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2.5L ITB NC built for TimeAttack (with some goodies)

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Old 10-10-2022, 06:09 AM
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Talking 2.5L ITB NC built for TimeAttack (with some goodies)

Hey guys!
I'm Domi from Germany.

My MX5 is a NC '08, with around 60k km.
The journey started 2017, after I crashed my first, softly modified NC on the road.
After some hospitalization I've found a new NC with my preferred spec:
-2L
-Niseko
-low km
-black
-"near mint"
-rust free

So I started modding again with SPS Motorsport.
Stage I & II (Cams) with ECUTek tune, wheels, coilovers, some other stuff.

2018 was my first trackday, and this was a game changer!
2019 the engine blowed up, so we started the ultimate N/A Build!

Here are some points:

-2,5L Engine completely built, forged, higher cr (15:1), Stage 2,5 cams, milled head, lighter crankshaft, lighter flywheel, dry sump system (tank in trunk), Jenvey ITB with some minor changes
-custom exhaust, AWR engine mounts and engine bar
-Gearbox changed to 6 speed with CAE shifter, shorter Kaaz 1,5way differential
-Liteblox battery, Megasquirt 3, Race Technology Dash 2 with CAN Adapter set (tbd at the moment)
-custom roll bar, Recaro Pole Positions, custom seat adapter (low as possible), 6 point Schroth harness, Momo steering wheel
- JR5 17x8,5 with 235/40AR1; Rota Titan 17x9 with 235/40AR1, BC Racing with changed springs, whiteline sway bars, Stop tech big brake kit

I've sure missed some points, but yeah, that's it for now.
There are still many many ideas tbd.

The car is now mainly used for Track (e.g. German TimeAttack), but is still street legal!

Here is a video of one of the last dyno runs:

A video from SPS about the whole car:

Power output is 300hp and 320nm.
with other cams we could do even more, but would reduce the low end torque.
The car drives perfect with way more punch I would expect from a N/A car, for me it's the perfect NC!

Here are some pics:
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Old 10-10-2022, 06:37 AM
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That car looks and sound fantastic. Since it is a track car, are you going to start adding aero now?
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Old 10-10-2022, 06:40 AM
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Originally Posted by Chilicharger665
That car looks and sound fantastic. Since it is a track car, are you going to start adding aero now?
Thank you very much!

Yes, that's one point;
But I want some removable Aero, because here in Germany you can't drive on the road with some serious aero.
Was looking for something like the 9livesracing Aero kit, maybe some DIY.
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Old 10-10-2022, 02:18 PM
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This car runs fully on an MS3, in case people missed it.
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Old 10-10-2022, 03:16 PM
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Originally Posted by Reverant
This car runs fully on an MS3, in case people missed it.
Yes, why?
Is there any problem?

DBW works, original speedo works, even the original CAN controlled cooling fan works perfect.
Runs like OEM, but was a very hard way haha
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Old 10-11-2022, 08:31 AM
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Originally Posted by domi.arnold
Yes, why?
Is there any problem?

DBW works, original speedo works, even the original CAN controlled cooling fan works perfect.
Runs like OEM, but was a very hard way haha
Yes, and I think Dimitris was on board during that hard way... I think he made a lot of that possible.
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Old 10-11-2022, 09:11 AM
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hahaha, Yes, Dimi and Jan gave everything to make that possible, all day 'n night.
But now it works like a charm.
So thankful, recommendation 11/10.

Is MS not so common in here?

Now I'm about to drop in the Dash 2 with CAN Interface, so there is a small "reunion" with Dimi hahaha
I hope I'm gettin the last bit working.

Last edited by domi.arnold; 10-11-2022 at 09:50 AM.
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Old 10-11-2022, 10:30 AM
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Reverant = Dimi
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Old 10-11-2022, 10:44 AM
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Originally Posted by Zaphod
Reverant = Dimi
lol, okey hahaha, didn't see that comin.
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Old 10-12-2022, 07:15 AM
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Hehe good fun there.
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Old 10-12-2022, 07:44 AM
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Originally Posted by Reverant
Hehe good fun there.
Checked out, you are really supportive in here, I'm glad that SPS used a mslabs ECU

So thankful for your support!
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Old 02-13-2023, 06:46 AM
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Oh, to get things in here up to date.
Dash is installed and works correctly:

CNC'ed a carbon mount and covered with alcantara.

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Old 02-13-2023, 01:00 PM
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Looks sweet! What sort of CNC machine do you have? I honestly had never thought about milling out a carbon plate.
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Old 02-14-2023, 01:42 AM
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3 axis portal with 1150x560x250mm space.
The carbon plate was easy haha, can go steel with this machine.

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