mild tail wind.
Did you check wind direction?

Ed:
Regarding O2 Sensors..
For some reason the Left Failed.
Replaced both and saved the good one.

The SS uses 93 Octane.
Couple racers prefer Shell over Sunoco.
Need to know more..why?

At Mason Dixon Dragway can get 100 Octane Sunoco.
When the car is right the 100 Octane is not needed.

Wondering if tuning to 100 octane would be helpful?

Ed:
What do you think about running 100% gasoline vs the Street Fuel?
D

Ed Wright 12-02-2013 03:18 PM
Re: How much is good air worth?
 
[QUOTE=Dan Fahey;410938]Todd:
Cecil usually has a mild tail wind.
Did you check wind direction?

Ed:
>Regarding O2 Sensors..
>For some reason the Left Failed.
>Replaced both and saved the good one.

>The SS uses 93 Octane.
>Couple racers prefer Shell over Sunoco.
>Need to know more..why?

Probably not grounded in fact. Unless both have a refinery close by, they both come from the same place. We have two local, one Sunoco, other is Holley. All fuel around here comes from one or the other. I have customers from both places. They tell me everybodie's of a given octane comes out of the same storage tanks.


>At Mason Dixon Dragway can get 100 Octane Sunoco.
>When the car is right the 100 Octane is not needed.

>Wondering if tuning to 100 octane would be helpful?

Might like a degree or two more timing. Just have to test that.

>Ed:
>What do you think about running 100% gasoline vs the Street Fuel?

D [QUOTE]

We have.100% pump gas around here. Stations offering that get a few cents per gallon more. I don't run that E-anything unless I just can't find anything else. The difference in mileage almost pays the difference, and I don't like running that crap through my stuff that crap is only a good deal for the corn farmers. If you have to burn more of it to go the same distance, I don't see the big advantage. I think EPA is about to learn that also. About 2 MPG difference in my wife's Lexus.

gbur 12-08-2013 02:04 PM
Re: How much is good air worth?
 
Quote:
Originally Posted by Dave Casey (Post 410870)
Gets back to what I said, I think you are going DOWNHILL at Cecil, just like 4 wide/concord, simply put, the startingline elevation is higher that the finishline elevation
Humidity however slight in change is a factor


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