🚀 tezzasaurusrex - Time Attack FL5 Build Journal

[tezzasaurusrex]

Hi all,

This thread will serve as the build journal for my FL5. The car will be moderately modified with the aim to upset higher hp cars on track (namely BMW's) however also serve as a reasonably comfortable road registered vehicle that I can drive daily.

Currently, the modifications are as listed (*updated* Nov 2025)

Engine:
Stock
Motul 0W30 8100 Eco-Clean for street duties
Motul 5W30 8100 Power for ethanol/track use

Turbo:
MHI stage 2

Fueling:
Hondata 1530cc injectors
Full Race HPFP
AEM drop in LPFP

Cooling:
OEM radiator
HKS intercooler with HKS piping kit

Transmission:
Stock Gears
Spoon Mechanical LSD
Motul Gear FF Type 2

Brakes:
Project MU brake pads + Paragon 2 PC discs FR and RR
Motul RBF700 Fluid

Exhaust:
Invidia Catless with hardlagging
Fujitsubo 70mm Front Pipe
Stock with centre (larger) resonator deleted
Hondata mapped flap to always open in engine R mode

Suspension:
Tein Mono Racing 14/12KG Springs
Hardrace FK8 Front Camber Balljoint w/ custom made camber shims, strut pin removed and strut top positioned to max negative.
Eibach Rear Upper Camber Arm
Hardrace rear knuckle Spherical (B arm)
Hardrace hardened rubber Front LCA bushing (rear position)

Alignment:
Camber FR -4°, RR -3° (was -2.7°, -2°)
Combined Toe FR 0mm, RR +3mm (was 0, +2mm)

Body/Aero:
Rear Wiper Deleted
Custom Carbon/ribbed core front splitter with tunnels and end plates, completely curved underside.
Voltex Type 2 rear wing
Front brake ducts blocked off

My fastest lap times currently at various circuits are:
Sydney Motorsport Park GP 1:46.01 (LogR) (Note: Completely stock car only with wheels and tyres)
Winton Motor Raceway Full Circuit 1:34.88 (Natsoft) (Note: Stock springs, FK8 Ball Joint)
Luddenham Raceway 51.9 (LogR)

Update April 2024
Sydney Motorsport Park GP 1:44.44

Update September 2024
Sydney Motorsport Park GP 1:43.95

Update Jan 2025
Sydney Motorsport Park GP 1:42.780
(Main delta has been the extra power from bolt ons and Jester's tune, netting an extra 10kph at the end of Brabham Straight, and further tweaks to suspension, alignment, set up)

Update Nov 2025
Sydney Motorsport Park GP 1:39.865 (WTAC) on Yokohama AD09 (Control Tyre)

I will keep this thread updated as best as possible with modifications and speed secrets that I discover along the way. The aim is to knock those pesky BMW's off the top of the time sheets.

 

[CTR]

I'm excited to follow your build. You seem super knowledgeable about setting up a track car that's still practical. Thanks for sharing so much already!

 

[Midori Garage]

Im curious about the rear spring shim. I haven’t seen a reverse rake before with Spoon springs.

 

[tezzasaurusrex]

I'm excited to follow your build. You seem super knowledgeable about setting up a track car that's still practical. Thanks for sharing so much already!

Thanks for your kind words. Gone are the days where I would turn a car into something so extreme that I can't enjoy driving normally. I want the speed, and I want the practicality. ?

Im curious about the rear spring shim. I haven’t seen a reverse rake before with Spoon springs.

I would say every FL5 fitted with Spoon springs are exhibiting around an 8-10mm reverse rake (rear being lower) if it were to be measured on a perfectly level surface. I'm still currently working with a fabrication shop to make them sit perfect in the body recess, as the surface is not perfectly flat.

 

[Midori Garage]

id be interested in buying a set. Ill know once my springs settle more.

 

[keller]

Have you calibrated your ride height sensors after lowering the car? Most FK8 people didn't bother doing it, but our suspension is not that overdampened from factory.

BTW, can you post onboard videos of your track outings? I could bet I'm not the only one that enjoy watching those =)

 

[tezzasaurusrex]

Have you calibrated your ride height sensors after lowering the car? Most FK8 people didn't bother doing it, but our suspension is not that overdampened from factory.

BTW, can you post onboard videos of your track outings? I could bet I'm not the only one that enjoy watching those =)

I have not, but it would be a good thing to do for sure!

Here's some videos on my youtube channel



-
A good one making an NA K series sing

 

[keller]

??? that corner with the EK. Loved it!

 

[tezzasaurusrex]

??? that corner with the EK. Loved it!

haha foot was burried into the gas pedal ?

 

[UJX]

Do you have a rear camber kit installed? I have a set of Spoon springs but haven't installed them yet and was wondering what kind of camber the rears would be at after the drop. Ideally I'd like to have both front and rear around the same as I don't track the car as of yet.

 

[OsosikMedia]

sik! Australia has some nice tracks!!!

 

[tezzasaurusrex]

Do you have a rear camber kit installed? I have a set of Spoon springs but haven't installed them yet and was wondering what kind of camber the rears would be at after the drop. Ideally I'd like to have both front and rear around the same as I don't track the car as of yet.

Running stock arms. Rear camber went from -1.3° to around -2° after installing the Spoon springs (depends on fuel load).

If you pull the front strut pins out you'll be at around -1.8° which should bring front to rear reasonably close. However I always prefer to run more front camber so I'd recommend getting the camber adjustable front ball joint regardless.

 

[keller]

Have you tracked your car with the stock wheels? Have you noticed any difference in handling when you increased both track widths by 30mm due to the different wheel offsets?

 

[tezzasaurusrex]

Have you tracked your car with the stock wheels? Have you noticed any difference in handling when you increased both track widths by 30mm due to the different wheel offsets?

I haven't - as I intend on keeping the stock tyres in ideal condition for normal street driving. But I am running 20mm spacers under the stock wheels at the moment on the road and I can't say there is a huge difference in handling between ET60 and effectively ET40. Perhaps a tiny bit extra torque steer but nothing too significant.

 

[albi]

Body: Rear Wiper Deleted

What kit did you use for the rear wiper delete? I did not notice it in the pics or vids but may have overlooked it.

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