TTR's GT86 Track Car

[TTR46]

Don't see much GT86 representation over here so I thought i'd post up a build thread of my track focused GT86!

Here are the modifications so far:

Engine/Exhaust:

Forged Carrillo Rods and Pistons

AVO Stage 3 Turbo @ 22psi

Aquamist Water-Meth injection

AVO 3" Turbo back exhaust

AVO 3" exhaust

AVO Intake kit

Racer-X Oil pan

AVO Oil Cooler



Suspension/Chassis/Wheels:

Öhlins R&T Coilovers (6/6 Springs)

Every Summit brace/SWAVE control arm you can imagine

Whiteline Front 20mm Roll bar

Whiteline Rear 16mm adjustable roll bar

Work Emotion CR Ultimate wheels (18x9.5 ET38)



Brakes:

Front Stoptech 330mmx28mm BBK w/DS2500 Pads (Sidenote, DS2500's are utter ste)

Rear Stoptech discs w/Ferodo DS25000 Pads



Oily bits:

Stock Final Drive (4.1)

Carbon Prop Shaft

600hp driveshafts

Kaaz Super Q LSD 1.5 way

Helix Ceremetallic Clutch

Whiteline Gearbox Insert



Exterior:

Seibon TA Style Front Lip

Buddy Club Rear Carbon Fibre Spoiler with High Support Legs

TRD Front Canards

Beat Sonic Shark Fin Antenna



Interior:

Cusco 6 Point Dash Escape 2 Roll Cage with padding

Steering Wheel Boss

Sparco R325 Suede Steering Wheel

Sparco Evo II Bucket Seats

Sparco 6 Point Pro Racer Harnesses in Blue

Buddy Club Seat Rails

Custom Harness Bar

---

It's a pretty mean piece of kit at the moment, but there are definitely a few bits I want to change and sort out!

So the plan is, in no particular order:

LOTS of paintwork correction (the amount of swirl marks on this car are f***** grim )
Replace headunit so I can run Torque to monitor IAT's/Oil temp/Oil pressure etc
Work Emotion D9R's in 18x8.5 for track wheels/tyres
Rexpeed Carbon sideskirts
AP Racing CP9040 Brake Kit with 355mmx32mm discs (330mmx28mm just aren't cutting it on track)
Get some of the interior back in/add some sound deadening.
Possibly some type of vented bonnet depending on track temps.
New steering wheel (not a fan of alcantara/suede on touchy bits)
A Functional front splitter to get rid of my high speed understeer


Soooo yeah. I love this car

Unfortunately though, it's currently undergoing an engine rebuild due to a piston blow by issue. Should be back up and running early Feb in time for some more track action this year!










Onboard laps from PHSS Silverstone in October - https://youtu.be/6lK-Y_I7C2g

Edited by TTR46 on Tuesday 16th January 10:19

[TTR46]

chrismc1977 said:

Not an obvious choice of track car given the standard engines are known to be fragile & somewhat down on power for the application.....

This ones actually turbocharged, pushing out about 400hp. However that being said, I have a stock Subaru BRZ that I've taken on 6 track days on road tyres and I can count on one hand the amount of times I've had to let somebody by because they're faster.

All this lark about them having not enough power is because most people can't actually drive fast! I just bought this 86 because it makes it easier to overtake M3's that don't like to get out of the way on the straights

There are also countless people running decently engineered forced induction kits around the 280hp-300hp mark on standard internals, tracking without issue.

I dare say you've been misinformed

[TTR46]

marcella said:

Awesome build.

I am seriously looking at a BRZ this year and making it a bit more track focused but it will be a daily driver also so need to keep a good balance. Love the idea of these cars, I want to do some engine mods but try and keep it NA if I can.

How do you find the Ohlins? They are on my wish list if I get one.

My other option is completely different being the mustang GT, got a craving for a muscle car too so I'll need to decide which way to go.

Thanks dude! The Öhlins are absolutely awesome. Best modification on the car. It's a weird sensation when you first put them on. They're weirdly supple, but have such incredible body control. Couldn't pick a better set of coilovers for road and track use! If you're sticking with N/A, I would definitely recommend a new manifold and a remap! Makes an incredible difference

I would love a Mustang, but.... For the same price you could have a BRZ that would be faster in a straight line (if that's your thing) and certainly better in the corners!

[TTR46]

Chapppers said:

Yeah they're cool cars but I don't see the point when you can just chip a Fiesta ST, which is £5k cheaper, for £500 and get the same power.

Yeah m9, you could also replace the interior with the entirety of the Demon Tweeks catalogue and it'd be exactly like a noble

[TTR46]

Chapppers said:

TTR46 said:

Chapppers said:

Yeah they're cool cars but I don't see the point when you can just chip a Fiesta ST, which is £5k cheaper, for £500 and get the same power.

Yeah m9, you could also replace the interior with the entirety of the Demon Tweeks catalogue and it'd be exactly like a noble

or just buy a mk1 mondeo?

I think you're onto something here.....

[TTR46]

chrismc1977 said:

TTR46 said:

I dare say you've been misinformed

Ah ok- I see you’ve edited your spec to include the turbo....

I’ve heard of several BRZ/GT86 lunching bottom ends- that’s several too many in my book! Shouldn’t happen!

No doubt the chassis is well-regarded, but I still feel it’s let down by the motor in standard guise. ~200hp N/A hauling 1240kgs simply doesn’t cut it in any kind of performance stakes nowadays.

I just question what performance the designers were aiming for?

I’m mindful that my old Integra makes ~190hp from a N/A 1800 & weighs ~1100kgs & that design is over 20yrs old now....my guess is it would absolutely run rings around a stock BRZ with some similarly talented pedalling though.

