Toyota 86

[brad]

I like the design brief for the 86 and I can understand why Toyota won't offer a turbo version.

But then again it is a little underpowered (my opinion). I would prefer a supercharger to a turbo, some decent aftermarket kits around for it, this is just one option: Toyota 86 supercharger kit | review | carsguide.com.au

I have a few aquaintances that have bought the GT86, GTS86 & the Subaru. The GT86 & Subaru guys have left theirs stock & once they got used to a revised driving style (both had Subaru Liberty, one was a turbo) & they claim the power is adequate. The guy with the GTS86 has done some extensive mods including remapping the ECU. The basic map is written for 92ron & is biased towards fuel economy. Remapping for 98ron produces noticeable increases in power. Last time I spoke to him he was working on a map for E85 & he expected the power to exceed 200kw with inlet & exhaust mods. All 3 of them feel that going turbo would upset the balance / power delivery.

[VWindahouse]

I have a few aquaintances that have bought the GT86, GTS86 & the Subaru. The GT86 & Subaru guys have left theirs stock & once they got used to a revised driving style (both had Subaru Liberty, one was a turbo) & they claim the power is adequate. The guy with the GTS86 has done some extensive mods including remapping the ECU. The basic map is written for 92ron & is biased towards fuel economy. Remapping for 98ron produces noticeable increases in power. Last time I spoke to him he was working on a map for E85 & he expected the power to exceed 200kw with inlet & exhaust mods. All 3 of them feel that going turbo would upset the balance / power delivery.

Sorry but your friend is dreaming. The turbo charged 86 that came second in the Motor Magazine tuner challenge that has a Garrett disco potato running higher boost sine then at 12psi only makes 197kW atw, and that's with all the supporting mods you can dream of. Pick up a current issue of Fast 4's for the full write up. And not to mention E85 will only give large gains with forced induction (sorry don't have time to explain so goggle is your friend).

[brad]

Sorry but your friend is dreaming. The turbo charged 86 that came second in the Motor Magazine tuner challenge that has a Garrett disco potato running higher boost sine then at 12psi only makes 197kW atw, and that's with all the supporting mods you can dream of. Pick up a current issue of Fast 4's for the full write up. And not to mention E85 will only give large gains with forced induction (sorry don't have time to explain so goggle is your friend).

200kw at the crank (+30% over stock?). Not the wheels.

I've seen how he tuned his Subaru. If he says he'll achieve something he generally does.

I think the main point I was trying to make was that most people that own the Toyobaru twins find the power adequate whereas people that don't own them are the ones that say they are under-powered.

[VWindahouse]

200kw at the crank (+30% over stock?). Not the wheels.

I've seen how he tuned his Subaru. If he says he'll achieve something he generally does.

I think the main point I was trying to make was that most people that own the Toyobaru twins find the power adequate whereas people that don't own them are the ones that say they are under-powered.

Sorry crank - different story. However the twins loose a heap in drive train loss as they struggle to crack 100kW atw with intake and exhaust (no tune). However at the wheels figures are unfortunately what matter in this case because of you stated point about driving feel and dynamics. If the power isn't getting to the wheels then how could you judge in which manner the dynamics have changed??

[brad]

Sorry crank - different story. However the twins loose a heap in drive train loss as they struggle to crack 100kW atw with intake and exhaust (no tune). However at the wheels figures are unfortunately what matter in this case because of you stated point about driving feel and dynamics. If the power isn't getting to the wheels then how could you judge in which manner the dynamics have changed??

They are losing 30%?

That's about what my AWD Liberty was losing. It must be a very ineffecient drivetrain.

[stickshift3000]

I think the main point I was trying to make was that most people that own the Toyobaru twins find the power adequate whereas people that don't own them are the ones that say they are under-powered.

It's the torque curve that I would like to improve (with a supercharger), not necessarily peak hp.

[VWindahouse]

It's the torque curve that I would like to improve (with a supercharger), not necessarily peak hp.

Very true. Tenko didn't mention what torque figures they were seeing, does anyone know?

[team_v]

Very true. Tenko didn't mention what torque figures they were seeing, does anyone know?

The HKS Kit has a massive dip in the torque curve, it isn't smooth at all :|
I believe they have other issues as the compression is quite high which could lead to detonation and it's harder to get big power from FI with a compression of 10.5:1.



GT Supercharger kit: 236.8ps/6300rpm and 27.0kgf･m/5600-6600rpm

Normal: 184.7ps/6800rpm and 20.3kgf･m/4700rpm

Note, torque is the top lines.

[VWindahouse]

Hmmm interesting. Plus the article on the Tenko turbo 86 says they run 12:1 CR (stock unopened engine not 10:5.1) on 12psi with no dramas.