Um...uh...this can't be good...., ...anyone wanna see my crack? |
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Um...uh...this can't be good...., ...anyone wanna see my crack? |
naro914 |
Dec 16 2011, 03:01 PM
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#1
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Losing my mind... Group: Members Posts: 2,476 Joined: 26-May 06 From: Charlotte, NC Member No.: 6,073 Region Association: South East States |
So I was having braking issues at our last PCA Club Race - boild the fluid issues. I think the problem was that the front calipers were not releasing from the rotors so it was like dragging the brakes all the time. It's been a long time (never??) since the calipers were rebuilt, and forever for the master cylinder so I decided to do a full brake system overhaul: rebuild all 4 calipers, new MC, new rotors, and new braided SS lines. Other than the caliper rebuild kits, I had all of the other parts already in my spares box, so this was a very cheap, easy winter project.
All that went perfect. So...silly me, I decide to start scraping the undercoating off of the inside of the wheel wells with the idea I'm going to paint them (the old 'While I'm here' conversation we all have in our heads). As I was scraping, I came upon what I thought was a small crack... Nah, can't be, just surface paint crack, right? So I investigated further, and... (IMG:style_emoticons/default/yikes.gif) So...looks like Papa Smurf is getting some welding done (IMG:style_emoticons/default/welder.gif) and a new stiffening kit for Christmas! |
naro914 |
Feb 8 2012, 06:49 PM
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#2
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Losing my mind... Group: Members Posts: 2,476 Joined: 26-May 06 From: Charlotte, NC Member No.: 6,073 Region Association: South East States |
Actually under the car is negative pressure. That's why, at speed, a car with good aero actually sucks down to the ground.
This info is coming from a guy that's spent a lot of time in a wind tunnel... I believe him... (IMG:style_emoticons/default/smile.gif) |
ChrisFoley |
Feb 8 2012, 07:38 PM
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#3
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I am Tangerine Racing Group: Members Posts: 7,926 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None |
Actually under the car is negative pressure. That's why, at speed, a car with good aero actually sucks down to the ground. Under the car is the second best place to dump the air. I know how well it works from the way I set up the oil cooler on my race car. SCCA Prod rules are very strict about not cutting holes in the bodywork and underbody so I had to get creative. My cooler air path is in through one fog light opening (cutting a same size hole in the panel behind is allowed) and out through the little holes behind the airdam. The vertical bumper opening has about the highest pressure of any part of the car and behind the air dam has about the lowest. My oil has never run cooler than it does with the current setup. In cool weather I can cover 1/3 to 1/2 of the inlet and still not overheat. The only downside is the increase in pressure under the car. At the speeds of FProd it wasn't much of a factor though. |
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