How important is the air dam on an X19

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spiderlady
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How important is the air dam on an X19

Post by spiderlady » Mon Dec 12, 2016 7:42 am

After several years of trying to get this car to run, I think we may have figured a few things out. One thing concerning me is on long straights, the car seems to get real light in the front end, like it's lifting up. The air dam is missing. Will it help or hinder it if I fabricate another one? I didn't know if the air pushing up from the air dam and getting trapped under the hood would make this sensation worse. Thoughts?
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engineerted
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Re: How important is the air dam on an X19

Post by engineerted » Tue Dec 13, 2016 3:55 pm

Here is a simple example that should answers some of your questions. Not an x 1/9 but still all the same. Short answer Yes air dam required to keep the front end down. This will improve drag and improve engine cooling as the lower pressure under the car will help in pulling air through the radiator.

https://hanchagroup.wordpress.com/2013/ ... n-is-best/
1978 124 steet car
1974 124 EProd race car
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friedman
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Re: How important is the air dam on an X19

Post by friedman » Thu Dec 15, 2016 11:01 am

That's a pretty cool chart. For the street, one has to balance a low front spoiler against hitting things. I once nailed a dead squirrel with a very low spoiler on my street X which made for a rather shocking sound. Another issue is raised manhole covers which fortunately I did not hit but cringed going over in a few instances. Obviously for racing not an issue.
Carl in Virginia
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fiatmac
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Re: How important is the air dam on an X19

Post by fiatmac » Mon Dec 19, 2016 8:40 pm

Denise,
Midwest Bayless has three different designs for the X19 for sale on their website. One listed as a racing airdam.

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DeanRees
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Re: How important is the air dam on an X19

Post by DeanRees » Mon Jan 30, 2017 5:43 pm

Denise, some folks might say it doesn't make a difference, but I know when I didn't have one on my '79 it felt exactly as you describe even in some fairly slow speed driving it made a difference. I would highly recommend getting one from Matt if yours is missing.
SimcaBertone66
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Re: How important is the air dam on an X19

Post by SimcaBertone66 » Wed Feb 01, 2017 7:51 pm

The numbers for example # 6 are pretty impressive. I don't think I can go that route for a vintage racing group, , the VRG is having me take off perfectly good 15 inch wheels and run 13's... really too bad that the best aero tuning is rather fugly ..oh well, them the breaks .
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friedman
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Re: How important is the air dam on an X19

Post by friedman » Thu Feb 02, 2017 8:47 am

I'm guessing it's easier to get vintage approved 13" race tires than 13" street tires?
Carl in Virginia
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Re: How important is the air dam on an X19

Post by SimcaBertone66 » Thu Feb 02, 2017 4:30 pm

You are probably correct Carl, 13 race tires by Avon and Hoosier, in a couple of different sizes... and compounds and wets too I think....
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Re: How important is the air dam on an X19

Post by SimcaBertone66 » Thu Feb 02, 2017 4:38 pm

When I first started to time trail the original assault weapon Spider in the 1990's, there were even more 13" race tires available I think the first time I had to car on track it had full slicks, they were used and I think they were used on an open wheel formula car
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