Toyota GT86 - Owned
Discussion
From what I've read, I don't think the Cosworth suits my requirements quite so well.
It produces more power and torque certainly, but more aggressive than the Harrop Eaton. I guess it's the 'better' solution if you want big numbers and track performance, but for my B road and lane driving I think the Harrop wins the day.
Like the Cosworth, it looks like pretty OE installation too:
Harrop graph
Abbey Motorsport graph
Add c. 40 BHP for flywheel figure.
It produces more power and torque certainly, but more aggressive than the Harrop Eaton. I guess it's the 'better' solution if you want big numbers and track performance, but for my B road and lane driving I think the Harrop wins the day.
Like the Cosworth, it looks like pretty OE installation too:
Harrop graph
Abbey Motorsport graph
| Hub | Torque | Power |
|---|---|---|
| Stock | 143 lb-ft | 167 BHP |
| TVS1320 | 206 lb-ft | 252 BHP |
| Difference | +44% | +50% |
Add c. 40 BHP for flywheel figure.
Edited by LordGrover on Friday 4th March 14:45
Podie said:
Changed the wheels on my Focus ST to OZs - saved 3KG per corner over the OEM Ronals, and it really made a huge difference to the feel of the car.
Have to say, I agree. 
It's the first time I've 'upgraded' my wheels and amazed at the difference. I'm working down in Wimborne at the moment which is two hours each way on A and B roads, no dual carriageway let alone motorway. Some great roads which were great fun this morning and on the way back. There's a stretch just after Shaftesbury up zig-zag hill and over the top which is awesome as the sun rises.
Went up to Warrington on Sunday for Tuning Developments open day. I'd wanted to see and try their turbo-charged GT86, but they were so busy I didn't get the chance to go out in it. It looks like a neat installation though. Having driven DaveJH's turbo I think I have an idea of how it'd perform anyway.
Yesterday I went to Abbey Motorsport at Oxted. Mark took me out in their Harrop/Eaton supercharged car, which is largely standard including OEM exhaust, though it has HKS dampers and big wheels. It's impressive. Unlike the turbo, there's a gradual build from low down - it feels more like a large capacity V8 to me. It was reminiscent of my TVR Griffith in its delivery. Not mind blowing but purposeful. I like it.
If I'm to go FI then it'll be the Harrop supercharger, but I'm still concerned that I'd miss revving the nuts off the NA engine.
I'm worried about making an expensive mistake, which I'll regret. I really like it the way it is, but the temptation to add some lazy grunt may persuade me to make the jump.
First world problems, eh?
Yesterday I went to Abbey Motorsport at Oxted. Mark took me out in their Harrop/Eaton supercharged car, which is largely standard including OEM exhaust, though it has HKS dampers and big wheels. It's impressive. Unlike the turbo, there's a gradual build from low down - it feels more like a large capacity V8 to me. It was reminiscent of my TVR Griffith in its delivery. Not mind blowing but purposeful. I like it.
If I'm to go FI then it'll be the Harrop supercharger, but I'm still concerned that I'd miss revving the nuts off the NA engine.
I'm worried about making an expensive mistake, which I'll regret. I really like it the way it is, but the temptation to add some lazy grunt may persuade me to make the jump.
First world problems, eh?
Yep. A 20 minute test drive isn't enough really. It feels great when you press on, though I didn't try it much even then, but on another forum someone who's gone for it has raised a doubt or two.
I've not noticed any change in mpg, but then I don't monitor it closely anyway.
Had alignment reset while at Abbey though - the new wheels, tyres and geo has made a massive difference - also lubricated the ARB bushes which has stopped the perishing squeaks! Much nicer to drive now.
cosworth sc owner said:
My honest opinion is that the car N/A has more than enough power for driving twisty B roads. I just find I have to back off way earlier now with the SC, which in many ways makes it less enjoyable.
gt86.orgI've not noticed any change in mpg, but then I don't monitor it closely anyway.
Had alignment reset while at Abbey though - the new wheels, tyres and geo has made a massive difference - also lubricated the ARB bushes which has stopped the perishing squeaks! Much nicer to drive now.
A couple of days up t'North at Tuning Developments has resulted in this:
A very happy customer. Not so sure Mike is quite so happy though...
Apparently my car decided to have a hissy fit, or three. They were working on it all day yesterday until after 9pm and again this morning until I collected it this afternoon. Some issue with the ECU becoming write protected or locked I think, but whatever - all good now.
Power and torque are up. When I'm next in the office I'll scan the graph, but the important thing is obvious as soon as you pull away, without the need for numbers and curves. The torque dip is no more! It has ceased to be! It's expired and gone to meet its maker!
Something I may need to look at though, is the exhaust volume. First of all you think it sounds great, especially if you're a childish twerp like me. It's got a proper Subaru burble that turns into a (almost) NASCAR bark on full chat. I know you won't believe it, but it seriously sounds way more NASCAR than most proper V8s I've heard.
However, it's pretty anti-social and I occasionally start early leaving home at 0600. I'll pop over to Infinity and have a chat - maybe its something they can sort out.
The Bilstein coilovers are great so far, though it's only been a 3.1/2 hour stop start motorway journey home and a very quick blast through the lanes when I got local. Handling feels much more grown up and well behaved and inspires confidence, as well as soothing the ride quality.
A very happy customer. Not so sure Mike is quite so happy though...
Apparently my car decided to have a hissy fit, or three. They were working on it all day yesterday until after 9pm and again this morning until I collected it this afternoon. Some issue with the ECU becoming write protected or locked I think, but whatever - all good now.Power and torque are up. When I'm next in the office I'll scan the graph, but the important thing is obvious as soon as you pull away, without the need for numbers and curves. The torque dip is no more! It has ceased to be! It's expired and gone to meet its maker!
Something I may need to look at though, is the exhaust volume. First of all you think it sounds great, especially if you're a childish twerp like me. It's got a proper Subaru burble that turns into a (almost) NASCAR bark on full chat. I know you won't believe it, but it seriously sounds way more NASCAR than most proper V8s I've heard.
However, it's pretty anti-social and I occasionally start early leaving home at 0600. I'll pop over to Infinity and have a chat - maybe its something they can sort out.
The Bilstein coilovers are great so far, though it's only been a 3.1/2 hour stop start motorway journey home and a very quick blast through the lanes when I got local. Handling feels much more grown up and well behaved and inspires confidence, as well as soothing the ride quality.
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