Liam's Z4C race car project

Liam22 · Post by **Liam22** » Tue May 31, 2022 4:56 pm

1536Z4 wrote: ↑Tue May 31, 2022 4:44 pm Cant see you anywhere on the qualifying or results . Did you give this one a miss ?

Unfortunately I had to withdraw due to illness. Better now, but still gutted to have missed it

1536Z4 · Post by **1536Z4** » Wed Jun 01, 2022 4:30 pm

Liam22 wrote: ↑Tue May 31, 2022 4:56 pm gutted to have missed it

Health comes first . Glad your better

Vanne · Post by **Vanne** » Sat Jun 04, 2022 8:16 am

Glad to hear your better mate. Spot of Covid?

1536Z4 · Post by **1536Z4** » Fri Jun 24, 2022 4:15 pm

Liam22 wrote: ↑Thu Apr 14, 2022 8:49 pm 25-Jun Clubsport Trophy Oulton Park

Hi Liam,

Good luck at Oulton tomorrow . Tyre choice could fun looking at the weather forecast .

Liam22 · Post by **Liam22** » Fri Jun 24, 2022 7:27 pm

Ha! Thanks. I only brought dry tyres with me so I won't have any difficult decisions to make

Haven't been to Oulton Park for 4 years so I'm looking forward to re-learning it in the Z4.

Mr Tidy · Post by **Mr Tidy** » Fri Jun 24, 2022 8:52 pm

I hope you have a good (dry) weekend.

I'll keep a look out for some video!

1536Z4 · Post by **1536Z4** » Sun Jun 26, 2022 11:54 am

Liam22 wrote: ↑Fri Jun 24, 2022 7:27 pm Haven't been to Oulton Park for 4 years so I'm looking forward to re-learning it in the Z4.

Obviously you have a good memory !! Well done again getting 1st place . I havn`t found any footage yet . What happened to the Seat Leon ?

Liam22 · Post by **Liam22** » Wed Jun 29, 2022 10:37 am

The Leon had a tyre failure after about 10 minutes which gifted me an easy win. However, a 320bhp/420Nm TCR factory race car with sequential 'box is not really fair competition in class A. However, I qualified within 0.8s and led the first lap.

Here's a few, largely uneventful, laps from the race

https://youtu.be/qGhHnvJiqTY

1536Z4 · Post by **1536Z4** » Wed Jun 29, 2022 8:47 pm

Liam22 wrote: ↑Wed Jun 29, 2022 10:37 am not really fair competition in class

Thanks Liam

Wursle · Post by **Wursle** » Mon Aug 01, 2022 12:02 pm

Good to see the car performing so competently on track! It looks alot faster.

Has the car seen a dyno since the milvs?

Maddo6659 · Post by **Maddo6659** » Sat Feb 04, 2023 3:58 pm

Liam22 wrote: ↑Thu Jul 22, 2021 8:00 am Chopped down the video last night.

https://youtu.be/7v9wc0tHJk4

The 'Crilly Flick' around that lotus!

Vanne · Post by **Vanne** » Thu Feb 09, 2023 11:42 am

Hey Liam, just watching you pedal around that track mate, great job... uhmmm.. i get the direct impression that your front end is excessively light? thought increasing the front aero to balance up the rear? (if that doesnt detract too much from your top end) either that, or depending on the front camber your running, increase that a little? exellent car control though

Liam22 · Post by **Liam22** » Thu Feb 09, 2023 10:06 pm

Thanks Vanne. That video is from 2021 and I redesigned the splitter at least once since then.

Front camber is -3.5º IIRC. I get good even temps across the tyre surface, slightly hotter on the outside shoulders, as it should be.

I have a new splitter under construction with a few mods, and more adjustable for angle. Things got a bit simpler since I removed the headlamps

romelitzs · Post by **romelitzs** » Fri Feb 10, 2023 12:18 pm

I'll be running Gaz monotube dampers. Same spec as on the 330 Challenge cars with spring rates from the ZCars series to get me started.

panoramacharter.ltd

192.168.1.1

Liam22 · Post by **Liam22** » Fri Mar 17, 2023 10:15 pm

It's been a while... so a quick update:

Had a terrible time at the BMW Sommerfest / Ultimate BMW Race last August. Showed up to Donington Park with a brand new front spliter, new brake pads and new tyres. Had a nice generous 30 minute qualifying session so spent 10 mins bedding everything in and then sat in the pits for 5 minutes to let the brakes cool a little.

First timed lap had a wobble at the Old Hairpin and skirted through the gravel. Second flying lap, while passing 2 slower cars, the second one moved over on me, pushing me off track at 100mph at Schwantz Curve. That sort of speed straight into a gravel trap does a lot of damage:

• Track rod bent by the impact - replaced both sides, inner and outer
• Front right wheel destroyed - replaced and painted
• Front right wing dented - replaced but the new one is far from perfect
• Headlamp mounting lugs broken - replaced both with new outer shells (no lighting), 6kg saved
• Splitter ripped off (never saw it again) - made another one
• Both wheelarch liners significantly damaged - replaced
• Windscreen smashed by the wave of gravel - replaced with a brand new one
• Radiator holed - replaced
• Brake duct hose ripped off - replaced
• Bumper lower trim ripped off - replaced with ABS plastic to try cooling with just the kidney grill
• Both LHS wheels badly chipped - refurbed
• Serious gravel rash on bumper, lots of stone chips on wings and along LHS - not yet addressed

So there we are. It's been a lot of time, effort, and a fair bit of cash.

And tomorrow the 2023 season starts at Silverstone, on the GP circuit with BRSCC ClubSport Trophy. The car hasn't moved more than a few metres and I've been struggling with MAF error codes and a lumpy idle. Needless to say it's going to be a step into the unknown. Hoping that the new wheel alignment and splitter, and cooling work effectively.

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