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The Baby 7 on the Track


scannon

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This past weekend was the Flyin Miata Summer Camp. I trailered the Miata and the Baby 7 to Grand Junction for the weekend. Two days of the four day event were track days. I managed to get about 12 laps with the Baby 7 while a driver's meeting was being held. The Baby 7 manged a 1:45 lap on a .9 mile track. The slowest Miata turned 1:50 and the FTD went to a 400 HP track Miata at 1.03. I was pretty happy with the result and it was a blast.

 

http://i1261.photobucket.com/albums/ii584/scannon929/2014%20FM%20Summer%20Camp/IMG_0770_zps1102bff1.jpg

 

http://i1261.photobucket.com/albums/ii584/scannon929/2014%20FM%20Summer%20Camp/IMG_0798_zps29a6c024.jpg

I also ran the Miata on the track.

 

http://i1261.photobucket.com/albums/ii584/scannon929/2014%20FM%20Summer%20Camp/IMG_1249_zpsce92ebf8.jpg

 

http://i1261.photobucket.com/albums/ii584/scannon929/2014%20FM%20Summer%20Camp/IMG_2229_zpsb8b19a4d.jpg

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If you passed the "broom stick" test, it was a funny looking one. :smilielol5:

 

Straight broomstick test, they just removed my head temporarily while making the test. :D

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I just need to add a little (make that a lot of) lightness to my body to improve the power to weight ratio.

 

51 lb/hp without me, 111 lb/hp with me in the driver seat. I weigh more than the car does, yikes! We had it on the corner weight scales to check out the weight distribution.

 

https://www.facebook.com/flyinmiata/photos/a.10151766601876631.1073741828.175988061630/10152255848821631/?type=1&relevant_count=1

 

64% on the rear wheels empty and 71% on the rear with me in it.

Edited by scannon
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Skip, I know you've used the Butt winch to get into your SV, so what's the technique you used to get in and out of the little guy?:willy_nilly: Tom

Very slowly and carefully. There is a transverse frame member in just the right place on the floor that allows me to use leg power to ease my body into and out of the car. The roll bar and sides of the cockpit provide places for the arms to help. It just takes some time. I have to take off my shoes to drive it so I have no problem stepping on the seat getting in and out.

 

I have to be very careful of the body work, it is thin and soft aluminum. One time I apparently pressed on the rear fender with my fingers while getting out and there are four dimples in the top of the fender.

 

While getting ready to load up the Baby 7 at the end of the final day I accidentally brushed up against the other fender with the front wheel of my truck and crumpled it. There were a bunch of people watching but they were all looking at the clearance of the topper to the overhead door and none were looking at the Baby 7 (which had disappeared from my sight) although two of them were standing along side it. The builder has plans to make fiberglass fenders and I will get a pair of them and have them painted.

Edited by scannon
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What kind of motor (size, type, power) do you have in that little giant?

 

The motor is a mighty Predator from Harbor Freight putting out a ripping 3.5 HP from 100ccs.

 

I have a 212cc Predator on order that makes 6.5 HP which will significantly improve the power to weight ratio.

 

http://www.harborfreight.com/media/catalog/product/cache/1/image/9df78eab33525d08d6e5fb8d27136e95/i/m/image_20780.jpg

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Only 3.5 HP. and you bettered a Miata time. Dang, that low to the ground you must have felt like a rocket! Keep us posted on the effects of the "new, larger displacement engine";)

 

It didn't seem all that fast, I was jonesing for more speed right away. It was fun though.

 

That was the slowest posted time but the slowest best time was 19 seconds faster than the Baby 7. I suspect it was her first time on the track and her first few laps were very cautious as she improved nearly 25 seconds over the course of the day.

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Would a gearing change help with the top end or was aero an issue?

 

We had to gear it lower because the 100cc engine had a hard time getting enough RPM to get into its power range. I think it ran out of power before it hit its 3.2k rev limit. I may be able to go back to the original gearing with the larger engine and hopefully have a higher top speed with a much better low end acceleration.

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