Liam's Z4C race car project

enuff_zed said:
Didn't miss the yellow Lotus by much! Was that what they SC'd it for?
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Yes, it must have broken a rear hub or rear toe link when it left the track as one of the rear wheels was showing "extreme camber" the next time I saw it. In hindsight I should have waited to see if the car had recovered or was stranded before pitting. Although it didn't cost me any positions, I could have had a cheaper pit stop if I had waited another lap. At the time there was less than 4 minutes of pit window remaining and (unusually) I didn't want to cut it too fine.

1536Z4 said:
Any thoughts on what new tyres you are going to go for ?
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I'll get another set of Nangkang AR-1. They only seem to cope with 6-7 heat cycles, but that'll see me through the rest of the season.
 
Thanks for posting that video Liam - I really enjoyed watching it. :thumbsup:

Shame how it worked out, but thankfully you managed to avoid other people's errors!
 
Great vid mate, I really enjoyed that. :thumbsup:

I am starting to wonder about the abs, weather to keep it, or just to give it away..

Car looks to be pretty well sorted now Liam, great job on that mate, and looks like your having a lot of fun. I can't wait for temps to come below 40 here so we can get started on getting ours sorted.
Cheers again, and thanks for the shotgun on the way around. :thumbsup:
 
Had a better outing at Silverstone International. P3 and fastest lap, but should have been an easy win.

https://youtu.be/fjR2_lro0Fc
[youtube]fjR2_lro0Fc[/youtube]

After replacing the brake pads and bleeding again the brakes were fantastic. I'm just gonna be rely careful and only disable the steering angle sensor when on track.

I now have a leaky driveshaft. Keeps popping out of the diff by 10-15mm. Hoping it just needs a new snap ring.
 
Wow how unlucky.......one more lap eh?
Tbh the 'success penalty' may not help you but it makes for good spectating.

Impressed how much faster the brakes made you. If it hadn't been for the yellow roadblock for those few laps you'd have won it surely?

Been looking but can't find tables to see how you're faring overall.
 
Liam22 said:
Had a better outing at Silverstone International. P3 and fastest lap, but should have been an easy win.

https://youtu.be/fjR2_lro0Fc

After replacing the brake pads and bleeding again the brakes were fantastic. I'm just gonna be rely careful and only disable the steering angle sensor when on track.

I now have a leaky driveshaft. Keeps popping out of the diff by 10-15mm. Hoping it just needs a new snap ring.
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That spin near the start must have made you clench :rofl:
 
Definitely another close call in the earlier laps with the spinner and so close at the end . :driving: :thumbsup:
 
Liam22 said:
I now have a leaky driveshaft. Keeps popping out of the diff by 10-15mm. Hoping it just needs a new snap ring.
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Got around to looking at this today. Unfortunately it's a right pain to remove the diff output flange:

1. Remove diffuser
2. Remove pull rod
3. Remove exhaust
4. Disconnect driveshaft from output flange
5. Disconnect damper lower mount
6. Disconnect upper wishbone from upright
7. Remove rear anti roll bar

And then remove the diff output flange!

20210901_172629.jpg

As suspected, the snap ring was deformed and not holding the driveshaft in place.

20210901_173821.jpg

Refitted as above and then topped up the diff oil. Needed more than I expected so the diff has run for a while with probably insufficient lubrication/cooling. Bugger. Let's hope it holds out.
 
Hi [ref]Liam22[/ref], just checking, are you still heading to Snetterton in October?
Sunday 10th seems to ring a bell?
 
Short update.

Final Roadsports race of the year last weekend. Back at Snetterton for the second time this year, and still carrying 10s success penalty. I had some great advice from a member on here about modifying the front splitter for a bit more front downforce. Car felt good in qualifying but didn't manage to put a proper lap together. Qualified 2nd in class B with quite a big gap to P1.

The race was better. Took the class lead at turn 2 and pulled out >10s gap before the pit stops. Kept the lead and took another class win with fastest lap, and set a new lap record for class B 8)

https://youtu.be/tyP_Mg0yl_Q
[youtube]tyP_Mg0yl_Q[/youtube]

You can see the splitter mod in this photo - vertical fences in front of the wheels.

fit=2040x2040 (1).jpeg

You can also see that I'm missing a kidney grill.

20211016_155930.jpg

Accidentally tapped a Porsche Cayman with epic turbo lag, as it failed to accelerate out of Oggies. The bumper took a bit of damage so removed it for repairs. Good job I did because otherwise I would not have noticed the coolant expansion tan is leaking. I'm going to assume it's the usual problem, so a new tank on order. Appears to be leaking from the lower heater connection. Where is the usual leak source?

I have one more race this year - BRSCC Clubsport Trophy at Anglesey supporting the Race of Remembrance in November.
 
Well done Liam, as it turns out I couldn't have made it anyway.
Shame as it seems you had a better day this time round.
So where do you stand in the results table for the year then?
 
enuff_zed said:
So where do you stand in the results table for the year then?
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Roadsports is just a series - no points, no overall winner.

Silverstone National: 1st
Brands Hatch: 1st (10s penalty)
Snetterton I: 5th (20s penalty)
Silverstone Intl: 3rd (10s penalty)
Snetterton II: 1st (10s penalty)
 
Good to see you continuing with success and the Z continuing with improvements . What are your plans for next season or is it too early to say ?
 
Liam22 said:
enuff_zed said:
So where do you stand in the results table for the year then?
Click to expand...
Roadsports is just a series - no points, no overall winner.

Silverstone National: 1st
Brands Hatch: 1st (10s penalty)
Snetterton I: 5th (20s penalty)
Silverstone Intl: 3rd (10s penalty)
Snetterton II: 1st (10s penalty)
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Well that will explain why I couldn't find it then. :roll:
Pretty good list there though. Well done.
 
Liam22 said:
I have one more race this year - BRSCC Clubsport Trophy at Anglesey supporting the Race of Remembrance in November.
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When is that? I may be on the island at the time, so if the weather is half decent might pop over.
 
Good results mate, nice job. Good to see your continued development of the car.
Can't wait to see what you do next season. :thumbsup:
 
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