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Old 11-18-2010, 09:34 AM   #176
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so anything new with the car, Sean?

just bumping a thread I enjoy.
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Old 11-22-2010, 05:01 PM   #177
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Nothing new. Looks like probably no changes to the car this year. I may not even run it next year due to other priorities in life.
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Old 11-22-2010, 05:25 PM   #178
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Getting Alexander a kart?!!!
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Old 11-22-2010, 10:35 PM   #179
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Unfortunately no. Sent you a PM on the details.
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Old 11-23-2010, 12:40 AM   #180
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Because auto-x is relatively slow, you can actually get away with some seriously high attack angles and generate significant downforce. I don't recall where I read some discussion on it, but a college team was testing extremely aggressive wing setups on their auto-x car (F-mod kind of thing, not normal car), and they got some really good results and and a surprising amount of downforce even at very minimal speeds. Certain wing profiles work better of course.
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Old 11-23-2010, 08:15 AM   #181
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Quote:
Originally Posted by Back Road Runner View Post
Because auto-x is relatively slow, you can actually get away with some seriously high attack angles and generate significant downforce. I don't recall where I read some discussion on it, but a college team was testing extremely aggressive wing setups on their auto-x car (F-mod kind of thing, not normal car), and they got some really good results and and a surprising amount of downforce even at very minimal speeds. Certain wing profiles work better of course.
Formula SAE...Sean is familiar with it.

There are some wild aero setups running in there but most, like my team, we could never reason the additional weight, drag and cost of the aero and it was ruled out for us. We always stopped with an undertray at most.
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Old 12-22-2010, 12:57 AM   #182
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Some things have been looking up and I'm planning on running the car next year again. Some progress is being made in a few areas.



Bracket for the new lightweight alternator being fabricated.



Bracket basically done. 5.5 pounds saved off the top of the front of the car.



A few other things being worked on.

Additional changes for this winter are on the drawing board, literally. Hopefully when all is done for the year I'll be a bit lighter and better balanced. Moment of inertia, weight, and suspension geometry is what it's all about. Power- maybe next year.
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Old 12-22-2010, 11:22 AM   #183
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what alternator is that?
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Old 12-22-2010, 12:10 PM   #184
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Denso 8162. It's a bit of custom fit up work to get it to fit, including getting a custom pulley made.
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Old 12-31-2010, 04:55 PM   #185
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Bump for more updates. Is that a rear mounted radiator? What kind of setup do you have to increase flow to the rear of the car?
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Old 01-01-2011, 12:46 AM   #186
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I like the repurposing of the back seat crossbar. What's the application of that alternator? I'm 99.9% sure my car will not be in FSP this season, which means I have ALOT of work to do to get it near your level of prep. Not going all the way to XP though.....gonna try FP first, with a high compression EJ25 or an H6. 1900lb minimum weight sounds like fun with an estimated 220-230 WHP.

Jay
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Old 01-01-2011, 04:18 PM   #187
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I have no idea what the alternator was meant to fit in. The back seat crossbar was about the right size material and has been lying around for a few years. If you are going to FP, try the Goodyear slicks. I am going to try a set this year once I wear out last years old tires. Supposedly they are stickier, cheaper, and have a longer competitive life than the Hoosier slicks.

I am moving the radiator to the rear to help weight balance. The 63% front weight bias I had last year was killing me. Moving the radiator from the stock location to the rear will drop the front weight bias to about 60%. Other changes I'm making will improve that further. As far as airflow to the rad, I'm going to work on some ducting to make sure it's getting cool inlet flow and is exhausting to the exterior of the car. With 2 fans setup to run almost full time it should provide enough cooling for an autoX course.
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Old 01-01-2011, 04:44 PM   #188
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Sweet. I really like rear mounted radiators like the Team Orange drift cars and Zen Performance time attack car, if it was more practical I would run one on my street car.
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Old 01-01-2011, 11:32 PM   #189
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Quote:
Originally Posted by Storm View Post
I like the repurposing of the back seat crossbar. What's the application of that alternator? I'm 99.9% sure my car will not be in FSP this season, which means I have ALOT of work to do to get it near your level of prep. Not going all the way to XP though.....gonna try FP first, with a high compression EJ25 or an H6. 1900lb minimum weight sounds like fun with an estimated 220-230 WHP.

