RA64 Celica build

[YotaFun]

I'm working at the wrong dealership...
I barely break 40, even working a Saturday...

I need to start pounding pavement and find myself some work

[CJM]

Wowza its coming a long way! Seems once you fix one thing, 5 more crop up tho. Least thats how it goes for me lol.

@Avy, that sucks-but at least you dont hate your job.

[corax]

Wowza its coming a long way! Seems once you fix one thing, 5 more crop up tho. Least thats how it goes for me lol.

I think it's more likely that I'm just finding the bugs that the PO ignored. I drove it to work today and the CEL didn't come on once, so, even more progress - kinda seems like the more I drive it the better it gets, to a point.

[CJM]

I think it's more likely that I'm just finding the bugs that the PO ignored. I drove it to work today and the CEL didn't come on once, so, even more progress - kinda seems like the more I drive it the better it gets, to a point.

Thats pretty much how things go when you buy used. Some take care of things, others just let them go and dont care. Ive been in cars I dont even understand how a person could stand to drive it b/c it was so bad. Its like how do people ignore the screeching of bad brakes?

[corax]

Still working on it. Today though I took it up the highway to the state truck weigh station to get front & rear axle weights (scales work & display even when the station is closed). Front axle is 1450 lbs, rear is 1150 lbs for a total of 2600 with 1/4 tank of gas in it.


I also decided to take some measurements of air pressure acting on the body. I used a 0"-5" Magnehelic pressure differential gauge & all measurements used cabin air pressure as an atmospheric pressure reference.

Here are the links I usually like to give when talking aero refinement - they discuss using wool tufts and directly measuring pressure with a differential air gauge. (BTW, Autospeed has some pretty damn good "real world" tech articles)
- Aero Testing - Part 1 Aero Testing - Part 2 Aero Testing - Part 3 Aero Testing - Part 4 Aero Testing - Part 5
- Modifying Under-Car Airflow, Part 1 Modifying Under-Car Airflow, Part 2
- Undertrays, Spoilers & Bonnet Vents, Part 1 Undertrays, Spoiler & Bonnet Vents, Part 2 Undertrays, Spoiler & Bonnet Vents, Part 3
- Blowing the Vortex, Part 1 Blowing the Vortex, Part 2 Blowing the Vortex, Part 3 Blowing the Vortex, Part 4

Here's what I came up with (yes, engine and trans placement is a bit off in this pic - I didn't draw it):


Negative numbers indicate vacuum, positive are pressure - so negative is lift if it's on the top off a surface, positive downforce. You could pretty much draw an arrow on the end of the line farthest from where it touches the body. The lines approximate magnitude: a longer line indicates more pressure/vacuum. Each measurement was taken 6 inches apart on the body down the center line. So the first measurement is the corner right where the hood transitions to horizontal, the next measurement is 6" behind that.

I noticed a couple interesting things. Notice how the high vacuum area right at the very leading edge of the roof line creeps down the windshield a bit? It's nothing of consequence, but I didn't really expect to see that. Trunk lid pressure with & without the MR2 wing stayed fairly consistent, no real pressure build up as I expected. Also, pressure on the top and bottom of the wing section almost cancelled each other out - though it should be noted that ALL readings were at 50 mph and air flow may change to make the wing more or less effective at higher speeds, I'm also not sure if pressure readings on a wing are entirely accurate (due to how they operate).


[img width=800 height=600]http://www.ultimatecarpage.com/images/large/3263/Toyota-Celica-Twin-Cam-Group-B_2.jpg[/img]
LOVE this Group B wing and it doesn't seem like it'd be very difficult to fiberglass up (minus the vent through the middle). After seeing the data from my own wing testing I may have to add another project to my ever growing list . . . maybe using a late 70's Camaro/Firebird spoiler as a starting point

[Seanz0rz]

way cool Keith! I want to try that on my VW when/if I get it running!

a few weeks ago I saw a very old lady driving a VERY mint Celica. Probably has only been driven to the grocery store and doctors since the 80's. Paint looked brand new, it was super clean. Made me want one even more!

[corax]

way cool Keith! I want to try that on my VW when/if I get it running!

When it comes time, if you want to borrow the gauge just let me know

[Obi..]

I keep looking at this page lately b/c of this thread http://www.autoblog.com/2012/03/08/w...hrough-its-pa/

[corax]

That's a good video, but what do you really expect from the Aussies? Give them something internal combustion and they're bound to exceed expectations . . .

BTW, there is some real Celica Group B porn is in these restoration pics: Makela Auto Tuning 1984 Toyota Celica Turbo #TC35 or Makela Auto Tuning 1984 Toyota Celica Turbo #TC18

[Obi..]

Cool, thanks. *WTF w/ pics 7, 13, etc, is that a car or a fiberglass and plastic boat? Stuff's over 1/4" thick in places? Did they lighten it up so bad they needed to add the weight back in?

EDIT: Nevermind, I remember now, they rolled that in '94 or '95 IIRC? That amount of bodywork just to save a historic vin#, I dunno.

Search by VIN or Frame #:JT1CBTA6400000261

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