Car Talk - Non S2000 General Motoring and Non S2000 Car Talk

Confession Time - MK3 MX5?

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Old Jan 9, 2013 | 03:48 AM
  #11  
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Originally Posted by SCZ4
Originally Posted by Ultra_Nexus' timestamp='1357730027' post='22255202
The Science of Speed kit on Blue Monster's car seems to be extremely robust. A couple of the bolts were chocolate, but other than that the kit is spot on. The issues with it were down to external factors, but i'd recommend it to anyone.

In addition, I don't understand how a twin-screw can defy physics. It is still driven by the crank and it will still create more boost at higher rpm!
Thanks, will take a look into it, but for some reason a supercharged S2000 just doesn't appeal. The S2000 has enough power for the road, just not the grunt or torque if that makes sense. Besides, I wouldn't want to change the way the power is delivered, I love it.
You need to have a go in one! at 5500rpm the SOS kit is developing 250bhp (Or full power N/A). That is what I call mid range punch. It doesn't lose it's character at all. The delivery is smooth and progressive whilst still being a rev monster. The way boost is created is nigh on linear too.

Originally Posted by SCZ4
Not sure, don't even pretend to understand these things I just remember it seems to be the best of both worlds, behaves more like a turbo in terms of boost lower down, saps very little power from the engine and doesn't have the heat inefficiencies associated with a turbo.

More info here if you're interested -

http://www.esstuning.com/products/M5...%28TS2%29.html

ESS TS Series superchargers with it's Lysholm supercharger technology and CAD designed intake runners creates boost the instant the throttle is touched usually reaching full boost by ~2200 rpm – long before a centrifugal supercharger commonly even creates 1psi of boost, resulting in breathtaking low-mid range acceleration and it also removes the need to rev the engine high to get good acceleration.

The ESS M54B30 TS2 series system is equipped with a Lysholm Twin Screw supercharger which has several advantages over the centrifugal compressors used in earlier ESS M52TU/M54 systems. It creates a higher boost-pressure at lower engine rpm, thus significantly increasing bottom and mid range torque. Lag time during shifts and on-off throttling are reduced to a minimum and the throttle response is incredible. The twin screw principle is also highly energy efficient, which contributes to the extreme power and torque output of the ESS TS Series systems. The patented liquid intercooling system consists of 3X500mm Laminova cores integrated into a high strength cast aluminium ESS intake manifold system
This is the thing, a centrifugal can create high boost pressure at low rpm, you just need to alter the pulley size. The issue you'd have is that the centrifugal compressor has an RPM efficiency range and you need to optimise that to your engine. By doing so you are presented with the most efficient form of supercharging. A screw is used purely for packaging/fittment reasons.
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Old Jan 9, 2013 | 04:32 AM
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Sorry to drag slightly off topic, but I thought Mazda did an MPS version with a turbo which was around 230hp? Surely that would be ideal for you?
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Old Jan 9, 2013 | 04:34 AM
  #13  
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I want a roadster, not a hatchback

Besides, my wife already has a 2010 Mazda 3 with the same 2.0 engine as the MX5 and it's a decent car, only let down by the interior, handles very well.
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Old Jan 9, 2013 | 04:41 AM
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I'm talking about the MX5 Could have sworn they launched an MPS version a few years back, albeit the one with the folding tin top
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Old Jan 9, 2013 | 04:42 AM
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Originally Posted by Scottland
I'm talking about the MX5 Could have sworn they launched an MPS version a few years about, albeit the one with the folding tin top
Sadly not... would of been nice though.
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Old Jan 9, 2013 | 07:40 AM
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Ron, you beat me to it .

1,500 miles in (and bow1build had done around the same mileage) and not a single issue - you only have to look on the US forum and no one seems to have a bad word to say about the SOS kit and I use the car as my daily driver.

As Ron stated I had a few issues on set up but they were external factors such as a collapsed race cat and a leaking valve on an aftercooler that shouldn't have been there in the first place but that is by the by.

Performance is electrifying to say the least and with approx 450bhp and 291 ft / lbs of torque which now gives it that low down grunt that it has always missed - you only have to take a look at the graph below to see how smooth the power delivery is:

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Old Jan 9, 2013 | 07:55 AM
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Fair enough, looks impressive Hope it continues to be as reliable when you start putting more miles on it, would be good if it proves to be a quality product, that was definitely missing when I looked to buy a S2000 3 or 4 years back.

I wouldn't be looking for that sort of power on the road, 350bhp would be enough. That's one thing that's very satisfying about the standard S2000, you can keep your foot to the floor and you're not piling on serious speeds... relatively, that is. I'd argue 450bhp is wasted on the road, can't believe I said that But it's why a 'charged MX5 would be ideal. All the satisfaction of ringing the neck off the car, with a nice whine to go with

The other good thing about the MX5 kit is you don't need to upgrade exhausts etc, S2000 seems to need a new system and I've yet to see a system which has oval dual outlets, sounds good and doesn't boom. Plus if\when the S2000 goes boom it's expensive and difficult to find a decent replacement engine, where as a MX5 engine is just a Ford Duratec and much cheaper to source, plentiful too.

Out of interest, did you import the kit yourself, or did someone in the UK supply and fit it?
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Old Jan 9, 2013 | 08:03 AM
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I bought the kit from bow1build who had the kit imported from the US via Dixon (DMS) - see here for the original build thread from last February.

And, here for my build thread.
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Old Jan 9, 2013 | 10:52 AM
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i can see the point but it's a heart thing rather than a head thing so difficult to justify objectively.

i'm not sure it'll be much quicker than your stock S. It's less likely to be as much fun, in terms of the engine at least. If you dont change the wheels/tyres etc it will be more... lively.. i guess.

450bhp in an S must feel a lot. My M3 has less and has bigger tyres and TC and the light is... well used . that kit isnt cheap, did you also fit a clutch?
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Old Jan 9, 2013 | 10:59 AM
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Originally Posted by Nottm_S2
450bhp in an S must feel a lot. My M3 has less and has bigger tyres and TC and the light is... well used . that kit isnt cheap, did you also fit a clutch?
Yes, as I was also getting a few parts from SOS I got one of their sports clutches which is extremely good & feels the same if not slightly lighter than the OEM one.
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