Jay
I am intrigued by your ideas. May I subscribe to your newsletter? :twisted:

My FP build is finally undergoing serious effort again over the next couple weeks. EVERYTHING is out of the car except for subframes, fuel, and suspension, since those things are finished.
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Old 01-03-2011, 12:25 AM   #190
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Quote:
Originally Posted by BAN SUVS View Post
I am intrigued by your ideas. May I subscribe to your newsletter? :twisted:

My FP build is finally undergoing serious effort again over the next couple weeks. EVERYTHING is out of the car except for subframes, fuel, and suspension, since those things are finished.
he he he.....I think we'll be discussing many things my friend!


Jay
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Old 01-03-2011, 03:20 PM   #191
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So looking at the steel for your alternator bracket... and it being painted the color of the car in spots.... i'm gonna guess, Trunk Bracing?
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Old 01-03-2011, 08:16 PM   #192
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I'd almost guess that material was the hinge bars for the trunk...
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Old 01-03-2011, 11:54 PM   #193
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Quote:
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I like the repurposing of the back seat crossbar.
I think it's this.....
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Old 01-03-2011, 11:55 PM   #194
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I wouldn't be able to muster much argument if somebody said they're the same size square tubing.
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Old 01-04-2011, 08:50 AM   #195
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Quote:
Originally Posted by Storm View Post
I think it's this.....
good call Jay...I must have missed that post and I guess most of the trunk material is crush bent anyhow.

Details anyway. It's thicker than 0.5"x.035" chromoly round, so it ways too much anyhow <---some amazing properties for basic material by the way
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Old 02-20-2011, 09:45 PM   #196
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Yo SpeedyHam....how light did you get down to when everything was stripped and prior to putting stuff back in? I think I'm in the ballpark, but need to balance things out back.

We weighed my car this weekend. It came in at 1935lbs, then we removed all the tools left inside for a weight of 1920.
It was sitting on forester wheels/tires and stock shocks/springs. had a motor/trans and half the OEM driveshaft in it, but didn't have a fuel system, electrical system or seat/harness.

The goal is 2050 on a minimum weight of 2027 (thanks to the 2457cc of an EJ25 before boring).

Thoughts? (sorry for the hijack!)

Jay
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Old 02-22-2011, 03:36 PM   #197
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Wow, it has been a long time since I looked at this thread. You have come very far. Car looks like a blast.
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Old 03-04-2011, 11:19 PM   #198
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Quote:
Originally Posted by Storm View Post
Yo SpeedyHam....how light did you get down to when everything was stripped and prior to putting stuff back in? I think I'm in the ballpark, but need to balance things out back.

We weighed my car this weekend. It came in at 1935lbs, then we removed all the tools left inside for a weight of 1920.
It was sitting on forester wheels/tires and stock shocks/springs. had a motor/trans and half the OEM driveshaft in it, but didn't have a fuel system, electrical system or seat/harness.

The goal is 2050 on a minimum weight of 2027 (thanks to the 2457cc of an EJ25 before boring).

Thoughts? (sorry for the hijack!)

Jay
I've never weighed my car with everything stripped out of it. The minimum I've run at an event with enough gas to make it around the course was 206x.

Seat and harness are about 30 lbs, fuel system is about 40 (unless you are going with a fuel cell), electrical system is around 15-20 depending on your choice of wire sizes, fuel is dependent on if you are running a fuel cell. I figured out last year I had 63 pounds of fuel essentially ballasting the rear of the car, below that level in the tank I couldn't get through a course without fuel starve.

You should come out pretty close to 2050 depending on fuel level.

I'm aiming for a bit lower than that for this year.

We'll see how it turns out.

Yes, the alternator bracket was previously the rear seat cross bar. I've been thinking of remaking it out of Aluminum for an extra few ounces of weight savings...
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Old 03-06-2011, 11:33 AM   #199
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so how much weight do you have to remove? before minimum weight that is?

can't remember the formulas for the various classes with turbo is 'x', awd is 'y', etc..
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Old 03-06-2011, 11:57 PM   #200
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Currently 1900 lbs is my minimum weight for XP. I'm starting to get pretty close, but $$$ is the big limitation right now.

On the list of things to do for added lightness are:

Carbon Fiber doors, Driveshaft, trunklid, rear bumper, tail lights, intake.
Aluminum 4pot/ 2pot brakes (probably Willwood's).
Lighter driver's seat and mounting brackets.
Lighter suspension bits- more than likely custom one off units made by me.
Engine internals? This may be stretching it a bit, but there isn't much weight left to be removed.

If I did all of those items I'd be well under 1900 lbs with a full tank of fuel ready to go, so I'd have to add ballast where I need it, like in the rear passenger area to even out the weight balance.
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