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Shakedown of my 924 Turbo/GT Special

 
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macBdog  



Joined: 16 Aug 2004
Posts: 1111
Location: Brisbane, Australia

PostPosted: Mon Aug 05, 2019 11:02 am    Post subject: Shakedown of my 924 Turbo/GT Special Reply with quote

Took my 924 Turbo/GT Special out for a shakedown run @ Lakeside. Went really well! It's been at least 10 years since I've driven a 924 in anger and all the good memories came flooding back.

It really is such a well balanced chassis and with the full cage it feeds back to the driver amazingly.

https://www.youtube.com/watch?v=k-o98iNNgWA

I was waving the traffic through on the straight as I still have a few leaks and small issues to sort out but very happy with the car, it has plenty to give.



[img]http://charles.henden.com.au/sites/default/files/styles/media_gallery_large/public/20190731_142207.jpg?[/img]


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1979 931 with a 350 chev
1973 911E with EFI
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CÚdric  



Joined: 27 Aug 2004
Posts: 1985
Location: Sweden

PostPosted: Mon Aug 05, 2019 5:59 pm    Post subject: Reply with quote

Nice to see it on track! hows the setup on the rest of the car?
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macBdog  



Joined: 16 Aug 2004
Posts: 1111
Location: Brisbane, Australia

PostPosted: Thu Aug 08, 2019 4:48 pm    Post subject: Reply with quote

Thanks! Setup is still a bit of an unknown quantity, haven't even set the brake bias up. The ride height is stock and it has a set of 20mm spacers for the 250 series tyres.

Front has ground control coilovers and camber plates that read 0 but there is about 5 degrees of negative camber on each wheel so that is a bit of a mystery.

No sway/antiroll solution as yet but I'll address that once the car has seen a bit more track time.
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1979 931 with a 350 chev
1973 911E with EFI
p-talk wrote:
I'm still convinced the word 'Porsche' makes people crazy in all kinds of ways
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macBdog  



Joined: 16 Aug 2004
Posts: 1111
Location: Brisbane, Australia

PostPosted: Tue Dec 17, 2019 10:18 am    Post subject: Reply with quote

Took it out again, this time got a few more laps in, less issues, more speed!

Still all over the place in terms of lines, shifting and camera angles:

https://www.youtube.com/watch?v=uRmVOLpTZV8
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1979 931 with a 350 chev
1973 911E with EFI
p-talk wrote:
I'm still convinced the word 'Porsche' makes people crazy in all kinds of ways
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924RACR  



Joined: 29 Jul 2001
Posts: 8321
Location: Royal Oak, MI, USA

PostPosted: Tue Dec 17, 2019 11:24 pm    Post subject: Reply with quote

Car looks great!

Is it just me, or does the camber actually look wonky in those photos? Front looks like not enough (barely even looks like it has 2 deg), and rear looks positive?

Also looks like it could benefit from more front track - spacers, and/or wider wheels.
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Vaughan Scott
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'79 924 #77 ITB racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype
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macBdog  



Joined: 16 Aug 2004
Posts: 1111
Location: Brisbane, Australia

PostPosted: Mon Dec 23, 2019 1:30 pm    Post subject: Reply with quote

I think you are correct! Will add a few more degrees before next outing. Also noticed the front wheels are on the wrong side (direction arrow round the wrong way)

They are 7" rims on the front, I have some spare spacers but I was worried about running two sets of spacers, this is bad mojo correct?
_________________
1979 931 with a 350 chev
1973 911E with EFI
p-talk wrote:
I'm still convinced the word 'Porsche' makes people crazy in all kinds of ways
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View user's profile Send private message Visit poster's website
macBdog  



Joined: 16 Aug 2004
Posts: 1111
Location: Brisbane, Australia

PostPosted: Mon Jun 29, 2020 9:59 am    Post subject: Reply with quote

Great day out on Saturday at Lakeside for round 2 of timeattack. Fettled around a little the week before and made some sliding window panels inspired by @Vanne - cut on the homebrew CNC. Nothing better than enslaving robots to make parts for you:




Car ran awesome in mid 20s celcius conditions. Thanks for the feedback @924RACR - I chucked -2 degrees camber on the fronts and swapped them so they were on the correct sides (lol) and took my lap time down from 1:24 to 1:13.522 over 39 laps. Couldn't be happier with the day.





_________________
1979 931 with a 350 chev
1973 911E with EFI
p-talk wrote:
I'm still convinced the word 'Porsche' makes people crazy in all kinds of ways
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View user's profile Send private message Visit poster's website
CÚdric  



Joined: 27 Aug 2004
Posts: 1985
Location: Sweden

PostPosted: Mon Jun 29, 2020 6:21 pm    Post subject: Reply with quote

Great to see you out there on the track, and with some great improvements. They respond well to negative camber, ive settled around -3 degrees up front which seems to work best for me on our tracks, cant get any more out of the std adjusters though.

When you get up to full speed with even more track time a set of 8"wheels up front would take the front end to the next level
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924RACR  



Joined: 29 Jul 2001
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Location: Royal Oak, MI, USA

PostPosted: Mon Jun 29, 2020 9:12 pm    Post subject: Reply with quote

Sweet! Looks even better... great progress.
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Vaughan Scott
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'79 924 #77 ITB racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype
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