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Motorsports & Track Forum
From Auto-X to Trackday to Racing and Professional Motorsports this is the place to discuss making BMWs fast

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Old 02-12-2008, 10:44 AM   #41
mrshelley
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We have plenty of other work going on that aren't part of a thread. Don't worry, we will post when we make the donuts.
Did you buy a Dunkin Donut franchise?
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Old 02-12-2008, 11:36 AM   #42
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Nice progress! Any ides how much stronger seem welding makes the chassis? Is the M3 chassis stronger from the factor than a standard coupe? I thought I read something about there being more welds or something.

I got Marshall's email, reviewing it today

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Old 02-12-2008, 12:31 PM   #43
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Did you buy a Dunkin Donut franchise?
No, but I did stay at a Holiday Inn Express last night (what?).

Seam welding does make the car stiffer, but it also and maybe more importantly makes it more durable over time, so the car we build now is the same car we have in 5 years of hard use.
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Old 02-13-2008, 12:19 AM   #44
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No, but I did stay at a Holiday Inn Express last night (what?).

Seam welding does make the car stiffer, but it also and maybe more importantly makes it more durable over time, so the car we build now is the same car we have in 5 years of hard use.
Hmm, didn't know that about seam welding making the car more durable over time but it makes sense. So it's just doing like what you pictured at every seam between two piece of sheet metal?
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Old 02-13-2008, 12:23 PM   #45
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Metal that is loaded gets weak over time - chassis(es?) wear out. Yes - the stressed areas are welded every couple of inches - depends on the area in question.
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Old 02-13-2008, 04:40 PM   #46
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When you don't seam weld the chassis, expect to be doing things like this (click the link) when the chassis stress cracks all over the place. Trust me, the last thing I wanted to be doing was this, as I need to keep as much hair as I can (I'm not getting any younger).
this
It only took me 5 hrs to build a jig, reweld the subframe pickup points back in and get it back out on the track. Doing this in the garage at DIS is not the most ideal place to perform this task.

Also, burning hair stinks.
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Old 02-14-2008, 01:04 PM   #47
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Metal that is loaded gets weak over time - chassis(es?) wear out. Yes - the stressed areas are welded every couple of inches - depends on the area in question.
If a chassis is built properly for racing does it still fatigue and wear out? If so is the rate minimal? At what point is a car not worth racing any more? I know old PTG chassis are still highly valued and they must be fatigued to all hell with how much, and how intense the racing they have done is.

Just my random wondering.

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Old 02-14-2008, 02:33 PM   #48
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I finally got a chance to swing over to the shop last thursday and got to sneak a peak at the car. of course its just a nice clean shell right now but if the other cars are any indication, I can't wait to see the finished result. now im going to have to find more reasons to make it over there to watch the progress. hmm, i do need some redline...
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Old 02-15-2008, 02:53 AM   #49
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If a chassis is built properly for racing does it still fatigue and wear out? If so is the rate minimal? At what point is a car not worth racing any more? I know old PTG chassis are still highly valued and they must be fatigued to all hell with how much, and how intense the racing they have done is.

Just my random wondering.

Tim
Seriously, my neighbor does the track prep for a PTG E36 and the way that car is driven as well as seeing it drop down from the built-in air jacks every time. The wheels are about 4 inches above the ground, and when the air line is pulled out, the car just falls. It's kinda funny, and at the same time crazy how it doesn't break the car.

I wonder how many years that car has been racing, I would think over a decade by now...
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Old 02-26-2008, 10:08 AM   #50
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I need my fix! Where are the updates

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Old 02-26-2008, 03:05 PM   #51
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I need my fix! Where are the updates

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Yeah, updates!
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Old 03-11-2008, 07:11 PM   #52
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No updates?
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Old 03-20-2008, 06:48 PM   #53
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Finally getting some work done. Initial pictures of fitting the main hoop in the car:



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Old 03-23-2008, 02:28 PM   #54
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All this work and you have a 135 to prep for the OLOA. Busy winter.

Peter
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Old 03-29-2008, 09:58 AM   #55
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I don't know how many times I've looked at the images of the main hoop, but it amazes me. The fitment is absolutely perfect!

I can't wait to see the rest of the cage.
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Old 03-29-2008, 10:12 AM   #56
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I love threads like this
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Old 04-01-2008, 01:43 PM   #57
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Old 04-03-2008, 04:02 PM   #58
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I continue to enjoy this build...you guys do top notch work!

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Old 04-22-2008, 03:34 AM   #59
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any updates please
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Old 04-24-2008, 03:02 PM   #60
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I think James is concentrating on the 135 build for the One Lap of America. Rumor had him testing @ VIR last weekend. Care to comment James.


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