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spikyone

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spikyone last won the day on May 24

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About spikyone

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  • Birthday August 9

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    Swindon
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  1. spikyone

    In comes the GR86

    That bumper looks a bit too aftermarket in my eyes, but it does fix the biggest issue with the front end styling, which is that the tall and narrow grille on the GR86 makes the whole car look too tall and narrow and makes the nose look a bit dumpy.
  2. spikyone

    GR86 or turbo gt86

    Not for a while yet, they only had the US press reviews last week, it'll be a while before UK press reviews, and public drives will be some time after that.
  3. spikyone

    GR86 or turbo gt86

    GT86 is better looking, IMO. Stock Vs stock, the GR86 seems like it might be a better car in pretty much every way. I'm certainly interested to try one and see how it compares to my SC'd GT86, it'd have to be pretty damn good for me to consider switching though.
  4. Interested in your thoughts once you've had a chance to try it out @Leeky. Do you track your car?
  5. spikyone

    Standard manifold

    Depending on where you're based, I have one too - I'm in Swindon.
  6. What I meant was, nobody goes to their tuner and asks for a certain amount of torque; nor do they say "what a lovely car, how much torque does it make?". People talk in terms of how much power their car makes, so equally it makes sense for tuners to specify a certain power output as being safe. I'll also say that torque doesn't matter per se; that's what a gearbox is for. The shape of the torque curve is what matters more (see the infamous torque dip). If you're sacrificing a flat torque curve to increase your peak torque, you'll end up with an engine with a drop-off somewhere in the rev range - it will either feel peaky or asthmatic.
  7. 300bhp is based on mapping for the best possible torque curve. There's no way to get over 300bhp without adding more torque, and most people are interested in power output rather than torque output so it makes sense to say 300bhp as a limit. I think it's probably more a case of how you drive in low gears vs high gears that leads to the perception of higher gears being the issue. In short, if you're using all the torque, and the torque is too high, you'll bend a rod.
  8. It sort of means rpm; rpm is a non-standard unit, so to do torque x speed = power, you have to use: Torque in Nm Speed* in radians per second Power in Watts You can do a calculation using other units (e.g. rpm for speed) but you have to use a conversion factor to correct it. To get more power, you would generally want more torque, yes. However you can also achieve it by changing where the peak torque occurs, depending on the engine characteristics. So if you had peak power at, say, 4000rpm, it might be that your torque drops off at higher rpms. You might be able to increase the torque at 6000rpm so that it's the same torque you previously made at 4000rpm: in that case your peak torque figure hasn't changed, but because it occurs at a higher rpm you'll make a higher power. It will mean that instead of making peak power at 4000rpm, you'd make peak power at 6000rpm. Hopefully that makes sense... If your car is tuned properly with forced induction, you won't be in a situation where you can add more power by changing the shape of the torque curve though. Peak power for these engines is very high in the rev range and the torque curve should be fairly flat in that region. Just my opinion here, but a GT86 with nearly 300bhp (as you'd get with forced induction) is pretty quick. To get that power, with appropriate suspension/brake upgrades, is going to cost £8-10k. If you really want more than 300bhp you'd be better off selling the GT86 and buying something else. (*As a note, "speed" is actually angular velocity, but I thought that was even more confusing!)
  9. Power is torque x speed (with a multiplier if you're not using Nm and radians/sec), not torque x time. So, at a given engine rpm, if you increase the torque, you will also increase power at that rpm. When you see dyno graphs, they use rpm as the x-axis (along the bottom), and both torque and power on the y-axis. If you pick a certain rpm - say 4000rpm - the engine will make a certain torque, and as a result of that, a particular power. If you increase the torque at 4000rpm (by tuning), you'll have more power at 4000rpm.
  10. spikyone

    In comes the GR86

    I wonder whether they've upgraded the rods compared to the FA20 though? The rods in the FA20 would certainly be strong enough for the FA24's output, and the stroke is 86mm again. That could limit the potential for FI on the new one to be a similar level to the first gen. I'll be at FOS too and will definitely be paying Toyota a visit 😁
  11. spikyone

    Post your GT86 / BRZ pic of day!

    A little dirty - OK, very dirty - and I actually took this a couple of weeks ago. One thing Toyota got right with the GR86 was giving it a lip spoiler instead of the fussy OEM ones that came on the GT86.
  12. Good question. I guess I went to it as a default when I had the SC fitted as it was something I'd been thinking about. If I was only using it for the road I might have done something similar to Martin, and waited to see whether it seemed like it was getting particularly hot. Martin's thread is great for inspiration. I've tried to upgrade my car without compromise and using good quality parts, and Martin has definitely taken a similar approach.
  13. I suppose it depends what you mean by better. I take my car on track so under-bonnet temperatures were more of a concern, and seeing Martin's comments on his thread I felt that there would be a benefit in swapping. I also had the same issue where the TD manifold was tight against the front of the engine. No issues and when I asked Mike at TD about it he said it was normal, but having it out of the way felt like a benefit. I also thought the Rogue looked nicely engineered. I still need to get around to selling my TD manifold too, which should recoup some of the cost. Since it was done at the same time as the SC and some other work the cost was less noticeable.
  14. Harrop supercharger and Rogue Motorsport EL manifold. I previously had the Tuning Developments manifold. Martin on here had his Harrop fitted with his existing TD manifold a few months before me and was concerned the engine bay was getting a bit hot, as the TD manifold loops up into the bay, so he switched to the Rogue manifold around the time I booked in to get the SC fitted. I saw his pictures and got serious manifold envy, so I ended up going the same route.
  15. My car has passed an MOT emissions test with a supercharger and just the secondary cat. So if you were to go turbo, that should also pass emissions. The issue with only one cat is getting the secondary cat hot enough, which a turbo/SC will help with. You shouldn't need a new exhaust unless you're going for very high power, at which point you'd be looking at strengthening the engine's internals - you will most likely need forged rods before you need a higher flowing exhaust. In terms of enough grip, Michelin PS4 (I guess that's what you mean) are very good. Someone was actually running SC with the stock Primacy tyres, which seems like madness to me and was probably enough to focus the attention when it's cold and wet. I'm on slightly wider PS4, and there is plenty of grip. The big advantages I've found with PS4 are better wet/cold weather performance, and a more progressive feel when they start losing grip; the feel through them is far better than the Primacy tyres that (to me) always felt like there was a very fine line between on the limit and over the limit. I'd be happy to run SC with stock wheels on PS4.
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