Originally Posted by Pascs
I would say the cams look very good with peak power at 6500rpm and no loss of low down power.
Sorry Pascs, but I don't agree with that estimation at all. If you study the chart more closely, it shows the torque virtually explodes from 135Nm to 220Nm inside 500Rpm's.
As you rightfully say it feels like the stock TS does not have much torque below 3000, but with stock cams there is a very noticeable difference in the driving experience over the type of Cams in Marko's engine. I've got a few dyno chats of stock 2,0 TS 16v before and after a remap. The torque curves (before remap) is more or less as follows: 105Nm @ 1500Rpm, 115Nm @ 1750Rpm, 140Nm at 2500Rpm, 160Nm at 3000 175Nm at 3500Rpm.
What this profile gives is at least some low end grunt, and a relative flat torque curve, with a gradual increase of power across the revband. A flat torque curve, is what helps you accelerate smoothly. Getting a huge chunk of torque in one big bang, makes the cluch/accelerator action hard to balance, and the car will feel like it has Turbo lag. (At least in a Manual)
A remap will give you about 130Nm @ 1500Rpm, 160Nm @ 2200Rpm, building up to about 190Nm at 3500Rpm, which holds till about 5500Rpm. As you know a resonably flat torque curve across the mid range of the revband is what you really need for day to day driveability. (2200-5500Rpm) Ideally you want full flat torque from top to bottom of the revband, but that won't happen in a 2 liter 4 pot multi valve
I'm not having a go at Marko choice of cams. I think if you enjoy reving the engine, and dont do much city driving, then they are the right choice, and must be a hoot on the B-roads. But i thought it would be fair to discuss the costs of geting those high Bhp figures. 191 Bhp is really impressive from a 2 liter when you look at it from a distance, but i would personally never sacrifice the day to day driveability of my car for another 10-15bhp. i really think the Fast road I cams from C&B, gives you the best of both worlds. You get a rock steady idle @ 950Rpm, more power across the entire rev band, and more Bhp, albeit a more modest gain compared to the more agressive cam profiles. Those i've seen with the Fast Road I cams installed, all ended in the 173-182 Bhp range. The 10Bhp difference is probably more down to differences in dyno calibration, then it is to differences to the engines. A resonably qualified guess would be that the Fast road I cams gives you 175Bhp when a remap and some improved air intake system is also done. If you add a port and polish of the head to the equation, you can expect another 8-10 bhp, plus added torque. So thats 185'ish Bhp and a sweet engine which can pull across the rev band. Good for both city, B-roads & Track