I can see why forced induction is a popular route to take.....

You would guess wrong, a friend of equal driving skills used to have a DC2 Type R. Here's a video of me following:

https://youtu.be/NEvX-YNiez0

the BRZ was comfortably faster. We're on the same tyres and also have similar brake compounds.

95% of people can't drive a 400hp-500hp cars fast, so what's the point in most cars having 400hp but for pub bragging rights?

The fact I have a Turbo 86 wasn't born out of a necessity for more power, more from the annoyance that people with more power couldn't drive faster or let me by

[TTR46]

chrismc1977 said:

Comfortably? Quite some claim- wonder how it would pan out if you swapped cars....

Well I was able to keep up with him whilst shifting at 6k to manage oil temps, so yeah, comfortably

Anyway, if you don't like GT86's, you don't have to look at my build thread. Simple really

[TTR46]

Christmassss said:

To get the thread back on track, nice car, sensible mods. Bet it is an absolute blast to drive.

Thanks dude, it's pretty awesome. Batst scary in the wet on Semi slicks though!

[TTR46]

Christmassss said:

I can imagine, what is the power delivery like?

Not very subtle, going to be remapped after the engine is rebuilt to get the boost to come in slightly smoother. That being said, once you're at 4k rpm, the power delivery is pretty smooth. So on track, it's not a massive issue. However on road, getting into boost can be spikey (But very fun! ).

seiben said:

Not quite sure what's going on with this thread, but hey - nice to see F2 TSS back again. It was a proper weapon the various times I saw it running in the Toyota Sprint Series while it was still naturally aspirated, so it must be a blast with 400bhp! hehe

Are you tempted to take it sprinting again?

No plans to take it sprinting as of yet, just track days for now (Just offers way better value for money). I am debating entering UK Time Attack, but we'll see where the car is a few months down the line!

[TTR46]

Christmassss said:

Big fan of some old school power delivery! Have you got any more videos of it?

Unfortunately the on board of the PHSS track session is the only video I've got! Hopefully will have it up and running for Snetterton at the end of Feb 🤞

[TTR46]

TommyHonda said:

Have been out in this and it certainly is a weapon! Was going round pretty much everything on track at the last Silverstone SS, sweet ride dude

Thanks man, hopefully see you in one soon?

Bright Halo said:

Looking really good.
I have a couple of RX8’s and the GT86/BRZ are a very close modern equivelant with similar handling.
Both drive really well but are even nicer with increased power!
Bet yours with 400hp is something special. Loveing your mods.

I've always been tempted by an RX8, so much car for the money these days! But yes 400hp does make it go like a scolded rat!

Certainly faster than a lot of things in a straight line, but most importantly in the twisties and on the brakes is where this thing really shines

[TTR46]

mattman said:

Hey TTR - car looks great - definately better than the crappy fiesta washing machine

Really hoping they are just trolling - if not its quite sad.

How easy is it to up the performance on the standard motor and can you share roughly what sort of cost you need for what sort of performance increase?

Seen a few of these coming down in price so looks like an idealy candidate for a bit of tweaking.

They are trolling, fortunately haha.

If you're looking to stay N/A, then you can gain about 10% at the top end for around £1500. That would pretty much consist of a new manifold, a remap and an air filter. But the more impressive gains with N/A tuning really come in the midrange where people have gained 30hp/40lbft of Torque. Makes a hell of a difference to how lively the car feels! Gives it a fair bit more urgency and motorway pull for daily driving.

Anything more than that and you'd be looking at Turbo/Supercharging which typically net you a 50% increase in power (280hp-300hp). For that kind of boost (no pun intended) you'd be parting way with about £4500-£6500 depending on what kit you choose. That being said, second hand Turbo kits and Superchargers do tend to pop up every now and then ranging from £2000-£3500

[TTR46]

Greendubber said:

Nice car. Not sure why it's attracted so many bell ends though!

Thanks dude! Must be the chav rear wing

[TTR46]

Been pondering for a while now on the need for FI in my 86, I suppose the only reason I got a boosted GT86 was due to the fact that I was getting frustrated when people wouldn't move over on the straights during track days, despite me catching them corners. But I always enjoyed the car in N/A form.

I've had a good offer for most of my running gear, so if that all goes through I'll probably be back to N/A before PHSS Silverstone. If not, I'll see if I can beat my 1:07 from last time out! (If the weather holds!). Then I'll see what strikes in terms of wanting more speed on track, suppose my driving could do with a fair bit of improvement before I think about wacking some boost on the car again.

[TTR46]

So, unfortunately the gentleman that wanted to buy my 86's running gear has since decided to go another way with his project.

So the plan is back to finishing mine off in all it's excessive glory. I guess it is a track car after all

Engine is currently being bored out by 0.5mm to clear some slightly larger pistons, also going to pick up a Cosworth sump baffle to avoid any oiling issues. Then a shakedown at the rescheduled PHSS Silverstone event!

So I suppose my list for the next few months is:

New AP 6pot Brakes up front with 355mmx32mm discs, really need the heat management a bigger/wider disc can provide.

Possibly a change in Turbo kit, certainly needs a new round of mapping.

Needs some interior thrown back in so ice doesn't keep forming on the inside of the bloody windshield!

After all that and a few more track days, I'm sure the car and my driving will present some areas to improve!

[TTR46]

These arrived today

Going to be tight getting the engine built, run in and mapped in time for PHSS, fingers crossed!

Edit: excuse the potato Camera Quality, broken Camera Lens.

[TTR46]

Well, had some bad news today. Crank is beyond repair

Definitely not going to make PHSS

On the plus side, more bits have arrived.

Hopefully the PFC's do a better job of fade resistance than the Ferodo's did!

[TTR46]

There's been some changes