GR86 Turbo / Supercharger

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Al4n

Totally Hooked
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A friend of mine lives in the states and says that turbo kits are coming out and a supercharger kit on the way. 300hp+ is being claimed.

Anyone fancy it?
 
Any intel on whether you realistically need forged internals like the GT86?
 
Usually the tolerances of modern engines allow 10 to 20% more power (no "hard" boundery, can vary from engine to engine due to design and matetials). After this individual point the possibility to burn out your engine like a shooting star increases dramatically: 270-280hp should be max. on a standard engine, beyond you'll need different hardware.
Having said that I suggest that you browse the webpage torqamp.com which gives you some ideas how to increase torque and add just a bit of power without risking your engine, without the need to improve internals and without throwing out too much money.

Bye for now Fred
 
Al4n said:
A friend of mine lives in the states and says that turbo kits are coming out and a supercharger kit on the way. 300hp+ is being claimed.

Anyone fancy it?
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Not worth losing the warranty on the engine IMO, but to each their own, I guess.
 
There a few kits out already.
The hks gt2 supercharger kit, jdl turbo kit, greddy turbo kit, and another US based one turbo kit I forgot the name.
There is even a 2.5L stroker kit by hks as well as some 1.2mm thick head gaskets.

Very difficult to justify the cost and risk of them IMO
 
Grblue86 said:
There a few kits out already.
The hks gt2 supercharger kit, jdl turbo kit, greddy turbo kit, and another US based one turbo kit I forgot the name.
There is even a 2.5L stroker kit by hks as well as some 1.2mm thick head gaskets.

Very difficult to justify the cost and risk of them IMO
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Tend to agree, with this being such a new platform I'd want to wait at least a few years to see how reliably others can extract more performance before boosting my own car.

I'm excited to see what the guys at Fensport will be able to do
 
I personally wouldn't. HKS have an online vid of the GR86 with a Turbo conversion and the gearbox (4th gear) blew after only a few laps. I don't think these engines or transmissions are well suited to FI and if anything, will drastically shorten the life span, screw-up any warranty 100% and also if somethign went wrong (likely), then you've fu**d a new car and have no warranty. I'll be staying stock and don't fancy spending £1,000's uprating the gearbox, clutch, cooling, or brakes.
If I was super rich and £33k was pocket change, sure, i'd throw a turbo in! But it's my new car and want to keep it for many, many years myself.
 
Jayware33 said:
I personally wouldn't. HKS have an online vid of the GR86 with a Turbo conversion and the gearbox (4th gear) blew after only a few laps. I don't think these engines or transmissions are well suited to FI and if anything, will drastically shorten the life span, screw-up any warranty 100% and also if somethign went wrong (likely), then you've fu**d a new car and have no warranty. I'll be staying stock and don't fancy spending £1,000's uprating the gearbox, clutch, cooling, or brakes.
If I was super rich and £33k was pocket change, sure, i'd throw a turbo in! But it's my new car and want to keep it for many, many years myself.
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It's a slippery slope, then your GR86 isn't a GR86 anymore and you should have just bought something quicker in the first place.

I reckon the limiting factor will be the gearbox, the manual AZ6 was/is rated to 250NM which is what the FA24 puts out from the factory, I know they have beefed it up a little but it won't be by much, it's designed to be a lightweight 'medium torque' rated gearbox.
 
ZN8 said:
It's a slippery slope, then your GR86 isn't a GR86 anymore and you should have just bought something quicker in the first place.

I reckon the limiting factor will be the gearbox, the manual AZ6 was/is rated to 250NM which is what the FA24 puts out from the factory, I know they have beefed it up a little but it won't be by much, it's designed to be a lightweight 'medium torque' rated gearbox.
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Picking on the "just bought something else" comment. I have thought about this, even while waiting for delivery, my problem is the maintenance and not so much the initial outlay.
My opinion is that even if you put £10k on gr86 mods, it will still be cheaper to maintain than a cayman at £40k and you are likely going to drive it with more enthusiasm than the porsche

So what car could you change to that will cost similar money and you will still drive it properly?
 
Grblue86 said:
Picking on the "just bought something else" comment. I have thought about this, even while waiting for delivery, my problem is the maintenance and not so much the initial outlay.
My opinion is that even if you put £10k on gr86 mods, it will still be cheaper to maintain than a cayman at £40k and you are likely going to drive it with more enthusiasm than the porsche

So what car could you change to that will cost similar money and you will still drive it properly?
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My experience with modifying cars is there is always a compromise, whether its NVH, comfort, reliability, longevity, cost etc. You will be chasing the next weakest link. Then there is the complications of invalidated warranty. I disagree that a highly strung GR86 will go the legs compared to something from Stuttgart.
 
For me, the appeal of the GR86 (and GT86 before it) is precisely BECAUSE they are not that fast (relatively speaking) and you have to work for the performance.

Each to their own and I can see the appeal for some, but adding something that dramatically increases performance and changes the character is the last thing I would do.

Where the (standard) GT86 could frustrate a little at times, the added power and flexibility of the GR makes the performance absolutely spot on for me and the roads I drive on currently.
 
Silver Fox said:
For me, the appeal of the GR86 (and GT86 before it) is precisely BECAUSE they are not that fast (relatively speaking) and you have to work for the performance.

Each to their own and I can see the appeal for some, but adding something that dramatically increases performance and changes the character is the last thing I would do.

Where the (standard) GT86 could frustrate a little at times, the added power and flexibility of the GR makes the performance absolutely spot on for me and the roads I drive on currently.
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I'm inclined to agree with Mr Fox on this one - the GR86 is a great car because its power and handling is well matched for everyday use on British roads.

The average BLTN86 can drive it 'spiritedly' without doing silly speeds and putting himself in danger of losing his license (or a limb!), and still have a lot of fun.

Edit: appreciate this potentially says as much about my inability as a driver as it does about how much power is enough!
 
I rarely find it slow. Perhaps on motorways but it's not for that and at motorway speeds the pickup is fine anyway. Probably the most stable car I've had once geo was done at speed. It's specialty is under 70 which legally is all we need. I even find myself holding back to get red lights to ensure the section is clear when it goes green and I'm as fast if not a touch faster than my vRS would be, especially on the corners. It's just a different technique being RWD
 
Yes, I wouldn't turbo or supercharge it. It is way too soon and you are likely correct that a turbo'ed fa24 might cost more to maintain than something German, specially with so few cars sold here.
 
BLTN86 said:
I'm inclined to agree with Mr Fox on this one - the GR86 is a great car because its power and handling is well matched for everyday use on British roads.

The average BLTN86 can drive it 'spiritedly' without doing silly speeds and putting himself in danger of losing his license (or a limb!), and still have a lot of fun.

Edit: appreciate this potentially says as much about my inability as a driver as it does about how much power is enough!
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100% agree with both of you on this 🤙
 
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