not a 105 for a change

Started by Colin Byrne, September 20, 2019, 09:05:09 PM

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Colin Byrne

Yea it went well around Winton,  Got 4 Sessions in but it was a very strange day weather wise, Super Hot and Humid and Rained every couple of hours, so kept alternating between Wet and Dry track every session, which made suspension tuning difficult,  had a few issues, main one was some clearance between the sump and the oil cooler, i hadn't noticed a larger cooling Fin on the 3.2 sump, that's fixed now

the small amount of toe in is more about stability and helping the car to track properly, and the car was actually tracked pretty well.  It's got epic turn in and loves a partial brake or lift-off Over steer, as you say a combination of short wheel base and mid engine.  The upside of the short wheel base, is though it does love an OS, it is very easy to catch and bring back in line.

The dampers are 3 way adjustable, so i'll see if i can dial out a bit of the Lift off oversteer,
72' 105 2000 GTV Red (tarmac rally/race car)
74' 105 2000 GTV Blue (road car)
68' 105 1600 Giulia Super White (Not sure yet)
01' Nissan Pathfinder (Tow car/Alfa support vehicle)

Sheldon McIntosh

Quote from: Colin Byrne on January 31, 2022, 02:01:21 PM
so i'll see if i can dial out a bit of the Lift off oversteer,

Harden up.

But seriously, awesome build, and brilliant and inspiring videos.  And very amusing.  Car looks amazing, can't wait to see it.

Interestingly, I watched a vid the other night, a sort of "men and their garages" sort of thing.  This chap had a Stratos rep with a 24V Busso (the LB STR) and a Ferrari F50, Carrera GT, Muira, Ferrari 250GTE, 812, and some others, and they all get driven hard.  When asked which one car he'd keep if he had to, within a heartbeat he said "oh, the Stratos, no question". 

Paul Gulliver

Just amazing Colin. Another great example of what an Aussie bloke can achieve in his shed 
Paul Gulliver
Present
2017 Silver Giulia Veloce
1979 Silver Alfa 116 GTV Twin Spark
1973 Red Alfa 105 2.0 GTV

Past
2013 Giulietta QV
2006 Black 159 2.2 J
1970 Dutch Blue Series 2 1750
1975 Blue Alfetta Sedan 1.8
1981 Piper Yellow Alfetta GTV 2000
1985 Red Alfetta GTV2.0
1989 White Alfa 164
2000 156

Colin Edwards

Tarmac rallying only? 
Can the rear ride height be reduced a tad without impacting on roll centre too much - or would that impact on aero balance too much?
Present
2020 Giulietta Veloce
2018 Abarth 124 Spider
1987 75 3.0

Past
2015 Giulietta QV
2009 159 3.2 Ti Q4
2012 Giulietta TCT Veloce
2006 147 Ti 2 door Selespeed
1979 Alfasud Ti 1.5

Colin Byrne

QuoteHarden up.

Good point!  Cheers mate, glad you enjoyed the vids

QuoteTarmac rallying only?
Can the rear ride height be reduced a tad without impacting on roll centre too much - or would that impact on aero balance too much?
Yea as you lower the rear the Rear Roll Centre location becomes more and more of a problem, The McPherson Strut rear is definitely not the best part of this car,  it's got a super low CG anyway.

They did track a few of them back in the day, but I think you loose the advantages the small wheelbase gives you on a track, it really was designed from the ground up as a rally car
72' 105 2000 GTV Red (tarmac rally/race car)
74' 105 2000 GTV Blue (road car)
68' 105 1600 Giulia Super White (Not sure yet)
01' Nissan Pathfinder (Tow car/Alfa support vehicle)

Colin Byrne

72' 105 2000 GTV Red (tarmac rally/race car)
74' 105 2000 GTV Blue (road car)
68' 105 1600 Giulia Super White (Not sure yet)
01' Nissan Pathfinder (Tow car/Alfa support vehicle)

aggie57

Love it.  Great highlights package Colin, it's been fun following the build.  Well done.
Alister
14 Alfa's since 1977. 
Currently 1973 GTV 2000, 2020 911 C2S MT, 2021 Mercedes GLE350, 2023 Polestar 2 LRDM
Gone......far too many to list

alanm

Congratulations on an amazing, inspiring project!
Like the others, I look forward to seeing in the 'flesh'.
Your expertise gives me an extreme case of car engineering capability envy!
Cheers,
Al.
Present
1987 75 TS Rosso
2001 GTV V6 Nero
2001 156 V6 Monza Rosso
Past
1986 GTV6 Grand Prix
1988 33

Colin Byrne

Some Video of the stratos from this years Targa Tas,

https://youtu.be/ZYpVOEra3q0
72' 105 2000 GTV Red (tarmac rally/race car)
74' 105 2000 GTV Blue (road car)
68' 105 1600 Giulia Super White (Not sure yet)
01' Nissan Pathfinder (Tow car/Alfa support vehicle)

giulia_veloce

Great vid Colin.
Great to see the car out there.
Looks great.
Pity there was no sound.
All your hard work and engineering was worth it.
Well done

Colin Byrne

Bit of an upgrade video on the individual throttle bodies, hopefully more videos to follow soon

https://youtu.be/NOcr2Ca2pQE

72' 105 2000 GTV Red (tarmac rally/race car)
74' 105 2000 GTV Blue (road car)
68' 105 1600 Giulia Super White (Not sure yet)
01' Nissan Pathfinder (Tow car/Alfa support vehicle)

Ascari32

Brilliant video, super description and quality of workmanship top - notch. Five stars from me!

Colin Byrne

New Video!

I broke the Shifter Housing I used (original alfa part) at a track day @ Phillip Island, so I made a new one

out of Aluminimum...

https://youtu.be/k5GeCBSusE8
72' 105 2000 GTV Red (tarmac rally/race car)
74' 105 2000 GTV Blue (road car)
68' 105 1600 Giulia Super White (Not sure yet)
01' Nissan Pathfinder (Tow car/Alfa support vehicle)

Colin Byrne

New Video with some suspension geometry changes!

https://youtu.be/FUUFEYLwkVU
72' 105 2000 GTV Red (tarmac rally/race car)
74' 105 2000 GTV Blue (road car)
68' 105 1600 Giulia Super White (Not sure yet)
01' Nissan Pathfinder (Tow car/Alfa support vehicle)

Colin Edwards

Hi Colin,

Great work on the uprights.  Nice to see they appear relatively hollow.  What are they off?  Or your creation?  Light?

The roll axis is certainly steep!  Not helped by the relatively short wheelbase - and highish rear COG?  No wonder it's a bit of a handful. 

Looking forward to outcome of next test session.

Regards,
Colin.
Present
2020 Giulietta Veloce
2018 Abarth 124 Spider
1987 75 3.0

Past
2015 Giulietta QV
2009 159 3.2 Ti Q4
2012 Giulietta TCT Veloce
2006 147 Ti 2 door Selespeed
1979 Alfasud Ti 1.5